10-K

Thanks, M 

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2019

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE TRANSITION PERIOD FROM                      TO                      

Commission File Number: 001-36284

Biocept, Inc.

(Exact name of Registrant as specified in its Charter)

Delaware	80-0943522
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
5810 Nancy Ridge Drive, San Diego, California	92121
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (858) 320-8200

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $.0001 per share	BIOC	The Nasdaq Stock Market LLC

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    YES  ☐    NO  ☒

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.    YES  ☐    NO  ☒

Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    YES  ☒    NO  ☐

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files).    YES  ☒    NO  ☐

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definition of “large accelerated filer”, “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act:

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Smaller reporting company	☒
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.☐

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES  ☐    NO  ☒

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the Registrant, based on the closing price of the shares of common stock on The Nasdaq Stock Market on June 28, 2019, was $25,526,638.

The number of shares of Registrant’s Common Stock outstanding as of March 20, 2020 was 108,707,392.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive Proxy Statement for the 2020 Annual Meeting of Stockholders, to be filed with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Form 10-K, are incorporated by reference in Part III, Items 10-14 of this Form 10-K. Except for the portions of the Proxy Statement specifically incorporated by reference in this Form 10-K, the Proxy Statement shall not be deemed to be filed as part hereof.

TABLE OF CONTENTS

Part I
Item 1	Business	3
Item 1A	Risk Factors	35
Item 1B	Unresolved Staff Comments	65
Item 2	Properties	65
Item 3	Legal Proceedings	65
Item 4	Mine Safety Disclosures	65
Part II
Item 5	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	66
Item 6	Selected Financial Data	66
Item 7	Management’s Discussion and Analysis of Financial Condition and Results of Operations	67
Item 7A	Quantitative and Qualitative Disclosures About Market Risk	77
Item 8	Financial Statements and Supplementary Data	78
Item 9	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	113
Item 9A	Controls and Procedures	113
Item 9B	Other Information	113
Part III
Item 10	Directors, Executive Officers and Corporate Governance	114
Item 11	Executive Compensation	114
Item 12	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	114
Item 13	Certain Relationships and Related Transactions, and Director Independence	114
Item 14	Principal Accounting Fees and Services	114
Part IV
Item 15	Exhibits, Financial Statement Schedules	115
Item 16	Form 10-K Summary	115
Signatures		120

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K, or Annual Report, contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements included or incorporated by reference in this Annual Report other than statements of historical fact, are forward-looking statements. You can identify these and other forward-looking statements by the use of words such as “may,” “will,” “could,” “anticipate,” “expect,” “intend,” “believe,” “continue” or the negative of such terms, or other comparable terminology. Forward-looking statements also include the assumptions underlying or relating to such statements. In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based upon information available to us as of the date of this Annual Report, and while we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these statements.

Our actual results could differ materially from those anticipated in these forward-looking statements as a result of various factors, including those set forth below under the caption “Risk Factors” in Part I, Item 1A and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of this Annual Report and elsewhere in this Annual Report. Moreover, we operate in an evolving environment. New risk factors and uncertainties emerge from time to time and it is not possible for us to predict all risk factors and uncertainties, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. Readers are cautioned not to place undue reliance on forward-looking statements. The forward-looking statements speak only as of the date on which they are made and we undertake no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they are made except as required by law. Readers should, however, review the factors and risks we describe in this Annual Report and in the reports we subsequently file from time to time with the Securities and Exchange Commission, or the SEC.

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PART I

Item 1. Business

Overview

We are an early stage molecular oncology diagnostics company that develops and commercializes proprietary circulating tumor cell, or CTC, and circulating tumor DNA, or ctDNA, assays utilizing a standard blood sample, or “liquid biopsy.” Our current and planned assays are intended to provide information to aid healthcare providers to identify specific oncogenic alterations that may qualify a subset of cancer patients for targeted therapy at diagnosis, show progression or be used for monitoring in order to identify specific resistance mechanisms. Sometimes traditional procedures, such as surgical tissue biopsies, result in tumor tissue that is insufficient and/or unable to provide the molecular subtype information necessary for clinical decisions. Our assays, performed on blood, have the potential to provide more contemporaneous information on the characteristics of a patient’s disease when compared with tissue biopsy and radiographic imaging.

Our current assays and our planned future assays focus on key solid tumor indications utilizing our Target-Selector^TM liquid biopsy technology platform for the biomarker analysis of CTCs and ctDNA from a standard blood sample. Our patented Target-Selector™ CTC platform assays are based on an internally developed microfluidics-based cell capture and analysis platform, with enabling features that change how information provided by CTC testing is used by clinicians. In January 2020, we announced that our molecular and CTC technologies were validated on cerebral spinal fluid, or CSF, in order to provide information for patients with central nervous system, or CNS, tumors both primary and metastatic. Our patented Target-Selector™ molecular technology enables detection of mutations and genome alterations with enhanced sensitivity and specificity, and is applicable to nucleic acid from ctDNA, and could potentially be validated for other sample types such as bone marrow, or tissue (surgical resections and/or biopsies). Our Target-Selector™ CTC and molecular platforms provide both biomarker detection as well as monitoring capabilities and require only a patient blood sample. In January 2019, we began offering research use only, or RUO, liquid biopsy kits containing our patented and proprietary Target Selector^TM testing to laboratories and researchers worldwide.

At our corporate headquarters facility located in San Diego, California, we operate a clinical laboratory that is certified under the Clinical Laboratory Improvement Amendments of 1988, or CLIA, and accredited by the College of American Pathologists, or CAP. We also performed the research and development that led to our current assays, and continue to perform for our planned assays, at this same facility. In addition, we currently manufacture our microfluidic channels and various chemistries utilized in our testing process, however, we have identified and have been working with a manufacturer to outsource certain manufacturing activities in the near term to reduce costs and improve efficiency. The assays we offer and intend to offer are classified as laboratory developed tests, or LDTs, under CLIA regulations. CLIA certification is required before any clinical laboratory, including ours, may perform testing on human specimens for the purpose of obtaining information for the diagnosis, prevention, or treatment of disease or the assessment of health. In addition, we participate in and have received CAP accreditation, which includes rigorous bi-annual laboratory inspections and requires adherence to specific quality standards.

Our primary sales strategy is to engage medical oncologists and other physicians in the United States at private and group practices, hospitals, laboratories and cancer centers. In addition, we market our clinical trial and research services to pharmaceutical and biopharmaceutical companies and clinical research organizations. Additionally, our pathology partnership program, branded as Empower TC^TM, provides the unique ability for pathologists to participate in the interpretation of liquid biopsy results and is available to pathology practices and hospital systems throughout the United States. Further, sales to laboratory supply distributors of our patented blood collection tubes, or BCTs, commenced in June 2018, which allow for the intact transport of liquid biopsy samples for research use only from regions around the world.

Our revenue generating efforts are focused in three areas:

• providing laboratory services to medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians who use the biomarker information we provide in order to determine the best treatment plan for their patients;

• providing laboratory services utilizing both our CTC and ctDNA testing in order to help pharmaceutical and biopharmaceutical companies developing drug candidate therapies to treat cancer; and

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• licensing and/or selling our proprietary testing and/or technologies, including our BCTs, to partners in the United States and abroad.

We plan to grow our business by directly offering medical oncologists, surgical oncologists, pulmonologists, pathologists and other physicians our Target-Selector™ liquid biopsy CTC and molecular assays. Based on our product development data, as well as discussions with our collaborators, we believe that our planned future assays should provide important information and clinical value to physicians. In particular, CTC and ctDNA assays could deliver important, actionable information not provided by other assays. For example, the historic clinical CTC test is the United States Food and Drug Administration, or FDA, approved CellSearch^® test, which provides CTC enumeration, but is not FDA approved to perform biomarker analysis. We believe our ability to rapidly translate research insights about the utility of cytogenetic, immunocytochemical and molecular biomarkers to provide information to medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians for treatment decisions in the clinical setting will improve patient treatment and management, and that these assays will become a key component of the standard of care for personalized cancer treatment.

Market Overview

Cancer Market Overview

Despite many advances in the treatment of cancer, it remains one of the greatest areas of unmet medical need. According to the World Cancer Report 2020, cancers figure among the leading causes of morbidity and mortality worldwide, and according to the World Health Organization, there were approximately 18.1 million new cases and 9.6 million cancer related deaths in 2018. The number of new cases is also expected to rise by approximately 70% over the next two decades. According to the World Health Organization, the most common causes of cancer death are cancers of the lung (21%), liver (10%), colon (9%), stomach (9%), and breast (7%). The incidence of, and deaths caused by, the major cancers are staggering, with over 3.9 million patients who have had a diagnosis of these cancers and are either living with these diseases and are undergoing treatment or are being monitored. For example, in breast cancer, many women have been deemed cancer-free, but continue to undergo periodic monitoring to assure there has been no disease recurrence. Our commercialized assays and our other planned future assays only require a readily accessible standard blood sample and thus may be used to help manage these patients, including supporting the selection of appropriate treatment, at multiple time points during the course of their disease. Because our assays require only a standard blood sample, they can be particularly useful when there is no currently available biopsy or surgical material, as is often the case in lung cancer, even at the time of initial evaluation. This is also the case with breast and lung cancers once surgical resection of the tumor has taken place and treatment has been initiated. Patients with breast and lung cancer must often undergo surgical resection of their primary tumor as part of their treatment. Therefore, at the time of progression or recurrence there may be no ability to obtain a tissue biopsy. Additionally, many studies have shown that most tumors mutate during treatment and as the disease progresses, so information from the initial tumor tissue may not be relevant. Again, a significant benefit of our technology is that it allows physicians to assess the current status of the tumors on a real-time basis utilizing a standard blood sample or liquid biopsy.

The following data published by the National Cancer Institute and American Cancer Society’s shows estimated new cases and deaths for 2019, and prevalence in 2019, in the United States for the major solid cancer types:

Cancer Type	Est. Incidence (New Cases/Year- 2019)		Est. Mortality (Deaths/Year-2019)		Est. Prevalence (Diagnosed and Alive as of 2019)*
Bladder		80,470		17,670		624,490
Breast		271,270		42,260		3,861,520
Cervical		13,170		4,250		283,120
Colorectal		145,660		51,020		1,544,770
Uterine/Cervix		61,380		10,920	283,120
Renal/Pelvis		73,820		14,770	569,570
Lung		228,150		142,620		571,340
Melanoma		96,480		7,239		2,028,750
Ovarian		22,530		15,082		249,230
Pancreatic		56,770		45,790		68,615
Prostate		174,650		31,620		3,650,030
Thyroid		52,070		2,170		705,050

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* American Cancer Society’s Cancer Treatment & Survivorship Facts & Figures 2019-2021

In addition to the human toll, the financial cost of cancer is overwhelming. An independent study published in 2010 and conducted jointly by the WHO ranked cancer as the most economically devastating cause of death in the world - estimated to be as high as $1.14 trillion globally. According to the National Cancer Institute, the direct cost of cancer care in the United States 2030 is forecasted to be $158 billion.

Cancer is a Heterogeneous Disease

Cancer constitutes a heterogeneous class of diseases, characterized by uncontrolled cell growth that results from a combination of both environmental and hereditary risk factors. Many different tissue types can become malignant, such as breast, lung, liver, and skin, and even within a particular tumor there is heterogeneity, with certain cancer cells in a patient bearing specific cellular or genetic biomarkers which others lack. Only in recent years has technology progressed sufficiently to enable researchers to understand many cancers at a cellular and molecular level, attribute specific cancers to associated genetic changes, and determine the extent to which these changes are seen in a patient’s tumor.

Cancer cells contain genetic alterations compared to normal human cells. Common genetic abnormalities correlated to cancer include gains or losses of genetic material on specific chromosomal regions, or loci, or changes in specific genes, or mutations, which ultimately result in detrimental cellular changes followed by cancerous or pre-cancerous conditions. For example, multiple gains or losses on various chromosomes, and the rearrangement of genetic material among chromosomes, or chromosomal translocations, have been observed in different cancer types, such as HER2 in breast cancer and ALK rearrangements in NSCLC. In addition, mutations within gene sequences, or single nucleotide variations, can give rise to aberrant proteins that do not perform their functions correctly, leading to uncontrolled cell growth. Such genetic alterations can be a result of multiple factors, including genetic predisposition, environmental or lifestyle factors or viral infections. Importantly, these genetic changes or aberrant proteins can be used as biomarkers to help guide appropriate treatment. Detecting these biomarkers, particularly those representing drug targets, or those indicative of responsiveness or resistance of a tumor’s cells to specific therapies, helps clinicians to select drugs, design treatment regimens and optimize patient care and management. Assays that provide such predictive information have the potential to dramatically improve treatment outcomes for patients suffering from cancer.

Limitations of Traditional Cancer Diagnostic and Profiling Approaches

Cancer is difficult to diagnose and manage due to its heterogeneity at morphologic, genetic and clinical levels. Traditional methods of diagnosis for solid tumors, routinely used as the initial step in cancer detection, involve a tissue biopsy followed by a pathologist examining a thin slice of potentially cancerous tissue under a microscope. A recently obtained tissue sample is used in combination with chemical staining techniques to enable analysis of the biopsy. After staining, the pathologist determines through visual inspection whether the biopsy contains normal or cancerous cells, with those that are deemed cancerous being graded on a level of aggressiveness. Often an analysis of biomarkers relevant to that tumor type is also performed on the tissue, ranging from IHC to FISH, to mutation analysis by various means such as microarrays and sequencing. After the diagnosis, a clinical workup is performed according to established guidelines for the specific cancer type. From there, the physician determines the stage of progression of the cancer based on a series of clinical measures, such as size, grade, metastasis risk, symptoms and patient history, and decides on a treatment plan that may include surgery, watchful waiting, radiation, chemotherapy, or stem cell transplantation.

This type of analysis is dependent on the availability of a recently obtained tissue biopsy for the pathologist to analyze. Such a biopsy is often not available. A tumor may not be readily accessible for biopsy, a patient’s condition may be such that a biopsy is not advised, and for routine periodic patient monitoring to evaluate potential progression or recurrence, a biopsy is a fairly invasive procedure and not typically performed. As the length of time between when the original biopsy, diagnosis or surgery is conducted to the current evaluation of the patient increases, the likelihood that an original biopsy specimen is truly representative of the current disease condition declines, as does the usefulness of the original biopsy for making treatment decisions. This risk intensifies in situations where a drug therapy is being administered, because the drug can put selective pressure on the tumor cells to adapt and change.

Similarly, the heterogeneity referred to above means that different parts or areas of the same tumor can have different molecular features or properties. In evaluating a biopsy specimen, the pathologist will take a few thin slices of the tumor for microscopic review rather than exhaustively analyzing the whole tumor mass. The pathologist can only report on the tumor

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sections analyzed and if other parts of the tumor have different features, such as biomarkers corresponding to specific treatments, they can be missed. A more representative analysis of the entire tumor, as well as any metastases if they are present, is very helpful.

CTCs, ctDNA and Cancer

CTCs are cancer cells that have detached from the tumor matrix and entered the patient’s blood or other bodily fluids. These cells are representative of the tumor and its metastases and can function as their surrogates. Testing CTCs can complement pathologic information drawn from a biopsy or resected tissue sample, helping to ensure that the analysis is comprehensive and not biased by tumor heterogeneity and sampling issues. They can also provide critical data when a biopsy is not possible. Clinical studies have demonstrated that the presence and number of CTCs provides information on the likely course of certain types of disease for the cancer patient, or in other words they are considered “prognostic.” Since CTCs are representative of the tumor, they can also be used for biomarker analysis, such as helping to guide therapy selection. Such analyses are “predictive” in that they offer insight into the likely responsiveness or resistance to particular therapies. After surgery and during any subsequent therapy or monitoring period, blood samples can periodically be drawn in a standard manner and analyzed to evaluate a therapy’s continuing effectiveness, as well as to detect other biomarkers such as new genetic mutations that may arise as a result of selection pressure by a particular therapy or by chance. Physicians can use this information to determine which therapy is most likely to benefit their patients at particular times through the course of their disease. Treatment decisions based on patient-specific information are the foundation of personalized medicine, and assays that guide a physician in the selection of individualized therapy for a patient are termed “predictive assays.”

ctDNA is nucleic acid that is released into blood by dying tumor cells. Cell death occurs in all tissues, especially those that are rapidly dividing, and in cancer, where cell growth is not only rapid but also uncontrolled. Parts of tumors often outgrow their blood supply, resulting in cell death. Tumor cells dying as a result of therapy also release nucleic acid into blood. As a consequence, ctDNA is common in cancer patients and scientists believe that like CTCs, it may be more representative of a patient’s entire tumor than a few thin sections from a tissue biopsy, thus reducing the heterogeneity problem. ctDNA is found in the plasma component of blood and is readily accessible in a standard blood sample. Analyzing ctDNA for mutations that are used as biomarkers for therapy selection shows great promise. One of the strengths of this approach, in addition to not requiring a tissue biopsy, is that it is not dependent on capturing rare tumor cells from blood to provide a sample for testing. The difficulty with this approach is that the cellular context is lost since the ctDNA is mixed with a much larger amount of circulating DNA from normal cells that are continuously dying and being replaced in the body, thus making analysis challenging. This requires a mutation detection methodology with enhanced sensitivity and specificity, to distinguish mutations in particular gene regions in cancer cells from the normal gene sequence present in those same genes in normal cells which co-exist in blood as normal cells die and are replaced in the body. Our Target-Selector™ technology provides this necessary sensitivity and specificity and creates an opportunity for ctDNA analysis to complement CTC analysis, or potentially to serve as the platform for stand-alone assays.

Given the incidence of cancer in the United States, with an estimated 1,800,000 new cases in 2019 for the major solid tumors targeted by our planned future assay products, the markets for our current and planned future cancer diagnostic assays are very large. Furthermore, these market opportunities are even greater due to the benefits of CTC and ctDNA testing, including not only the ability to offer physicians a simple way to augment an initial tumor biopsy analysis but also to provide a means for relatively frequent monitoring of the tumor’s molecular status, utilizing a standard blood sample as a “liquid biopsy.” The latter application enables the physician to determine if or how a tumor is changing over time or is responding to therapy and what the next treatment should be. For example, in the United States, the incidence of new cases of breast cancer alone is estimated to be over 271,000 in 2019, and the prevalence of this disease is over 2.8 million (the number of women with a history of breast cancer in the United States, including women being treated and women who have finished treatment), with an estimated 330,000 lumpectomies performed annually in the United States. Of these lumpectomies, 20% need to be repeated because on pathological examination it is shown the procedure did not result in “clean margins,” thus suggesting the entire tumor was not removed, according to a Johns Hopkins report. If a CTC assay were performed at the time of initial diagnosis, at the time of surgery, or in lieu of, or as an adjunct to, a PET/CT scan (as a CTC assay has the potential to identify a single tumor cell in a blood sample, while a scan requires a tumor mass of millions of cells to be detectable), to monitor disease progression or test for recurrence, thousands of assays, in breast cancer alone, could be performed per year with still relatively low market penetration.

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Use of CTC- and ctDNA-Derived Biomarker Data in Cancer Treatment

CTCs and ctDNA are derived from, and are understood to be representative of, a solid tumor and its metastases and can be analyzed as adjuncts to or in place of the tumor, especially when a recent tumor biopsy is not available. This is also referred to as a liquid biopsy. In theory, almost any analysis that can be performed on tumor tissue can also be performed on CTCs, while ctDNA, because it is only nucleic acid, is more limited. We have focused our analysis of CTCs and ctDNA on known biomarkers associated with specific therapies to support treatment decisions and therapy selection made by physicians. The biomarkers we analyze consist of proteins or protein modifications that can be identified by immunocytochemical means, cytogenetic or chromosomal aberrations, which are detected by FISH. Gene expression changes or molecular alterations in CTCs or ctDNA are often detected by molecular diagnostic assays, including Target-Selector™ techniques (ICC/FISH) and gene sequencing. Specific examples include (i) for ICC, the detection of the estrogen receptor protein in breast cancer, indicative of the likely responsiveness to hormonal therapies like tamoxifen, often sold under the trade name Nolvadex^®, (ii) for FISH, the presence of an amplified HER2 gene in breast cancer, indicative of the likely responsiveness to HER2-targeted agents like trastuzumab, often sold under the trade name Herceptin^®, and (iii) for mutation detection, the presence of an EGFR activating mutation in NSCLC like L858R, indicative of the likely responsiveness to EGFR-targeted agents like Tarceva^®. All of these biomarkers are currently tested on tumor tissue and can be tested on CTCs, and in the latter case on ctDNA. The resulting information could then be used to guide patient care, and specifically treatment selection.

To date, these types of molecular and genetic detection methods have been successfully utilized to provide predictive information for several cancers including breast, colon, NSCLC, melanoma and others in the form of companion diagnostics, typically performed on tumor tissue. CTC and ctDNA assays, which analyze the same biomarkers in a more convenient standard blood sample test that also permits periodic monitoring, could be used in the same way.

Our Business Strategy

We provide medical oncologists, surgical oncologists, pulmonologists, urologists, integrated oncologists, naturopathic doctors, pathologists and other physicians with a means to profile and characterize the genomic alterations of their patients’ tumors by analyzing CTCs and ctDNA found in standard blood draws. Biomarkers are currently detected and analyzed primarily in tissue biopsy specimens. We believe that our technology, which not only provides information on CTC enumeration but also the assessment of treatment-associated biomarkers identified within the CTCs or in ctDNA, will provide information to physicians that improves patient treatment and management and will become a key component of the standard of care for personalized cancer treatment.

Our approach is to develop and commercialize CTC and ctDNA assays and services that enable us to offer standard blood sample based, real-time testing solutions for a range of solid tumor types to oncologists that improve patient treatment with better prognostic and predictive tools. To achieve this, we intend to:

• Develop and commercialize a portfolio of proprietary CTC and ctDNA assays to enable physicians to develop personalized treatment plans. We intend to continue the development of additional assays and to provide information that is essential to personalized cancer treatment. By including predictive information on biomarkers associated with specific therapies in our analysis in addition to CTC enumeration, our assays are designed to provide a more complete profile of a patient’s disease than existing CTC tests. The biomarker information will assist physicians in selecting appropriate therapies for individual patients. Our ctDNA assays are expected to offer enhanced sensitivity and specificity based on the Target-Selector™ technology, enabling earlier detection of therapy-associated mutation targets or resistance markers, to support treatment decisions. We have launched our Target-Selector™ offering in a number of key indications such as breast cancer, lung cancer, gastric cancer, colorectal cancer, and prostate cancer, which are performed in our CLIA-accredited testing facility. We plan to perform the necessary validation studies to allow us to commercialize these assays through our clinical laboratory.

• Scale our sales and marketing capabilities. Our direct sales force with specialized experience in cancer diagnostic testing focuses on key identified territories in order to provide geographic coverage throughout the United States. At December 31, 2019, we had 10 sales representatives, and depending on our assay volume, potentially grow this number to 20 to 25 sales representatives.  This team will educate physicians directly on the benefits of our assays and the clinical data supporting them, as well as provide support to and serve as technical specialists for our partners. In addition to our internal efforts, we are actively seeking commercial partnerships that can increase our market reach.

• Develop and expand our collaborations with leading university hospitals and research centers. We collaborate with key thought leaders, physicians and clinical researchers, including those at Sarah Cannon Research Institute, University of Colorado, the University of California, San Diego, the John Wayne Cancer Institute, Columbia University, Johns

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Hopkins Medical Institute, MD Anderson Cancer Center, Dana Farber Cancer Center, St Luke’s Health System, Vanderbilt University, University of Texas Southwestern Medical Center, and Georgetown University. Our collaborations enable us to test new technologies, validate the effectiveness and utility of our planned future assays in a clinical setting and provide us access to clinically well-characterized and highly annotated patient data. These samples and data accelerate our validation process and facilitate the testing and refinement of our planned new assays.

• Enhance our efforts in reaching and educating medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians about CTC and ctDNA assays. According to the State of Cancer Care in America 2014 Report, published in the Journal of Oncology Practice in March 2014, there were approximately 13,400 medical oncologists in the United States or 16,500 if gynecologic and pediatric oncologists are included. With the support of our key thought leader collaborators, we intend to focus on medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians who treat cancer patients by targeting our sales and marketing efforts on this important customer segment. We believe this will expand and optimize the oncology testing services and personalization of cancer treatment provided by medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians so that they can better serve their cancer patients.

• Increase our efforts to provide biopharmaceutical companies and clinical research organizations with our current and planned CTC and ctDNA assays and services. In an effort to improve the outcome of clinical trials for oncology drugs, and more rapidly advance targeted therapeutics, pharmaceutical and biopharmaceutical companies are increasingly looking to companies that have cancer diagnostic assays that specifically address their needs, including the ability to characterize and monitor a patient’s tumor over time using CTC and ctDNA assays to analyze biomarkers of interest. There are over 5,000 active trials in the United States in breast, lung, colorectal, prostate and gastric cancers and melanoma according to clinicaltrials.gov. We expect to increase our sales and marketing focus in this business as well as seek additional collaborations and partnerships with diagnostic, pharmaceutical and biopharmaceutical companies.

• Become an enabling technology to cancer targeted therapies. Biopharmaceutical companies will increasingly focus on the personalized cancer diagnostic sector as the potential and prevalence of molecularly targeted oncology therapies approved by the FDA along with companion diagnostics increases. As targeted therapies move into their next phase, the market is beginning to see next generation of drugs such as Astra Zeneca’s Tagrisso (Osimertinib) that work after a patient on targeted therapy begin to progress and show a resistance mechanism that is identifiable / targetable, in this case a mutation in EGFR known as T790M. With these drugs, the original biopsy tissue would not show the resistance mechanism, so the patient must either undergo a re-biopsy procedure. In many cases re-biopsy is not medically feasible and liquid biopsy offers a more cost effective and safer alternative in this application. Another area of interest for the pharmaceutical industry is in immuno-oncology. This is the challenge of helping the body to counter the cancer cell’s ability to evade the immune system. Several protein-based tests are being developed in tissue to work as complimentary or companion diagnostics to these new and promising drugs, but the use of these tests will be limited as a result of limitations of tissue biopsies. Our solution is to test for these proteins with a liquid biopsy-based CTC test rather than relying on tissue biopsies.

• Conduct additional clinical studies with our current CTC and ctDNA assays and assays we plan to introduce in various cancer types. Clinical utility and validation studies for our planned ctDNA assays may rely on archived plasma or blood samples from clinical trials in which patient outcomes are already available, in a retrospective-prospective design that significantly shortens the length of such studies.

• Continue to enhance our current and planned future CTC and ctDNA assays and reduce the costs associated with providing them through internal research and development and partnering with leading technology developers and reagent suppliers. We intend to work closely with select key technology developers and suppliers to further automate the optical interpretation of our current assays and our planned additional CTC assays, including enumeration, immunocytochemical biomarker staining and FISH. We have and currently utilize an automation system that significantly reduces the hands-on time of our cytogenetic technologists for microfluidic channel analysis while increasing the uniformity of the data we generate. This system is also expected to provide the ability to evaluate multiple fluorescent signals of different wavelengths simultaneously for multiplexed analysis, further enhancing efficiency.

Our Competitive Advantages

We believe that the competitive advantages of our molecular assays, including our assays which are still under development, would include the following.

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Our current Target-Selector molecular assays enable, and we anticipate our planned future CTC and ctDNA assays will each enable, detailed analysis of a patient’s cancer utilizing a standard blood sample, facilitating testing at any time, including when a biopsy is not available or inconclusive, offering real-time monitoring of the cancer and the response of the cancer therapy, and allowing medical oncologists, surgical oncologists, pulmonologists, urologists, integrative oncologists, naturopathic doctors and  pathologists and other physicians to select timely modifications to treatment regimens. Because CTCs and ctDNA are derived from the primary tumor or its metastases, they function as surrogates for the tumor, with the advantage of being readily accessible in a standard blood sample. This is especially important in situations where a biopsy is not available or advised. The simplicity of obtaining a standard blood sample permits repeat testing in a monitoring mode to detect recurrence or progression and to offer information on treatment modifications based on a current assessment of the cancer’s properties. A key advantage to using Biocept is our ability to interrogate both CTC and ctDNA biomarker targets.

Our current Target-Selector assays each provide and we anticipate our planned future assays will each provide more information than competitors’ existing tests, as a result of being able to provide biomarker results for both ctDNA and CTCs. We anticipate that such additional biomarker information will enable a physician to develop a personalized treatment plan. By including biomarker information in our analysis, in addition to CTC enumeration, our current assays and our planned future assays are designed to provide a more complete profile of a patient’s disease than existing CTC or ctDNA. We intend for our assays to contain actionable information to assist physicians in selecting appropriate therapies for individual patients. Our ctDNA assays are expected to offer enhanced sensitivity and specificity based on our patented technology, enabling earlier detection of therapy-associated mutation targets or resistance markers, again supporting treatment decisions.

Our current Target-Selector and our planned future assays are designed to capture and detect a broader range of CTCs than existing tests and to be applicable to, or quickly modifiable for, a wide range of cancer types. Our antibody capture cocktail includes antibodies targeting not only EpCAM, the traditional epithelial CTC capture antigen utilized in the CellSearch^® system and in other platforms, but also other epithelial antigens as well as mesenchymal and cancer stem cell antigens, indicative of cells having undergone the epithelial-to-mesenchymal transition. These cells may be more relevant for metastasis. Our detection methods include cytokeratin staining with a broader range of cytokeratin isotypes than existing CTC tests, and we have introduced additional staining which would enable detection of cells specifically captured with our antibody cocktail, including EMT cells lacking cytokeratin. We believe that through our enhanced staining, more CTCs and different types of CTCs will be able to be identified and potentially at earlier stages of disease, resulting in fewer non-informative cases and more information for physicians.

Our current and planned CTC and ctDNA Target-Selector assays will be flexible and readily configurable to accommodate new biomarkers with clinical relevance as they are identified. In theory, our platforms permit essentially any analysis that is currently performed on tumor tissue to be performed on CTCs, including immunocytochemical staining, FISH and molecular analysis. As new therapies are approved, and to the extent that they are targeted therapies for which knowledge of a particular gene amplification event, mutation or presence, absence or modification, such as phosphorylation, of a protein are indicative of likely response or resistance to that therapy, we will be able to include them in our assays with minimal changes. This is attractive to pharmaceutical and biotechnology companies that are developing such therapies or seeking ways to make their clinical trials more efficient, as this flexibility enables them to focus on patients more likely to respond to a particular therapy and demonstrate a benefit from that therapy.

Collaborative relationships with physicians at MD Anderson Cancer Center, Yale University, Oregon Health Sciences University, Sarah Cannon Research Institute, University of Colorado, the University of California, San Diego, the University of Minnesota, the John Wayne Cancer Institute, Columbia University, Johns Hopkins Medical Institute, Vanderbilt University, University of Texas Southwestern Medical Center,, St. Luke’s Cancer Center, and Georgetown University. We have worked closely with a number of physicians at institutions on various collaborative projects in different cancer types including breast, NSCLC, prostate, colorectal, ovarian, bladder and endometrial. These projects provide us access to leading researchers, clinicians and key thought leaders, access to valuable patient samples and insight into clinical applications for our assays. Some of these projects have resulted in publications in leading journals, such as Cancer Discovery and Cancer Medicine, which enhances our standing in the oncology community and supports our marketing efforts.

Our planned Target-Selector mutation assays would not be platform dependent. These assays are being designed to be able to be performed on almost any molecular instrument, which will provide flexibility in laboratory operations. To the extent we elect to develop these assays as IVDs, including by pursuing CE marks for such assays to be marketed outside the United States, the ability to rapidly deploy them on different approved instrument platforms already in many laboratories should greatly simplify their distribution and commercialization.

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Our Assays, Products and Services

Assays, Products and Services

We currently offer and conduct our commercialized diagnostic assays and offer our clinical trial services at our CLIA-certified, CAP-accredited and state-licensed laboratory. We have commercialized our Target-Selector™ assays for a number of solid tumor indications such as: breast cancer, NSCLC, gastric cancer, colorectal cancer, prostate cancer, pancreaticobiliary cancer, and ovarian cancer. These assays utilize our dual CTC and ctDNA technology platforms and provide biomarker analysis from a patient’s blood sample.

Our current assays and clinical trial services include:

• CTC and ctDNA Testing. Our current assays and our other planned cancer diagnostic assays are based on our Target-Selector™ technologies and are currently intended to be performed only in our clinical laboratory. After completing testing, we or our partners provide our customers with an easy to understand report that describes the results of the analyses performed, which is designed to help medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians make better decisions about the treatment of their patients.

• Clinical Trial Services. We plan to utilize our clinical laboratory and translational research capabilities to provide clinical trial and research services to pharmaceutical and biopharmaceutical companies and clinical research organizations to improve the efficiency and economic viability of their clinical studies. Our clinical studies and translational research services could leverage our knowledge of CTCs and ctDNA and our ability to develop and implement new cytogenetic, immunocytochemical and molecular diagnostic assays. Our current assays can, and our other planned cancer diagnostic assays and biomarker assays are anticipated to be able to, help optimize clinical trial patient selectionand/or monitor cancer drivers during the course of treatment or disease progression. Demonstration of clinical utility of our assays would more easily enable these tests to be adopted in standard clinical practice, helping physicians select the most appropriate therapy for their patients.

In the case of our breast and gastric cancer offerings, biomarker analysis involves fluorescence in situ hybridization, or FISH, for the detection and quantitation of the human epidermal growth factor receptor 2, or HER2, gene copy number as well as immunocytochemical, or ICC, analysis of estrogen receptor, or ER, protein, progesterone receptor, or PR, protein, and androgen receptor, or AR, protein in breast cancer; all of these test are currently available commercially. We have also validated and offer a Next Generation sequencing assay for use in breast cancer. A patient’s HER2 status provides the physician with information about the appropriateness of therapies such as Herceptin^® or Tykerb^®. ER and PR status provides the physician with information about the appropriateness of endocrine therapies such as tamoxifen and aromatase inhibitors.

Our lung cancer biomarker analysis offering currently includes FISH testing for ALK, ROS1, RET, MET and FGFR1 gene rearrangements, as well as analysis for the T790M, Deletion 19, and L858R mutations of the epidermal growth factor receptor, or EGFR gene, as well as BRAF and KRAS. The L858R mutation of the EGFR gene and Exon 19 deletions as activators of EGFR kinase activity.  For lung cancer, we also offer a resistance profile assay consisting of the biomarkers MET, HER2 (both of which we perform using our technology for CTCs), KRAS, and T790M (both of which are performed using ctDNA in plasma). These assays can be used by physicians to identify the mechanism causing disease progression for patients with NSCLC who are being treated with tyrosine kinase inhibitor, or TKI, therapy and therefore may qualify patients for inclusion in a clinical trial. We have also validated and offer a Next Generation sequencing assay for use in NSCLC.

Fibroblast growth receptor 1, or FGFR1, amplification is offered using our CTC technology. FGFR1 is present in several tumor types, including both NSCLC and small cell lung cancer, or SCLC, and has been shown to be a prognostic indicator of progression. FGFR1 is also a key target for several drugs undergoing clinical development.

We analytically validated PD-L1 testing utilizing our CTC technology in 2016. PD-L1 is a biomarker that is informative for immuno-oncology therapies currently marketed for lung cancer and melanoma, as well as therapies in development for multiple tumor types. We collaborated with David Rimm, M.D., Ph.D., a pathologist at Yale Medical School and a scientific advisor to us, on the analytical development of this assay.

We plan to release additional blood-based biomarker assays, such as those that test for ESR1, to our current menu of liquid biopsy assays using blood samples. In addition, we plan to complete the development and offer multiplexed biomarker tests, which will allow the detection and quantitative monitoring of multiple biomarkers in a single assay.

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In August 2017, we announced that we had executed a distribution agreement for our proprietary blood collection tubes with VWR International, LLC which can preserve intact cells (such as CTCs) for up to 96 hours and ctDNA for up to 8 days, allowing for the intact transport of RUO liquid biopsy samples from regions around the world.

In October 2017, we launched our pathology partnership initiative, branded as Empower TC, expanding access of our proprietary liquid biopsy testing to community pathologists and hospitals throughout the United States. The aim of this program is to incorporate community pathologists into the review of biomarkers found in liquid biopsy for patients diagnosed with cancer. Pathologists are now enabled to interpret our liquid biopsy results locally, while patient specimens will continue to be sent to us for processing in our CLIA-certified, CAP-accredited high complexity laboratory. In February 2019 we launched Version 2 of Empower TC which is intended to expand the capabilities of the program to allow for more tests to be interpreted by local pathologists.

We intend to continue to commercialize cancer diagnostic assays in the United States as LDTs performed in our CLIA-certified, CAP-accredited, and state-licensed laboratory. We plan to evaluate potential opportunities for the commercialization of our products in other countries. We believe the Target-Selector™ technology can be used for molecular biomarker screening, marked as RUO test kits.

We launched the first of our RUO Target Selector kit products, ctDNA EGFR, in January 2019. Additionally, we plan to evaluate opportunities for licensing of our products and proprietary technologies to partners in the United States and abroad.

In December 2018, we entered into a Software License and Laboratory Data Supply Agreement with Prognos, Inc., an innovator in predicting disease by applying artificial intelligence, or AI, to clinical laboratory diagnostics. Under the agreement, we will supply de-identified data from its liquid biopsy testing to Prognos, which will leverage its AI capabilities to help its pharmaceutical clients ensure that the right patients receive the right therapies. This agreement could provide revenue sharing opportunities in future periods.

In May 2019 we announced launch of the Oncomine NGS lung cancer panel in collaboration with Thermo Fisher Scientific. This panel requires a local coverage determination, or LCD, for reimbursement and we started that process with a meeting with MOLDx in November 2018. In the absence of a national coverage policy, an item or service may be covered at the discretion of the Medicare contractors based on an LCD.  We have applied for LCD’s in several categories as the initial step for national coverage.

In June 2019 we announced launch of the Oncomine NGS breast cancer panel, a multi-gene liquid biopsy panel specifically developed for breast cancer, in collaboration with Thermo Fisher Scientific. This panel is being marketed to physicians and researches for the detection and monitoring of actionable genomic biomarkers associated with breast cancer.

In November 2019 we announced launch of our liquid biopsy test to detect TRK biomarkers in the blood of patients diagnosed with cancer.  Identification of TRK protein enables physicians to rapidly and cost-effectively identify the potential presence of NTRK fusions used to inform on treatment options.

We also expanded our prostate panel offerings as a key element for growing the demand for our testing among urologists, including the AR-V7 assay which helps physicians determine if patient should stay on hormone therapy or switch to chemotherapy, as well as PTEN, MET, MYC, and EGFR FISH assays which provide valuable prognostic information to the aggressiveness of a patient’s prostate cancer.

Pharmaceutical, Research and Health Economic Collaborations

We continue to execute on our strategies intended to expand our business globally, as well as to engage with pharmaceutical companies on clinical trials and assay development. We have preferred provider agreements in place in Mexico with Quest Diagnostics to support testing for Astra Zeneca. In addition, we have distribution agreements in place in Mexico, Uruguay, Turkey, Columbia, Israel and Canada.

As a follow up to the CTC findings published in Cancer Medicine, we were involved in a clinical study led by investigators at the Dana-Farber Cancer Institute. Study enrollment was completed. During the screening phase of this study, our CLIA-certified, CAP accredited laboratory tested blood samples from a cohort of patients with HER2 negative tissue status, with the

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aim to identify individuals with HER2 amplified CTCs. These patients were then assigned to chemotherapy plus Herceptin^®.  Additional CTC testing with HER2 FISH biomarker analyses were performed at subsequent time points. At the December 2014 San Antonio Breast Cancer Symposium, we presented findings of 311 patients tested with HER2 negative tissue status, where 22% had CTCs with HER2 gene amplification at disease progression.  HER2 gene amplification subsequently categorized these patients as potential candidates for anti-HER2 therapy as the cancer evolved. Moreover, our multi-antibody CTC capture method identified a substantial subset of patients who would not likely have had detectable CTCs with commonly used CTC capture technologies. This added 10% (included in the 22%) to the number of women who were candidates for this highly specific targeted therapy.

With our cooperation, researchers at Columbia University published a study in the journal Clinical and Translational Oncology in January 2015. The study demonstrated the high correlation (79%) of circulating tumor cells, primary tumor tissue biopsy and metastatic tumor tissue biopsy in the determination of hormone receptor status, or ER/PR, of breast cancer patients. The investigators also found that this high correlation was strongest when comparing metastatic tissue biopsy to CTCs (83%). The conclusion of the study was that determining ER/PR status in CTCs using our platform is feasible, with high concordance in ER/PR between tumor tissue (as determined with immunohistochemistry, or IHC) and CTCs (as determined with immunocytochemistry, or ICC). The authors suggest a larger trial to determine the prognostic significance of these findings.

In September 2015, we presented the clinical validation data of our ctDNA assay in collaboration with the University of California, San Diego.  The results demonstrated a very high level of concordance to tissue results (88%), together with >95% analytical sensitivity and 99% analytical specificity, supporting our offering of a validated, robust non-invasive solution for mutation identification and monitoring in patients with lung cancer. Subsequent FDA approval of Tagrisso^®, a third-generation tyrosine kinase inhibitor, presented an opportunity for patients to be monitored using a ctDNA assay.

During 2016, we announced a pharmaceutical collaboration agreement that provides testing for a clinical trial, which includes metastatic lung cancer patients with leptomeningeal or brain metastases. In this exploratory trial, we tested both cerebrospinal fluid and blood for molecular alterations that could be impacted by treatment. A second pharmaceutical collaboration was announced in 2016, which entails a milestone-based assay development project focused on hepatocellular carcinoma, or HCC, or liver cancer. Custom assays utilizing both our CTC and ctDNA technologies were developed for identifying specified biomarkers and capturing HCC CTCs for potential clinical trial use.

In April 2016, we announced a study collaboration with Dr. Giuseppe Giaccone at the MedStar Georgetown University Hospital to assess resistance biomarkers in non-small cell lung cancer, or NSCLC, patients treated with EGFR inhibitors or chemotherapy. Later in 2016, we announced another collaboration involving a study presented at the European Society for Medical Oncology, or ESMO, Annual Congress in October 2016, evaluating the detection of EGFR alterations (del19, L858R and T790M) by our Target-Selector™ liquid biopsy. Subsequent to this study, we have earned business in both Mexico and Columbia for EGFR gene mutation testing in blood to qualify patients for a pharmaceutical company’s targeted therapy. The relationship also resulted in a study initiated during the following year that includes peripheral blood CTC assessment of PD-L1 protein expression in patients undergoing chemotherapy as a monotherapy or in combination with a checkpoint inhibitor. In December 2016, we announced a clinical study agreement with Columbia University Medical Center to evaluate the clinical utility of our Target-Selector™ platform to diagnose leptomeningeal metastases, or LM, in breast cancer patients. This work was expanded in the fourth quarter of 2018 to include patients with other primary solid tumor types. Dr. Kevin Kalinsky leads this study to test CTCs in cerebrospinal fluid and blood, where CTC analysis will be compared to standard methods for confirming LM diagnosis.

In May 2017, we entered into a clinical study agreement with the University of Texas Southwestern Medical Center. Led by recognized oncologist and ALK alteration researcher, Dr. Saad Khan, the study is designed to evaluate the clinical utility of our Target-Selector™ platform for patients diagnosed with ALK-positive NSCLC and treated with ALK-inhibitor therapy. A second arm of the study evaluated patients with rare cancers such as anaplastic thyroid cancer to determine if genetic drivers such as ALK gene rearrangements can be identified and treated with targeted therapy to improve patient outcomes.

In November 2017, we announced a collaboration involving 100 patients in a clinical study with the University of California, San Diego. The study entails clinical validation of specified PD-L1 antibody clones on our Target-Selector™ CTC platform. Concordance of PD-L1 protein expression in tissue biopsy versus liquid biopsy, as well as correlation of therapeutic response with PD-L1 liquid biopsy status, are the study objectives.  

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Two complementary posters on the highly sensitive Target Selector ctDNA assays were presented in 2018. The first poster entitled “Biocept Study Shows Incorporation of Thermo Fisher QuantStudio 5 PCR Instrument into Target Selector Platform Improves Sensitivity and Specificity in Detection of Lung Cancer Biomarkers” was presented in January 2018 at the Fifth AACR-IASLC International Joint Conference: Lung Cancer Translational Science from the Bench to the Clinic. The related poster, entitled “Validation of highly sensitive TargetSelector™ ctDNA assays for EGFR, BRAF, and KRAS mutations” was presented at the April 2018 American Association for Cancer Research annual meeting. Together, these posters highlight improvements to the Target Selector ctDNA platform, enabling more sensitive mutation detection down to a single copy, thereby increasing the likelihood of identifying actionable molecular drivers towards guiding targeted therapy decisions and better management of a patient’s cancer.

In collaboration with Dr. Shilpa Gupta from the Masonic Cancer Center at the University of Minnesota, a poster was presented at the April 2018 American Association for Cancer Research annual meeting. The results demonstrated proof-of-concept use of our Target-Selector™ CTC platform, correlating CTC count with clinical responses in refractory testicular cancer patients undergoing therapy. This work is part of a Phase 2 clinical trial of brentuximab vedontin (an anti-CD-30 antibody) with bevacizumab in refractory CD-30 + germ cell tumors. The capability for our Target-Selector™ CTC platform to monitor this rare cancer type presents the potential for a precision medicine-based approach to guide treatment decisions for these patients.

During the first half of 2018, three key case studies were published in peer-reviewed journals. In April, the 2018 Spring issue of Oncology & Hematology Review featured a case report demonstrating the clinical utility of our CTC platform whereby identification of an ALK rearrangement enabled sequential targeted therapy and improved quality of life in a patient with NSCLC.  This case illustrated the use of our technology to monitor therapeutic response and early detection of drug resistance to manage patient disease through the course of treatment with various ALK inhibitors. A Letter to the Editor in the May 2018 issue of Journal of Thoracic Oncology described the identification of a ROS1 rearrangement by Biocept CTC analysis using FISH (fluorescent in situ hybridization). The ROS1 translocation was concordant with tissue biopsy. In contrast, next-generation sequencing analysis of plasma by another vendor failed to detect the genetic alteration in the patient with lung cancer. Also, in May 2018, a case report describing the application of our CTC technology in the management of metastatic breast cancer was published in Clinics in Oncology.  This work described a patient with recurrent breast cancer where numerous tissue-based evaluations of the individual’s bone-only metastases had repeated challenges or inclusive results.  HER2 amplification detected in CTCs from blood provided crucial information towards changing treatment strategies to include anti-HER therapy, consequently extending and improving the patient’s quality of life. Each of the three published cases provide real-life examples in lung and breast cancer towards establishing the importance of liquid biopsy to identify and monitor clinically actionable biomarkers to improve outcomes of patients with cancer.

In July 2018, we announced a collaboration involving two studies with the University of California, San Diego. Each of the two studies will enroll 100 patients with solid tumors, for a total of 200 patients. One study will assess the feasibility of using our CTC and ctDNA methodologies to predict post-resection disease recurrence in patients with Stage II or III cancer, and the other study will use our technology to predict response to therapy in patients with metastatic disease. Dr. Rebecca Shatsky and Dr. Razelle Kurzrock are the investigators key to both studies.   

In August 2018, we announced a Quality Improvement Initiative with Highmark Health to help improve molecular testing rates of NCCN Category I Guidelines for NSCLC. The Initiative aims to improve health outcomes by using liquid biopsy to more rapidly assess a patient's actionable biomarker status towards selecting appropriate therapy, while reducing the overall cost of care. The project will evaluate at least 100 patients in the Highmark Health-affiliated Allegheny Health Network, or AHN, Cancer Institute. Patients will receive our CTC and ctDNA testing in addition to tissue biopsy with the goal of obtaining biomarker status results for a higher percentage of patients compared to standard testing.

Two scientific posters featuring the Target Selector™ CTC and ctDNA platforms were presented in September 2018 at the International Association for the Study of Lung Cancer, or IASLC, 19^th World Conference on Lung Cancer. Data from these clinical studies demonstrate the ability of our technology to detect and monitor CTC counts and actionable biomarkers in both blood and cerebrospinal fluid, or CSF, of patients with advanced NSCLC. The first poster described interim results of a collaboration with Dr. Janakiraman Subramanian at the Saint Luke’s Cancer Institute in Kansas City, Missouri. This study evaluates CTC enumeration in advanced stage NSCLC patients before and during the course of chemotherapy. Interim data suggest that CTC counts may have prognostic and predictive potential to assess therapeutic benefit. The second poster was in collaboration with Kadmon Corporation, featuring CTC and ctDNA analyses and monitoring in the CSF of NSCLC patients with leptomeningeal metastases who were treated with tesevatib in Kadmon’s clinical trial KD019-206. In this study,

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alterations detected in the CSF of patients were concordant with original tissue biopsies, and serial monitoring of CTCs and ctDNA biomarkers in CSF were consistent with the overall clinical.

A case series was published in the January 2019 issue of the peer reviewed journal, Clinics in Oncology. The work highlights the clinical utility of liquid biopsy to stratify patients who may benefit from targeted therapy, describing three patients with metastatic NSCLC for whom tissue biopsy was insufficient for molecular profiling. In all three cases, our ctDNA liquid biopsy analyses detected an activating EGFR mutation. EGFR tyrosine kinase inhibitor therapy subsequently was initiated. Complete response lasting approximately two years was observed in one patient. For two patients, our ctDNA testing was performed at signs of clinical progression and Osimertinib was administered upon our liquid biopsy identification of the EGFR T790M resistance marker. In sum, patient survival was dramatically extended in all cases presented where targeted therapies were prescribed based on liquid biopsy results.

In April 2019, we presented a poster at the annual meeting of the American Association for Cancer Research. The work describes analytical validation of Target Selector ESR1 Next Generation Sequencing, or NGS, ctDNA assays with single copy mutant detection. The assays have a limit of detection, or LOD, 0.03% or better, with >99% sensitivity for mutant allele fractions, or MAF, ranging from greater than 5% down to 0.03%.  ESR1 gene mutations are associated with acquired drug resistance in up to 55% of patients with estrogen receptor, or ER, positive metastatic breast cancer, or mBC, who received anti-estrogen treatment. Detection of ESR1 mutations may enable the prediction of treatment failure and disease progression in these patients. As new therapies are developed that antagonize ER activity by mechanisms that differ from current drug treatments, ESR1 mutation testing can be a helpful tool to identify patients who may benefit from these alternative agents.

In October 2019 we announced the publication of a peer-reviewed journal article featuring the analytical validation results demonstrating the high sensitivity of our Target Selector^TM testing for EGFR, BRAF, and KRAS mutation in plasma circulating tumor DNA (ctDNA). The article was published in the journal, PLOS ONE, Volume 14, October 2019, and will also be included as part of a special collection of topical articles, entitled Targeted Anticancer Therapies And Precision Medicine In Cancer.

In November 2019 we presented clinical data highlighting performance of our Target Selector^TM tests and kits for detecting actionable oncology biomarkers at the 2019 Association for Molecular Pathology, or AMP, Annual Meeting held at the Baltimore Convention Center, in Baltimore, MD.  The content of our posters will be published in The Journal of Molecular Diagnostics.

In December 2019 we presented clinical data supporting the use of our Target Selector ^TM CTC platform as an aid in the monitoring and treatment of breast cancer in a poster session at the 2019 San Antonio Breast Cancer Symposium, or SABS. The data demonstrated the Target Selector^TM platform’s ability to accurately detect, enumerate, and interrogate circulating tumor cells, or CTCs, in a cohort of over 1,500 patients, representing various clinical and treatment stages of breast cancer.

Provider Agreements

In January 2017, we announced that we had secured an in-network provider agreement with Blue Cross Blue Shield of Texas, the largest provider of health benefits in Texas.In addition, we entered into a national master business agreement with the Blue Cross Blue Shield Association, a not-for-profit trade association that provides multiple services for its 38-member Blue Cross and Blue Shield health plan companies across the U.S., including forming national strategic vendor partnerships. We were selected by the Blue Cross Blue Shield Association based on a rigorous request-for-proposal progress. This agreement establishes pricing for our Target-Selector™ liquid biopsy testing service through the Blue Cross Blue Shield Association’s group purchasing organization, CareSourcing Workgroup. The pricing offered by the CareSourcing Workgroup group purchasing organization is available to those Blue Cross and Blue Shield member health plans that have, or may seek, in-network agreements with us.

In June 2017, we entered into a participating provider agreement with MediNcrease Health Plans, LLC and a preferred provider agreement with Scripps Health Plan Services, Inc., both establishing pricing for our Target-Selector™ liquid biopsy testing service.

In December 2017, we signed an agreement with Wellmark, Inc., the largest health insurer in Iowa and South Dakota. The agreement marks our third Blue Cross Blue Shield contract and enables patients diagnosed with cancer the ability to access our proprietary testing services in-network under their Wellmark health plan.

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In August 2018, we entered into a quality initiative program with Highmark and Alleghany Health Network as a result of the Caresourcing Workgroup. The focus is to improve access to molecular testing to members with a diagnosis of lung cancer. Enrollment began in August 2018 and has been steadily increasing.

In July 2019 we announced that we entered into a Laboratory Services Provider Agreement with Beacon Laboratory Benefit Solutions, Inc., a nationally recognized premier provider of laboratory benefit management technology solutions to health and managed care companies in the United States.

In February 2020 we announced that we entered into an agreement with a California-based independent physician association, or IPA, to provide our liquid biopsy testing services to physicians and patients in their network.  Our Target Selector^TM offering includes the choice of individual biomarker tests or a larger liquid biopsy panel, enabling physicians to select the best approach for each patient.

We are currently contracted with nine preferred provider organization networks, three large health plans, and five regional independent physician associations, and expect to continue to gain contracts in order to be considered as an “in-network” provider with additional plans.

Laboratory Testing

From our CLIA-certified laboratory in San Diego, California, we provide test results from our current and planned CTC and ctDNA assays to medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians in community hospitals, cancer centers, group practices and offices. At the federal level, clinical laboratories, such as ours, must be certified under CLIA in order for us to perform testing on human specimens. Our laboratory is also accredited by CAP, which is one of six accreditation organizations approved by the Centers for Medicare & Medicaid Services, or CMS, under CLIA. Our clinical laboratory is located in California and we hold the requisite license from the California Department of Public Health to operate our laboratory. In addition, we hold licenses issued by the states of Maryland, Pennsylvania and Rhode Island to test specimens from patients in those states or received from ordering physicians from those states. In addition, our clinical reference laboratory is required to be licensed on a product-specific basis by New York as an out of state laboratory and our products, as LDTs, must be approved by the New York State Department of Health before they are offered in New York. As part of this process, the State of New York requires validation of our assays. We currently do not have the necessary New York license, but we are in the process of addressing the requirements for licensure in New York.

Clinical Study Biomarker Testing Services

Industry research has revealed that many promising drugs have produced disappointing results in clinical trials. For example, a study by Princess Margaret Hospital in Toronto estimated that over a five-year study period 85% of the new therapies for solid tumors which were tested in early clinical trials in the United States, Europe and Japan failed, and that of those that survive through to Phase III trials, only a third will actually be approved. Given such a high failure rate of oncology drugs in clinical development, combined with constrained budgets for pharmaceutical and biopharmaceutical companies, there is a significant need for drug developers to utilize molecular diagnostics to help decrease these failure rates. For specific molecular-targeted therapeutics, the identification of appropriate biomarkers may help to optimize clinical trial patient selection and success rates by helping clinicians identify patients that are most likely to benefit from a therapy based on their individual genetic profile.

In addition to testing for physicians and their patients, we offer liquid biopsy testing services to help increase the efficiency and economic viability of biomarker analysis pertinent to clinical trials conducted by pharmaceutical and biopharmaceutical companies and clinical research organizations. Our liquid biopsy testing services are aimed at developing customizable assays and techniques utilizing CTC and ctDNA technologies to provide sensitive, real-time characterization of an individual patient’s tumors using a standard blood sample. These assays may be useful as, and ultimately developed into, companion diagnostics associated with a specific therapeutic. Additionally, through our services, we may gain further insights into biomarkers for disease progression and drug resistance, as well as those associated with current drug development efforts, which we can incorporate into assays.

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Assay Development Process

Our Target-Selector™ assays were, and our planned additional CTC and molecular assays are being, developed and validated in conjunction with leading academic and clinical research centers to ensure that the needs of the clinical community are being met with the latest research on key biomarkers that affect patient care. We utilize a research and validation process to help ensure that we are providing diagnostic, prognostic and predictive information that is clinically relevant and accurate. The time-frame for this process from design through development and market launch is dependent upon, among other things, the biomarkers in question having been discovered and validated before we incorporate them in an assay, the specific clinical claims we plan to pursue, and the availability of high-quality samples for validation. Our development protocol calls for us to monitor and review the process in four stages as detailed below:

• Stage 1, Research. We review known, validated biomarkers, preferably associated with a specific therapeutic or other high value treatment decision and discuss with clinical collaborators and key thought leaders to characterize the opportunity, the specific clinical setting and the product profile of the candidate assay.

• Stage 2, Assay Development. We design the assay, which typically has two parts: efficient capture of CTCs and/or isolation of ctDNA from the targeted cancer type and development of the biomarker assays that will be included. For example, the first part may involve modification of the antibody capture cocktail and the second could include development of specific Target-Selector™ mutation assays or testing of FISH probes. Assay development utilizes contrived analytical samples, normal control specimens and ultimately clinical samples to assure performance. The assay development process includes defining the performance characteristics of the assay as well as developing standard protocols for our CLIA-certified, CAP accredited, and state-licensed laboratory, where the assay will ultimately be performed. This assessment includes such features as accuracy, precision (inter-assay, intra-assay, inter-operator, inter-instrument, etc.), sensitivity, and specificity.

• Stage 3, Clinical Validation. When the assay is performing as desired it undergoes a rigorous validation process which includes both analytical and clinical validation. Clinical accuracy is performed and validated against an orthogonal reference for that biomarker, which is typically tumor tissue analysis. Depending on the tumor type and specimen requirement, samples are collected from patients through collaborators, or in the case of molecular assays, from commercial sample banks, where clinical information on the patients, including outcomes, is already available.  We create standard operating procedures, quality assurance and quality control measures to ensure reproducibility and high standards of quality.

• Stage 4, Availability for Commercialization. Upon the completion of clinical validation and before launch, we take several steps to prepare an assay for marketing as an LDT. We create standard operating procedures and quality assurance and quality control measures to ensure repeatability and high standards of quality. We train both our commercial and laboratory staff on the interpretation and use of the data. Licenses and approvals for our laboratory to perform or use LDTs have been obtained from the appropriate regulatory authorities, such as CMS, which oversees CLIA, and different state regulatory bodies.

We currently offer 23 assays that are available for clinical use that have completed all four stages of the development protocol. Other assays for both CTCs and molecular are in earlier stages of development. Markers for such assays include, but are not limited to, ESR1, PSA, CD68, NTRK2, NTRK3, MSI and a multiplexed assay.

We may be required to seek FDA clearance or approval to expand the commercial use of assays to other laboratories and testing sites in the United States. We may also need to complete additional activities to submit each of these assays for regulatory clearance or approval before commercialization in each of the international markets where introduction is planned.

If the FDA finalizes its current draft guidance on a risk-based framework for regulation of LDTs, our process would also need to allow for obtaining FDA review, clearance or approval, as applicable, which would add delay, expense and risk to our current assay development process. In November 2016, the FDA put the process to review and issue this guidance on hold and has not yet provided further information as to when the process will move forward.

Technology Development

In addition to developing new CTC and molecular assays for different cancers to be offered through our CLIA laboratory and adapting additional predictive biomarkers to these assays as their importance is demonstrated by the scientific and clinical research communities, we continue to focus on improving the base technologies underlying our assays and processes. We are

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exploring various ways to improve CTC capture efficiency and detection, as well as approaches to sub-categorize CTCs into different populations that may have clinical relevance. For example, by determining which antigens individual CTCs expressed that enabled their capture, we could differentiate, and enumerate, various CTC phenotypes, for example, epithelial versus mesenchymal. We are also working to simplify the assay process, and in general to provide a broader range of useful data on a patient’s cancer to assist the physician in determining an appropriate treatment. Some of these projects and initiatives include:

• Improve Ability to Capture CTCs

Continued modification and optimization of our microfluidic channel as a way to further enhance CTC capture efficiency. Capture efficiency directly impacts sensitivity, informative rate, and the ability to perform accurate and reliable biomarker analyses on the CTCs, all of which increase the value of our offering. We are utilizing some of our early research experience to improve CTC capture rates and reduce background contamination from normal white blood cells.

• Automation of Our Assay Process

Development of automation throughout the assay process, but particularly at the visual evaluation steps, which include enumeration, any ICC for biomarkers beyond those used to identify CTCs, for example protein biomarkers, and FISH analysis, is a way to drive efficiencies, reduce costs, speed up turnaround time, and generate more reliable, uniform, and in some cases more sensitive data. We have implemented an automation solution for the visual analysis, which has been validated and implemented in our CLIA laboratory. We have also developed automated systems for the separation, processing and washing steps before running a sample on the microfluidic channel, which has also been validated and implemented in the CLIA laboratory. We are currently implementing further steps in automation, including running the microfluidic channels and performing FISH. We believe these measures will reduce costs and time as well as allow for higher-throughput as sample volumes increase.

• Development of Second Generation Platform for CTC Testing

We are continuing to evaluate and develop techniques for CTC capture that take advantage of our antibody enrichment cocktail and our staining technology to modify our current CTC process into a simpler IVD testing kit format. In addition to reducing internal costs, such an advance would enable us to offer a testing kit format that can access the worldwide CTC testing market. We believe that the distribution of such kits could create a new business opportunity for us.

• Utilization of ctDNA Technology for Highly Multiplexed Mutation Testing

The ctDNA technology should enable us to multiplex mutation testing such that larger panels of genes can be analyzed in a single step and interfaced with genetic sequencing. This should position us for the analysis at the molecular level of whole signaling pathways or enzyme cascades. We plan to take advantage of the sensitivity and specificity of the ctDNA technology and leverage interest in the clinical research community for detecting any actionable biomarker in a particular tumor, as opposed to only those that are known to occur at relatively higher frequencies in that type of tumor. Such multiplexed mutation assays, relying on our ctDNA technology, could provide a more global evaluation of a tumor through analysis of either CTCs or ctDNA. This would offer a broader range of potential treatment options as well as enable the monitoring of the effectiveness of those treatments over time.

• Development of Single Cell CTC Isolation Techniques for Molecular Analysis

Tumor heterogeneity is a well-recognized problem for tissue analysis and is in part addressed by focusing on CTCs, which may provide a more universal sampling of a tumor. One result of this can be a diverse population of CTCs in a sample, with different phenotypes and genotypes represented. We are working with a collaborator on techniques for subsequent sorting of our highly enriched CTC samples released from our microfluidic channels into pools of CTCs with similar phenotypes, and ultimately to single CTCs, for molecular analysis.

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Translational/Clinical Research

In the course of our research and validation studies, we have processed and analyzed thousands of normal control and cancer patient samples. Our initial focus has been on breast cancer, where validation studies for our CTC assay, including enumeration of CTCs on the Biocept platform compared to the CellSearch^® system, and HER2 FISH performed on CTCs and compared with HER2 analysis performed on tumor tissue from the same patients, involved over 120 patient samples. The results of our validation studies, and the demonstration of a reliable and reproducible method for CTC capture and analysis using our platform were published in a paper entitled “Novel Platform for the Detection of Cytokeratin Positive (CK+) and Cytokeratin Negative (CK-) CTCs” appearing in the December 2011 issue of Cancer Discovery and a paper entitled “Efficient capture of circulating tumor cells with a novel immunocytochemical microfluidic device” appearing in the September 2011 issue of BioMicrofluidics.

Additional studies were conducted in breast and other tumor types, including lung, prostate and colorectal cancers, utilizing patient samples for comparison to the CellSearch^® system. In head-to-head studies, our system detected cytokeratin positive CTCs in comparable numbers of breast cancer patients, and in considerably more patients in the other cancer types (Cancer Discovery, December 2011). Moreover, the results clearly demonstrated that the use of our antibody enrichment cocktail enabled recovery of more CTCs compared to using only anti-EpCAM antibodies. These data served as a clinical validation study for CTC enumeration. When our staining is applied to detect cytokeratin-negative CTCs, we expect to see far more CTCs based on preliminary studies reported in a paper entitled “Detection of EpCAM-Negative and Cytokeratin-Negative CTCs in Peripheral Blood” appearing in the 2011 issue of the Journal of Oncology.

Our system has the added advantage of post-capture immunofluorescent, cytogenetic and molecular genomic analyses of the CTCs. Cells captured by Biocept’s proprietary Target-Selector™ system can be analyzed directly within the microfluidic channel, removing the need to re-deposit cells on a slide and thereby minimizing cell loss or damage. Furthermore, given the transparency of the microfluidic channel, captured cells can be immediately analyzed on a microscope. Together, these two important features allow for a very efficient process that is well suited for a laboratory developed test (LDT) performed in a CLIA laboratory. The post-capture analyses directed towards evaluation of biomarkers, are particularly important and valuable to physicians and patients since they focus on actionable information related to therapy selection. We have performed a number of clinical research studies in collaboration with The University of Texas MD Anderson Cancer Center investigators involving various tumor types, including breast, ovarian, endometrial, lung, colorectal, bladder and prostate cancers.

In a collaboration with physicians and researchers at The University of Texas MD Anderson Cancer Center, we evaluated matched samples of tumor tissue, blood for CTCs, and bone marrow for DTCs in recently diagnosed breast cancer patients to identify HER2 amplification. Positive HER2 status would indicate eligibility for HER2-targeted therapies like Herceptin^®, a potentially life-saving treatment. These results were presented at both the 2011 and 2012 annual meetings of the American Society of Clinical Oncology. In a 95 patient study published in Cancer Medicine (2013, 2(2) 226-233), HER2 positive CTCs and/or DTCs were identified in 18.9% of cases in which the primary tumor was HER2 negative. In the same cohort of patients, only 12.6% were HER2 positive in their primary tumor. In other words, beyond the 12 (of 95) patients for whom traditional tumor tissue analysis had indicated benefit from Herceptin-based therapy, the Target-Selector™ assay detected HER2 gene amplification in 18 (of 95) patients who (despite the fact they were identified as being HER2 negative by primary-tumor testing) could benefit from Herceptin-based therapy. Patients classified as HER2 negative based on tumor tissue and found to have HER2 positive CTCs and/or DTCs were subsequently monitored by our collaborators at The University of Texas MD Anderson Cancer Center to assess their overall and progression-free survival. Tumor heterogeneity is one likely cause of the discordance for HER2 status between tumor tissue and our assay performed on blood and bone marrow samples. Tumor heterogeneity indicates an important clinical application for the CTC analysis with the Target-Selector™ assay. Our technology can use a standard blood sample to confirm and crosscheck tissue analysis performed by the pathologist at the time of biopsy or surgery, especially if HER2 negative.

Our Target-Selector™ platform is well suited towards blood-based analysis of breast cancer biomarkers. A 24-patient study published with Columbia University (Clinical and Translational Oncology, 2015, 17(7):539-46) demonstrated the feasibility of CTC testing to evaluate ER and PR status in metastatic breast cancer (mBC) patients. Results showed a concordance of 83% and 68% in ER/PR status between CTCs vs. metastatic tissue tumor, and CTCs vs. primary tissue, respectively. More recently, a December 2016 San Antonio Breast Cancer Symposium poster presentation featured the evaluation of 74 mBC patients. This collaborative work with the Sarah Cannon Research Institute, demonstrated detection of CTCs in 99% of mBC patient samples. In addition, ER protein expression concordance was 84% in cytokeratin positive cells and 18% in

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cytokeratin negative cells. FISH-based analysis of captured CTCs displayed tissue concordances of 93% and 68% for HER2 gene amplification in cytokeratin positive CTCs and cytokeratin negative CTCs, respectively; FGFR1 amplification concordances to tissue were 79% and 67% for cytokeratin positive CTCs and cytokeratin negative CTCs, respectively. While further investigation is needed to elucidate the significance of cytokeratin negative cells as a possible prognostic indicator to evaluate ER, HER2 and FGFR1 biomarkers in mBC patients, our ability to assess cytokeratin positive and negative CTCs affords a distinct advantage over other CTC technologies that rely solely upon characterization of cytokeratin positive CTCs.

We have also developed proprietary and robust technology to detect and quantify mutant ctDNA in plasma originating from the same blood sample that is used for the previously described CTC analyses. In collaboration between Mexico’s Instituto Nacional de Cancerologia and AstraZeneca, a clinical evaluation of blood-based liquid biopsy mutational profiling using our service was performed on 60 advanced-stage non-small cell lung cancer patients. Target-Selector™ assays are highly sensitive with the ability to detect EGFR mutations down to one mutant copy per milliliter of plasma. The high concordance of ctDNA versus tissue exhibited in this work highlights Target-Selector™ plasma ctDNA assays as a viable and practical means to detect EGFR activating and acquired resistance mutations relevant for guiding targeted therapy decisions.

Clinical utility studies, which demonstrate the specific clinical setting in which a particular CTC or ctDNA assay is used, and how to use the information generated for medical, specifically treatment-related, decision making is a key part of our strategy and research and development plan. Data resulting from such studies is critical not only in the sales and marketing process, but also for reimbursement, as many health plans and government payers now ask for peer-reviewed publications describing such studies and results before agreeing to coverage of a specific assay. We are involved in and plan to become involved in numerous studies to further demonstrate the clinical utility of our assays.

Sales and Marketing

At December 31, 2019, our sales organization consisted of 10 sales representatives placed in strategic locations around the country that have high concentrations of cancer patients, and we may, depending on assay volume, potentially grow this number to 20-25 sales representatives within two years and to 30-35 within five years. We have defined sales territories and have hired sales professionals with extensive successful experience in clinical oncology sales or oncology diagnostic testing sales from leading biopharmaceutical, pharmaceutical or specialty reference laboratory companies. We plan on growing this specialized, oncology-focused sales force and supporting it with clinical specialists who bring significant technical knowledge in the use of CTC and ctDNA assays.

Finally, we have invested in managed care sales and marketing experts in order to pursue favorable payment and coverage for our liquid biopsy testing services. The key value proposition for these customers will include clinical utility and cost savings by offering our assays as a complement and/or alternative to expensive surgeries when tumor biopsy tissue is insufficient or not available.

Our sales and marketing efforts are and will be based on a five-part marketing strategy:

• Work with oncologists, other physicians and group practices at community hospitals and cancer centers to educate them on the advantages and opportunities that CTC and ctDNA assays provide for better information, allowing them to select the most appropriate therapy for their patients, and how and when these assays are most effectively used;

• build relationships with key thought leaders in oncology, specifically in the cancer types for which we are offering or plan to offer assays, to educate and support community oncologists;

• collaborate with leading research universities and institutions that enable the validation of our new assays, as well as the generation of clinical utility data;

• partner with pharmaceutical companies for clinical trial work focusing on CTC and ctDNA testing and analysis; and

• add value for the payer community by delivering clinically actionable information and providing a cost-effective alternative to access clinically actionable information through the use of a simple blood test.

We also take advantage of customary marketing channels commonly used by the diagnostic and pharmaceutical industries, such as medical meetings, broad-based publication of our scientific and clinical data, and the internet. In addition, we provide easy-to-access information to our customers through our website and a data portal for physicians who wish to access test

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results electronically. Our customers value secure and easily accessible information in order to quickly review their patients’ information and begin developing a treatment protocol.

Outside the United States

Outside the United States, where a central laboratory business model is less developed, we will evaluate opportunities with our existing and other partners for the conversion and/or development of our current and planned CTC and ctDNA assays into test systems or IVDs, and related strategies to develop and serve such regional oncology markets. We also plan to sell our clinical trial services to biopharmaceutical companies and research organizations outside the United States.

We plan to cooperate with partners on accessing markets internationally. We plan for this to be accomplished either through partnerships with local groups and distributors or the development of IVD test kits and/or test systems, including instrumentation.

Competition

As a cancer diagnostics company focused on current and planned assays for CTCs and ctDNA from standard blood samples, we rely extensively on our ability to combine novel technology and biomarker information with high-quality, state-of-the art clinical laboratory testing. We believe that we compete principally on the basis of:

• Our ability to utilize standard blood samples, enabling frequent testing of patients through the course of their disease in addition to, or without a biopsy, thereby reducing cost and trauma, saving time, and providing real-time information on the current status of the tumor;

• our ability to include biomarker information in our analysis, in addition to CTC enumeration, thereby providing a more complete profile of a patient’s disease than existing CTC tests. This clinically actionable information can assist physicians in selecting more personalized treatment plans for individual patients;

• our current and planned future CTC assays’ ability to capture and detect a broader range of CTC phenotypes than existing tests, and potentially at earlier stages of disease, resulting in fewer non-informative cases and more information for physicians. For example, our antibody capture cocktail targets not only EpCAM but also other epithelial antigens as well as mesenchymal and cancer stem cell antigens, indicative of cells having undergone the epithelial-to-mesenchymal transition. These cells may be more relevant for metastasis;

• our ability to rapidly integrate new biomarkers, either validated in academic laboratories or of interest to pharmaceutical and biopharmaceutical companies in the context of their new therapies, into our current and planned future assays, facilitating the expansion of actionable information for medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians;

• our research and clinical collaborations with key academic and clinical study groups, which enhance our research and development resources and, by enhancing our standing in the oncology community, support our marketing efforts; and

• our current and planned ctDNA assays based on our patented technology, which currently offer and are expected to continue to offer enhanced sensitivity and specificity in detecting mutation targets or resistance markers, again supporting treatment decisions.

We believe that we compete favorably with respect to these factors, although we cannot assure you that we will be able to continue to do so in the future or that new products or assays that perform better than our current and planned future assays and services will not be introduced. We believe that our continued success depends on our ability to:

• Expand and enhance our current and planned Target-Selector™ assays to provide clinically meaningful information in additional cancers;

• work with clinicians to design and implement clinical studies that demonstrate the clinical utility of our products;

• continue to innovate and maintain scientifically advanced technology including development and regulatory approvals;

• successfully market and sell assays;

• continue to comply with regulatory guidelines and obtain appropriate regulatory approvals in the United States and abroad as applicable;

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• continue to validate our pipeline of assays;

• conduct or collaborate with clinical utility studies to demonstrate the application and medical value of our assays;

• continue to seek to obtain positive coverage and reimbursement decisions from Medicare and private third-party payers;

• continue to enter into sales and marketing partnerships;

• maintain existing and enter into new research and clinical collaborations with key academic and clinical study groups;

• continue to attract and retain skilled scientific, clinical, laboratory, and marketing personnel;

• continue to participate in and gain clinical trial work through biopharma partnerships;

• receive payment for the testing we provide for patients;

• obtain patents or other protection for our technologies, assays and services; and

• obtain and maintain our clinical reference laboratory accreditations and licenses.

Our principal competition comes from mainstream diagnostic methods, used by medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians for many years, which focus on tumor tissue analysis. The methods or behavior of medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians may be difficult to change regarding the use of our CTC and ctDNA testing, including molecular diagnostic testing, in their practices in conjunction with or instead of tissue biopsies and analysis. In addition, companies offering capital equipment and kits or reagents to local pathology laboratories represent another source of potential competition. These kits are used directly by the pathologist, which can facilitate adoption. Historically, we have focused our marketing and sales efforts on medical oncologists rather than pathologists, although commencing in October 2017, our Empower TC offering provides the unique ability for pathologists to participate in the interpretation of liquid biopsy results and is available to pathology practices and hospital systems throughout the United States.

We also face competition from companies that offer products or are conducting research to develop products for CTC or ctDNA testing in various cancers. CTC and ctDNA testing is a new area of science and we cannot predict what assays others will develop that may compete with or provide results similar or superior to the results we are able to achieve with the assays we develop. Competitors include but are not limited to companies such as Atossa, Agena, Qiagen, Roche, Guardant Health, Menarini Silicon Biosystems, Alere (Adnagen), Illumina, Apocell, EPIC Sciences, Clearbridge Biomedics, Biodesix, Thermo Fisher Scientific, Foundation Medicine, Neogenomics, Cynvenio Biosystems, Genomic Health, Fluxion Biosciences, RareCells, ScreenCell, and Sysmex. Some of these groups, in addition to operating research and development laboratories, are establishing CLIA-certified testing laboratories while others are focused on selling equipment and reagents.

There are a number of companies which are focused on the oncology diagnostic market, such as Cancer Genetics, Caris, Neogenomics and Agendia, who while not currently offering CTC or ctDNA assays are selling to the medical oncologists and pathologists and could develop or offer CTC or ctDNA assays. Large laboratory services companies such as Quest and LabCorp provide more generalized cancer diagnostic testing but could also offer a CTC or ctDNA testing services. Companies like Abbott, Danaher, Qiagen, Thermo Fisher Scientific and others could develop equipment or reagents in the future as well.

Some of our present and potential competitors have widespread brand recognition and substantially greater financial and technical resources and development, production and marketing capabilities than we do. Others may develop lower-priced, less complex assays that payers, medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians could view as functionally equivalent to our current or planned future assays, which could force us to lower the list price of our assays and impact our operating margins and our ability to achieve and maintain profitability. In addition, technological innovations that result in the creation of enhanced diagnostic tools that are more sensitive or specific than ours may enable other clinical laboratories, hospitals, physicians or medical providers to provide specialized diagnostic assays similar to ours in a more patient-friendly, efficient or cost-effective manner than is currently possible. If we cannot compete successfully against current or future competitors, we may be unable to increase or create market acceptance and sales of our current or planned future assays, which could prevent us from increasing or sustaining our revenues or achieving or sustaining profitability.

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Additionally, projects related to cancer diagnostics and particularly genomics have received increased government funding, both in the United States and internationally. As more information regarding cancer genomics becomes available to the public, we anticipate that more products aimed at identifying targeted treatment options will be developed and that these products may compete with ours. In addition, competitors may develop their own versions of our current or planned future assays in countries where we did not apply for patents or where our patents have not issued and compete with us in those countries, including encouraging the use of their assay by physicians or patients in other countries.

Third-Party Suppliers and Manufacturers

Some of the components used in our current or planned future products are currently sourced from a supplier for which alternative suppliers exist, but we have not validated the products of such alternative suppliers, and substitutes for these components might not be able to be obtained easily or may require substantial design or manufacturing modifications. Any significant problem experienced by any one of our suppliers may result in a delay or interruption in the supply of components to us until that supplier cures the problem or an alternative source of the component is located and qualified. Any delay or interruption would likely lead to a delay or interruption in our manufacturing operations. The inclusion of substitute components must meet our product specifications and could require us to qualify the new supplier with the appropriate government regulatory authorities.

Patents and Technology

The proprietary nature of, and protection for, our products, services, processes, and know-how are important to our business. Our success depends in part on our ability to protect the proprietary nature of our products, services, technology, and know-how, to operate without infringing on the proprietary rights of others, and to prevent others from infringing our proprietary rights. We seek patent protection in the United States and internationally for our products, services and other technology. Our policy is to patent or in-license the technology, inventions and improvements that we consider important to the development of our business.

We also rely on trade secrets, know-how, and continuing innovation to develop and maintain our competitive position. We cannot be certain that patents will be granted with respect to any of our pending patent applications or with respect to any patent applications filed by us in the future, nor can we be sure that any of our existing patents or any patents granted to us in the future will be commercially useful in protecting our technology.

Our success depends on an intellectual property portfolio that supports our future revenue streams and erects barriers to our competitors. We are maintaining and building our patent portfolio through filing new patent applications, prosecuting existing applications, and licensing and acquiring new patents and patent applications.

Despite these measures, any of our intellectual property and proprietary rights could be challenged, invalidated, circumvented, infringed or misappropriated, or such intellectual property and proprietary rights may not be sufficient to permit us to take advantage of current market trends or otherwise to provide competitive advantages. For more information, see the section entitled “Risk Factors – Intellectual Property Risks Related to Our Business.”

We have issued patents with broad claims covering our blood collection tube, antibody cocktail approach, microchannel, CTC detection methodologies, and ctDNA analysis. In addition to issued patents in the U.S., we have patents for our proprietary microchannel in China, South Korea, Europe, Hong Kong, Canada and Japan, and for our antibody cocktail in Australia, Europe, Hong Kong and Japan. Our patent estate continues to evolve, and in addition to the broad patent estate around our CTC platform, we also have issued patents in the U.S., Australia, Europe, Japan, China and South Korea for our novel switch blocker technology, solidifying our proprietary enrichment methodology for detecting ctDNA with very high sensitivity. Our CTC platform patents were filed from 2005 through 2012, and we expect to have patent protection into the 2030s. Our CTC patents and applications cover not only cancer as a target, but also prenatal and other rare cells of interest. Recently allowed patents in the U.S. cover the capture of “any target of interest on any solid surface” using our antibody capture approach. The patent for our proprietary specimen collection tubes expire in 2031, and the patents for our ctDNA technology expire in the early 2030’s.

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As of December 31, 2019, we owned 36 issued patents and 13 patents pending related to our current technologies. Of these, 9 were issued and 4 were pending patents in the U.S., while 27 were issued and 11 were pending patents in non-U.S. territories. Separately, we also owned 7 issued patents related to our earlier microarray and cell analysis technology.

Microfluidic Channels. At December 31, 2019, we had 4 issued U.S. patents that are related to our current business, and in 2018 and 2019 we received an additional issued patent on our microfluidic channel in each of China and Hong Kong, respectively, in addition to our earlier allowances in Japan, Hong Kong, Europe, China, and South Korea, which cover our microfluidic channel technology. Further U.S. and foreign patent application are pending.

Blood Collection Tubes. In 2015, we received a U.S. patent related to our blood collection tubes, which contain reagents designed to prevent clumping of blood cells and CTCs that could clog the microfluidic channels and disrupt our assays.

Antibody Enrichment Cocktail. At December 31, 2019, we had 2 issued and 1 pending U.S. patent application, and 2 broadly issued European patents, as well as other corresponding foreign patent applications directed to our antibody capture cocktail technology. This technology includes using antibodies to a number of tumor-associated antigens from cancer cells of both epithelial and mesenchymal phenotype, as well as cancer stem cells.

Enhanced Staining. At December 31, 2019, we had 1 issued U.S. patent, 1 issued Chinese patent, and 1 issued Japanese patent, as well as corresponding foreign patent applications directed to this technology.

Target-Selector Mutation Detection Technology. At December 31, 2019, we co-owned 1 issued and 1 pending U.S. patent, 1 issued Australian patent, 1 issued Chinese patent, 1 issued Japanese patent, and 1 issued European (7 countries) patent, as well as with Aegea Biotechnologies, Inc., or Aegea. Under our agreement with Aegea, we have certain exclusive rights for oncology clinical testing and diagnostics as well as limited rights for oncology basic and clinical research. Aegea is responsible for the prosecution of 1 U.S. patent application, while we are responsible for the prosecution of the second U.S. application and its corresponding foreign applications. Lyle J. Arnold, Ph.D., our Senior Vice-President of Research & Development and Chief Scientific Officer, is the controlling person of Aegea.

Operations and Production Facilities

Our research and development laboratory, our CLIA-certified, CAP accredited, and state-licensed diagnostic testing laboratory, and our manufacturing facility are located in our San Diego, California headquarters. The laboratories employ commercial state-of-the-art equipment as well as custom-made components specific to our CTC process that are generated in a small in-house engineering shop. The manufacturing facility used for the production of our microfluidic channels is a Class 10,000 suite in which polydimethylsiloxane (PDMS) is formed into the base of our proprietary microfluidic channels in a molding process. A glass cover slip suitable for optical analysis is added to seal the channels and make them watertight. Plasma activation is utilized to bond the polydimethylsiloxane (PDMS) with other functional groups typically leaving an amine functional group for binding. The inside of the microfluidic channels is subsequently chemically derivatized to enable the attachment of binding elements that strongly bind to antibody-tagged (fluorescently conjugated) or coated CTCs. Because the microfluidic channels have micrometer dimensions, and we are seeking individual cells in a blood sample to interact with the surface of the microfluidic channel, dust particles and other microscopic debris that could clog the channel need to be avoided. Humidity is also a factor that affects binding capability especially in the plasma activation step.

The process of performing our assays is straightforward. When a health care professional takes a standard venous blood sample from a patient for CTC or ctDNA testing, he or she will place the blood sample in our blood collection tubes, complete a requisition form, and package the specimen in our shipping kit for direct shipment to us. Once we receive the specimen at our laboratory and we enter all pertinent information about the specimen into our clinical laboratory information system, our laboratory technologists prepare the specimen for processing and analysis. Laboratory technologists, including clinical laboratory technologists and clinical laboratory scientists then conduct the analysis, including enumeration of CTCs and biomarker analysis such as FISH. Usage of fluorescent tags enables colored imaging in this process to increase the biomarker analysis capability. The data, including images and the processed cells, are sent to our in-house or contracted pathologists or a commercialization partner’s pathologists who are experienced in the analysis and evaluation requested by the referring oncologist or pathologist.

After analysis, our in-house or contracted pathologists or a commercialization partner’s pathologists use laboratory information systems to prepare a comprehensive report, which may include selected relevant images associated with the specimen. Our Internet reporting portal allows a referring oncologist or pathologist to access his or her patient’s test results in

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real time in a secure manner that we believe to be compliant with the Health Insurance Portability and Accountability Act, or HIPAA, and other applicable standards. The reports are generated in industry standard .pdf formats which allows for high definition color images to be reproduced clearly. We send the results to the ordering physician and bill the payer using third-party medical billing software.

Quality Management Program

We have established a Quality Management Program for our research, development and Clinical Laboratory Improvement Amendments (CLIA) certified testing laboratories. This program is designed to help ensure accurate and timely test results, to produce consistent high-quality testing services, as well as procedures which allow for the continual improvement of established and new operations. Our Quality Management Program foundation is built upon a rigorous documentation program which allows transparent quality assurance and performance improvement plans, necessary to ensure the highest quality of diagnostic testing services. This program is designed to satisfy the requirements of local and state licensures, as well as those for accreditation by CAP. The CAP accreditation program involves unannounced on-site inspections of our laboratories. CAP is an independent, non-governmental organization of board-certified pathologists that accredits laboratories nationwide on a voluntary basis and that has been recognized by the Center for Medicare & Medicaid Services, or CMS as an accreditation organization to inspect laboratories to determine adherence to CLIA standards.

We are committed to providing reliable and accurate diagnostic testing to our customers. Accurate specimen sample management, timely communication of test results, and strict adherence to patient privacy policies are a critical core competency of our company. We monitor and improve our performance through our internal audit program, which investigates any abhorrent results, continually track performance indicators, perform internal proficiency testing and host external quality audits, primarily conducted by CAP.

In addition to the compulsory proficiency programs and external inspections required by CMS and other regulatory agencies, we have developed a variety of internal systems and procedures to emphasize, monitor and continuously improve the quality of our operations. We maintain internal quality controls by routinely processing specimens with known diagnoses in parallel with patient specimens. We also have an internally administered proficiency program for specimen testing.

Third-Party Payer Reimbursement

Revenues from our clinical laboratory testing are derived from several different sources. Depending on the billing arrangement, instructions of the ordering physician and applicable law, parties that reimburse us for our services include:

• Third-party payers that provide coverage to the patient, such as an insurance company, a managed care organization or a governmental payer program;

• physicians or other authorized parties, such as hospitals or independent laboratories, that order the testing service or otherwise refer the services to us;

• patients in cases where the patient has no insurance, has insurance that partially covers and reimburses the testing, or owes a co-payment, co-insurance or deductible amount;

• collaboration partners; or

• biopharmaceutical companies, universities or researchers for clinical trial work.

We are reimbursed for two categories of testing, anatomic pathology, which includes cell staining and the enumeration component of CTC assays, FISH, ICC and immunofluorescence, and molecular pathology, which includes mutation analysis. Reimbursement under the Medicare program for the diagnostic services that we offer is based on either the Medicare Physician Fee Schedule, or PFS, or the Medicare Clinical Laboratory Fee Schedule, or CLFS, each of which is subject to geographic adjustments and is updated annually. Medical services provided to Medicare beneficiaries that require a degree of physician supervision, judgment or other physician involvement, such as pathology services, are generally reimbursed under the PFS, whereas clinical diagnostic laboratory tests are generally reimbursed under the CLFS. Some of the services that we provide are genetic and molecular testing, which are reimbursed as clinical diagnostic laboratory tests.

Regardless of the applicable fee schedule, Medicare payment amounts are established for each Current Procedural Terminology, or CPT, code. In addition, under the Clinical Laboratory Fee Schedule, Medicare also sets a cap on the amount

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that it will pay for any individual assay. This cap, usually referred to as the National Limitation Amount, is set at a percentage of the median of all the contractor fee schedule amounts for each billing code.

Medicare also has policies that may limit when we can bill directly for our services and when we must instead bill another provider, such as a hospital. When the testing that we perform is done on a specimen that was collected while the patient was in the hospital, as either an inpatient or outpatient, we may be required to bill the hospital for clinical laboratory services and for the technical component of pathology services. Which party is to be billed depends primarily on whether the service was ordered at least 14 days after the patient’s discharge from the hospital. Complying with these requirements is complex and time-consuming and may affect our ability to collect for our services. In addition, hospitals may refuse to pay our invoices or may demand pricing that negatively affects our profit margin.

Medicare generally requires a beneficiary to pay a 20% co-insurance amount for most services billed under the PFS. Medicare covers the remaining 80% in such circumstances. There is currently no patient co-payment or co-insurance amount applicable to testing billed under the CLFS. Patients often have supplemental insurance policies that cover the co-insurance amount for physician services.

Medicare has coverage policies that can be national or regional in scope. Coverage means that assay is approved as a benefit for Medicare beneficiaries. If there is no coverage, neither the supplier nor any other party, such as a reference laboratory, may receive reimbursement from Medicare for the service. There is currently no national coverage policy regarding the CTC enumeration portion of our testing. Because our laboratory is in California, the regional Medicare Administrative Contractor, or MAC, for California is the relevant MAC for all our testing. The previous MAC for California, Palmetto GBA, LLC, or Palmetto, which is contracted with CMS to administer the Molecular Diagnostic Services, or MolDx, program that sets guidelines for coding, coverage and reimbursement of molecular diagnostic assays, adopted a negative coverage policy for CTC enumeration. The current MAC for California, Noridian Healthcare Solutions, LLC, is adopting the coverage policies from Palmetto. Therefore, the enumeration portion of our testing is not currently covered, and we will receive no payment from Medicare for this portion of the service unless and until the coverage policy is changed. Although approximately 76% and 78% of all billable cases received during the years ended December 31, 2018 and 2019, respectively, relate to our Target-Selector™ biomarker assays, we continue to receive orders for our traditional enumeration testing, which counts disease burden, and therefore the enumeration testing receives no payment from Medicare based upon the existing coverage decision. The CTC enumeration counts disease burden and is a prognostic test, and although oncologists find the information valuable, it does not currently meet many of the medical necessity requirements of Medicare and the payers. We intend to pursue payment for the capture portion of our CTC technology that allows us to run our diagnostic testing for some of our Target-Selector™ assays.

Reimbursement rates paid by private third-party payers can vary based on whether we are considered to be an “in-network” provider, a participating provider, a covered provider, an “out-of-network” provider or a non-participating provider. These definitions can vary among payers, but we are generally considered an “out-of-network” or non-participating provider by the vast majority of private third-party payers. An in-network provider usually has a contract with the payer or benefits provider. This contract governs, among other things, service-level agreements and reimbursement rates. In certain instances, an insurance company may negotiate an in-network rate for our testing. An in-network provider may have rates that are lower per assay than those that are out-of-network, and that rate can vary widely. The rate varies based on the payer, the testing type and often the specifics of the patient’s insurance plan. If a laboratory agrees to contract as an in-network provider, it generally expects to receive quicker payment and access to additional covered patients.

Billing and Billing Codes for Third-Party Payer Reimbursement

CPT codes are the main billing code set used by physicians, hospitals, laboratories and other health care professionals to report separately-payable clinical laboratory and pathology services for reimbursement purposes. The CPT coding system is maintained and updated on an annual basis by the American Medical Association. We believe there are existing codes that describe nearly all of the steps in our testing process. We currently use a combination of codes to bill for our testing and analysis.

In order to ensure our coding is compliant, we have engaged industry experts to provide guidance on the proper coding of our assays. These experts include consultants at Senergene Solutions, LLC, Codemap, LLC and ADVI Health, LLC. However, coding can be complex, and payers may require differing codes for a given assay to effect payment. Changes in coding and reimbursement could adversely impact our revenues going forward, or payers could request that we reimburse them for

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payments we have already received. There can be no guarantees that Medicare and other payers will establish new positive or adequate coverage policies or reimbursement rates, or not change existing positive coverage policies, in the future.

We are moving forward with plans to obtain reimbursement coverage for the capture components of our assays. For other tests, we are able to utilize existing CPT codes from the PFS and CLFS. For these established CPT codes (for example, the codes for molecular testing, FISH and ICC), positive coverage determinations have been adopted as part of national Medicare policy or under applicable Local Coverage Determinations. Specific codes for our assays, however, do not assure an adequate coverage policy or reimbursement rate. Please see the section entitled “Legislative and Regulatory Changes Impacting Clinical Laboratory Tests” for further discussion of certain legislative and regulatory changes to these billing codes and the anticipated impact on our business.

Coverage and Reimbursement for our Current Assays and our Planned Future Assays

Our Medicare Administrative Contractor has issued a negative coverage determination for the enumeration component of all CTC assays. We have received reimbursement for the enumeration component of our assays from some private payers, including major private third-party payers, based on submission of standard CPT codes. FISH, ICC and Molecular Testing CPT codes are the subject of positive coverage national or local Medicare determinations. We believe these codes can be used to bill for the analysis components of our current and planned future CTC assays, however, CMS, Palmetto or Noridian could adopt specific negative coverage policies for CTCs or ctDNA analysis in the future.

We expect these analysis components to have a significantly greater reimbursement value than the enumeration components of our current and anticipated CTC assays, based on a comparison of what we believe CellSearch^® enumeration reimbursement rates currently are, versus existing reimbursement rates for analysis components such as FISH and ICC analysis and molecular testing.

Additionally, on March 16, 2018 CMS issued a final determination decision memo for Next-Generation Sequencing, or NGS, tests for Medicare Beneficiaries with Advanced Cancer (CAG-00450N).  Under this final determination, NGS tests that gain FDA approval or clearance as a companion diagnostic will receive coverage, and the final determination of coverage for NGS tests that are LDTs will be left up to the local MAC. Currently, only 1 of our 15 CLIA validated assays is NGS-based; however, we plan to offer additional NGS assays in the future. To gain coverage for those assays, we will need to apply to Palmetto, which is the MAC that evaluates and recommends payment coverage or denial for molecular testing in our jurisdiction. Historically, Palmetto has offered a path to reimbursement by providing coverage while data is being gathered known as Coverage with Data Development, or CDD. Going forward, the extent to which CDD will be continued, if at all, or to the extent that a process will be available in its place, if any, are unclear.  

We believe, based on research showing that approximately 54% of new cancers occur in persons age 65 and older and that almost all Americans age 65 and older are enrolled in Medicare that a substantial portion of the patients for whom we would expect to perform cancer diagnostic assays will have Medicare as their primary medical insurance. We cannot assure you that, even if our current and our planned future assays are otherwise successful, reimbursement for the currently Medicare-covered portions of our current and our planned future assays would, without Medicare reimbursement for the enumeration portion, produce sufficient revenues to enable us to reach profitability and achieve our other commercial objectives.

Where there is a private or governmental third-party payer coverage policy in place, we bill the payer and the patient in accordance with the established policy. Where there is no coverage policy in place, we pursue reimbursement on a case-by-case basis. Our efforts in obtaining reimbursement based on individual claims, including pursuing appeals or reconsiderations of claims denials, could take a substantial amount of time, and bills may not be paid for many months, if at all. Furthermore, if a third-party payer denies coverage after final appeal, payment may not be received at all. We are working to decrease risks of nonpayment by implementing a revenue cycle management system.

We cannot predict whether, or under what circumstances, payers will reimburse for all components of our assays. Payment amounts can also vary across individual policies. Full or partial denial of coverage by payers, or reimbursement at inadequate levels, would have a material adverse impact on our business and on market acceptance of our assays.

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Legislative and Regulatory Changes Impacting Clinical Laboratory Tests

From time to time, Congress has revised the Medicare statute and the formulas it establishes for both the CLFS, and the PFS. Annually, CMS releases the payment amounts under the Medicare fee schedules. The rates are important because they not only determine our reimbursement under Medicare, but those payment amounts are also often used as a basis for payment amounts set by other governmental and private third-party payers. For example, state Medicaid programs are prohibited from paying more than the Medicare fee schedule limit for clinical laboratory services furnished to Medicaid recipients.

In accordance with Section 1833 (h)(2)(A)(i) of the Social Security Act, the annual update to the CLFS for calendar year 2019 was 2.30% (see 42 CFR405.509(b)(1)). With respect to our diagnostic services for which we expect to be reimbursed under PFS, CMS issues a Final Rule on an annual basis. Since 2015, the PFS Final Rules have included both increases and decreases in certain relative value units and geographic adjustment factors used to determine reimbursement for a number of codes used in our current assays and our planned future assays. These codes describe services that we must perform in connection with our assays and we bill for these codes in connection with the services that we provide.

Additionally, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act, or collectively the ACA, enacted in March 2010, makes a number of substantial changes in the way health care is financed by both governmental and private insurers.

Although some of these provisions may negatively impact payment rates for clinical laboratory tests, the ACA also extended coverage to over 30 million previously uninsured people, which resulted in an increase in the demand for certain diagnostic assays. There remain judicial and Congressional challenges to certain aspects of the ACA, as well as efforts by the Trump administration to repeal or replace certain aspects of the ACA.Since January 2017, the President of the United States has signed two executive orders and other directives designed to delay, circumvent, or loosen certain requirements mandated by the ACA. Concurrently, Congress has considered legislation that would repeal or repeal and replace all or part of the ACA. While Congress has not passed comprehensive repeal legislation, it has enacted laws that modify certain provisions of the ACA such as removing penalties effective January 1, 2019, for not complying with the ACA’s individual mandate to carry health insurance and eliminating the implementation of certain ACA-mandated fees, including but not limited the Medical Device Excise Tax. On December 14, 2018, a Texas U.S. District Court Judge ruled that the ACA is unconstitutional in its entirety because the “individual mandate” was repealed by Congress as part of legislation enacted in 2017, informally titled the Tax Cuts and Jobs Act of 2017. Additionally, on December 18, 2019, the U.S. Court of Appeals for the 5th Circuit upheld the District Court ruling that the individual mandate was unconstitutional and remanded the case back to the District Court to determine whether the remaining provisions of the ACA are invalid as well. On March 2, 2020, the United States Supreme Court granted the petitions for writs of certiorari to review this case and has allotted one hour for oral arguments. It is unclear how such litigation and other efforts to repeal and replace the ACA will impact the ACA.

Moreover, other legislative changes have been proposed and adopted since the ACA was enacted. The Protecting Access to Medicare Act of 2014, or PAMA, was signed to law, which, among other things, significantly altered the current payment methodology under the CLFS. Under the new law, issued in 2016 and the reporting period beginning in 2017 and every three years thereafter (or annually in the case of advanced diagnostic laboratory tests), applicable clinical laboratories must report laboratory test payment data for each Medicare-covered clinical diagnostic laboratory test that it furnishes during the specified time period. The reported data must include the payment rate (reflecting all discounts, rebates, coupons and other price concessions) and the volume of each test that was paid by each private payer (including health insurance issuers, group health plans, Medicare Advantage plans and Medicaid managed care organizations). Effective January 1, 2018, the Medicare payment rate for each clinical diagnostic laboratory test is equal to the weighted median amount for the test from the most recent data collection period. The payment rate applies to laboratory tests furnished by a hospital laboratory if the test is separately paid under the hospital outpatient prospective payment system. The PAMA rate changes to our tests that were impacted did not materially affect our payments beginning in 2018; however, we cannot predict how this may change future payment in coming years. Also, under PAMA, CMS is required to adopt temporary billing codes to identify new tests and new advanced diagnostic laboratory tests that have been cleared or approved by the FDA. For an existing test that is cleared or approved by the FDA and for which Medicare payment is made as of April 1, 2014, CMS is required to assign a unique billing code if one has not already been assigned by the agency. In addition to assigning the code, CMS is required to publicly report payment for the tests. Further, under PAMA, CMS is required to adopt temporary billing codes to identify new tests and new advanced diagnostic laboratory tests that have been cleared or approved by the FDA.

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Further, with respect to the Medicare program, Congress has proposed on several occasions to impose a 20% coinsurance charge on patients for clinical laboratory tests reimbursed under the Medicare Clinical Laboratory Fee Schedule, which would require us to bill patients for these amounts. Because of the relatively low reimbursement for many clinical laboratory tests, in the event that Congress were to ever enact such legislation, the cost of billing and collecting for these services would often exceed the amount actually received from the patient and effectively increase our costs of billing and collecting.

Some of our Medicare claims may be subject to policies issued by Palmetto and Noridian Healthcare Solutions, our former and current MACs for California, respectively. Palmetto has issued a Local Coverage Determination, whereby Palmetto will not cover many molecular diagnostic assays, such as the enumeration component of our current assays, unless the test is expressly included in a National Coverage Determination issued by CMS or a Local Coverage Determination or coverage article issued by Palmetto. Currently, laboratories may submit coverage determination requests to Palmetto for consideration and apply for a unique billing code for each assay (which is a separate process from the coverage determination). In the event that a non-coverage determination is issued, the laboratory must wait six months following the determination to submit a new request. Palmetto currently has a negative coverage determination for the enumeration component of CTC assays, but there is no such negative coverage determination for the analysis component of such CTC assays. Denial (or continuation of denial) of coverage for the enumeration component of our current and anticipated CTC assays by Palmetto or its successor MAC, Noridian Healthcare Solutions, which adopts coverage policies set by the MolDx program, or reimbursement at inadequate levels, would have a material adverse impact on our business and on market acceptance of our current assays and our planned future assays. Noridian Healthcare Solutions intends to follow, for CTC assays, the positive or negative coverage determinations which from time to time Palmetto makes as well as any coverage policy changes set by the MolDx program. On November 27, 2013, Palmetto denied our request for coverage for the enumeration/detection portion of our testing. We have not received any other indications to suggest that the negative coverage determination will be reversed. The CTC enumeration counts disease burden and is a prognostic test, and although oncologists find this information valuable, it does not meet many of the medical necessity requirements of Medicare and the payers. We intend to pursue payment for the capture portion of our CTC technology that allows us to run our diagnostic testing for some of our Target-Selector™ assays.

Additionally, the Centers for Disease Control and Prevention, CMS and the Office of Civil Rights issued a final rule in February 2014 to amend both the HIPAA and CLIA regulations. The final rule amended the HIPAA privacy rule to remove the CLIA laboratory exceptions, and as a result, HIPAA-covered laboratories are now required to provide individuals, upon request, with access to their completed test reports. Similarly, the final rule amended CLIA to state that CLIA laboratories and CLIA-exempt laboratories may provide copies of the patient’s completed rest reports that, using the laboratory’s authentication process, can be identified as belonging to that patient.

Governmental Regulations

Clinical Laboratory Improvement Amendments of 1988 and State Regulation

As a provider of laboratory testing on human specimens for the purpose of diagnosis, prevention, or treatment, we are required to hold certain federal, state and local licenses, certifications and permits to conduct our business. In 1988, Congress enacted Clinical Laboratory Improvement Amendment of 1988, or CLIA, which established quality standards for all laboratories providing testing to ensure the accuracy, reliability and timeliness of patient test results regardless of where the test was performed. Our laboratory holds a CLIA certificate of accreditation from the College of American Pathologists, or CAP, and is in good standing. As to state laws, we are required to meet certain laboratory licensing and other requirements. Our laboratory holds the required licenses from the applicable state agencies in which we operate. For more information on state licensing requirements, see the sections entitled see the section entitled “Governmental Regulations—California State Laboratory Licensing” and “Governmental Regulations—Other States’ Laboratory Licensing.”

Under CLIA, a laboratory is defined as any facility which performs laboratory testing on specimens derived from humans for the purpose of providing information for the diagnosis, prevention or treatment of disease, or the impairment of, or assessment of health of human beings. CLIA also requires that we hold a certificate applicable to the complexity of the categories of testing we perform and that we comply with certain standards. CLIA further regulates virtually all clinical laboratories by requiring they comply with various operational, personnel, facilities administration, quality and proficiency testing requirements intended to ensure that their clinical laboratory testing services are accurate, reliable and timely. CLIA certification is also a prerequisite to be eligible to be reimbursed for services provided to state and federal health care program beneficiaries. CLIA is user-fee funded. Therefore, all costs of administering the program must be covered by the regulated facilities, including certification and survey costs.

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We are subject to survey and inspection every two years to assess compliance with program standards and may be subject to additional unannounced inspections. Laboratories performing high complexity testing are required to meet more stringent requirements than laboratories performing less complex tests. In addition, a laboratory like ours that is certified as “high complexity” under CLIA may obtain analyte-specific reagents, which are used to develop laboratory developed tests, or LDTs.

In addition to CLIA requirements, we must comply with the standards set by CAP, which accredits our laboratory. Under CMS requirements, accreditation by CAP is sufficient to satisfy the requirements of CLIA. Therefore, because we are accredited by CAP, we are deemed to also comply with CLIA. CLIA also provides that a state may adopt laboratory regulations that are more stringent than those under federal law, and certain states have implemented their own more stringent laboratory regulatory schemes.

Federal, State and Foreign Fraud and Abuse Laws

A variety of federal and state laws prohibit fraud and abuse regarding the preparation and submissions of claims for services as well as avoiding unlawful inducements in our relations with those who may refer patients to our laboratory. These laws are interpreted broadly and enforced aggressively by various state and federal agencies, including CMS, the Department of Justice, the Office of Inspector General for the U.S. Department of Health and Human Services, or HHS, and various state agencies. In addition, the Medicare and Medicaid programs increasingly use a variety of contractors to review claims data and to identify improper payments as well as fraud and abuse. These contractors include Recovery Audit Contractors, Medicaid Integrity Contractors and Zone Program Integrity Contractors. In addition, CMS conducts Comprehensive Error Rate Testing audits, the purpose of which is to detect improper Medicare payments. In addition, many private insurers as well as other managed care organizations have their own internal auditing programs to ensure against any false claims being submitted.  Any overpayments identified must be repaid unless a favorable decision is obtained on appeal. In some cases, these overpayments can be used as the basis for an extrapolation, by which the error rate is applied to a larger universe of claims, and which can result in even higher repayments.

The federal Anti-Kickback Statute prohibits, among other things, knowingly and willfully offering, paying, soliciting, receiving, or providing remuneration, directly or indirectly, to induce or in return for either the referral of an individual, or the furnishing, recommending, or arranging for the purchase, lease or order of any health care item or service reimbursable, in whole or in part, under a federal health care program. The definition of “remuneration” has been broadly interpreted to include anything of value, including gifts, discounts, credit arrangements, payments of cash, ownership interests and providing anything at less than its fair market value. Recognizing that the federal Anti-Kickback Statute is broad and may technically prohibit many innocuous or beneficial arrangements within the health care industry, the Office of Inspector General for HHS has issued a series of regulatory “safe harbors.” These safe harbor regulations set forth certain requirements that, if met, will assure immunity from prosecution under the federal Anti-Kickback Statute. Although full compliance with these provisions protects against prosecution under the federal Anti-Kickback Statute, the failure of a transaction or arrangement to fit within a specific safe harbor does not necessarily mean that the transaction or arrangement is illegal or that prosecution under the federal Anti-Kickback Statute will be pursued. For further discussion of the impact of federal and state health care fraud and abuse laws and regulations on our business, see the section entitled “Risk Factors—Regulatory Risks Relating to Our Business.” We are subject to federal and state health care fraud and abuse laws and regulations and could face substantial penalties if we are unable to fully comply with such laws.

In addition, the Health Insurance Portability and Accountability Act of 1996, or HIPAA, also created new federal civil and criminal penalties, regarding health care fraud and false statements relating to health care matters. The health care fraud statute prohibits knowingly and willfully executing a scheme to defraud any health care benefit program, including private third-party payers. A violation of this statute is a felony and may result in fines, imprisonment or exclusion from federal health care programs, such as the Medicare and Medicaid programs. The false statements statute prohibits knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false, fictitious or fraudulent statement in connection with the delivery of or payment for health care benefits, items or services. A violation of this statute is a felony and may result in fines, imprisonment or exclusion from federal health care programs.

Another development affecting the health care industry is the increased enforcement of the federal False Claims Act and, in particular, actions brought pursuant to the False Claims Act’s “whistleblower” or “qui tam” provisions. The False Claims Act imposes liability on any person or entity that, among other things, knowingly presents, or causes to be presented, a false or fraudulent claim for payment to the federal government. The qui tam provisions of the False Claims Act allow a private individual to bring actions on behalf of the federal government and permit such individuals to share in any amounts paid by

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the entity to the government in fines or settlement. In addition, various states have enacted false claim laws analogous to the federal False Claims Act, and some of these state laws apply where a claim is submitted to any third-party payer. When an entity is determined to have violated the False Claims Act, it may be required to pay up to three times the actual damages sustained by the government, plus significant civil monetary penalties.

Additionally, the civil monetary penalties statute imposes penalties against any person or entity that, among other things, is determined to have presented or caused to be presented a claim to a federal health program that the person knows or should know is for an item or service that was not provided as claimed or is false or fraudulent.

The federal Physician Payments Sunshine Act requires certain manufacturers of drugs, devices, biologics and medical supplies for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program (with certain exceptions) to report annually to CMS, information related to payments or other transfers of value made to physicians, as defined by such law, and teaching hospitals, as well as ownership and investment interests held by physicians and their immediate family members. However, at this time, such reporting requirements do not extend to clinical laboratories such as ours.

Also, many states have laws similar to those listed above that may be broader in scope and may apply regardless of payer.

Additionally, in Europe various countries have adopted anti-bribery laws providing for severe consequences, in the form of criminal penalties and/or significant fines for individuals and/or companies committing a bribery offence. Violations of these anti-bribery laws, or allegations of such violations, could have a negative impact on our business, results of operations and reputation. For instance, in the United Kingdom, under the Bribery Act 2010, a bribery occurs when a person offers, gives or promises to give a financial or other advantage to induce or reward another individual to improperly perform certain functions or activities, including any function of a public nature. Bribery of foreign public officials also falls within the scope of the Bribery Act 2010. Under the new regime, an individual found in violation of the Bribery Act 2010 faces imprisonment of up to 10 years. In addition, the individual can be subject to an unlimited fine, as can commercial organizations for failure to prevent bribery.

Despite our implementation of a robust healthcare compliance program, we may be subject, from time to time, to inspections, investigations, and other enforcement actions by governmental authorities. If we are found not to be in compliance with applicable laws or regulations, the applicable governmental authority can impose significant civil, criminal and administrative penalties, such as fines, delay, suspend, or revoke regulatory  approvals, institute proceedings to recoupment of monies, impose marketing or operating restrictions, enjoin future violations, imprisonment, exclusion from government funded healthcare programs such as Medicare and Medicaid, integrity oversight and reporting obligations, and assess similar  significant penalties against our officers or employees.

Physician Self-Referral Prohibitions

Under a federal law directed at “self-referral,” commonly known as the “Stark Law”, there are prohibitions, with certain exceptions, on Medicare and Medicaid payments for laboratory tests referred by physicians who personally, or through a family member, have a “financial relationship”—including an investment or ownership interest or a compensation arrangement—with the clinical laboratory performing the tests. Several Stark Law exceptions are relevant to arrangements involving clinical laboratories, including: (1) fair market value compensation for the provision of items or services; (2) payments by physicians to a laboratory for clinical laboratory services; (3) certain space and equipment rental arrangements that satisfy certain requirements, (4) personal services arrangements that satisfy certain requirements; and (v) ownership in certain publicly traded companies. The laboratory cannot submit claims to the Medicare Part B program for services furnished in violation of the Stark Law, and Medicaid reimbursements may be at risk as well. Penalties for violating the Stark Law include significant civil, criminal and administrative penalties, such as the return of funds received for all prohibited referrals, fines, civil monetary penalties exclusion from the federal health care programs integrity oversight and reporting obligations, and imprisonment. Many states have comparable laws that are not limited to Medicare and Medicaid referrals.

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Corporate Practice of Medicine

A number of states, including California, do not allow business corporations to employ physicians to provide professional services to patients. This prohibition against the “corporate practice of medicine” is aimed at preventing corporations such as us from exercising control over the medical judgments or decisions of physicians in treating patients. The state licensure statutes and regulations and agency and court decisions that enumerate the specific corporate practice rules vary considerably from state to state and are enforced by both the courts and regulatory authorities, each with broad discretion. If regulatory authorities or other parties in any jurisdiction successfully assert that we are engaged in the unauthorized corporate practice of medicine, we could be required to restructure our contractual and other arrangements. In addition, violation of these laws may result in significant civil, criminal and administrative penalties, such as sanctions imposed against us and/or the professional through licensure proceedings, and exclusion from state and federal health care programs. However, it is important to note that laboratories may contract with physicians to act as medical directors for their company as long as none of the compensation is for professional services rendered to patients.

Direct Billing Laws and Other State Law Restrictions on Billing for Laboratory Services

Laws and regulations in certain states prohibit laboratories from billing physicians or other purchasers directly for testing that they order. Some of those laws and regulations apply only to anatomic pathology services while others extend to other types of testing. Some states may allow laboratories to bill physicians directly but may prohibit the physician (and, in some cases, other purchasers) from charging more than the purchase price for the services (or may allow only for the recovery of acquisition costs) or may require disclosure of certain information on the invoice. In some cases, and if not prohibited by law or regulation, we may bill physicians, hospitals and other laboratories directly for the services that they order. An increase in the number of states that impose similar restrictions could adversely affect us by encouraging physicians to perform laboratory services in-house or by causing physicians to refer services to other laboratories that are not subject to the same restrictions.

CMS promulgated in 2009, a revision to the regulation that prohibits the mark up of purchased diagnostic services 42 C.F.R. §414.50 (the “Anti-Markup Rule”). The Anti-Markup Rule prohibits a physician or other supplier from marking up the price paid for the technical or professional component of a diagnostic test that was ordered by the billing physician or supplier and which was performed by a physician who does not share a practice with the billing physician or supplier. The billing physician is prohibited from billing the Medicare program an amount greater than the lesser of: (i) the performing supplier’s net charge to the billing physician; (ii) the billing physician’s actual charge; or (iii) the fee schedule amount for the test that would be allowed if the performing supplier billed directly.

Physician Licensing

A number of the states where specimens originate require that the physician interpreting those specimens be licensed by that particular state. Physicians who fail to comply with these licensure requirements could face fines or other penalties for practicing medicine without a license and we could be required to pay those fines on behalf of our pathologists or subject to liability under the federal False Claims Act and similar state laws if we bill for services furnished by unlicensed pathologists. We do not believe that the services our pathologists perform constitute the practice of medicine in any state in which our pathologists are not licensed.

In addition, many states also prohibit the splitting or sharing of fees between physicians and non-physician entities. We do not believe that our contractual arrangements with physicians, physician group practices or hospitals will subject us to claims under such regulations. However, changes in the laws may necessitate modifications in our relationships with our clients.

California State Laboratory Licensing

Our laboratory is licensed and in good standing under the State of California Department of Public Health standards. Our current licenses permit us to receive specimens obtained in California.

California state laws and regulations also establish standards for the day-to-day operations of clinical laboratories, including physical facility requirements and equipment, quality control and proficiency testing requirements. If we are found to be out of compliance with California statutory or regulatory standards, we may be subject to suspension, restriction or revocation of

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our laboratory license or assessed civil money penalties. The operator of a noncompliant laboratory may also be found guilty of a misdemeanor under California law. A finding of noncompliance, therefore, may result in harm to our business.

Other States’ Laboratory Licensing

Several states require the licensure of out-of-state laboratories that accept specimens from those states. We hold licenses from the states of Maryland, Pennsylvania and Rhode Island to test specimens from patients in those states or received from ordering physicians in those states. We are currently in the process of addressing the requirements for licensure in New York.

From time to time, other states may require out of state laboratories to obtain licensure in order to accept specimens from such states. If we identify any other state with such requirements or if we are contacted by any other state advising us of such requirements, we intend to follow instructions from the state regulators as to how we should comply with such requirements.

U.S. Food and Drug Administration

We perform our laboratory tests as LDTs. Historically; the FDA has exercised enforcement discretion with respect to most LDTs and has not required laboratories that offer LDTs to comply with the agency’s requirements for medical devices (e.g., establishment registration, device listing, quality systems regulations, premarket clearance or premarket approval, and post-market controls). In recent years, however, the FDA has stated it intends to end its policy of enforcement discretion and regulate certain LDTs as medical devices. To this end, on October 3, 2014, the FDA issued two draft guidance documents, entitled “Framework for Regulatory Oversight of Laboratory Developed Tests (LDTs)” and “FDA Notification and Medical Device Reporting for Laboratory Developed Tests (LDTs)”, respectively, that set forth a proposed risk-based regulatory framework that would apply varying levels of FDA oversight to LDTs. The FDA has indicated that it does not intend to modify its policy of enforcement discretion until the draft guidance documents are finalized. In January 2017, the FDA announced that final guidance on the oversight of LDTs would allow for further public discussion. On January 13, 2017 the FDA issued a “Discussion Paper on Laboratory Developed Tests (LDTs),” which states that the material in the document does not represent a final version of the LDT draft guidance documents that were published in 2014 or position of the FDA; rather, the document is a method to encourage additional dialogue. The timing of when, if at all, the draft guidance documents will be finalized is unclear, and even then, the new regulatory requirements are proposed to be phased-in consistent with the schedule set forth in the guidance. Nevertheless, the FDA may decide to regulate certain LDTs on a case-by-case basis at any time. LDTs with the same intended use as a cleared or approved companion diagnostic are defined in FDA’s draft guidance as “high-risk LDTs (Class III medical devices)” for which premarket review would be first to occur.

We provide our Target Selector Kit Product, ctDNA, EGFR, for research use only, or RUO, applications, although our customers may use these products to develop their own products that are subject to regulation by the FDA. RUO products fall under the FDA’s jurisdiction if they are used for clinical rather than research purposes. Consequently, our products are labeled “For Research Use Only.”  The FDA’s 2013 Guidance for Industry and Food and Drug Administration Staff on “Distribution of In Vitro Diagnostic Products Labeled for Research Use Only or Investigational Use Only,” explains that the FDA will review the totality of the circumstances when evaluating whether equipment and testing components are properly labeled as RUO. Merely including a labeling statement that a product is intended for research use only will not necessarily exempt the device from the FDA’s 510(k) clearance, premarket approval, or other requirements, if the circumstances surrounding the distribution of the product indicate that the manufacturer intends its product to be used for clinical diagnostic use. These circumstances may include written or verbal marketing claims or links to articles regarding a product’s performance in clinical applications, a manufacturer’s provision of technical support for clinical validation or clinical applications, or solicitation of business from clinical laboratories, all of which could be considered evidence of intended uses that conflict with RUO labeling.

Failure to comply with applicable FDA regulatory requirements may trigger a range of enforcement actions by the FDA including warning letters, civil monetary penalties, injunctions, criminal prosecution, recall or seizure, operating restrictions, partial suspension or total shutdown of production, and denial of or challenges to applications for clearance or approval, as well as significant adverse publicity.

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Other Regulatory Requirements

Our laboratory is subject to federal, state and local regulations relating to the handling and disposal of regulated medical waste, hazardous waste and biohazardous waste, including chemical, biological agents and compounds, blood and bone marrow samples and other human tissue. Typically, we use outside vendors who are contractually obligated to comply with applicable laws and regulations to dispose of such waste. These vendors are licensed or otherwise qualified to handle and dispose of such waste.

The Occupational Safety and Health Administration has established extensive requirements relating to workplace safety for health care employers, including requirements to develop and implement programs to protect workers from exposure to blood-borne pathogens by preventing or minimizing any exposure through needle stick or similar penetrating injuries.

Compliance Program

The health care industry is highly regulated and scrutinized with respect to fraud, abusive billing practices and improper financial relationships between health care companies and their referral sources. The Office of the Inspector General of HHS (the “OIG”) has published compliance guidance, including the Compliance Program Guidance for Clinical Laboratories in August of 1998, and advisory opinions. The Company has implemented a robust Compliance Program, which is overseen by our Board of Directors. Its objective is to ensure compliance with the myriad of federal and state laws, regulations and governmental guidance applicable to our business. Our program consists of training/education of employees and monitoring and auditing Company practices. The Board of Directors has formed a Compliance Committee of the Board, which meets regularly to discuss all compliance-related issues that may affect the Company. The Company reviews its policies and procedures as new regulations and interpretations come to light to comply with applicable regulations. The Chief Compliance Officer reports directly to the Compliance Committee.

Hotline

As part of its Compliance Program, the Company provides a hotline for employees who wish to anonymously or confidentially report suspected violations of our codes of conduct, policies/procedures, or laws and regulations. Employees are strongly encouraged to report any suspected violation if they do not feel the problem can be appropriately addressed through the normal chain of command. The hotline does not replace other resources available to our employees, including supervisors, managers and human resources staff, but is an alternative channel available. The hotline forwards all reports to the Compliance Officer who is responsible for investigating, reporting to the Compliance Committee, and documenting the disposition of each report. The hotline forwards any calls pertaining to the financial statements or financial issues to the Chairman of the Audit Committee. The Company does not allow any retaliation against an employee who reports a compliance related issue in good faith.

Confidentiality and Security of Personal Health Information

The Health Insurance Portability and Accountability Act of 1996, as amended (“HIPAA”), contains provisions that protect individually identifiable health information from unauthorized use or disclosure by covered entities and their business associates. The Office for Civil Rights of HHS, the agency responsible for enforcing HIPAA, has published regulations to address the privacy (the “Privacy Rule”) and security (the “Security Rule”) of protected health information (“PHI”). The Company is a covered entity under HIPAA and has adopted policies and procedures to comply with the Privacy Rule and the Security Rule and HIPAA. The health care facilities and providers that refer specimens to the Company are also bound by HIPAA.  HIPAA also requires that all providers who transmit claims for health care goods or services electronically utilize standard transaction and data sets and use standardized national provider identification codes. The Company has taken necessary steps to comply with HIPAA regulations, utilizes standard transaction data sets, and has obtained and implemented national provider identifiers, or NPIs, as the standard unique health identifier in filing and processing health care claims and other transactions.

The American Recovery and Reinvestment Act (“ARRA”) enacted the Health Information Technology for Economic and Clinical Health Act of 2009, or HITECH, which extends the scope of HIPAA to permit enforcement against business associates for a violation, establishes new requirements to notify the Office for Civil Rights of a breach of PHI, and allows

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the Attorneys General of the states to bring actions to enforce violations of HIPAA. Rules implementing various aspects of HIPAA are continuing to be promulgated. With respect to these rules, CMS requires all HIPAA-covered entities such as the Company to conduct electronic claim submissions and related electronic transactions under the HIPAA transaction standard called Version 5010.

In addition to the HIPAA Privacy Rule and Security Rule described above, the Company is subject to state laws regarding the handling and disclosure of patient records and patient health information. The HIPAA Privacy Rule and Security Rule regulations do not supersede state laws that may be more stringent; therefore, we are required to comply with both federal privacy and security regulations and varying state privacy and security laws and regulations. These laws vary widely. Penalties for violation include sanctions against a laboratory’s licensure as well as civil or criminal penalties. Additionally, private individuals may have a right of action against the Company for a violation of a state’s privacy laws. We believe we are in material compliance with current state laws regarding the confidentiality of health information and will continue to monitor and comply with new or changing state laws.

The Fair and Accurate Credit Transactions Act of 2003, enacted on December 4, 2003, directed the Federal Trade Commission to implement regulations to protect consumers against identity theft. The Federal Trade Commission issued what are referred to as the “Red Flag Rules”, but the effective date for enforcement was delayed several times. The Red Flag Rules were subject to enforcement as of January 1, 2012. The Red Flag Program Clarification Act of 2010 (“RFPCA”) gave some relief to health care providers by changing the definition of “creditor”, thereby narrowing the application to health care providers who do not otherwise obtain or use consumer reports or furnish information to consumer reporting agencies in connection with a credit transaction. Health care providers who act as a “creditor” to any of its patients with respect to a “covered account” are required to implement an identity theft protection program to safeguard patient information. A creditor includes any entity that regularly in the course of business obtains or uses consumer reports in connection with credit transactions, furnishes information to a consumer reporting agency in connection with a credit transaction, or advances funds to or on behalf of a person based on the person’s obligation to repay the funds or repayable from specific property pledged by or on behalf of the person. But, a creditor, as defined in the RFPCA, that advances funds on behalf of a person for expenses incidental to a service provided by the creditor to that person is not subject to the Red Flag Rules. The Company has developed a written program designed to identify and detect the relevant warning signs – or “red flags” – of identity theft and establish appropriate responses to prevent and mitigate identity theft in order to comply with the Red Flag Rules. We are also developing a plan to update the program, and the program will be managed by senior management staff under the policy direction of our Board of Directors. The Company intends to take such steps as necessary to determine the extent to which the Red Flag Rules apply to it and to take such steps as necessary to comply.

Employees

As of December 31, 2019, we had a total of 88 full-time employees, 9 of whom hold doctorate degrees and 11 of whom are engaged in full-time research and development activities, as well as 7 part-time employees. None of our employees is represented by a labor union.

Available Information

Our website address is www.biocept.com. We post links to our website to the following filings as soon as reasonably practicable after they are electronically filed with or furnished to the Securities and Exchange Commission, or the SEC: annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, proxy statements, and any amendments to those reports filed or furnished pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended. All such filings are available through our website free of charge. The SEC also maintains an internet site at www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

Company Information

We maintain our principal executive offices at 5810 Nancy Ridge Drive, San Diego, California 92121. Our telephone number is (858) 320-8200 and our website address is www.biocept.com. The information contained in, or that can be accessed through, our website is not incorporated into and is not part of this annual report. We were incorporated in California on May 12, 1997 and reincorporated as a Delaware corporation on July 30, 2013.

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Item 1A.Risk Factors

An investment in our securities involves a high degree of risk. You should consider carefully the risks described below, together with all of the other information included in this Annual Report, as well as in our other filings with the SEC, in evaluating our business. If any of the following risks actually occur, our business, financial condition, operating results and future prospects could be materially and adversely affected. In that case, the trading price of our common stock may decline and you might lose all or part of your investment. The risks described below are not the only ones we face. Additional risks that we currently do not know about or that we currently believe to be immaterial may also impair our business, financial condition, operating results and prospects. Certain statements below are forward-looking statements. For additional information, see the information included under the heading “Special Note Regarding Forward-Looking Statements.”

Risks Relating to Our Financial Condition and Capital Requirements

We are an early stage molecular oncology diagnostics company with a history of net losses; we expect to incur net losses in the future, and we may never achieve sustained profitability.

We have historically incurred substantial net losses, including net losses of $24.6 million and $25.1 million for the years ended December 31, 2018 and 2019, respectively, and we have never been profitable. At December 31, 2019, our accumulated deficit was approximately $245.7 million. Before 2008, we were pursuing a business plan relating to fetal genetic disorders and other fields, all of which were unrelated to cancer diagnostics. The portion of our accumulated deficit that relates to the period from inception through December 31, 2007 is approximately $66.5 million.

We expect our losses to continue as a result of costs relating to our laboratory operations as well as increased sales and marketing costs and ongoing research and development expenses. These losses have had, and will continue to have, an adverse effect on our working capital, total assets and stockholders’ equity. Because of the numerous risks and uncertainties associated with our commercialization efforts, we are unable to predict when we will become profitable, and we may never become profitable. Even if we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. Our inability to achieve and then maintain profitability would negatively affect our business, financial condition, results of operations and cash flows.

We need to raise additional capital to continue as a going concern.

We expect to continue to incur losses for the foreseeable future and will have to raise additional capital to fund our planned operations and to meet our long-term business objectives. As a result, there is substantial doubt about our ability to continue as a going concern unless we are able to successfully raise additional capital. Until we can generate significant cash from operations, including product and assay revenues, we expect to continue to fund our operations with the proceeds from offerings of our equity securities or debt, or transactions involving product development, technology licensing or collaboration. We can provide no assurances that any sources of a sufficient amount of financing will be available to us on favorable terms, if at all. Failure to raise additional capital in sufficient amounts would significantly impact our ability to continue as a going concern. The actual amount of funds that we will need and the timing of any such investment will be determined by many factors, some of which are beyond our control.

Risks Relating to Our Business and Strategy

If we are unable to increase sales of our current products, assays and services or successfully develop and commercialize other products, assays and services, our revenues will be insufficient for us to achieve profitability.

We currently derive substantially all of our revenues from sales of diagnostic assays. We began offering our assays through our Clinical Laboratory Improvement Amendments of 1988, or CLIA, certified, CAP accredited, and state-licensed laboratory in 2014. Additionally, the sale of our proprietary blood collection tubes, or BCTs commenced in June 2018, which allow for the intact transport of liquid biopsy samples for research use only, or RUO, from regions around the world. We are in varying stages of research and development for other products and diagnostic assays that we may offer. If we are unable to increase sales of our existing products and diagnostic assays or successfully develop and commercialize other products and diagnostic assays, we will not produce sufficient revenues to become profitable.

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If we are unable to execute our sales and marketing strategy for our products and diagnostic assays and are unable to gain acceptance in the market, we may be unable to generate sufficient revenue to sustain our business.

We are an early stage molecular oncology diagnostics company and have engaged in only limited sales and marketing activities for the diagnostic assays we currently offer through our CLIA-certified, CAP accredited, and state-licensed laboratory. To date, our revenue has been insufficient to fund operations.

Although we believe that our current assays and our planned future assays, as well as our BCT product, represent a promising commercial opportunity, our products or assays may never gain significant acceptance in the marketplace and therefore may never generate substantial revenue or profits for us. We will need to establish a market for our products and diagnostic assays and build that market through physician education, awareness programs and the publication of clinical trial results. Gaining acceptance in medical communities requires, among other things, publications in leading peer-reviewed journals of results from studies using our current products, assays and services and/or our planned future products, assays and services. The process of publication in leading medical journals is subject to a peer review process and peer reviewers may not consider the results of our studies sufficiently novel or worthy of publication. Failure to have our studies published in peer-reviewed journals would limit the adoption of our current products, assays and services and our planned future products, assays and services.

Our ability to successfully market the products and diagnostic assays that we have developed, and may develop in the future, will depend on numerous factors, including:

• conducting clinical utility studies of such assays in collaboration with key thought leaders to demonstrate their use and value in important medical decisions such as treatment selection;

• whether our current or future partners, vigorously support our offerings;

• the success of our sales force;

• whether healthcare providers believe such diagnostic assays provide clinical utility;

• whether the medical community accepts that such diagnostic assays are sufficiently sensitive and specific to be meaningful in-patient care and treatment decisions;

• our ability to continually source raw materials, BCTs, shipping kits and other products that we sell or consume in our manufacturing process that are of sufficient quality and supply;

• our ability to continue to fund planned sales and marketing activities; and

• whether private health insurers, government health programs and other third-party payers will adopt liquid biopsy-based assays in their guidelines, or cover such diagnostic assays and, if so, whether they will adequately reimburse us.

Failure to achieve widespread market acceptance of our current products, assays and services, as well as our planned future products, assays and services, would materially harm our business, financial condition and results of operations.

If we cannot develop products, assays and services to keep pace with rapid advances in technology, medicine and science, our operating results and competitive position could be harmed.

In recent years, there have been numerous advances in technologies relating to the diagnosis and treatment of cancer. Several new cancer drugs have been approved, and a number of new drugs in clinical development may increase patient survival time. There have also been advances in methods used to identify patients likely to benefit from these drugs based on analysis of biomarkers. We must continuously develop new products and diagnostic assays and enhance any existing products, assays and services to keep pace with evolving standards of care. Our current products, assays and services and our planned future products, assays and services could become obsolete unless we continually innovate and expand them to demonstrate benefit in the diagnosis, monitoring or prognosis of patients with cancer. New cancer therapies typically have only a few years of clinical data associated with them, which limits our ability to develop products and diagnostic assays based on, for example, biomarker analysis related to the appearance or development of resistance to those therapies. If we cannot adequately demonstrate the applicability of our current products, assays and services and our planned future products, assays and services to new treatments, by incorporating important biomarker analysis, sales of our products, assays and services could decline, which would have a material adverse effect on our business, financial condition and results of operations.

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If our current products, assays and services and our planned future products, assays and services do not continue to perform as expected, our operating results, reputation and business will suffer.

Our success depends on the market’s confidence that we can continue to provide reliable, high-quality products and assay results. We believe that our customers are likely to be particularly sensitive to product or assay defects and errors. As a result, the failure of our current or planned future products or assays to perform as expected, including with respect to our ability to maintain the sensitivity, specificity, concordance or reproducibility of such assays, would significantly impair our reputation and the public image of our products and cancer assays, and we may be subject to legal claims arising from any defects or errors.

If our sole laboratory facility becomes damaged or inoperable, or we are required to vacate the facility, our ability to sell and provide our products and diagnostic assays and pursue our research and development efforts may be jeopardized.

We currently derive our revenues from our diagnostic assays conducted in our CLIA-certified, CAP accredited, and state-licensed laboratory. We do not have any clinical reference laboratory facilities other than our facility in San Diego, California. Our facilities and equipment could be harmed or rendered inoperable by natural or man-made disasters, including fire, earthquake, flooding and power outages, which may render it difficult or impossible for us to sell our products or perform our diagnostic assays for some period of time. The inability to sell our current or planned future products, or to perform our current assays and our planned future assays, or the backlog of assays that could develop if our facility is inoperable for even a short period of time, may result in the loss of customers or harm to our reputation or relationships with scientific or clinical collaborators, and we may be unable to regain those customers or repair our reputation in the future. Furthermore, our facilities and the equipment we use to perform our research and development work could be costly and time-consuming to repair or replace.

The San Diego area has recently experienced serious fires and power outages and is considered to lie in an area with earthquake risk.

Additionally, a key component of our research and development process involves using biological samples as the basis for our diagnostic assay development. In some cases, these samples are difficult to obtain. If the parts of our laboratory facility where we store these biological samples were damaged or compromised, our ability to pursue our research and development projects, as well as our reputation, could be jeopardized. We carry insurance for damage to our property and the disruption of our business, but this insurance may not be sufficient to cover all of our potential losses and may not continue to be available to us on acceptable terms, if at all.

Further, if our CLIA-certified, CAP accredited, and state-licensed laboratory became inoperable we may not be able to license or transfer our technology to another facility with the necessary qualifications, including state licensure and CLIA certification, under the scope of which our current assays and our planned future assays could be performed. Even if we find a facility with such qualifications to perform our assays, it may not be available to us on commercially reasonable terms.

Our business is subject to risks arising from epidemic diseases, such as the recent global outbreak of the COVID-19 coronavirus.

The recent outbreak of the novel coronavirus, COVID-19, which has been declared by the World Health Organization to be a pandemic, has spread across the globe and is impacting worldwide economic activity. A pandemic, including COVID-19 or other public health epidemic, poses the risk that we or our employees, contractors, suppliers, courier delivery services and other partners may be prevented from conducting business activities for an indefinite period of time, including due to spread of the disease within these groups or due to shutdowns that may be requested or mandated by governmental authorities. While it is not possible at this time to estimate the impact that COVID-19 could have on our business, the COVID-19 pandemic and mitigation measures have had and may continue to have an adverse impact on global economic conditions which could have an adverse effect on our business and financial condition, including impairing our ability to raise capital when needed. The continued spread of COVID-19 and the measures taken by the governments of countries affected could disrupt the supply chain of material needed for our assays, interrupt our ability to receive samples, impair our ability to perform or deliver the results from our tests, impede patient movement or interrupt healthcare services causing a decrease in test volumes, delay coverage decisions from Medicare and third party payors, delay ongoing and planned clinical trials involving our tests and have a material adverse effect on our business, financial condition and results of operations. In addition, as we are located in California, we are currently under a shelter-in-place mandate and many of our clients

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worldwide are similarly impacted. As a healthcare provider, we are allowed to remain open in compliance with the shelter-in-place mandate and continue to provide critical information for patients diagnosed with cancer. While we are still receiving specimens from clients on a daily basis, we anticipate a potential slowdown in volume as many clinic visits are being re-scheduled and delayed. Moreover, the global outbreak of the COVID-19 coronavirus continues to rapidly evolve, and the extent to which the COVID-19 coronavirus may impact our business, results of operations and financial position will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the ultimate geographic spread of the disease, the duration of the outbreak, travel restrictions and social distancing in the United States and other countries, business closures or business disruptions, and the effectiveness of actions taken in the United States and other countries to contain and treat the disease.

If we cannot compete successfully with our competitors, we may be unable to increase or sustain our revenues or achieve and sustain profitability.

Our principal competition comes from mainstream diagnostic methods, used by medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians for many years, which focus on tumor tissue analysis. The methods or behavior of medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians may be difficult to change regarding the use of our CTC and ctDNA assays, including molecular diagnostic assays, in their practices in conjunction with or instead of tissue biopsies and analysis. In addition, companies offering capital equipment, BCTs, and kits or reagents to local pathology laboratories or laboratory supply distributors represent another source of potential competition. These kits are used directly by the pathologist, which can facilitate adoption. Historically, we have focused our marketing and sales efforts on medical oncologists rather than pathologists, although commencing in October 2017, our Empower TC offering provides the unique ability for pathologists to participate in the interpretation of liquid biopsy results and is available to pathology practices and hospital systems throughout the United States.

We also face competition from companies that offer products or are conducting research to develop products for CTC or ctDNA assays in various cancers. CTC and ctDNA products, assays and services represent a new area of science and we cannot predict what products or assays others will develop that may compete with or provide results similar or superior to the results we are able to achieve with the products or assays we develop. Competitors include but are not limited to companies such as Qiagen, Roche, Guardant Health, Cancer Genetics, Atossa, Agena Bioscience, Precipio, Illumina, Grail, Precision for Medicine, EPIC Sciences, Clearbridge Biomedics, Biodesix, Thermo Fisher Scientific, Foundation Medicine, Neogenomics, Cynvenio Biosystems, Genomic Health, Fluxion Biosciences, RareCells Diagnostics, ScreenCell, Menarini Silicon Biosystems, Alere (Adnagen), Sysmex, Natera, Inc., Circulogen, Angle PLC, Caris Life Sciences, Archer DX, DiaCarta and Tempus. Some of these groups, in addition to operating research and development laboratories, are establishing CLIA-certified testing laboratories while others are focused on selling equipment and reagents.

There are a number of companies which are focused on the oncology diagnostic market, who while not currently offering CTC or ctDNA assays are selling to the medical oncologists and pathologists and could develop or offer CTC or ctDNA assays. Large laboratory services companies such as Quest and LabCorp provide more generalized cancer diagnostic assays and testing but could also offer a CTC or ctDNA assay service. Companies like Abbott, Danaher and others could develop equipment or reagents in the future as well. Currently, companies like Streck, Roche and Exact Sciences offer BCTs, and in the future, companies like Covidien, Beckton Dickinson, Thermo Fisher, and other large medical device companies may develop BCTs as well.

There are a number of companies that are focused on the oncology diagnostic market such as Illumina, Biorad, Sysmex, Qiagen and Thermo Fisher Scientific that are selling equipment and reagents kits for ctDNA assays and assay panels to laboratories that are developing tests that are marketed to medical oncologists and pathologists.

Some of our present and potential competitors have widespread brand recognition and substantially greater financial and technical resources and development, production and marketing capabilities than we do. Others may develop lower-priced, less complex assays that payers, medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians could view as functionally equivalent to our current or planned future assays, which could force us to lower the list price of our assays and impact our operating margins and our ability to achieve and maintain profitability. In addition, technological innovations that result in the creation of enhanced products or diagnostic tools that are more sensitive or specific than ours may enable other clinical laboratories, hospitals, physicians or medical providers to provide specialized products or diagnostic assays similar to ours in a more patient-friendly, efficient or cost-effective manner than is currently possible. If we cannot compete successfully against current or future competitors, we may be unable to increase or create

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market acceptance and sales of our current or planned future products or assays, which could prevent us from increasing or sustaining our revenues or achieving or sustaining profitability.

We expect that biopharmaceutical companies will increasingly focus attention and resources on the personalized cancer diagnostic sector as the potential and prevalence of molecularly targeted oncology therapies approved by the FDA along with companion diagnostics increases. For example, the FDA has approved three such agents: Xalkori^® from Pfizer Inc. along with its companion anaplastic lymphoma kinase FISH test from Abbott Laboratories, Inc., Zelboraf^® from Daiichi-Sankyo/Genentech/Roche along with its companion BRAF kinase V600 mutation test from Roche Molecular Systems, Inc. and Tafinlar^® from GlaxoSmithKline along with its companion BRAF kinase V600 mutation test from bioMerieux. Since companion diagnostic tests are part of FDA labeling, non-FDA cleared tests such as ours would be considered an off-label use and this may limit our access to this market segment.

Additionally, projects related to cancer diagnostics and particularly genomics have received increased government funding, both in the United States and internationally. As more information regarding cancer genomics becomes available to the public, we anticipate that more products aimed at identifying targeted treatment options will be developed and that these products may compete with ours. In addition, competitors may develop their own versions of our current or planned future products or assays in countries where we did not apply for patents or where our patents have not issued and compete with us in those countries, including encouraging the use of their product or assay by physicians or patients in other countries.

We expect to continue to incur significant expenses to develop and market products and diagnostic assays, which could make it difficult for us to achieve and sustain profitability.

In recent years, we have incurred significant costs in connection with the development of our products and diagnostic assays. For the years ended December 31, 2018 and 2019, our research and development expenses were $4.5 million and $4.7 million, respectively, and our sales and marketing expenses were $5.9 million and $5.9 million, respectively. We expect our expenses to continue to increase for the foreseeable future as we conduct studies of our current products, assays and services and our planned future products, assays and services, continue to establish our sales and marketing organization, drive adoption of and reimbursement for our products and diagnostic assays and develop new products, assays and services. As a result, we need to generate significant revenues in order to achieve sustained profitability.

If medical oncologists, surgical oncologists, urologists,pulmonologists, pathologists and other physiciansdecide not to order our current or planned future assays, or if laboratory supply distributors or their customers decide not to order our current or planned future products, we may be unable to generate sufficient revenue to sustain our business.

To generate demand for our current products, assays and services and our planned future products, assays and services, we will need to educate medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists, and other physicians and other health care professionals, as well as laboratory and medical equipment suppliers, on the clinical utility, benefits and value of the products, assays and services we provide through published papers, presentations at scientific conferences, educational programs and one-on-one education sessions by members of our sales force. In addition, we need to educate medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians of our ability to obtain and maintain coverage and adequate reimbursement from third-party payers. We need to hire additional commercial, scientific, technical and other personnel to support this process. Unless an adequate number of medical practitioners order our current assays and our planned future assays, or unless an adequate number of laboratory supply distributors order our current and planned future products, we will likely be unable to create demand in sufficient volume for us to achieve sustained profitability.

Clinical utility studies are important in demonstrating to both customers and payers an assay’s clinical relevance and value. If we are unable to identify collaborators willing to work with us to conduct clinical utility studies, or the results of those studies do not demonstrate that an assay provides clinically meaningful information and value, commercial adoption of such assay may be slow, which would negatively impact our business.

Clinical utility studies show when and how to use a clinical test or assay and describe the particular clinical situations or settings in which it can be applied and the expected results. Clinical utility studies also show the impact of the test or assay results on patient care and management. Clinical utility studies are typically performed with collaborating oncologists or other physicians at medical centers and hospitals, analogous to a clinical trial, and generally result in peer-reviewed publications. Sales and marketing representatives use these publications to demonstrate to customers how to use a clinical test

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or assay, as well as why they should use it. These publications are also used with payers to obtain coverage for a test or assay, helping to assure there is appropriate reimbursement.

We need to conduct additional studies for our assays, increase assay adoption in the marketplace and obtain coverage and adequate reimbursement. Should we not be able to perform these studies, or should their results not provide clinically meaningful data and value for medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians, adoption of our assays could be impaired, and we may not be able to obtain coverage and adequate reimbursement for them.

The loss of key members of our executive management team could adversely affect our business.

Our success in implementing our business strategy depends largely on the skills, experience and performance of key members of our executive management team and others in key management positions, including Michael W. Nall, our Chief Executive Officer and President, Lyle J. Arnold, Ph.D., our Senior Vice-President of Research & Development and Chief Scientific Officer, Michael Terry, our Senior Vice President Corporate Development, and Timothy C. Kennedy, our Chief Financial Officer, Senior Vice President of Operations and Secretary. The collective efforts of each of these persons and others working with them as a team are critical to us as we continue to develop our technologies, products, services, assays and research and development and sales programs. As a result of the difficulty in locating qualified new management, the loss or incapacity of existing members of our executive management team could adversely affect our operations. If we were to lose one or more of these key employees, we could experience difficulties in finding qualified successors, competing effectively, developing our technologies and implementing our business strategy. Our executive management team each have employment agreements, however, the existence of an employment agreement does not guarantee retention of members of our executive management team and we may not be able to retain those individuals for the duration of or beyond the end of their respective terms. We do not maintain “key person” life insurance on any of our employees.

In addition, we rely on collaborators, consultants and advisors, including scientific and clinical advisors, to assist us in formulating our research and development and commercialization strategy. Our collaborators, consultants and advisors are generally employed by employers other than us and may have commitments under agreements with other entities that may limit their availability to us.

The loss of a key employee, the failure of a key employee to perform in his or her current position or our inability to attract and retain skilled employees could result in our inability to continue to grow our business or to implement our business strategy.

There is a scarcity of experienced professionals in our industry. If we are not able to retain and recruit personnel with the requisite technical skills, we may be unable to successfully execute our business strategy.

The specialized nature of our industry results in an inherent scarcity of experienced personnel in the field. Our future success depends upon our ability to attract and retain highly skilled personnel, including scientific, technical, commercial, business, regulatory and administrative personnel, necessary to support our anticipated growth, develop our business and perform certain contractual obligations. Given the scarcity of professionals with the scientific knowledge that we require and the competition for qualified personnel among life science businesses, we may not succeed in attracting or retaining the personnel we require to continue and grow our operations.

Our failure to continue to attract, hire and retain a sufficient number of qualified sales professionals would hamper our ability to increase demand for our products and diagnostic assays, to expand geographically and to successfully commercialize any other products or assays we may develop.

To succeed in selling our products and diagnostic assays and any other products or assays that we are able to develop, we must expand our sales force in the United States and/or internationally by recruiting additional sales representatives with extensive experience in oncology and established relationships with medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists, oncology nurses, and other physicians and hospital personnel, as well as laboratory supply distributors. To achieve our marketing and sales goals, we will need to continue to build our sales and commercial infrastructure. Sales professionals with the necessary technical and business qualifications are in high demand, and there is a risk that we may be unable to attract, hire and retain the number of sales professionals with the right qualifications, scientific backgrounds and relationships with decision-makers at potential customers needed to achieve our sales goals. We expect to

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face competition from other companies in our industry, some of whom are much larger than us and who can pay greater compensation and benefits than we can, in seeking to attract and retain qualified sales and marketing employees. If we are unable to hire and retain qualified sales and marketing personnel, our business will suffer.

Our dependence on commercialization partners for sales of products, assays and services could limit our success in realizing revenue growth.

We intend to grow our business through the use of commercialization partners for the sales, marketing and commercialization of our current products, assays and services, as well as our planned future products, assays and services, and to do so we must enter into agreements with these partners to sell, market or commercialize our products, assays and services. These agreements may contain exclusivity provisions and generally cannot be terminated without cause during the term of the agreement. We may need to attract additional partners to expand the markets in which we sell products or assays. These partners may not commit the necessary resources to market and sell our products and diagnostics assays to the level of our expectations, and we may be unable to locate suitable alternatives should we terminate our agreement with such partners or if such partners terminate their agreement with us.

If current or future commercialization partners do not perform adequately, or we are unable to locate commercialization partners, we may not realize revenue growth.

We depend on third parties for the supply of blood samples and other biological materials that we use in our research and development efforts. If the costs of such samples and materials increase or our third-party suppliers terminate their relationship with us, our business may be materially harmed.

We have relationships with suppliers and institutions that provide us with blood samples and other biological materials that we use in developing and validating our current assays and our planned future assays. If one or more suppliers terminate their relationship with us or are unable to meet our requirements for samples, we will need to identify other third parties to provide us with blood samples and biological materials, which could result in a delay in our research and development activities and negatively affect our business. In addition, as we grow, our research and academic institution collaborators may seek additional financial contributions from us, which may negatively affect our results of operations.

We currently rely on third-party suppliers for our BCTs, shipping kits, and critical materials needed to perform our current assays, as well as our planned future products, assays and services, and any problems experienced by them could result in a delay or interruption of their supply to us.

We currently purchase our BCTs and raw materials for our microfluidic channels and assay reagents under purchase orders and do not have long-term contracts with most of the suppliers of these materials. If suppliers were to delay or stop producing our BCTs, shipping kits, materials or reagents, or if the prices they charge us were to increase significantly, or if they elected not to sell to us, we would need to identify other suppliers. We could experience delays in obtaining BCTs and shipping kits, manufacturing the microfluidic channels, or performing assays while finding another acceptable supplier, which could impact our results of operations. The changes could also result in increased costs associated with qualifying the new BCTs, shipping kits, materials or reagents and in increased operating costs. Further, any prolonged disruption in a supplier’s operations could have a significant negative impact on our ability to perform diagnostic assays in a timely manner and sell our products.

Some of the components used in our current or planned future products are currently sourced from a supplier for which alternative suppliers exist but we have not validated the products of such alternative suppliers, and substitutes for these components might not be able to be obtained easily or may require substantial design or manufacturing modifications. Any significant problem experienced by any one of our suppliers may result in a delay or interruption in the supply of components to us until that supplier cures the problem or an alternative source of the component is located and qualified. Any delay or interruption would likely lead to a delay or interruption in our manufacturing operations or product sales. The inclusion of substitute components must meet our product specifications and could require us to qualify the new supplier with the appropriate government regulatory authorities.

If we were sued for product liability or professional liability, we could face substantial liabilities that exceed our resources.

The marketing, sale and use of our products and current assays, as well our planned future products, assays and services, could lead to the filing of product liability claims against us if someone alleges that our products or assays failed to perform

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as designed. We may also be subject to liability for errors in the assay results we provide to physicians or for a misunderstanding of, or inappropriate reliance upon, the information we provide. A product liability or professional liability claim could result in substantial damages and be costly and time-consuming for us to defend.

Although we believe that our existing product and professional liability insurance is adequate, our insurance may not fully protect us from the financial impact of defending against product liability or professional liability claims. Any product liability or professional liability claim brought against us, with or without merit, could increase our insurance rates or prevent us from securing insurance coverage in the future. Additionally, any product liability lawsuit could damage our reputation, result in the recall of products or assays, or cause current partners to terminate existing agreements and potential partners to seek other partners, any of which could impact our results of operations.

If we use biological and hazardous materials in a manner that causes injury, we could be liable for damages.

Our activities currently require the controlled use of potentially harmful biological materials and chemicals. We cannot eliminate the risk of accidental contamination or injury to employees or third parties from the use, storage, handling or disposal of these materials. In the event of contamination or injury, we could be held liable for any resulting damages, and any liability could exceed our resources or any applicable insurance coverage we may have. Additionally, we are subject to, on an ongoing basis, federal, state and local laws and regulations governing the use, storage, handling and disposal of these materials and specified waste products. The cost of compliance with these laws and regulations may become significant and could have a material adverse effect on our financial condition, results of operations and cash flows. In the event of an accident or if we otherwise fail to comply with applicable regulations, we could lose our permits or approvals or be held liable for damages or penalized with fines.

We may acquire other businesses or form joint ventures or make investments in other companies or technologies that could harm our operating results, dilute our stockholders’ ownership, increase our debt or cause us to incur significant expense.

As part of our business strategy, we may pursue acquisitions of businesses and assets. We also may pursue strategic alliances and joint ventures that leverage our core technology and industry experience to expand our offerings or distribution. We have no experience with acquiring other companies and limited experience with forming strategic alliances and joint ventures. We may not be able to find suitable partners or acquisition candidates, and we may not be able to complete such transactions on favorable terms, if at all. If we make any acquisitions, we may not be able to integrate these acquisitions successfully into our existing business, and we could assume unknown or contingent liabilities. Any future acquisitions also could result in significant write-offs or the incurrence of debt and contingent liabilities, any of which could have a material adverse effect on our financial condition, results of operations and cash flows. Integration of an acquired company also may disrupt ongoing operations and require management resources that would otherwise focus on developing our existing business. We may experience losses related to investments in other companies, which could have a material negative effect on our results of operations. We may not identify or complete these transactions in a timely manner, on a cost-effective basis, or at all, and we may not realize the anticipated benefits of any acquisition, technology license, strategic alliance or joint venture.

To finance any acquisitions or joint ventures, we may choose to issue shares of our common stock as consideration, which would dilute the ownership of our stockholders. If the price of our common stock is low or volatile, we may not be able to acquire other companies or fund a joint venture project using our stock as consideration. Alternatively, it may be necessary for us to raise additional funds for acquisitions through public or private financings. Additional funds may not be available on terms that are favorable to us, or at all.

If we cannot support demand for our current products, assays and services, as well as our planned future products, assays and services, including successfully managing the evolution of our laboratory service, our business could suffer.

As our product and assay volume grows, we will need to increase our assay capacity, implement automation, increase our scale and related processing, customer service, billing, collection and systems process improvements and expand our internal quality assurance program and technology to support assays on a larger scale. Examples of challenges we may face include, but are not limited to, maintaining the same validated sensitivity in our assays for both CTC and ctDNA analysis as our assay volume increases. We will also need additional clinical laboratory scientists and other scientific and technical personnel to process these additional assays. Any increases in scale, related improvements and quality assurance may not be successfully implemented and appropriate personnel may not be available. As additional products, assays and services are

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commercialized, we may need to bring new equipment on line, implement new systems, technology, controls and procedures and hire personnel with different qualifications. Failure to implement or maintain necessary procedures or to hire the necessary personnel could result in a higher cost of processing or an inability to meet market demand. We cannot assure you that we will be able to perform assays on a timely basis, or procure BCTs, shipping kits or other materials we sell, at a level consistent with demand, that our efforts to scale our commercial operations will not negatively affect the quality of our assay results, or that we will respond successfully to the growing complexity of our operations. If we encounter difficulty meeting market demand or quality standards for our current products, assays and services and our planned future products, assays and services, including with respect to our assays our ability to maintain the sensitivity, specificity, concordance and reproducibility of such assays, our reputation could be harmed, and our future prospects and business could suffer, which may have a material adverse effect on our financial condition, results of operations and cash flows.

Billing for our diagnostic assays is complex, and we must dedicate substantial time and resources to the billing process to be paid.

Billing for clinical laboratory assay services is complex, time-consuming and expensive. Depending on the billing arrangement and applicable law, we bill various payers, including Medicare, insurance companies and patients, all of which have different billing requirements. We generally bill third-party payers for our diagnostic assays and pursue reimbursement on a case-by-case basis where pricing contracts are not in place. To the extent laws or contracts require us to bill patient co-payments or co-insurance, we must also comply with these requirements. We may also face increased risk in our collection efforts, including potential write-offs of doubtful accounts and long collection cycles, which could adversely affect our business, results of operations and financial condition.

Several factors make the billing process complex, including:

• differences between the list price for our assays and the reimbursement rates of payers;

• compliance with complex federal and state regulations related to billing Medicare;

• risk of government audits related to billing Medicare;

• disputes among payers as to which party is responsible for payment;

• differences in coverage and in information and billing requirements among payers, including the need for prior authorization and/or advanced notification;

• the effect of patient co-payments or co-insurance;

• changes to billing codes and/or coverage policies that apply to our assays;

• incorrect or missing billing information; and

• the resources required to manage the billing and claims appeals process.

We use standard industry billing codes, known as Current Procedural Terminology, or CPT, codes, to bill for our diagnostic assays. These codes can change over time. When codes change, there is a risk of an error being made in the claim adjudication process. These errors can occur with claims submission, third-party transmission or in the processing of the claim by the payer. Claim adjudication errors may result in a delay in payment processing or a reduction in the amount of the payment received. Coding changes, therefore, may have an adverse effect on our revenues. There can be no assurance that payers will recognize these codes in a timely manner or that the process of transitioning to such a code and updating their billing systems and ours will not result in errors, delays in payments and a related increase in accounts receivable balances.

As we introduce new assays, we will need to add new codes to our billing process as well as our financial reporting systems. Failure or delays in effecting these changes in external billing and internal systems and processes could negatively affect our collection rates, revenue and cost of collecting.

Additionally, our billing activities require us to implement compliance procedures and oversight, train and monitor our employees, challenge coverage and payment denials, assist patients in appealing claims, and undertake internal audits to evaluate compliance with applicable laws and regulations as well as internal compliance policies and procedures. Payers also conduct external audits to evaluate payments, which add further complexity to the billing process. If the payer makes an overpayment determination, there is a risk that we may be required to return some portion of prior payments we have

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received. These billing complexities, and the related uncertainty in obtaining payment for our assays, could negatively affect our revenue and cash flow, our ability to achieve profitability, and the consistency and comparability of our results of operations.

We rely on third-party billing provider software, and an in-house billing function, to transmit claims to payers, and any delay in transmitting claims could have an adverse effect on our revenue.

While we manage the overall processing of claims, we rely on third-party billing provider software to transmit the actual claims to payers based on the specific payer billing format. We have previously experienced delays in claims processing when our third-party provider made changes to its invoicing system. Additionally, coding for diagnostic assays may change, and such changes may cause short-term billing errors that may take significant time to resolve. If claims are not submitted to payers on a timely basis or are erroneously submitted, or if we are required to switch to a different software provider to handle claim submissions, we may experience delays in our ability to process these claims and receipt of payments from payers, or possibly denial of claims for lack of timely submission, which would have an adverse effect on our revenue and our business.

We may encounter manufacturing problems or delays that could result in lost revenue.

We currently manufacture our proprietary microfluidic channels at our San Diego facility and intend to continue to do so. We believe we currently have adequate manufacturing capacity for our microfluidic channels. If demand for our current products, assays and services and our planned future products, assays and services increases significantly, we will need to either expand our manufacturing capabilities or outsource to other manufacturers. If we or third-party manufacturers engaged by us fail to manufacture and deliver our microfluidic channels or certain reagents in a timely manner, our relationships with our customers could be seriously harmed. We cannot assure you that manufacturing, or quality control problems will not arise as we attempt to increase the production of our microfluidic channels or reagents or that we can increase our manufacturing capabilities and maintain quality control in a timely manner or at commercially reasonable costs. If we cannot manufacture our microfluidic channels consistently on a timely basis because of these or other factors, it could have a significant negative impact on our ability to perform assays and generate revenues.

International expansion of our business would expose us to business, regulatory, political, operational, financial and economic risks associated with doing business outside of the United States.

Our business strategy is to pursue increased international expansion, including partnering with academic and commercial testing laboratories, and introducing our technology outside the United States as part of IVD test kits and/or testing systems utilizing our technologies. Doing business internationally involves a number of risks, including:

• multiple, conflicting and changing laws and regulations such as tax laws, export and import restrictions, employment laws, regulatory requirements and other governmental approvals, permits and licenses;

• failure by us or our distributors to obtain regulatory approvals for the sale or use of our current products or assays and our planned future products or assays in various countries;

• difficulties in managing foreign operations;

• complexities associated with managing government payer systems, multiple payer-reimbursement regimes or self-pay systems;

• logistics and regulations associated with shipping blood samples, including infrastructure conditions and transportation delays;

• limits on our ability to penetrate international markets if our current products or assays and our planned future products or assays cannot be processed by an appropriately qualified local laboratory;

• financial risks, such as longer payment cycles, difficulty enforcing contracts and collecting accounts receivable and exposure to foreign currency exchange rate fluctuations;

• reduced protection for intellectual property rights, or lack of them in certain jurisdictions, forcing more reliance on our trade secrets, if available;

• natural disasters, political and economic instability, including wars, terrorism and political unrest, outbreak of disease, boycotts, curtailment of trade and other business restrictions; and

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• failure to comply with the Foreign Corrupt Practices Act, including its books and records provisions and its anti-bribery provisions, by maintaining accurate information and control over sales activities and distributors’ activities.

Any of these risks, if encountered, could significantly harm our future international expansion and operations and consequently, have a material adverse effect on our financial condition, results of operations and cash flows.

General economic or business conditions may have a negative impact on our business.

Continuing concerns over United States health care reform legislation and energy costs, geopolitical issues, the availability and cost of credit and government stimulus programs in the United States and other countries have contributed to increased volatility and diminished expectations for the global economy. These factors, combined with low business and consumer confidence and high unemployment, precipitated an economic slowdown and recession. If the economic climate deteriorates, our business, including our access to patient samples and the addressable market for products or diagnostic assays that we may successfully develop, as well as the financial condition of our suppliers and our third-party payers, could be adversely affected, resulting in a negative impact on our business, financial condition and results of operations.

Intrusions into our computer systems could result in compromise of confidential information.

Despite the implementation of security measures, our technology or systems that we interface with, including the Internet and related systems, may be vulnerable to physical break-ins, hackers, improper employee or contractor access, computer viruses, programming errors, or similar problems. Any of these might result in confidential medical, business or other information of other persons or of ourselves being revealed to unauthorized persons.

There are a number of state, federal and international laws protecting the privacy and security of health information and personal data. The Health Information Technology for Economic and Clinical Health Act of 2009, or HITECH, amended the privacy and security provisions of the Health Insurance Portability and Accountability Act, or HIPAA. HIPAA imposes limitations on the use and disclosure of an individual’s healthcare information by certain healthcare providers, healthcare clearinghouses, and health insurance plans, collectively referred to as covered entities, and also grants individuals rights with respect to their health information. HIPAA also imposes compliance obligations and corresponding penalties for non-compliance on individuals and entities that provide services involving the creation, receipt, maintenance or transmission of individually identifiable health information for or on behalf of covered entities, collectively referred to as business associates. HITECH also made significant increases in the penalties for improper use or disclosure of an individual’s health information under HIPAA and extended enforcement authority to state attorneys general. As amended by HITECH and subsequently by the final omnibus rule adopted in 2013, or Final Omnibus Rule, HIPAA also imposes notification requirements on covered entities in the event that certain health information has been inappropriately accessed or disclosed: notification requirements to individuals, federal regulators, and in some cases, notification to local and national media. Notification is not required under HIPAA if the health information that is improperly used or disclosed is deemed secured in accordance with encryption or other standards developed by the U.S. Department of Health and Human Services, or HHS. Most states have laws requiring notification of affected individuals and/or state regulators in the event of a breach of personal information, which is a broader class of information than the health information protected by HIPAA. Many state laws impose significant data security requirements, such as encryption or mandatory contractual terms to ensure ongoing protection of personal information. Activities outside of the United States implicate local and national data protection standards, impose additional compliance requirements and generate additional risks of enforcement for non-compliance.  For example, if we obtain certain personal information regarding residents in the European Union, we may be subject to the European Union General Data Protection Regulation. We may be required to expend significant capital and other resources to ensure ongoing compliance with applicable privacy and data security laws, to protect against security breaches and hackers or to alleviate problems caused by such breaches.

We depend on our information technology and telecommunications systems, and any failure of these systems could harm our business.

We depend on information technology and telecommunications systems for significant aspects of our operations. In addition, our third-party billing software provider depends upon telecommunications and data systems provided by outside vendors and information we provide on a regular basis. These information technology and telecommunications systems support a variety of functions, including assay processing, sample tracking, quality control, customer service and support, billing and reimbursement, research and development activities and our general and administrative activities. Information technology

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and telecommunications systems are vulnerable to damage from a variety of sources, including telecommunications or network failures, malicious human acts and natural disasters. Moreover, despite network security and back-up measures, some of our servers are potentially vulnerable to physical or electronic break-ins, computer viruses and similar disruptive problems. Despite the precautionary measures we have taken to prevent unanticipated problems that could affect our information technology and telecommunications systems, failures or significant downtime of our information technology or telecommunications systems or those used by our third-party service providers could prevent us from processing assays, providing assay results to medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists, other physicians, billing payers, processing reimbursement appeals, handling patient or physician inquiries, conducting research and development activities and managing the administrative aspects of our business. Any disruption or loss of information technology or telecommunications systems on which critical aspects of our operations depend could have an adverse effect on our business.

Regulatory Risks Relating to Our Business

Healthcare policy changes, including recently enacted legislation reforming the U.S. health care system, may have a material adverse effect on our financial condition, results of operations and cash flows.

The Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act, or collectively the ACA, enacted in March 2010, makes a number of substantial changes in the way health care is financed by both governmental and private insurers.

Although some of these provisions may negatively impact payment rates for clinical laboratory tests, the ACA also extends coverage to over 30 million previously uninsured people, which resulted in an increase in the demand for our current assays and our planned future assays. There remain judicial and Congressional challenges to certain aspects of the ACA, as well as efforts by the Trump administration to repeal or replace certain aspects of the ACA.Since January 2017, the President of the United States has signed two executive orders and other directives designed to delay, circumvent, or loosen certain requirements mandated by the ACA. Concurrently, Congress has considered legislation that would repeal or repeal and replace all or part of the ACA. While Congress has not passed repeal legislation, it has enacted laws that modify certain provisions of the ACA such as removing penalties effective January 1, 2019, for not complying with the ACA’s individual mandate to carry health insurance and eliminating the implementation of certain ACA-mandated fees, including but not limited the Medical Device Excise Tax. On December 14, 2018, a Texas U.S. District Court Judge ruled that the ACA is unconstitutional in its entirety because the “individual mandate” was repealed by Congress as part of the Tax Cuts and Jobs Act of 2017. Additionally, on December 18, 2019, the U.S. Court of Appeals for the 5th Circuit upheld the District Court ruling that the individual mandate was unconstitutional and remanded the case back to the District Court to determine whether the remaining provisions of the ACA are invalid as well. On March 2, 2020, the United States Supreme Court granted the petitions for writs of certiorari to review this case and has allotted one hour for oral arguments. It is unclear how this decision, subsequent appeals, and other efforts to repeal and replace the ACA will impact the ACA.

In addition, other legislative changes have been proposed and adopted since the ACA was enacted. The Protecting Access to Medicare Act of 2014, or PAMA, was signed to law, which, among other things, significantly altered the current payment methodology under the CLFS. Under the new law, issued in 2016 and the reporting period beginning in 2017 and every three years thereafter (or annually in the case of advanced diagnostic laboratory tests), applicable clinical laboratories must report laboratory test payment data for each Medicare-covered clinical diagnostic laboratory test that it furnishes during the specified time period. The reported data must include the payment rate (reflecting all discounts, rebates, coupons and other price concessions) and the volume of each test that was paid by each private payer (including health insurance issuers, group health plans, Medicare Advantage plans and Medicaid managed care organizations). Effective January 1, 2018, the Medicare payment rate for each clinical diagnostic laboratory test is equal to the weighted median amount for the test from the most recent data collection period. The payment rate applies to laboratory tests furnished by a hospital laboratory if the test is separately paid under the hospital outpatient prospective payment system. The PAMA rate changes to our tests that were impacted did not materially affect our payments beginning in 2018; however, we cannot predict how this may change future payment in coming years. Also, under PAMA, the Centers for Medicare & Medicaid Services, or CMS, is required to adopt temporary billing codes to identify new tests and new advanced diagnostic laboratory tests that have been cleared or approved by the FDA. For an existing test that is cleared or approved by the FDA and for which Medicare payment is made as of April 1, 2014, CMS is required to assign a unique billing code if one has not already been assigned by the agency. In addition to assigning the code, CMS is required to publicly report payment for the tests. Further, under PAMA, CMS is required to adopt temporary billing codes to identify new tests and new advanced diagnostic laboratory tests that have been

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cleared or approved by the FDA. We cannot determine at this time the full impact of PAMA on our business, financial condition and results of operations.

Additionally, the Budget Control Act of 2011, among other things, created the Joint Select Committee on Deficit Reduction to recommend proposals in spending reductions to Congress. The Joint Select Committee did not achieve its targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, triggering the legislation’s automatic reduction to several government programs. This includes aggregate reductions to Medicare payments to providers and suppliers of up to 2% per fiscal year, starting in 2013, and, due to subsequent legislative amendments to the statute, will remain in effect through 2029 unless additional congressional action is taken. The full impact on our business the sequester law is uncertain. In addition, the Middle-Class Tax Relief and Job Creation Act of 2012, or MCTRJCA, mandated an additional change in Medicare reimbursement for clinical laboratory tests.

Some of our laboratory assay business is subject to the Medicare Physician Fee Schedule and, under the current statutory formula, the rates for these services are updated annually. For the past several years, the application of the statutory formula would have resulted in substantial payment reductions if Congress failed to intervene. In the past, Congress passed interim legislation to prevent the decreases. If Congress fails to intervene to prevent the negative update factor in future years, the resulting decrease in payment may adversely affect our revenue and results of operations. If in future years Congress does not adopt interim legislation to block or offset, and/or CMS does not moderate, any substantial CMS-proposed reimbursement reductions, the resulting decrease in payments from Medicare could adversely impact our revenues and results of operations.

We cannot predict whether future health care initiatives will be implemented at the federal or state level, or how any future legislation or regulation may affect us. The expansion of government’s role in the U.S. health care industry, and changes to the reimbursement amounts paid by Medicare and other payers for our current assays and our planned future assays, may reduce our profits, if any, and have a materially adverse effect on our business, financial condition, results of operations and cash flows. Moreover, Congress has proposed on several occasions to impose a 20% coinsurance payment requirement on patients for clinical laboratory tests reimbursed under the Medicare Clinical Laboratory Fee Schedule, which would require us to bill patients for these amounts. In the event that Congress were to ever enact such legislation, the cost of billing and collecting for our assays could often exceed the amount actually received from the patient.

Our commercial success could be compromised if hospitals or other clients do not pay our invoices or if third-party payers, including managed care organizations and Medicare, do not provide coverage and reimbursement, breach, rescind or modify their contracts or reimbursement policies or delay payments for our current assays and our planned future assays.

Medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians may not order our current assays and our planned future assays unless third-party payers, such as managed care organizations and government payers (e.g., Medicare and Medicaid), pay a substantial portion of the assay price. Coverage and reimbursement by a third-party payer may depend on a number of factors, including a payer’s determination that assays using our technologies are:

• not experimental or investigational;

• medically necessary;

• appropriate for the specific patient;

• cost-effective;

• supported by peer-reviewed publications; and

• included in clinical practice guidelines.

Uncertainty surrounds third-party payer coverage and adequate reimbursement of any test incorporating new technology, including tests developed using our technologies. Technology assessments of new medical tests conducted by research centers and other entities may be disseminated to interested parties for informational purposes. Third-party payers and health care providers may use such technology assessments as grounds to deny coverage for a test or procedure. Technology assessments can include evaluation of clinical utility studies, which define how a test is used in a particular clinical setting or situation.

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Because each payer generally determines for its own enrollees or insured patients whether to cover or otherwise establish a policy to reimburse our diagnostic assays, seeking payer approvals is a time-consuming and costly process. We cannot be certain that coverage for our current assays and our planned future assays will be provided in the future by additional third-party payers or that existing agreements, policy decisions or reimbursement levels will remain in place or be fulfilled under existing terms and provisions. If we cannot obtain coverage and adequate reimbursement from private and governmental payers such as Medicare and Medicaid for our current assays, or new assays or assay enhancements that we may develop in the future, our ability to generate revenues could be limited, which may have a material adverse effect on our financial condition, results of operations and cash flow. Further, we may experience delays and interruptions in the receipt of payments from third-party payers due to missing documentation and/or other issues, which could cause delay in collecting our revenue.

In addition, to the extent that our assays are ordered for Medicare inpatients and outpatients, only the hospital may receive payment from the Medicare program for the technical component of pathology services and any clinical laboratory services that we perform, unless the testing is ordered at least 14 days after discharge and certain other requirements are met. We therefore must look to the hospital for payment for these services under these circumstances. If hospitals refuse to pay for the services or fail to pay in a timely manner, our ability to generate revenues could be limited, which may have a material adverse effect on our financial condition, results of operations and cash flow.

We expect to depend on Medicare and a limited number of private payers for a significant portion of our revenues and if these or other payers stop providing reimbursement or decrease the amount of reimbursement for our current assays and our planned future assays, our revenues could decline.

Approximately 39% and 38% of total net revenues during the years ended December 31, 2018 and 2019, respectively, were associated with Medicare reimbursement. Approximately 11% and 21% of total net revenues during the years ended December 31, 2018 and 2019, respectively, were associated with Blue Cross Blue Shield reimbursement, and approximately 17% and 8% of total net revenues for the years ended December 31, 2018 and 2019, respectively, were associated with United Healthcare reimbursement. We cannot assure you that, even if our current assays and our planned future assays are otherwise successful, reimbursement for the currently Medicare, Blue Cross Blue Shield, and United Healthcare covered-portions of our current assays and our planned future assays would, without such contracted payer reimbursement for the capture/enumeration portion, produce sufficient revenues to enable us to reach profitability and achieve our other commercial objectives.

Medicare and other third-party payers may change their coverage policies or cancel future contracts with us at any time, review and adjust the rate of reimbursement or stop paying for our assays altogether, which would reduce our total revenues. Payers have increased their efforts to control the cost, utilization and delivery of health care services. In the past, measures have been undertaken to reduce payment rates for and decrease utilization of clinical laboratory testing generally. Because of the cost-trimming trends, third-party payers that currently cover and provide reimbursement for our current assays and our planned future assays may suspend, revoke or discontinue coverage at any time, or may reduce the reimbursement rates payable to us. Any such action could have a negative impact on our revenues, which may have a material adverse effect on our financial condition, results of operations and cash flows.

In addition, we are currently considered a “non-contracted provider” by many private payers because we have not entered into a specific contract to provide diagnostic assays to their insured patients at specified rates of reimbursement. Additionally, a significant amount of our non-Medicare business (private payers) has historically not been contracted, and reimbursement for this business has historically not been at “in network” rates and has therefore been inconsistent. We first began to contract private payer networks in 2015, and since then our number of accessions treated as “in network” has increased as we continue to execute additional contracts, and reimbursement is improving. We are currently contracted with nine preferred provider organization networks, three large health plans, and five regional independent physician associations, and expect to continue to gain contracts in order to be considered as an “in-network” provider with additional plans. If we were to become a contracted provider with additional payers in the future, the amount of overall reimbursement we receive would likely decrease because we could be reimbursed less money per assay performed at a contracted rate than at a non-contracted rate, which could have a negative impact on our revenues. Further, we typically are unable to collect payments from patients beyond that which is paid by their insurance and will continue to experience lost revenue as a result.

Because of certain Medicare billing policies, we may not receive complete reimbursement for assays provided to Medicare patients. Medicare reimbursement revenues are an important component of our business model, and private payers

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sometimes look to Medicare determinations when making their own payment determinations; therefore, incomplete or inadequate reimbursement from Medicare would negatively affect our business.

Medicare has coverage policies that can be national or regional in scope. Coverage means that assay is approved as a benefit for Medicare beneficiaries. If there is no coverage, neither the supplier nor any other party, such as a reference laboratory, may receive reimbursement from Medicare for the service. There is currently no national coverage policy regarding the CTC enumeration portion of our assays. Because our laboratory is in California, the regional Medicare Administrative Contractor, or MAC, for California is the relevant MAC for all our assays. The previous MAC for California, Palmetto, which is contracted with CMS to administer the Molecular Diagnostic Services, or MolDx, program that sets guidelines for coding, coverage and reimbursement of molecular diagnostic assays, adopted a negative coverage policy for CTC enumeration. The current MAC for California, Noridian Healthcare Solutions, LLC, is adopting the coverage policies from Palmetto. Therefore, the enumeration portion of our assays is not currently covered, and we will receive no payment from Medicare for this portion of the service unless and until the coverage policy is changed. Although approximately 76% and 78% of all billable cases received during the years ended December 31, 2018 and 2019, respectively, relate to our Target-Selector™ biomarker assays, we continue to receive orders for traditional enumeration testing, which counts disease burden, and therefore the enumeration testing receives no payment from Medicare based upon the existing coverage decision. The CTC enumeration counts disease burden and is a prognostic assay, and although valuable, it does not meet many of the medical necessity requirements of Medicare and the payers. We intend to pursue payment for the capture portion of our CTC technology that allows us to run our diagnostic testing for some of our Target-Selector™ assays.

We cannot assure you that, even if our current assays and our planned future assays are otherwise successful, reimbursement for the currently Medicare, Blue Cross Blue Shield, and United Healthcare-covered portions of our current assays and our planned future assays would, without such contracted payer reimbursement for the capture/enumeration portion, produce sufficient revenues to enable us to reach profitability and achieve our other commercial objectives.

The processing of Medicare claims is subject to change at CMS’ discretion at any time. Cost containment initiatives may be a threat to Medicare reimbursement levels (including for the covered components of our current assays and our planned future assays, including FISH analysis and molecular assays) for the foreseeable future.

Long payment cycles of Medicare, Medicaid and/or other third-party payers, or other payment delays, could hurt our cash flows and increase our need for working capital.

Medicare and Medicaid have complex billing and documentation requirements that we must satisfy in order to receive payment, and the programs can be expected to carefully audit and monitor our compliance with these requirements. We must also comply with numerous other laws applicable to billing and payment for healthcare services, including, for example, privacy laws. Failure to comply with these requirements may result in, among other things, non-payment, refunds, exclusion from government healthcare programs, and civil or criminal liabilities, any of which may have a material adverse effect on our revenues and earnings. In addition, failure by third-party payers to properly process our payment claims in a timely manner could delay our receipt of payment for our products and services, which may have a material adverse effect on our cash flows.

Complying with numerous regulations pertaining to our business is an expensive and time-consuming process, and any failure to comply could result in substantial penalties.

We are subject to CLIA, a federal law regulating clinical laboratories that perform testing on specimens derived from humans for the purpose of providing information for the diagnosis, prevention or treatment of disease. Our clinical laboratory must be certified under CLIA in order for us to perform testing on human specimens. CLIA is intended to ensure the quality and reliability of clinical laboratories in the United States by mandating specific standards in the areas of personnel qualifications, administration, and participation in proficiency testing, patient test management, quality control, quality assurance and inspections. We have a current certificate of accreditation under CLIA to perform high complexity testing, and our laboratory is accredited by the College of American Pathologists, or CAP, one of six CLIA-approved accreditation organizations. To renew this certificate, we are subject to survey and inspection every two years. Moreover, CLIA and CAP inspectors may make periodic inspections of our clinical laboratory outside of the renewal process. The failure to comply with CLIA or CAP requirements can result in enforcement actions, including the revocation, suspension, or limitation of our CLIA and/or CAP certificate of accreditation, as well as a directed plan of correction, state on-site monitoring, civil money penalties, civil injunctive suit and/or criminal penalties. We must maintain CLIA compliance and certification to be eligible to bill for assays

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provided to Medicare beneficiaries. If we were to be found out of compliance with CLIA program requirements and subjected to sanctions, our business and reputation could be harmed. Even if it were possible for us to bring our laboratory back into compliance, we could incur significant expenses and potentially lose revenue in doing so.

In addition, our laboratory is located in California and is required by state law to have a California state license; as we expand our geographic focus, we may need to obtain laboratory licenses from additional states. California laws establish standards for operation of our clinical laboratory, including the training and skills required of personnel and quality control. In addition, we hold licenses from the states of Pennsylvania, Maryland and Rhode Island to test specimens from patients in those states or received from ordering physicians in those states. In addition, our clinical reference laboratory is required to be licensed on a product-specific basis by New York as an out of state laboratory and our products, as LDTs, must be approved by the New York State Department of Health before they are offered in New York. As part of this process, the State of New York requires validation of our assays. We currently do not have the necessary New York license, but we are in the process of addressing the requirements for licensure in New York. Other states may have similar requirements or may adopt similar requirements in the future. Finally, we may be subject to regulation in foreign jurisdictions if we seek to expand international distribution of our assays outside the United States.

If we were to lose our CLIA certification or California laboratory license, whether as a result of a revocation, suspension or limitation, we would no longer be able to offer our assays, which would limit our revenues and harm our business. If we were to lose, or fail to obtain, a license in any other state where we are required to hold a license, we would not be able to test specimens from those states. If we were to lose our CAP accreditation, our reputation for quality, as well as our business, financial condition and results of operations, could be significantly and adversely affected.

If the FDA were to begin requiring approval or clearance of our current products or assays and our planned future products or assays, we could incur substantial costs and time delays associated with meeting requirements for pre-market clearance or approval or we could experience decreased demand for, or reimbursement of, our assays.

We provide our assays as LDTs. Historically; the FDA has exercised enforcement discretion with respect to most LDTs and has not required laboratories that offer LDTs to comply with the agency’s requirements for medical devices (e.g., establishment registration, device listing, quality systems regulations, premarket clearance or premarket approval, and post-market controls). In recent years, however, the FDA has stated it intends to end its policy of enforcement discretion and regulate certain LDTs as medical devices. To this end, on October 3, 2014, the FDA issued two draft guidance documents, entitled “Framework for Regulatory Oversight of Laboratory Developed Tests (LDTs)” and “FDA Notification and Medical Device Reporting for Laboratory Developed Tests (LDTs)”, respectively, that set forth a proposed risk-based regulatory framework that would apply varying levels of FDA oversight to LDTs. The FDA has indicated that it does not intend to modify its policy of enforcement discretion until the draft guidance documents are finalized. In January 2017, the FDA announced that final guidance on the oversight of LDTs would allow for further public discussion. On January 13, 2017 the FDA issued a “Discussion Paper on Laboratory Developed Tests (LDTs),” which states that the material in the document does not represent a final version of the LDT draft guidance documents that were published in 2014 or position of the FDA; rather, the document is a method to encourage additional dialogue. The timing of when, if at all, the draft guidance documents will be finalized is unclear, and even then, the new regulatory requirements are proposed to be phased-in consistent with the schedule set forth in the guidance. Nevertheless, the FDA may decide to regulate certain LDTs on a case-by-case basis at any time. LDTs with the same intended use as a cleared or approved companion diagnostic are defined in FDA’s draft guidance as “high-risk LDTs (Class III medical devices)” for which premarket review would be first to occur.

FDA review, if required and successfully accomplished, would be expected to have some advantages. Certain health insurance payers have paid higher amounts over LDT prices for FDA approved or cleared tests, recognizing the additional costs of bringing a test through regulatory review. Some payers also accept FDA approval or clearance as a presumptive evidence of an assay’s analytic validity and clinical validity, which can reduce the barriers to coverage since the payer can focus its review on clinical utility.

The container we provide for collection and transport of blood samples from a health care provider to our clinical laboratory, as well as our BCTs, may be medical devices subject to the FDA regulation but are currently exempt from pre-market review by the FDA. While we believe that we are currently in material compliance with applicable laws and regulations, we cannot assure you that the FDA or other regulatory agencies would agree with our determination, and a determination that we have violated these laws, or a public announcement that we are being investigated for possible violations of these laws, could adversely affect our business, prospects, results of operations or financial condition.

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Some of the materials we use for our current products, assays and services and may use in our planned future products, assays and services are labeled for RUO. In November 2013, the FDA finalized guidance regarding the sale and use of products labeled for research or investigational use only. Among other things, the guidance advises that the FDA continues to be concerned about distribution of research or investigational use only products intended for clinical diagnostic use and that the manufacturer’s objective intent for the product’s intended use will be determined by examining the totality of circumstances, including advertising, instructions for clinical interpretation, presentations that describe clinical use, and specialized technical support, surrounding the distribution of the product in question. The FDA has advised that if evidence demonstrates that a product is inappropriately labeled for research or investigational use only, the device would be misbranded and adulterated within the meaning of the Federal Food, Drug and Cosmetic Act. Some of the materials and reagents obtained by us from suppliers for use in our current products, assays and services and our planned future products, assays and services are currently labeled as research or investigational use only products. If the FDA were to undertake enforcement actions, some of our suppliers might cease selling research or investigational use products to us, and any failure to obtain an acceptable substitute could significantly and adversely affect our business, financial condition and results of operations, including increasing the cost of materials or reagents used in our current products, assays and services or planned future products, assays and services or delaying, limiting or prohibiting the purchase of materials or reagents necessary to sell our current products or planned future products or to perform our current assays or our planned future assays.

Our BCTs and Target Selector kits are marketed for RUO and distributed and sold to end users, some of which will be researchers and institutions while other end users could be labs performing clinical testing that will create their own LDTs. Some end users may assert that our ROU products caused their assays to perform inadequately or give erroneous results. If that was the case, we could potentially incur additional liabilities.

Further, HHS requested that its Advisory Committee on Genetics, Health and Society make recommendations about the oversight of genetic testing. A final report was published in April 2008. If the report’s recommendations for increased oversight of genetic testing were to result in further regulatory burdens, they could negatively affect our business and delay the commercialization of assays in development.

Additionally, on March 16, 2018 CMS issued a final determination decision memo for Next-Generation Sequencing, or NGS, tests for Medicare Beneficiaries with Advanced Cancer (CAG-00450N).  Under this final determination, NGS tests that gain FDA approval or clearance as a companion diagnostic will receive coverage, and the final determination of coverage for NGS tests that are LDTs will be left up to the local MAC. Currently, only 1 of our 15 CLIA validated assays is NGS-based; however, we plan to offer additional NGS assays in the future. To gain coverage for those assays, we will need to apply to Palmetto, which is the MAC that evaluates and recommends payment coverage or denial for molecular testing in our jurisdiction. Historically, Palmetto has offered a path to reimbursement by providing coverage while data is being gathered known as Coverage with Data Development, or CDD. Going forward, the extent to which CDD will be continued, if at all, or to the extent that a process will be available in its place, if any, are unclear.  

The requirement of pre-market review could negatively affect our business until such review is completed and clearance to market or approval is obtained. The FDA could require that we stop selling our products or diagnostic assays pending pre-market clearance or approval. If the FDA allows our products or assays to remain on the market but there is uncertainty about our products or assays, if they are labeled investigational by the FDA or if labeling claims the FDA allows us to make are very limited, orders from laboratory supply distributors and physicians, or reimbursement from third-party payers, may decline. The regulatory approval process may involve, among other things, successfully completing additional clinical trials and making a 510(k) submission or filing a pre-market approval application with the FDA. If the FDA requires pre-market review, our products or assays may not be cleared or approved on a timely basis, if at all. We may also decide voluntarily to pursue FDA pre-market review of our products or assays if we determine that doing so would be appropriate.

If we were required to conduct additional clinical studies or trials before continuing to offer assays that we have developed or may develop as LDTs, those studies or trials could lead to delays or failure to obtain necessary regulatory approval, which could cause significant delays in commercializing any future products and harm our ability to achieve sustained profitability.

If the FDA decides to require that we obtain clearance or approvals to commercialize our current assays or our planned future assays, we may be required to conduct additional pre-market clinical testing before submitting a regulatory notification or application for commercial sales. In addition, as part of our long-term strategy we may plan to seek FDA clearance or approval, so we can sell our assays outside our CLIA laboratory; however, we would need to conduct additional clinical

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validation activities on our assays before we can submit an application for FDA approval or clearance. Clinical trials must be conducted in compliance with FDA regulations or the FDA may take enforcement action or reject the data. The data collected from these clinical trials may ultimately be used to support market clearance or approval for our assays. It may take two years or more to conduct the clinical studies and trials necessary to obtain approval from the FDA to commercially launch our current assays and our planned future assays outside of our clinical laboratory. Even if our clinical trials are completed as planned, we cannot be certain that their results will support our assay claims or that the FDA or foreign authorities will agree with our conclusions regarding our assay results. Success in early clinical trials does not ensure that later clinical trials will be successful, and we cannot be sure that the later trials will replicate the results of prior clinical trials and studies. If we are required to conduct pre-market clinical trials, whether using prospectively acquired samples or archival samples, delays in the commencement or completion of clinical testing could significantly increase our assay development costs and delay commercialization. Many of the factors that may cause or lead to a delay in the commencement or completion of clinical trials may also ultimately lead to delay or denial of regulatory clearance or approval. The commencement of clinical trials may be delayed due to insufficient patient enrollment, which is a function of many factors, including the size of the patient population, the nature of the protocol, the proximity of patients to clinical sites and the eligibility criteria for the clinical trial. Moreover, the clinical trial process may fail to demonstrate that our current assays and our planned future assays are effective for the proposed indicated uses, which could cause us to abandon an assay candidate and may delay development of other assays.

We may find it necessary to engage contract research organizations to perform data collection and analysis and other aspects of our clinical trials, which might increase the cost and complexity of our trials. We may also depend on clinical investigators, medical institutions and contract research organizations to perform the trials properly. If these parties do not successfully carry out their contractual duties or obligations or meet expected deadlines, or if the quality, completeness or accuracy of the clinical data they obtain is compromised due to the failure to adhere to our clinical protocols or for other reasons, our clinical trials may have to be extended, delayed or terminated. Many of these factors would be beyond our control. We may not be able to enter into replacement arrangements without undue delays or considerable expenditures. If there are delays in testing or approvals as a result of the failure to perform by third parties, our research and development costs would increase, and we may not be able to obtain regulatory clearance or approval for our current assays and our planned future assays. In addition, we may not be able to establish or maintain relationships with these parties on favorable terms, if at all. Each of these outcomes would harm our ability to market our assays or to achieve sustained profitability.

We are subject to federal and state healthcare fraud and abuse laws and regulations and could face substantial penalties if we are unable to fully comply with such laws.

We are subject to health care fraud and abuse regulation and enforcement by both the federal government and the states in which we conduct our business. These health care laws and regulations include, for example:

• the federal Anti-Kickback Statute, which prohibits, among other things, persons or entities from soliciting, receiving, offering or providing remuneration, directly or indirectly, overtly or covertly, in cash or in kind, in return for or to induce either the referral of an individual for, or the purchase, lease, order or recommendation of, any good, facility, item or services for which payment may be made under a federal health care program such as the Medicare and Medicaid programs;

• the federal physician self-referral prohibition, commonly known as the Stark Law, which prohibits physicians from referring Medicare or Medicaid patients to providers of “designated health services” with whom the physician or a member of the physician’s immediate family has an ownership interest or compensation arrangement, unless a statutory or regulatory exception applies;

• HIPAA, which established additional federal civil and criminal liability for, among other things, knowingly and willfully executing a scheme to defraud any health care benefit program or making false statements in connection with the delivery of or payment for health care benefits, items or services;

• HIPAA, as amended by HITECH, and its implementing regulations, which imposes certain requirements relating to the privacy, security and transmission of individually identifiable health information;

• federal false claims and civil monetary penalties laws, which, prohibit, among other things, individuals or entities from knowingly presenting, or causing to be presented, false or fraudulent claims for payment to the federal government;

• the federal Physician Payments Sunshine Act requirements under the ACA, which require certain manufacturers of drugs, devices, biologics and medical supplies to report to CMS information related to payments and other transfers of

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value made to or at the request of covered recipients, such as physicians, as defined by such law, and teaching hospitals, and certain physician ownership and investment interests held by physicians and their immediate family members; and

• state law equivalents of each of the above federal laws, such as anti-kickback and false claims laws, which may apply to items or services reimbursed by any third-party payer, including commercial insurers.

Further, the ACA, among other things, amended the intent requirement of the federal Anti-Kickback Statute and certain criminal health care fraud statutes. Where the intent requirement has been lowered, a person or entity no longer needs to have actual knowledge of this statute or specific intent to violate it in order to have committed a violation. In addition, the government may now assert that a claim including items or services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the false claims statutes. Any action brought against us for violation of these laws or regulations, even if we successfully defend against it, could cause us to incur significant legal expenses and divert our management’s attention from the operation of our business. If our operations are found to be in violation of any of these laws and regulations, we may be subject to any applicable penalty associated with the violation, including, among others, significant administrative, civil and criminal penalties, damages and fines, imprisonment, integrity oversight and reporting obligations, and exclusion from participation in government funded healthcare programs such as Medicare, Medicaid programs, including the California Medical Assistance Program (Medi-Cal-the California Medicaid program) or other state or federal health care programs. Additionally, we could be required to refund payments received by us, and we could be required to curtail or cease our operations. Any of the foregoing consequences could seriously harm our business and our financial results.

We are required to comply with laws governing the transmission, security and privacy of health information that require significant compliance costs, and any failure to comply with these laws could result in material criminal and civil penalties.

Under the administrative simplification provisions of HIPAA, HHS has issued regulations which establish uniform standards governing the conduct of certain electronic health care transactions and protecting the privacy and security of protected health information used or disclosed by health care providers and other covered entities.

The privacy regulations regulate the use and disclosure of protected health information by covered entities engaging in certain electronic transactions or “standard transactions.” They also set forth certain rights that an individual has with respect to his or her protected health information maintained by a covered entity, including the right to access or amend certain records containing protected health information or to request restrictions on the use or disclosure of protected health information. The HIPAA security regulations establish administrative, physical and technical standards for maintaining the confidentiality, integrity and availability of protected health information in electronic form. These standards apply to covered entities and also to “business associates” or third parties providing services to covered entities involving the use or disclosure of protected health information. The HIPAA privacy and security regulations establish a uniform federal “floor” and do not supersede state laws that are more stringent or provide individuals with greater rights with respect to the privacy or security of, and access to, their records containing protected health information. As a result, we may be required to comply with both HIPAA privacy regulations and varying state privacy and security laws.

Moreover, HITECH, among other things, established certain health information security breach notification requirements, which were later further modified by the Final Omnibus Rule. In the event of a breach of unsecured protected health information, a covered entity must notify each individual whose protected health information is breached, federal regulators and in some cases, must publicize the breach in local or national media. Breaches affecting 500 individuals or more may be publicized by federal regulators who publicly identify the breaching entity, the circumstances of the breach and the number of individuals affected.

These laws contain significant fines and other penalties for wrongful use or disclosure of protected health information. Given the complexity of HIPAA and HITECH and their overlap with state privacy and security laws, and the fact that these laws are rapidly evolving and are subject to changing and potentially conflicting interpretation, our ability to comply with the HIPAA, HITECH and state privacy requirements is uncertain and the costs of compliance are significant. Adding to the complexity is that our operations are evolving, and the requirements of these laws will apply differently depending on such things as whether or not we bill electronically for our services. The costs of complying with any changes to the HIPAA, HITECH and

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state privacy restrictions may have a negative impact on our operations. Noncompliance could subject us to criminal penalties, civil sanctions and significant monetary penalties as well as reputational damage.

Clinical research is heavily regulated and failure to comply with human subject protection regulations may disrupt our research program leading to significant expense, regulatory enforcement, private lawsuits and reputational damage.

Clinical research is subject to federal, state and, for studies conducted outside of the United States, international regulation. At the federal level, the FDA imposes regulations for the protection of human subjects and requirements such as initial and ongoing institutional review board review; informed consent requirements, adverse event reporting and other protections to minimize the risk and maximize the benefit to research participants. Many states impose human subject protection laws that mirror or in some cases exceed federal requirements. HIPAA also regulates the use and disclosure of protected health information in connection with research activities. Research conducted overseas is subject to a variety of national protections such as mandatory ethics committee review, as well as laws regulating the use, disclosure and cross-border transfer of personal data. For example, if we obtain certain personal information regarding residents in the European Union, we may be subject to the European Union General Data Protection Regulation. The costs of compliance with these laws may be significant and compliance with regulatory requirements may result in delay. Noncompliance may disrupt our research and result in data that is unacceptable to regulatory authorities, data lock or other sanctions that may significantly disrupt our operations.

Violation of a state’s prohibition on the corporate practice of medicine could result in a material adverse effect on our business.

A number of states, including California, do not allow business corporations to employ physicians to provide professional services. This prohibition against the “corporate practice of medicine” is aimed at preventing corporations such as us from exercising control over the medical judgments or decisions of physicians. The state licensure statutes and regulations and agency and court decisions that enumerate the specific corporate practice rules vary considerably from state to state and are enforced by both the courts and regulatory authorities, each with broad discretion. If regulatory authorities or other parties in any jurisdiction successfully assert that we are engaged in the unauthorized corporate practice of medicine, we could be required to restructure our contractual and other arrangements. In addition, violation of these laws may result in significant civil, criminal and administrative penalties imposed against us and/or the professional through licensure proceedings, and exclusion from state and federal health care programs.

Legal, political and economic uncertainty surrounding the exit of the U.K., from the European Union, or EU, may be a source of instability in international markets, create significant currency fluctuations, adversely affect our operations or intended operations in the U.K. and pose additional risks to our business, revenue, financial condition and results of operations.

Following the result of a referendum in 2016, the U.K. left the EU on January 31, 2020, commonly referred to as Brexit. Pursuant to the formal withdrawal arrangements agreed between the U.K. and the EU, the U.K. will be subject to a transition period until December 31, 2020, or the Transition Period, during which EU rules will continue to apply. Negotiations between the U.K. and the EU are expected to continue in relation to the customs and trading relationship between the U.K. and the EU following the expiry of the Transition Period.

The uncertainty concerning the U.K’s legal, political and economic relationship with the EU after the Transition Period may be a source of instability in the international markets, create significant currency fluctuations, and/or otherwise adversely affect trading agreements or similar cross-border co-operation arrangements (whether economic, tax, fiscal, legal, regulatory or otherwise).

These developments, or the perception that any of them could occur, have had, and may continue to have, a significant adverse effect on global economic conditions and the stability of global financial markets, and could significantly reduce global market liquidity and limit the ability of key market participants to operate in certain financial markets. In particular, it could also lead to a period of considerable uncertainty in relation to the U.K. financial and banking markets, as well as on the regulatory process in Europe. Asset valuations, currency exchange rates and credit ratings may also be subject to increased market volatility.

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If the U.K. and the EU are unable to negotiate acceptable trading and customs terms or if other EU Member States pursue withdrawal, barrier-free access between the U.K. and other EU Member States or among the European Economic Area overall could be diminished or eliminated. The long-term effects of Brexit will depend on any agreements (or lack thereof) between the U.K. and the EU and, in particular, any arrangements for the U.K. to retain access to EU markets after the Transition Period.

Such a withdrawal from the EU is unprecedented, and it is unclear how the U.K’s access to the European single market for goods, capital, services and labor within the EU, or single market, and the wider commercial, legal and regulatory environment, will impact our business. Any current or planned future operations in the U.K. as well as in other countries in the EU and European Economic Area, or EEA, could be disrupted by Brexit, particularly if there is a change in the U.K’s relationship to the single market.

We may also face new regulatory costs and challenges as a result of Brexit that could have an adverse effect on our operations. For example, the U.K. could lose the benefits of global trade agreements negotiated by the EU on behalf of its members, which may result in increased trade barriers that could make our doing business in the EU and the EEA more difficult. Furthermore, at present, there are no indications of the effect Brexit will have on the pathway to obtaining marketing approval for any of our product candidates in the U.K., or what, if any, role the EMA may have in the approval process. There may continue to be economic uncertainty surrounding the consequences of Brexit which could adversely impact customer confidence resulting in customers reducing their spending budgets on our solutions, which could adversely affect our business, revenue, financial condition, results of operations.

Intellectual Property Risks Related to Our Business

If we are unable to obtain and maintain effective patent rights for our products or services, we may not be able to compete effectively in our markets.

We rely upon a combination of patents, trade secret protection, and confidentiality agreements to protect the intellectual property related to our technologies, products and services. Our success depends in large part on our ability to obtain and maintain patent and other intellectual property protection in the United States and in other countries with respect to our proprietary technology and products.

We have sought to protect our proprietary position by filing patent applications in the United States and abroad related to our novel technologies and products that are important to our business. This process is expensive and time consuming, and we may not be able to file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. The possibility exists that we will fail to identify patentable aspects of our research and development output before it is too late to obtain patent protection.

The patent position of diagnostic companies generally is highly uncertain and involves complex legal and factual questions for which legal principles remain unsolved. The patent applications that we own, or in-license, may fail to result in issued patents with claims that cover our products or services in the United States or in other foreign countries. There is no assurance that all potentially relevant prior art relating to our patents and patent applications has been found, which can invalidate a patent or prevent a patent from issuing from a pending patent application. Even if patents do successfully issue, and even if such patents cover our products and services, third parties may challenge their validity, enforceability, or scope, which may result in such patents being narrowed, found unenforceable or invalidated. Furthermore, even if they are unchallenged, our patents and patent applications may not adequately protect our intellectual property, provide exclusivity for our products and services, or prevent others from designing around our claims. Any of these outcomes could impair our ability to prevent competition from third parties, which may have an adverse impact on our business.

We, independently or together with our licensors, have filed several patent applications covering various aspects of our products and services. We cannot offer any assurances about which, if any, patents will issue, the breadth of any such patent or whether any issued patents will be found invalid and unenforceable or will be threatened by third parties. Any successful opposition to these patents or any other patents owned by or licensed to us after patent issuance could deprive us of rights necessary for the successful commercialization of any products and services that we may offer. Further, if we encounter delays in regulatory approvals, the period of time during which we could market a product or service under patent protection could be reduced.

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Patent policy and rule changes could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents.

Changes in either the patent laws or interpretation of the patent laws in the United States and other countries may diminish the value of our patents or narrow the scope of our patent protection. The laws of foreign countries may not protect our rights to the same extent as the laws of the United States. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and other jurisdictions are typically not published until 18 months after filing, or in some cases not at all. We therefore cannot be certain that we or our licensors were the first to make the invention claimed in our owned and licensed patents or pending applications, or that we or our licensor were the first to file for patent protection of such inventions. Assuming the other requirements for patentability are met, in the United States prior to March 15, 2013, the first to make the claimed invention is entitled to the patent, while outside the United States, the first to file a patent application is entitled to the patent. After March 15, 2013, under the Leahy-Smith America Invents Act, or the Leahy-Smith Act, enacted on September 16, 2011, the United States has moved to a first to file system. The Leahy-Smith Act also includes a number of significant changes that affect the way patent applications will be prosecuted and may also affect patent litigation. The effects of these changes are currently unclear as the United States Patent and Trademark Office, or USPTO, must still implement various regulations, the courts have yet to address any of these provisions and the applicability of the act and new regulations on specific patents discussed herein have not been determined and would need to be reviewed. In general, the Leahy-Smith Act and its implementation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could have a material adverse effect on our business and financial condition.

If we are unable to maintain effective proprietary rights for our products or services, we may not be able to compete effectively in our markets.

In addition to the protection afforded by patents, we rely on trade secret protection and confidentiality agreements to protect proprietary know-how that is not patentable or that we elect not to patent, processes for which patents are difficult to enforce and any other elements of our products and services that involve proprietary know-how, information or technology that is not covered by patents. However, trade secrets can be difficult to protect. We seek to protect our proprietary technology and processes, in part, by entering into confidentiality agreements with our employees, consultants, scientific advisors, and contractors. We also seek to preserve the integrity and confidentiality of our data and trade secrets by maintaining physical security of our premises and physical and electronic security of our information technology systems. While we have confidence in these individuals, organizations and systems, agreements or security measures may be breached, and we may not have adequate remedies for any breach. In addition, our trade secrets may otherwise become known or be independently discovered by competitors.

Although we expect all of our employees and consultants to assign their inventions to us, and all of our employees, consultants, advisors, and any third parties who have access to our proprietary know-how, information, or technology to enter into confidentiality agreements, we cannot provide any assurances that all such agreements have been duly executed or that our trade secrets and other confidential proprietary information will not be disclosed or that competitors will not otherwise gain access to our trade secrets or independently develop substantially equivalent information and techniques. Misappropriation or unauthorized disclosure of our trade secrets could impair our competitive position and may have a material adverse effect on our business. Additionally, if the steps taken to maintain our trade secrets are deemed inadequate, we may have insufficient recourse against third parties for misappropriating the trade secret.

Third-party claims of intellectual property infringement may prevent or delay our development and commercialization efforts.

Our commercial success depends in part on our avoiding infringement of the patents and proprietary rights of third parties. There have been many lawsuits and other proceedings involving patent and other intellectual property rights in the biotechnology and pharmaceutical industries, including patent infringement lawsuits, interferences, oppositions, and reexamination proceedings before the USPTO and corresponding foreign patent offices. Numerous U.S. and foreign issued patents and pending patent applications, which are owned by third parties, exist in the fields in which we are developing products and services. As the biotechnology and pharmaceutical industries expand and more patents are issued, the risk increases that our products and services may be subject to claims of infringement of the patent rights of third parties.

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Third parties may assert that we are employing their proprietary technology without authorization. There may be third-party patents or patent applications with claims to materials, formulations, methods of manufacture, or methods for treatment related to the use or manufacture of our products and services. We have conducted freedom to operate analyses with respect to only certain of our products and services, and therefore we do not know whether there are any third-party patents that would impair our ability to commercialize these products and services. We also cannot guarantee that any of our analyses are complete and thorough, nor can we be sure that we have identified each and every patent and pending application in the United States and abroad that is relevant or necessary to the commercialization of our products and services. Because patent applications can take many years to issue, there may be currently pending patent applications that may later result in issued patents that our products or services may infringe.

For example, in August 2016, we received a letter from MolecularMD Corp. offering a license to two U.S. Patents owned by the Memorial Sloan-Kettering Cancer Center, and licensed to MolecularMD Corp., that are relevant to one of the biomarkers we detect in our Liquid Biopsy Non-Small Cell Lung Cancer Profile Target-Selector™ assay and our Liquid Biopsy Lung Cancer Resistance Profile Target-Selector™ assay. One of the two patents is expected to expire in 2026. The other patent is expected to expire in 2028. Although we believe that the claims of both patents relevant to our assays would likely be held invalid, we cannot provide any assurances that a court or an administrative agency would agree with our assessment. If the validity of the relevant claims in question is upheld upon a validity challenge, then we may be liable for past damages and would need a license in order to continue commercializing our Liquid Biopsy Non-Small Cell Lung Cancer Profile Target-Selector™ Assay and our Liquid Biopsy Lung Cancer Resistance Profile Target-Selector™ Assay in the United States. However, such a license may not be available on commercially reasonable terms or at all, which could materially and adversely affect our business.

In addition, we are aware of a U.S. Patent owned by Amgen, Inc. that is relevant to one of the biomarkers we detect in our Liquid Biopsy Non-Small Cell Lung Cancer Profile Target-Selector™ assay and our Liquid Biopsy Lung Cancer Resistance Profile Target-Selector™ assay. The patent is expected to expire in 2028. Although we believe that the claims of the patent relevant to our assays would likely be held invalid, we cannot provide any assurances that a court or an administrative agency would agree with our assessment. If the validity of the relevant claims in question is upheld upon a validity challenge, then we may be liable for past damages and would need a license in order to continue commercializing our Liquid Biopsy Non-Small Cell Lung Cancer Profile Target-Selector™ assay and our Liquid Biopsy Lung Cancer Resistance Profile Target-Selector™ assay in the United States. However, such a license may not be available on commercially reasonable terms or at all, which could materially and adversely affect our business.

We are also aware of a U.S. Patent owned by Genentech, Inc. that is relevant to one of the biomarkers we detect in our Liquid Biopsy Lung Cancer Resistance Profile Target-Selector™ assay and our Liquid Biopsy Colon Cancer Profile Target-Selector™ assay. The patent is expected to expire in 2025. Although we believe that the claims of the patent relevant to our assays would likely be held invalid, we cannot provide any assurances that a court or an administrative agency would agree with our assessment. If the validity of the relevant claims in question is upheld upon a validity challenge, then we may be liable for past damages and would need a license in order to continue commercializing our Liquid Biopsy Lung Cancer Resistance Profile Target-Selector™ assay and our Liquid Biopsy Colon Cancer Profile Target-Selector™ assay in the United States. However, such a license may not be available on commercially reasonable terms or at all, which could materially and adversely affect our business.

In addition, in July 2016, we received a communication from the Mayo Foundation for Medical Education and Research (“Mayo”) offering a license to a U.S. Patent owned by Mayo that is relevant to an antibody that we use in our Liquid Biopsy Immuno-Oncology PD-L1 assay. The patent is expected to expire in 2021. At present, we believe that we will need a license to this patent to continue commercializing our Liquid Biopsy Immuno-Oncology PD-L1 assay. We are currently in discussions with Mayo and believe a license can be obtained on commercially reasonable terms. However, if we are unable to secure such a license, we may be liable for past damages, and our business could be materially and adversely affected.

In addition, third parties may obtain patents in the future and claim that use of our technologies infringes upon these patents. If any third-party patents were held by a court of competent jurisdiction to cover aspects of our products or services, the holders of any such patents may be able to block our ability to commercialize such products or services unless we obtained a license under the applicable patents, or until such patents expire or are finally determined to be invalid or unenforceable. Such a license may not be available on commercially reasonable terms or at all.

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Parties making claims against us may obtain injunctive or other equitable relief, which could effectively block our ability to further develop and commercialize one or more of our products or services. Defense of these claims, regardless of their merit, would involve substantial litigation expense and would be a substantial diversion of employee resources from our business. In the event of a successful claim of infringement against us, we may have to pay substantial damages, including treble damages and attorneys’ fees for willful infringement, pay royalties, redesign our infringing products or obtain one or more licenses from third parties, which may be impossible or require substantial time and monetary expenditure.

We may not be successful in obtaining or maintaining necessary rights to our products or services through acquisitions and in-licenses.

We currently have rights to the intellectual property, through licenses from third parties and under patents that we own, to develop our products and services. Because our programs may require the use of proprietary rights held by third parties, the growth of our business will likely depend in part on our ability to acquire, in-license, or use these proprietary rights. We may be unable to acquire or in-license any compositions, methods of use, processes, or other third-party intellectual property rights from third parties that we identify as necessary for our products or services. The licensing and acquisition of third-party intellectual property rights is a competitive area, and a number of more established companies are also pursuing strategies to license or acquire third-party intellectual property rights that we may consider attractive. These established companies may have a competitive advantage over us due to their size, cash resources, and greater clinical development and commercialization capabilities. In addition, companies that perceive us to be a competitor may be unwilling to assign or license rights to us. We also may be unable to license or acquire third-party intellectual property rights on terms that would allow us to make an appropriate return on our investment.

We sometimes collaborate with U.S. and foreign institutions to accelerate our research or development under written agreements with these institutions. Typically, these institutions provide us with an option to negotiate a license to any of the institution’s rights in technology resulting from the collaboration. Regardless of such option, we may be unable to negotiate a license within the specified timeframe or under terms that are acceptable to us. If we are unable to do so, the institution may offer the intellectual property rights to other parties, potentially blocking our ability to pursue our program.

If we are unable to successfully obtain rights to required third-party intellectual property rights or maintain the existing intellectual property rights we have, we may have to abandon development of that program and our business and financial condition could suffer.

Although we are not currently involved in any litigation, we may be involved in lawsuits to protect or enforce our patents or the patents of our licensors, which could be expensive, time consuming, and unsuccessful.

Competitors may infringe our patents or the patents of our licensors. Although we are not currently involved in any litigation, if we or one of our licensing partners were to initiate legal proceedings against a third-party to enforce a patent covering one of our products or services, the defendant could counterclaim that the patent covering our product or service is invalid and/or unenforceable. In patent litigation in the United States, defendant counterclaims alleging invalidity and/or unenforceability are commonplace. Grounds for a validity challenge could be an alleged failure to meet any of several statutory requirements, including lack of novelty, obviousness, or non-enablement. Grounds for an unenforceability assertion could be an allegation that someone connected with prosecution of the patent withheld relevant information from the USPTO, or made a misleading statement, during prosecution. The outcome following legal assertions of invalidity and unenforceability is unpredictable.

Interference proceedings provoked by third parties or brought by us or declared by the USPTO may be necessary to determine the priority of inventions with respect to our patents or patent applications or those of our licensors. An unfavorable outcome could require us to cease using the related technology or to attempt to license rights to it from the prevailing party. Our business could be harmed if the prevailing party does not offer us a license on commercially reasonable terms. Our defense of litigation or interference proceedings may fail and, even if successful, may result in substantial costs and distract our management and other employees. In addition, the uncertainties associated with litigation could have a material adverse effect on our ability to raise sufficient capital to continue our research programs, license necessary technology from third parties, or enter into development partnerships that would help commercialize our products or services.

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Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation. There could also be public announcements of the results of hearings, motions, or other interim proceedings or developments. If securities analysts or investors perceive these results to be negative, it could have a material adverse effect on the price of our common stock.

We may be subject to claims that our employees, consultants, or independent contractors have wrongfully used or disclosed confidential information of third parties or that our employees have wrongfully used or disclosed alleged trade secrets of their former employers.

We employ certain individuals who were previously employed at universities or other biotechnology or pharmaceutical companies, including our competitors or potential competitors. Although we try to ensure that our employees, consultants, and independent contractors do not use the proprietary information or know-how of others in their work for us, and we are not currently subject to any claims that our employees, consultants, or independent contractors have wrongfully used or disclosed confidential information of third parties, we may in the future be subject to such claims. Litigation may be necessary to defend against these claims. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel, which could adversely impact our business. Even if we are successful in defending against such claims, litigation could result in substantial costs and be a distraction to management and other employees.

We may be subject to claims challenging the inventorship of our patents and other intellectual property.

Although we are not currently experiencing any claims challenging the inventorship of our patents or ownership of our intellectual property, we may in the future be subject to claims that former employees, collaborators or other third parties have an interest in our patents or other intellectual property as an inventor or co-inventor. For example, we may have inventorship disputes arise from conflicting obligations of consultants or others who are involved in developing our products or services. Litigation may be necessary to defend against these and other claims challenging inventorship. If we fail in defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights, such as exclusive ownership of, or right to use, valuable intellectual property. Such an outcome could have a material adverse effect on our business. Even if we are successful in defending against such claims, litigation could result in substantial costs and be a distraction to management and other employees.

Changes in U.S. patent law could diminish the value of patents in general, thereby impairing our ability to protect our products.

As is the case with other biopharmaceutical companies, our success is heavily dependent on intellectual property, particularly patents. Obtaining and enforcing patents in the biotechnology industry involves both technological and legal complexity. Therefore, obtaining and enforcing biotechnology patents is costly, time consuming, and inherently uncertain. In addition, the United States has recently enacted and is currently implementing wide-ranging patent reform legislation. Recent U.S. Supreme Court rulings have narrowed the scope of patent protection available in certain circumstances and weakened the rights of patent owners in certain situations. In addition to increasing uncertainty with regard to our ability to obtain patents in the future, this combination of events has created uncertainty with respect to the value of patents, once obtained. Depending on future actions by the U.S. Congress, the federal courts, and the USPTO, the laws and regulations governing patents could change in unpredictable ways that would weaken our ability to obtain new patents or to enforce our existing patents and patents that we might obtain in the future.

We may not be able to protect our intellectual property rights throughout the world.

Filing, prosecuting, and defending patents on products and services in all countries throughout the world would be prohibitively expensive, and our intellectual property rights in some countries outside the United States can be less extensive than those in the United States. In addition, the laws of some foreign countries do not protect intellectual property rights to the same extent as federal and state laws in the United States. Consequently, we may not be able to prevent third parties from practicing our inventions in all countries outside the United States, or from selling or importing products made using our inventions in and into the United States or other jurisdictions. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to develop their own products and may also export infringing products to territories

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where we have patent protection, but enforcement is not as strong as that in the United States. These products may compete with our products and our patents or other intellectual property rights may not be effective or sufficient to prevent them from competing.

Many companies have encountered significant problems in protecting and defending intellectual property rights in foreign jurisdictions. The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement of patents, trade secrets, and other intellectual property protection, particularly those relating to biotechnology products, which could make it difficult for us to stop the infringement of our patents or marketing of competing products in violation of our proprietary rights generally. Proceedings to enforce our patent rights in foreign jurisdictions, whether or not successful, could result in substantial costs and divert our efforts and attention from other aspects of our business, could put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not issuing and could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate, and the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce our intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property that we develop or license.

Our collaborators may assert ownership or commercial rights to inventions we develop from our use of the biological materials which they provide to us, or otherwise arising from the collaboration.

We collaborate with several institutions, physicians and researchers in scientific matters. We do not have written agreements with certain of such collaborators, or the written agreements we have do not cover intellectual property rights. Also, we rely on numerous third parties to provide us with blood samples and biological materials that we use to develop assays. If we cannot successfully negotiate sufficient ownership and commercial rights to any inventions that result from our use of a third-party collaborator’s materials, or if disputes arise with respect to the intellectual property developed with the use of a collaborator’s samples, or data developed in a collaborator’s study, we may be limited in our ability to capitalize on the market potential of these inventions or developments.

Risks Relating to Our Common Stock

The price of our common stock may be volatile.

Before our initial public offering, there was no public market for our common stock. Market prices for securities of early-stage life sciences companies have historically been particularly volatile. The factors that may cause the market price of our common stock to fluctuate include, but are not limited to:

• progress, or lack of progress, in performing, developing and commercializing our current assays and our planned future assays;

• favorable or unfavorable decisions about our assays from government regulators, insurance companies or other third-party payers;

• our ability to recruit and retain qualified research and development personnel;

• changes in investors’ and securities analysts’ perception of the business risks and conditions of our business;

• changes in our relationship with key collaborators;

• changes in the market valuation or earnings of our competitors or companies viewed as similar to us;

• changes in key personnel;

• depth of the trading market in our common stock;

• changes in our capital structure, such as future issuances of securities or the incurrence of additional debt;

• the granting or exercise of employee stock options or other equity awards;

• realization of any of the risks described herein; and

• general market and economic conditions.

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In addition, the equity markets have experienced significant price and volume fluctuations that have affected the market prices for the securities of newly public companies for a number of reasons, including reasons that may be unrelated to our business or operating performance. These broad market fluctuations may result in a material decline in the market price of our common stock and you may not be able to sell your shares at prices you deem acceptable. In the past, following periods of volatility in the equity markets, securities class action lawsuits have been instituted against public companies. Such litigation, if instituted against us, could result in substantial cost and the diversion of management attention.

Our failure to meet the continued listing requirements of The Nasdaq Capital Market could result in a de-listing of our common stock.

If we fail to satisfy the continued listing requirements of The Nasdaq Capital Market, such as the corporate governance requirements, the minimum closing bid price requirement, or the minimum stockholders’ equity requirement, Nasdaq may take steps to de-list our common stock. For example, in May 2016, we received a letter from Nasdaq indicating that we are not in compliance with the minimum stockholders’ equity requirement of Nasdaq Listing Rule 5550(b)(1), and in each of June 2016, November 2016, January 2018 and September 2019, we received letters from Nasdaq indicating that we are not in compliance with the minimum bid price requirement of Nasdaq Listing Rule 5550(a)(2), which requires that companies listed on The Nasdaq Capital Market maintain a minimum closing bid price of at least $1.00 per share. Although we were able to regain compliance with the Nasdaq continued listing requirements discussed in the May 2016, June 2016, November 2016 and January 2018 letter, we have not yet regained compliance with the $1.00 minimum closing bid price requirement that was the subject of the September 2019 letter from Nasdaq. In March 2020, we requested and received an additional 180-day extension to regain compliance with the $1.00 minimum closing bid price requirement that was the subject of the September 2019 letter from Nasdaq. We intend to monitor the closing bid price of our common stock and may, if appropriate, consider implementing available options, including a reverse stock split, to regain compliance with the minimum closing bid price requirement. We currently plan to seek stockholder approval of a reverse stock split at our 2020 annual meeting of stockholders. There can be no assurance that we will be able to regain compliance with the $1.00 minimum closing bid price requirement or maintain compliance with the other continued listing requirements of the Nasdaq Capital Market. If we fail to regain and/or maintain compliance with Nasdaq’s continued listing requirements, Nasdaq may take steps to de-list our common stock. Such a de-listing would likely have a negative effect on the price of our common stock and would impair your ability to sell or purchase our common stock when you wish to do so. In the event of a de-listing, we would take actions to restore our compliance with Nasdaq’s listing requirements, but we can provide no assurance that any such action taken by us would allow our common stock to become listed again, stabilize the market price or improve the liquidity of our common stock, or prevent future non-compliance with Nasdaq’s listing requirements.

Our quarterly operating results may fluctuate significantly.

We expect our operating results to be subject to quarterly fluctuations. Our net loss and other operating results will be affected by numerous factors, including:

• the rate of adoption and/or continued use of our current assays and our planned future assays by healthcare practitioners;

• variations in the level of expenses related to our development programs;

• addition or reduction of resources for sales and marketing;

• addition or termination of clinical utility studies;

• any intellectual property infringement lawsuit in which we may become involved;

• third-party payer coverage and reimbursement determinations affecting our assays; and

• regulatory developments affecting our assays.

If our quarterly operating results fall below the expectations of investors or securities analysts, the price of our common stock could decline substantially. Furthermore, any quarterly fluctuations in our operating results may, in turn, cause the price of our stock to fluctuate substantially.

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If securities or industry analysts issue an adverse opinion regarding our stock or do not publish research or reports about our company, our stock price and trading volume could decline.

The trading market for our common stock will depend in part on the research and reports that equity research analysts publish about us, our business and our competitors. We do not control these analysts or the content and opinions or financial models included in their reports. Securities analysts may elect not to provide research coverage of our company, and such lack of research coverage may adversely affect the market price of our common stock. The price of our common stock could also decline if one or more equity research analysts downgrade our common stock or if those analysts issue other unfavorable commentary or cease publishing reports about us or our business. If one or more equity research analysts cease coverage of our company, we could lose visibility in the market, which in turn could cause our stock price to decline.

Future sales of our common stock or other securities, or the perception that future sales may occur, may cause the market price of our common stock to decline, even if our business is doing well.

Sales of substantial amounts of our common stock or other securities, or the perception that these sales may occur, could materially and adversely affect the price of our common stock and could impair our ability to raise capital through the sale of additional equity securities. For example, in May 2018, the SEC declared effective a shelf registration statement filed by us. This shelf registration statement allows us to issue any combination of our common stock, preferred stock, debt securities and warrants from time to time for an aggregate initial offering price of up to $50 million, subject to certain limitations for so long as our public float is less than $75 million. The specific terms of additional future offerings, if any, under this shelf registration statement would be established at the time of such offerings. Depending on a variety of factors, including market liquidity of our common stock, the sale of shares under this shelf registration statement may cause the trading price of our common stock to decline. The sale of a substantial number of shares of our common stock under this shelf registration statement, or anticipation of such sales, could cause the trading price of our common stock to decline or make it more difficult for us to sell equity or equity-related securities in the future at a time and at a price that we might otherwise desire.

We had outstanding 108,707,392 shares of common stock as of March 20, 2020, of which no more than 31,415 are restricted securities that may be sold only in accordance with the resale restrictions under Rule 144 of the Securities Act. In addition, as of March 20, 2020, we had outstanding preferred stock convertible into 471,493 shares of our common stock, options to purchase 2,510,989 shares of our common stock, 360 shares of common stock were issuable upon the settlement of outstanding restricted stock units, or RSUs, and 15,296,249 shares of our common stock were issuable upon the exercise of outstanding warrants. Shares issued upon the exercise of stock options or upon the settlement of outstanding RSUs generally will be eligible for sale in the public market, except that affiliates will continue to be subject to volume limitations and other requirements of Rule 144 under the Securities Act. The issuance or sale of such shares could depress the market price of our common stock.

In the future, we also may issue our securities if we need to raise additional capital. The number of new shares of our common stock issued in connection with raising additional capital could constitute a material portion of the then-outstanding shares of our common stock.

If we are unable to favorably assess the effectiveness of our internal control over financial reporting, investors may lose confidence in our financial reporting and our stock price could be materially adversely affected.

Effective internal controls over financial reporting are necessary for us to provide reliable financial reports and, together with adequate disclosure controls and procedures, are designed to prevent fraud. Any failure to implement required new or improved controls, or difficulties encountered in their implementation could cause us to fail to meet our reporting obligations. In addition, any testing by us conducted in connection with Section 404(a) of the Sarbanes-Oxley Act, or the subsequent testing by our independent registered public accounting firm conducted in connection with Section 404(b) of the Sarbanes-Oxley Act after we no longer qualify as a “smaller reporting company,” with less than $100 million in annual revenues, may reveal deficiencies in our internal controls over financial reporting that are deemed to be material weaknesses or that may require prospective or retroactive changes to our consolidated financial statements or identify other areas for further attention or improvement. Inferior internal controls could also cause investors to lose confidence in our reported financial information, which could have a negative effect on the trading price of our common stock.

We are required to disclose changes made in our internal control procedures on a quarterly basis and our management is required to assess the effectiveness of these controls annually. However, for as long as we are a “smaller reporting company” with less than $100 million in annual revenues, our independent registered public accounting firm will not be required to

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attest to the effectiveness of our internal control over financial reporting pursuant to Section 404. An independent assessment of the effectiveness of our internal controls could detect problems that our management’s assessment might not. Undetected material weaknesses in our internal controls could lead to financial statement restatements and require us to incur the expense of remediation.

We have incurred and will continue to incur significant costs as a result of operating as a public company, and our management will be required to devote substantial time to new compliance initiatives.

As a public company, we are subject to the reporting requirements of the Securities Exchange Act of 1934, as amended, the Dodd-Frank Wall Street Reform and Consumer Protection Act, or the Dodd-Frank Act, the listing requirements of The Nasdaq Stock Market and other applicable securities rules and regulations. Compliance with these rules and regulations includes significant legal and financial compliance costs, makes some activities more difficult, time-consuming or costly, and increases demand on our systems and resources. The Sarbanes-Oxley Act requires, among other things, that we maintain effective disclosure controls and procedures and internal control over financial reporting. In order to maintain and, if required, improve our disclosure controls and procedures and internal control over financial reporting to meet this standard, significant resources and management oversight may be required. As a result, management’s attention may be diverted from other business concerns, which could harm our business and operating results. Stockholder activism, the current political environment and the current high level of government intervention and regulatory reform may lead to substantial new regulations and disclosure obligations, which may lead to additional compliance costs and impact the manner in which we operate our business in ways we cannot currently anticipate.

In addition, changing laws, regulations and standards relating to corporate governance and public disclosure are creating uncertainty for public companies, increasing legal and financial compliance costs and making some activities more time consuming. These laws, regulations and standards are subject to varying interpretations, in many cases due to their lack of specificity, and, as a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies. This could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices. We intend to invest resources to comply with evolving laws, regulations and standards, and this investment may result in increased general and administrative expenses and a diversion of management’s time and attention from revenue-generating activities to compliance activities. If our efforts to comply with new laws, regulations and standards differ from the activities intended by regulatory or governing bodies due to ambiguities related to practice, regulatory authorities may initiate legal proceedings against us and our business may be harmed.

Anti-takeover provisions of our certificate of incorporation, our bylaws and Delaware law could make an acquisition of us, which may be beneficial to our stockholders, more difficult and may prevent attempts by our stockholders to replace or remove the current members of our board and management.

Certain provisions of our amended certificate of incorporation and amended and restated bylaws could discourage, delay or prevent a merger, acquisition or other change of control that stockholders may consider favorable, including transactions in which you might otherwise receive a premium for your shares. Furthermore, these provisions could prevent or frustrate attempts by our stockholders to replace or remove members of our Board of Directors. (For example, Delaware law provides that if a corporation has a classified board of directors, stockholders cannot remove any director during his or her term without cause.) These provisions also could limit the price that investors might be willing to pay in the future for our common stock, thereby depressing the market price of our common stock. Stockholders who wish to participate in these transactions may not have the opportunity to do so. These provisions, among other things:

• classify our Board of Directors into three classes of equal (or roughly equal) size, with all directors serving for a three-year term and the directors of only one class being elected at each annual meeting of stockholders, so that the terms of the classes of directors are “staggered”;

• allow the authorized number of directors to be changed only by resolution of our Board of Directors;

• authorize our Board of Directors to issue, without stockholder approval, preferred stock, the rights of which will be determined at the discretion of the Board of Directors and that, if issued, could operate as a “poison pill” to dilute the stock ownership of a potential hostile acquirer to prevent an acquisition that our Board of Directors does not approve;

• establish advance notice requirements for stockholder nominations to our Board of Directors or for stockholder proposals that can be acted on at stockholder meetings; and

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• limit who may call a stockholders meeting.

In addition, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, or DGCL, which may, unless certain criteria are met, prohibit large stockholders, in particular those owning 15% or more of the voting rights on our common stock, from merging or combining with us for a prescribed period of time.

Because we do not expect to pay cash dividends for the foreseeable future, you must rely on appreciation of our common stock price for any return on your investment. Even if we change that policy, we may be restricted from paying dividends on our common stock.

We do not intend to pay cash dividends on shares of our common stock for the foreseeable future. Any determination to pay dividends in the future will be at the discretion of our Board of Directors and will depend upon results of operations, financial performance, contractual restrictions, restrictions imposed by applicable law and other factors our Board of Directors deems relevant. Accordingly, you will have to rely on capital appreciation, if any, to earn a return on your investment in our common stock. Investors seeking cash dividends in the foreseeable future should not purchase our common stock.

Changes in tax laws or regulations that are applied adversely to us or our customers may have a material adverse effect on our business, cash flow, financial condition or results of operations.

New income, sales, use or other tax laws, statutes, rules, regulations or ordinances could be enacted at any time, which could adversely affect our business operations and financial performance. Further, existing tax laws, statutes, rules, regulations or ordinances could be interpreted, changed, modified or applied adversely to us. For example, the Tax Cuts and Jobs Act of 2017, or the Tax Act, enacted many significant changes to the U.S. tax laws. Future guidance from the Internal Revenue Service and other tax authorities with respect to the Tax Act may affect us, and certain aspects of the Tax Act could be repealed or modified in future legislation. In addition, it is uncertain if and to what extent various states will conform to the Tax Act or any newly enacted federal tax legislation. Changes in corporate tax rates, the realization of net deferred tax assets relating to our operations, the taxation of foreign earnings, and the deductibility of expenses under the Tax Act or future reform legislation could have a material impact on the value of our deferred tax assets, could result in significant one-time charges, and could increase our future U.S. tax expense.

Our effective tax rate may fluctuate, and we may incur obligations in tax jurisdictions in excess of accrued amounts.

We are subject to taxation in numerous U.S. states and territories. As a result, our effective tax rate is derived from a combination of applicable tax rates in the various places that we operate. In preparing our financial statements, we estimate the amount of tax that will become payable in each of such places. Nevertheless, our effective tax rate may be different than experienced in the past due to numerous factors, including passage of the newly enacted federal income tax law, the results of examinations and audits of our tax filings, our inability to secure or sustain acceptable agreements with tax authorities, changes in accounting for income taxes and changes in tax laws. Any of these factors could cause us to experience an effective tax rate significantly different from previous periods or our current expectations and may result in tax obligations in excess of amounts accrued in our financial statements.

Our ability to use our estimated net operating loss carryforwards and certain other tax attributes may be limited.

Our ability to utilize our estimated federal net operating loss, carryforwards and federal tax credits may be limited under Sections 382 and 383 of the Code. Under the Tax Cuts and Jobs Act of 2017, federal net operating losses incurred in 2018 and in future years may be carried forward indefinitely, but the deductibility of such federal net operating losses is limited. It is uncertain if and to what extent various states will conform to the Tax Cuts and Jobs Act of 2017. In addition, under Sections 382 and 383 of the Code, if a corporation undergoes an “ownership change,” generally defined as a cumulative change in its equity ownership by “5-percent shareholders” of greater than 50 percentage points (by value) over a three-year period, the corporation’s ability to use its estimated pre-change net operating loss carryforwards and certain other tax attributes (such as research tax credits) to offset its post-change taxable income and taxes, as applicable, may be limited. As of December 31, 2019, we had estimated federal and state net operating loss carryforwards of approximately $54.9 million and $13.9 million, respectively, and estimated federal and California research and development tax credits of approximately $366,000 and $3.7 million, respectively, which could be limited if we have experienced or do experience any “ownership changes.” We have not completed a study to assess whether an ownership change has occurred or whether there have been

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multiple ownership changes since our formation, due to the complexity and cost associated with such a study, and the fact that there may be additional ownership changes in the future. We believe, however, that ownership changes likely occurred in each year from 2015 through 2019. In addition, at the state level, there may be periods during which the use of net operating loss carryforwards is suspended or otherwise limited, which could accelerate or permanently increase state taxes owed. We have estimated that the use of our net operating loss is limited and the amounts above remain fully offset by a valuation allowance.

We could be subject to securities class action litigation.

In the past, securities class action litigation has often been brought against a company following a decline in the market price of its securities. This risk is especially relevant for us because early-stage life sciences companies have experienced significant stock price volatility in recent years. If we face such litigation, it could result in substantial costs and a diversion of management’s attention and resources, which could harm our business.

Item 1B.Unresolved Staff Comments.

Not applicable.

Item 2. Properties.

We have a lease for approximately 48,000 square feet of space in San Diego, California for use as a clinical reference laboratory and corporate headquarters, including manufacturing and research laboratories. As of December 31, 2019, the average rent for the remaining lease period is approximately $120,000 per month. This lease expires in July 2020.

Item 3.Legal Proceedings.

In the normal course of business, we may be involved in legal proceedings or threatened legal proceedings. We are not party to any legal proceedings or aware of any threatened legal proceedings which are expected to have a material adverse effect on our financial condition, results of operations or liquidity.

Item 4.Mine Safety Disclosures.

Not applicable.

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PART II

Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information

Our common stock is traded on The Nasdaq Capital Market under the symbol “BIOC.”

Holders of Record

As of March 20, 2020, there were 51 holders of record of our common stock. The actual number of common stockholders is greater than the number of record holders, and includes stockholders who are beneficial owners, but whose shares are held in street name by brokers and other nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

Dividend Policy

We have never declared dividends on our equity securities, and currently do not plan to declare dividends on shares of our common stock in the foreseeable future. We expect to retain our future earnings, if any, for use in the operation and expansion of our business. Subject to the foregoing, the payment of cash dividends in the future, if any, will be at the discretion of our Board of Directors and will depend upon such factors as earnings levels, capital requirements, our overall financial condition and any other factors deemed relevant by our Board of Directors. Additionally, any payment of a dividend would require the prior approval of our lender.

Securities Authorized for Issuance under Equity Compensation Plans

Information about our equity compensation plans is incorporated herein by reference to Part III, Item 12 of this Annual Report.

Item 6.Selected Financial Data.

Not applicable.

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Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion of our financial condition and results of operations should be read together with our financial statements and related notes included elsewhere in the Annual Report. This discussion contains forward-looking statements based upon our current plans, estimates, beliefs and expectations that involve risks, uncertainties and assumptions. Our actual results may differ materially from those anticipated in these forward-looking statements as a result of various factors, including those set forth under the sections entitled “Risk Factors,” “Special Note Regarding Forward-Looking Statements” and elsewhere in this Annual Report.

We are an early stage molecular oncology diagnostics company that develops and commercializes proprietary circulating tumor cell, or CTC, and circulating tumor DNA, or ctDNA, assays utilizing a standard blood sample, or “liquid biopsy.” Our current and planned assays are intended to provide information to aid healthcare providers to identify specific oncogenic alterations that may qualify a subset of cancer patients for targeted therapy at diagnosis, show progression or be used for monitoring in order to identify specific resistance mechanisms. Sometimes traditional procedures, such as surgical tissue biopsies, result in tumor tissue that is insufficient and/or unable to provide the molecular subtype information necessary for clinical decisions. Our assays, performed on blood, have the potential to provide more contemporaneous information on the characteristics of a patient’s disease when compared with tissue biopsy and radiographic imaging.

Our current assays and our planned future assays focus on key solid tumor indications utilizing our Target-Selector^TM liquid biopsy technology platform for the biomarker analysis of CTCs and ctDNA from a standard blood sample. Our patented Target-Selector CTC offering is based on an internally developed microfluidics-based cell capture and analysis platform, with enabling features that change how information provided by CTC testing is used by clinicians. Our CTC technology also could be validated on cerebral spinal fluid in order to provide information for patients with central nervous system tumors both primary and metastatic. Our patented Target-Selector ctDNA technology enables detection of mutations and genome alterations with enhanced sensitivity and specificity, and is applicable to nucleic acid from ctDNA, could potentially be validated for interrogating other sample types such as bone marrow, tissue (surgical resections and/or biopsies) or cerebrospinal fluid. Our Target-Selector CTC and ctDNA platforms provide both biomarker detection as well as monitoring capabilities and require only a patient blood sample. In January 2019, we began offering Research Use Only, or RUO, liquid biopsy kits containing our ctDNA Target Selector ctDNA technology to laboratories worldwide.

At our corporate headquarters facility located in San Diego, California, we operate a clinical laboratory that is certified under the Clinical Laboratory Improvement Amendments of 1988, or CLIA, and accredited by the College of American Pathologists, or CAP. We also performed the research and development that led to our current assays and continue to perform research and development for our planned assays, at this same facility. In addition, we currently manufacture our microfluidic channels and various chemistries utilized in our testing process, however, we have identified and have been working with a manufacturer to outsource certain manufacturing activities in the near term to reduce costs and improve efficiency. The assays we offer and intend to offer are classified as laboratory developed tests, or LDTs, under CLIA regulations. CLIA certification is required before any clinical laboratory, including ours, may perform testing on human specimens for the purpose of obtaining information for the diagnosis, prevention, or treatment of disease or the assessment of health. In addition, we participate in and have received CAP accreditation, which includes rigorous bi-annual laboratory inspections and requires adherence to specific quality standards.

Key Factors Affecting our Results of Operations and Financial Condition

Our overall long-term growth plan depends on our ability to continue to develop and commercialize products and assays through our CLIA-certified, CAP-accredited, and state-licensed laboratory. We have commercialized our Target-Selector assays for breast cancer, non-small cell lung cancer, or NSCLC, gastric cancer, colorectal cancer, prostate cancer, pancreaticobiliary cancer, and ovarian cancer, and plan to continue to launch a series of cancer diagnostic assays for different predictive biomarkers assays in the United States as LDTs performed in our laboratory, and enhance revenue for these products through the efforts of our sales and marketing organization. Our sales strategy is to engage medical oncologists, surgical oncologists, urologists, pulmonologists, pathologists and other physicians in the United States at private and group practices, hospitals and cancer centers. We also plan to continue to evaluate potential opportunities for the commercialization of our products and assays in other countries. Additionally, sales of our proprietary blood collection tubes, or BCTs, which allow for the intact transport of liquid biopsy samples for research use only, or RUO, from regions around the world, commenced during 2018. In addition to testing for physicians and their patients, we offer clinical trials testing and research services to help increase the efficiency and economic viability of clinical trials for pharmaceutical and biopharmaceutical

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companies and clinical research organizations both within and outside of the United States. We are currently exploring the possibility of introducing ctDNA technology outside the United States as part of IVD test kits and/or testing systems utilizing our Target-Selector technologies. We plan to continue to cooperate with partners on accessing markets internationally either through partnerships with local groups and distributors or through the development of IVDs and/or test systems, including instrumentation. We also have a research and development program focused on technology enhancements, novel platform development, and evaluating clinical applications for our cancer diagnostic tests in different cancer types and clinical settings.

To facilitate market adoption of our products and assays, we anticipate having to successfully complete additional clinical utility studies with clinical samples to generate clinical utility data and then publish our results in peer-reviewed scientific journals. Our ability to complete such clinical studies is dependent upon our ability to leverage our collaborative relationships with leading institutions to facilitate our research, to conduct the appropriate clinical studies and to obtain favorable clinical data. We collaborate with physicians and researchers at Sarah Cannon Research Institute, University of Colorado, the University of California, San Diego, the John Wayne Cancer Institute, Columbia University, Johns Hopkins Medical Institute, Vanderbilt University, University of Texas Southwestern Medical Center, and Georgetown University and plan to expand our collaborative relationships to include other key thought leaders at other institutions for the cancer types we target with our Target-Selector commercialized assays and our planned future assays, as well as for our current and planned future products. Such relationships help us develop and validate the effectiveness and utility of our products, commercialized assays and our planned future assays in specific, clinical settings and provide us access to patient samples and data.

We believe that the factors discussed in the following paragraphs have had and are expected to continue to have a material impact on our results of operations and financial condition.

Revenues

Our revenues are generated from diagnostic services provided to physicians and billed to third-party insurance payers such as managed care organizations, Medicare and Medicaid and patients for any deductibles, coinsurance or copayments that may be due. Commencing on January 1, 2018, we recognize revenue in accordance with Accounting Standards Codification, or ASC, Revenue from Contracts with Customers, or ASC 606, which requires that an entity recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services.

We bill third-party payers on a fee-for-service basis at our list price and third-party commercial revenue is recorded net of contractual discounts, payer-specific allowances and other reserves. Our development services revenues are supported by contractual agreements and generated from assay development services provided to entities, as well as certain other diagnostic services provided to physicians. Diagnostic services are completed upon the delivery of assay results to the prescribing physician, at which time we bill for the service.

Our gross commercial revenues billed are subject to estimated deductions for such contractual discounts, payer-specific allowances and other reserves to arrive at reported net revenues, which relate to differences between amounts billed and corresponding amounts estimated to be subsequently collected. These third-party payer discounts and sales allowances are estimated based on a number of assumptions and factors, including historical payment trends, seasonality associated with the annual reset of patient deductible limits on January 1 of each year, and current and estimated future payments. The estimates of amounts that will ultimately be realized from commercial diagnostic services require significant judgment by us. Patients do not enter into direct agreements with us that commit them to pay any portion of the cost of the tests in the event that they have not met their annual deductible limit under their insurance policy, if any, or if their insurance otherwise declines to reimburse us. Adjustments to the estimated payment amounts are recorded at the time of final collection and settlement of each transaction as an adjustment to commercial revenue.

Costs and Expenses

We classify our costs and expenses into four categories: cost of revenues, research and development, sales and marketing, and general and administrative. Our costs and expenses principally consist of facility costs and overhead, personnel costs, outside services and consulting costs, laboratory consumables, development costs, and legal fees.

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Cost of Revenues. Our cost of revenues consists principally of facility costs and overhead, personnel costs, and laboratory and manufacturing supplies and materials. We are pursuing various strategies to reduce and control our cost of revenues, including automating aspects of our processes, developing more efficient technology and methods, attempting to negotiate improved terms and volume discounts with our suppliers and exploring relocating our operations to a lower-cost facility.

Research and Development Expenses. We incur research and development expenses principally in connection with our efforts to develop and improve our tests. Our primary research and development expenses consist of direct personnel costs, laboratory equipment and consumables, and overhead expenses. We anticipate that research and development expenses will remain consistent in the near-term, principally to develop and validate tests in our pipeline and to perform work associated with clinical utility studies and development collaborations. In addition, we expect that our costs related to collaborations with research and academic institutions will increase. All research and development expenses are charged to operations in the periods in which they are incurred.

Sales and Marketing Expenses. Our sales and marketing expenses consist principally of personnel and related overhead costs for our sales team and their support personnel, travel and entertainment expenses, and other selling costs including sales collaterals and trade shows. We anticipate sales and marketing expenses to increase as we work on generating higher revenues and marketing additional offerings.

General and Administrative Expenses. General and administrative expenses consist principally of personnel-related expenses, professional fees, such as legal, accounting and business consultants, insurance costs, and other general expenses. We expect that our general and administrative expenses will increase as we expand our business operations. We further expect that general and administrative expenses will increase due to increased information technology, legal, insurance, accounting and financial reporting expenses associated with expanded commercial activities.

Critical Accounting Policies and Significant Judgments and Estimates

Our management’s discussion and analysis of financial condition and results of operations is based on our financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America. The preparation of our financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates based on historical experience and make various assumptions, which management believes to be reasonable under the circumstances, which form the basis for judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

The notes to our audited financial statements, which are included elsewhere in this Annual Report, contain a summary of our significant accounting policies. We consider the following accounting policies critical to the understanding of the results of our operations:

• Revenue recognition;

• stock-based compensation; and

• going concern.

Revenue Recognition and Related Reserves

Our commercial revenues are generated from diagnostic services provided to patient’s physicians and billed to third-party insurance payers such as managed care organizations, Medicare and Medicaid and patients for any deductibles, coinsurance or copayments that may be due. Commencing on January 1, 2018, we recognize revenue in accordance with ASC 606, Revenue from Contracts with Customers, or ASC 606, which requires that an entity recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. We adopted the provisions of ASC 606 using the modified retrospective application method applied to all contracts, which did not impact amounts previously reported by us, nor did it require a cumulative effect adjustment upon adoption, as our method of recognizing revenue under ASC 606 was analogous to the method utilized immediately prior to adoption. 

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Contracts

For our commercial revenues, while we market directly to physicians, our customer is the patient. Patients do not enter into direct agreements with us, however, a patient’s insurance coverage requirements would dictate whether or not any portion of the cost of the tests would be patient responsibility. Accordingly, we establish a contract with a commercial patient in accordance with other customary business practices, as follows:

• Approval of a contract is established via the order and accession, which are submitted by the patient’s physician.

• We are obligated to perform our diagnostic services upon receipt of a sample from a physician, and the patient and/or applicable payer are obligated to reimburse us for services rendered based on the patient’s insurance benefits.

• Payment terms are a function of a patient’s existing insurance benefits, including the impact of coverage decisions with CMS and applicable reimbursement contracts established between us and payers, unless the patient is a self-pay patient, whereby we bill the patient directly after the services are provided.

• Once we deliver a patient’s assay result to the ordering physician, the contract with a patient has commercial substance, as we are legally able to collect payment and bill an insurer and/or patient, regardless of payer contract status or patient insurance benefit status.

• Consideration associated with commercial revenues is considered variable and constrained until fully adjudicated, with net revenues recorded to the extent that it is probable that a significant reversal will not occur.

Our development services revenues are supported by contractual agreements and generated from assay development services provided to entities, as well as certain other diagnostic services provided to physicians, and revenues are recognized upon delivery of the performance obligations in the contract.

Performance Obligations

A performance obligation is a promise in a contract to transfer a distinct good or service, or a bundle of goods or services, to the customer. For commercial and development services revenues, our contracts have a single performance obligation, which is satisfied upon rendering of services, which culminates in the delivery of a patient’s assay result(s) to the ordering physician or entity. The duration of time between accession receipt and delivery of a valid assay result to the ordering physician or entity is typically less than two weeks. Accordingly, we elected the practical expedient and therefore, we do not disclose the value of unsatisfied performance obligations.

Transaction Price

The transaction price is the amount of consideration that we expect to collect in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties, such as sales taxes. The consideration expected from a contract with a customer may include fixed amounts, variable amounts, or both. Our gross commercial revenues billed, and corresponding gross accounts receivable, are subject to estimated deductions for such allowances and reserves to arrive at reported net revenues, which relate to differences between amounts billed and corresponding amounts estimated to be subsequently collected, and is deemed to be variable although the variability is not explicitly stated in any contract. Rather, the implied variability is due to several factors, such as the payment history or lack thereof for third-party payers, reimbursement rate changes for contracted and non-contracted payers, any patient co-payments, deductibles or compliance incentives, the existence of secondary payers and claim denials. We estimate the amount of variable consideration using the most likely amount approach to estimating variable consideration for third-party payers, including direct patient bills, whereby the estimated reimbursement for services are established by payment histories on CPT codes for each payer, or similar payer types. When no payment history is available, the value of the account is estimated at Medicare rates, with additional other payer-specific reserves taken as appropriate. Collection periods for billings on commercial revenues range from less than 30 days to several months, depending on the contracted or non-contracted nature of the payer, among other variables. The estimates of amounts that will ultimately be realized from commercial diagnostic services for non-contracted payers require significant judgment by management.

We limit the amount of variable consideration included in the transaction price to the unconstrained portion of such consideration. Revenue is recognized up to the amount of variable consideration that is not subject to a significant reversal until additional information is obtained or the uncertainty associated with the additional payments or refunds is subsequently

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resolved. Differences between original estimates and subsequent revisions, including final settlements, represent changes in the estimate of variable consideration and are included in the period in which such revisions are made. We monitor our estimates of transaction price to depict conditions that exist at each reporting date. If we subsequently determine that we will collect more consideration than we originally estimated for a contract with a customer, we will account for the change as an increase in the estimate of the transaction price in the period identified as an increase to revenue. Similarly, if we subsequently determine that the amount it expects to collect from a customer is less than it originally estimated, we will generally account for the change as a decrease in the estimate of the transaction price as a decrease to revenue, provided that such downward adjustment does not result in a significant reversal of cumulative revenue recognized. Revenue recognized from changes in transaction prices was not significant during the years ended December 31, 2018 and 2019.

Allocate Transaction Price

For our commercial revenues, the entire transaction price is allocated to the single performance obligation contained in a contract with a customer. For our development services revenues, the contracted transaction price is allocated to each single performance obligation contained in a contract with a customer as performed.

Point-in-time Recognition

Our single performance obligation is satisfied at a point in time, and that point in time is defined as the date a patient’s successful assay result is delivered to the patient’s ordering physician or entity. We consider this date to be the time at which the patient obtains control of the promised diagnostic assay service. 

Contract Balances

The timing of revenue recognition, billings and cash collections results in accounts receivable recorded in our balance sheets. Generally, billing occurs subsequent to delivery of a patient’s test result to the ordering physician or entity, resulting in an account receivable.  

Practical Expedients

We do not adjust the transaction price for the effects of a significant financing component, as at contract inception, we expect the collection cycle to be one year or less.

We expense sales commissions when incurred because the amortization period is one year or less, which are recorded within sales and marketing expenses.  

We incur certain other costs that are incurred regardless of whether a contract is obtained. Such costs are primarily related to legal services and patient communications. These costs are expensed as incurred and recorded within general and administrative expenses. 

Stock-Based Compensation

We account for stock-based compensation under the provisions of ASC Topic 718, Compensation—Stock Compensation, which requires the measurement and recognition of compensation expense for all stock-based awards made to employees and directors based on estimated fair values on the grant date. We estimate the fair value of stock option awards on the date of grant using the Black-Scholes option pricing model, or Black-Scholes valuation model. The fair value of RSUs is determined by the price of our common stock on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods using the straight-line method. We estimate forfeitures at the time of grant and revise our estimates in subsequent periods if actual forfeitures differ from those estimates.

We account for stock-based compensation awards to non-employees in accordance with ASC Topic 505-50, Equity-Based Payments to Non-Employees. Under ASC 505-50, we determine the fair value of the warrants or stock-based compensation awards granted as either the fair value of the consideration received, or the fair value of the equity instruments issued, whichever is more reliably measurable. All issuances of equity instruments issued to non-employees as consideration for goods or services received by us are accounted for based on the fair value of the equity instruments issued. These awards are

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recorded in expense and additional paid-in capital in stockholders’ equity over the applicable service periods based on the fair value of the options at the end of each period.

Calculating the fair value of stock-based awards requires the input of highly subjective assumptions into the Black-Scholes valuation model. Stock-based compensation expense is calculated using our best estimate, which involves inherent uncertainties, and the application of our management’s judgment. Significant estimates include the fair value of our common stock at the date of grant for awards granted prior to our initial public offering, the expected life of the stock option, stock price volatility, risk-free interest rate and forfeiture rate.

Going Concern

We assess and determine our ability to continue as a going concern under the provisions of ASC Topic 205-40, Presentation of Financial Statements—Going Concern, which requires us to evaluate whether there are conditions or events that raise substantial doubt about our ability to continue as a going concern within one year after the date that our annual and interim financial statements are issued. Certain additional financial statement disclosures are required if such conditions or events are identified. If and when an entity’s liquidation becomes imminent, financial statements should be prepared under the liquidation basis of accounting.

Determining the extent, if any, to which conditions or events raise substantial doubt about our ability to continue as a going concern, or the extent to which mitigating plans sufficiently alleviate any such substantial doubt, as well as whether or not liquidation is imminent, requires significant judgment by us. We have determined that there is substantial doubt about our ability to continue as a going concern for the one-year period following the date that our financial statements for the year ended December 31, 2019 were issued, which have been prepared assuming that we will continue as a going concern. We have not made any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the possible inability of us to continue as a going concern.

Reverse Split

In July 2018, our stockholders approved, and we filed, an amendment to our Certificate of Amendment of Certificate of Incorporation to effect a one-for-thirty reverse stock split of our outstanding common stock. All references to share and per share amounts in our financial statements and accompanying notes have been restated to reflect the one-for-thirty reverse stock split, except for the authorized number of shares of the Company’s common stock of 150,000,000 shares, which was not affected by the one-for-thirty reverse stock split.

Coronavirus (COVID-19) Pandemic

On March 11, 2020 the World Health Organization declared the novel strain of coronavirus (COVID-19) a global pandemic and recommended containment and mitigation measures worldwide. In addition, as we are located in California, we are currently under a shelter-in-place mandate and many of our clients worldwide are similarly impacted.  The global outbreak of the COVID-19 coronavirus continues to rapidly evolve, and the extent to which the COVID-19 coronavirus may impact our business will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the ultimate geographic spread of the disease, the duration of the outbreak, travel restrictions and social distancing in the United States and other countries, business closures or business disruptions, and the effectiveness of actions taken in the United States and other countries to contain and treat the disease.  While we are still receiving specimens from clients on a daily basis, we anticipate a potential slowdown in volume as many clinic visits are being re-scheduled and delayed.  We are continuing to vigilantly monitor the situation with our primary focus on the health and safety of our employees and clients.

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Results of Operations

Years Ended December 31, 2018 and 2019

The following table sets forth certain information concerning our results of operations for the periods shown:

	For the year ended December 31,						Change
	2018			2019			$			%
(dollars in thousands)
Net revenues	$	3,250		$	5,529		$	2,279			70	%
Cost of revenues		10,052			10,978			926			9	%
Research and development expenses		4,469			4,697			228			5	%
General and administrative expenses		7,074			6,970			(104	)		(1	%)
Sales and marketing expenses		5,915			5,941			26			0	%
Loss from operations		(24,260	)		(23,057	)		1,203			(5	%)
Interest expense, net		(310	)		(250	)		60			(19	%)
Other income		—			(1,831	)		(1,831	)		0	%
Loss before income taxes		(24,570	)		(25,138	)		(568	)		2	%
Income tax expense		(2	)		—			2			(100	%)
Net loss		(24,572	)		(25,138	)		(566	)		2	%
Deemed dividend related to warrants down round provision		(636	)		(122	)		514			(81	%)
Net lossattributable to common shareholders	$	(25,208	)	$	(25,260	)	$	(52	)		0	%

The composition of the Company’s net revenues recognized during the years ended December 31, 2018 and 2019, disaggregated by source and timing of recognition, are as follows:

	For the year ended December 31,
	2018		2019
Net commercial revenues recognized upon delivery	$	3,042,122	$	5,116,210
Development services revenues recognized upon delivery		198,736		212,344
Kits and Blood Collection Tubes (BCT)		9,440		200,012
Total net revenues	$	3,250,298	$	5,528,566

Net Revenues

Net revenues were approximately $5,529,000 for the year ended December 31, 2019, compared with approximately $3,250,000 for the year ended December 31, 2018, an increase of $2,279,000, or 70%, which is primarily due to an increase in accession volume over the prior year.  The increase in net revenues is due to an increase in accession volumes, which is partially attributable to the increase in the urology business specifically targeted as our growth strategy.  In addition, we had an increase in the number of tests ordered per accession which is partially attributable to the launching of new assays in 2019.

The net estimated revenue per commercial accession delivered during the year ended December 31, 2019 was $1,202, based on 4,256 commercial accessions delivered, while during the year ended December 31, 2018 it was approximately $982, based on 3,097 commercial accessions delivered. 

The following table sets forth certain information regarding commercial accessions received during the years ended December 31, 2018 and 2019, as follows:

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	Year ended December 31,				Change
	2018		2019		# / $		%
# Commercial accessions received		3,273		4,425		1,152		35	%
$ Value estimated per commercial accession received *	$	1,197	$	1,248	$	51		4	%

*Commercial value per accession received is reflected as expected reimbursement (gross billed less contractual allowance).

Additionally, there was a $14,000 increase in development services revenues during the year ended December 31, 2019 as compared to the prior year, which was primarily related to an increase in values per development services accessions delivered, as follows:

	Year ended December 31,				Change
	2018		2019		#			%
# Development services cases delivered		620		509		(111	)		(18	%)
$ Value estimated per development services accession    Delivered	$	321	$	361	$	40			12	%

Costs and Expenses

Cost of Revenues.Cost of revenues was approximately $10,978,000 for the year ended December 31, 2019, compared with approximately $10,052,000 for the year ended December 31, 2018 as we continued to leverage the fixed components of our costs.  As a result, cost of revenues as a percentage of net revenues decreased by 110.7% for the year ended December 31, 2019 as compared to the prior year. Cost of revenues are comprised of, but not limited to, expenses related to personnel costs, materials, shipping and other direct costs, as well as equipment depreciation and software amortization expenses.

Research and Development Expenses. Research and development expenses were approximately $4,697,000 for the year ended December 31, 2019, compared with approximately $4,469,000 for the year ended December 31, 2018, an increase of $228,000, or 5%. The increase was primarily attributable to development and validation costs related to additional tests. Research and development expenses are comprised of, but not limited to, personnel costs, material, shipping and other direct costs, computer and laboratory equipment maintenance and facility related costs.  

General and Administrative Expenses. General and administrative expenses were approximately $6,970,000 for the year ended December 31, 2019, compared with approximately $7,074,000 for the year ended December 31, 2018, a decrease of $104,000, or 1%, resulting from cost savings efforts. The decrease was primarily attributable to a lower consulting, outside service and legal and patent costs compared to the prior year. General and administrative expenses are comprised of, but not limited to, personnel costs, facilities, depreciation, repairs and maintenance costs, stock-based compensation expenses, patent and legal costs, accounting and audit fees, as well as insurance, office and other expenses.

Sales and Marketing Expenses. Sales and marketing expenses were approximately $5,941,000 for the year ended December 31, 2019 compared with approximately $5,915,000 for the year ended December 31, 2018, an increase of $26,000. The increase was primarily attributable to higher volume and revenues during the period. Sales and marketing expenses are comprised of, but not limited to, personnel costs, trade show and other marketing related expenses, as well as office and other costs.

Interest Expenses.  Interest expenses were $250,000 for the year ended December 31, 2019, compared to $310,000 for the year ended December 31, 2018, representing a reduction of $60,000 or 19%.  This was primarily the result of the Oxford term loan having been paid off mid-year 2018.

Income Tax Expense

Over the past several years we have generated operating losses in all jurisdictions in which we may be subject to income taxes. As a result, we have accumulated significant net operating losses and other deferred tax assets. Because of our history of losses and the uncertainty as to the realization of those deferred tax assets, a full valuation allowance has been recognized.

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We do not expect to report a provision for income taxes until we have a history of earnings, if ever, that would support the realization of our deferred tax assets.

We have not completed a study to assess whether an ownership change has occurred or whether there have been multiple ownership changes since our formation, due to the complexity and cost associated with such a study, and the fact that there may be additional ownership changes in the future, however, we believe ownership changes likely occurred in each year from 2015 through 2019. As a result, we have estimated that the use of our net operating loss and research and development tax credit carryforwards that can be used in the future remain fully offset by a valuation allowance to reduce the net asset to zero.

Inflation

We do not believe that inflation has had a material adverse impact on our business or operating results during the periods presented.

Liquidity and Capital Resources

We are actively working to improve our financial position and enable the growth of our business, by raising new capital and generating revenues.

Cash Flows

Our net cash flow from operating, investing and financing activities for the periods below were as follows:

	For the year ended December 31,
	2018			2019
(dollars in thousands)
Cash provided by/(used in):
Operating activities	$	(22,355	)	$	(23,049	)
Investing activities		(145	)		(734	)
Financing activities		23,777			29,661
Net increase/(decrease) in cash	$	1,277		$	5,878

Cash Used in Operating Activities. Net cash used in operating activities was $23.0 million for the year ended December 31, 2019, compared to net cash used in operating activities of $22.4 million for the year ended December 31, 2018. The net increase of $694,000 in cash used was primarily related to an increase in our accounts receivable balance of approximately $1.6 million. During the year ended December 31, 2019 we recorded a non-cash warrant inducement expense of $1.8 million related to the May 2019 warrant inducement transaction.

Cash Used in Investing Activities. Net cash used in investing activities of approximately $734,000 and $145,000 during the years ended December 31, 2019 and 2018, respectively, was related to purchases of fixed assets.

Cash Provided by Financing Activities. Net cash provided by financing activities was $29.7 million for the year ended December 31, 2019, compared to net cash provided by financing activities of $23.8 million for the year ended December 31, 2018. Our primary sources of cash from financing activities during the year ended December 31, 2019 consisted of $2.0 million in net proceeds from our offering of common stock in January 2019, $6.6 million in net proceeds from our sale of common stock and warrants in February 2019, $0.6 million in net proceeds from the exercise of the placement agent’s overallotment option from the January 2019 transaction, $7.6 million in net proceeds from our sale of common stock and warrants in March 2019, $4.9 million in proceeds from exercise of common stock warrants, and $9.0 million in net proceeds from our December 2019 financing transaction. Our primary sources of cash from financing activities during the year ended December 31, 2018 consisted of $13.3 million, $10.1 million and $2.2 million in net proceeds from our offerings in January, August and September 2018, respectively, which were partially offset by $1.9 million of principal payments made on indebtedness.

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Liquidity, Capital Resources and Expenditure Requirements

We expect to continue to incur substantial operating losses in the future. It may take several years to achieve positive operational cash flow, or we may not ever achieve positive operational cash flow. We expect that we will use the net proceeds from our sale of equity securities, if any, cash received from the licensing of our technology, if any, and our revenues from operations to support increased sales and marketing activities, fund further research and development, clinical utility studies and future enhancements of our assays, acquire equipment, implement automation and scale our capabilities to prepare for significant assay volume, for general corporate purposes and to fund ongoing operations and the expansion of our business, including the increased costs associated with expanded commercial activities. We may also use the net proceeds from our sale of equity securities, if any, cash received from the licensing of our technology, if any, and our revenues from operations to acquire or invest in businesses, technologies, services or products, although we do not have any current plans to do so.

On January 18, 2019, we completed an offering of 990,000 shares of our common stock at a purchase price of $2.25 per share raising net proceeds of approximately $2.0 million.  On February 12, 2019, we completed an offering of 6,250,000 shares of our common stock and warrants at a combined offering price of $1.20 per unit, raising approximately $6.6 million, and on March 11, 2019, the underwriters exercised their overallotment option under the February 2019 transaction and purchased 538,867 shares from us for total proceeds of $601,000.  In addition, on March 19, 2019, we completed an offering of 5,950,000 shares of common stock and warrants at an offering price of $1.37 per share raising approximately $7.6 million in net proceeds.  In May 2019, investors exercised warrants for 4.1 million shares of common stock at exercise prices ranging from $1.20 to $1.25 per share resulting in net cash proceeds to the Company totaling $4.8 million.  Approximately 2.1 million shares of the warrants exercised was pursuant to a warrant inducement transaction raising approximately $2.3 million of net proceeds of the total $4.8 million raised. On December 9, 2019, we completed an underwritten offering of 19.2 million shares of our common stock, prefunded warrants to purchase 5.4 million shares of our common stock, and 24.6 million warrants to purchase our common stock at a combined purchase price of $0.405 per share, raising approximately $9.0 million in net proceeds.

As of December 31, 2019, our cash totaled $9.3 million, and our outstanding net indebtedness totaled $1.7 million. While we currently are in the commercialization stage of operations, we have not yet achieved profitability and anticipate that we will continue to incur net losses for the foreseeable future. We have determined that there is substantial doubt about our ability to continue as a going concern for the one-year period following the date that our financial statements for the year ended December 31, 2019 were issued, and we expect that we will need additional financing to execute on our current or future business strategies beyond the end of 2020.

We expect that we will need additional financing to execute on our current or future business strategies. Until we can generate significant cash from operations, including assay revenues, we expect to continue to fund operations with the proceeds from offerings of our equity securities or debt, or transactions involving product development, technology licensing or collaboration. For example, we have an effective shelf registration statement on file with the SEC which allows us to issue any combination of our common stock, preferred stock, debt securities and warrants from time to time until expiry on May 21, 2021, subject to certain restrictions that apply for so long as our public float is less than $75 million. The specific terms of additional future offerings, if any, under this shelf registration statement would be established at the time of such offerings. We can provide no assurances that any sources of a sufficient amount of financing will be available to us on favorable terms, if at all. If we are unable to raise a sufficient amount of financing in a timely manner, we would likely need to scale back our general and administrative activities and certain of our research and development activities. Our forecast pertaining to our current financial resources and the costs to support our general and administrative and research and development activities are forward-looking statements and involve risks and uncertainties. Actual results could vary materially and negatively as a result of a number of factors, including:

• our ability to secure financing and the amount thereof;

• the costs of operating and enhancing our laboratory facilities;

• the costs of developing our anticipated internal sales and marketing capabilities;

• the scope, progress and results of our research and development programs, including clinical utility studies;

• the scope, progress, results, costs, timing and outcomes of the clinical utility studies for our diagnostic assays;

• our ability to manage the costs for manufacturing our microfluidic channels;

• the costs of maintaining, expanding and protecting our intellectual property portfolio, including potential litigation costs and liabilities;

76

• our ability to obtain adequate reimbursement from governmental and other third-party payers for our assays and services;

• the costs of additional general and administrative personnel, including accounting and finance, legal and human resources, as a result of becoming a public company;

• our ability to collect revenues; and

• other risks discussed in our other filings with the SEC.

We may raise additional capital to fund our current operations and to fund expansion of our business to meet our long-term business objectives through public or private equity offerings, debt financings, borrowings or strategic partnerships coupled with an investment in our company or a combination thereof. If we raise additional funds through the issuance of convertible debt securities, or other debt securities, these securities could be secured and could have rights senior to those of our common stock. In addition, any new debt incurred by us could impose covenants that restrict our operations. The issuance of any new equity securities will also dilute the interest of our current stockholders. Given the risks associated with our business, including our unprofitable operating history and our ability or inability to develop additional assays, additional capital may not be available when needed on acceptable terms, or at all. If adequate funds are not available, we will need to curb our expansion plans or limit our research and development activities, which would have a material adverse impact on our business prospects and results of operations.

Off-Balance Sheet Arrangements

We have not engaged in any off-balance sheet arrangements as defined in Item 303(a)(4) of Regulation S-K.

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

Not applicable.

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Item 8. Financial Statements and Supplementary Data

Biocept, Inc.

Index to Financial Statements

	Page No.
Financial Statements:
Report of Independent Registered Public Accounting Firm	79
Balance Sheets at December 31, 2019 and 2018	80
Statements of Operations and Comprehensive Loss for the Years Ended December 31, 2019 and 2018	81
Statements of Shareholders’ Equity for the Years Ended December 31, 2019 and 2018	82
Statements of Cash Flows for the Years Ended December 31, 2019 and 2018	83
Notes to Financial Statements	86

78

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders of Biocept, Inc.

Opinion on the Financial Statements

We have audited the accompanying balance sheets of Biocept, Inc. (“Company”) as of December 31, 2019 and 2018, and the related statements of operations and comprehensive loss, shareholders’ equity and cash flows for each of the two years in the period ended December 31, 2019, and the related notes  (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2019 and 2018 and the results of its operations and its cash flows for each of the two years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.

Going Concern Uncertainty

The accompanying financial statements have been prepared assuming that the Company will continue as a going concern. As discussed in Note 2 to the financial statements, the Company has incurred recurring losses from operations and is dependent on future financings to fund operations. These conditions raise substantial doubt about its ability to continue as a going concern. Management’s plan regarding these matters is also described in Note 2. The financial statements do not include any adjustments that might result from the outcome of this uncertainty.

Adoption of New Accounting Standard

As discussed in Note 3 to the financial statements, the Company changed its method of accounting for leases as a result of the adoption of Accounting Standards Codification Topic 842, Leases, effective January 1, 2019, under the modified retrospective method.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB") and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

We have served as the Company’s auditor since 2005.

/s/ Mayer Hoffman McCann P.C.

San Diego, California

March 27, 2020

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Biocept, Inc.

Balance Sheets

	December 31,			December 31,
	2018			2019
Current assets:
Cash	$	3,423,373		$	9,301,406
Accounts receivable, net		1,574,325			3,527,078
Inventories, net		587,222			767,986
Prepaid expenses and other current assets		425,961			296,127
Total current assets		6,010,881			13,892,597
Fixed assets, net		2,739,422			1,504,330
Lease right-of-use assets - operating		—			729,330
Lease right-of-use assets - finance		—			1,606,387
Total assets	$	8,750,303		$	17,732,644
Current liabilities:
Accounts payable	$	2,039,718		$	2,011,827
Accrued liabilities		1,928,393			1,980,204
Current portion of equipment financings		641,536			—
Current portion of lease liabilities - operating		—			842,452
Current portion of lease liabilities - finance		—			724,329
Total current liabilities		4,609,647			5,558,812
Non-current portion of equipment financings		985,015			—
Non-current portion of lease liabilities - finance		—			973,189
Non-current portion of deferred rent		113,122			—
Total liabilities		5,707,784			6,532,001
Commitments and contingencies (see Note 16)
Shareholders’ equity:
Preferred stock, $0.0001 par value, 5,000,000 shares authorized; 4,417 shares and 2,133 shares issued and outstanding at December 31, 2018 and 2019, respectively.		—			—
Common stock, $0.0001 par value, 150,000,000 shares authorized; 4,629,174 shares issued and outstanding at December 31, 2018; 54,738,485 shares issued and outstanding at December 31, 2019.		463			5,474
Additional paid-in capital		223,499,634			256,912,358
Accumulated deficit		(220,457,578	)		(245,717,189	)
Total shareholders’ equity		3,042,519			11,200,643
Total liabilities and shareholders’ equity	$	8,750,303		$	17,732,644

The accompanying notes are an integral part of these financial statements.

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Biocept, Inc.

Statements of Operations and Comprehensive Loss

	For the years ended December 31,
	2018			2019
Net revenues	$	3,250,298		$	5,528,566
Costs and expenses:
Cost of revenues		10,051,735			10,977,520
Research and development expenses		4,468,572			4,697,022
General and administrative expenses		7,074,024			6,970,120
Sales and marketing expenses		5,914,706			5,940,843
Total costs and expenses		27,509,037			28,585,505
Loss from operations		(24,258,739	)		(23,056,939	)
Other income/(expense):
Interest expense, net		(310,976	)		(249,984	)
Warrant inducement expense		—			(1,831,116	)
Total other income/(expense):		(310,976	)		(2,081,100	)
Loss before income taxes		(24,569,715	)		(25,138,039	)
Income tax expense		(1,886	)		—
Net loss and comprehensive loss	$	(24,571,601	)	$	(25,138,039	)
Deemed dividend related to warrants down round provision		(636,370	)		(121,572	)
Net loss attributable to common shareholders	$	(25,207,971	)	$	(25,259,611	)
Weighted-average shares outstanding used in computing net loss per share attributable to common shareholders:
Basic		2,798,243			20,660,894
Diluted		2,798,243			20,660,894
Net loss per common share:
Basic	$	(9.01	)	$	(1.22	)
Diluted	$	(9.01	)	$	(1.22	)

The accompanying notes are an integral part of these financial statements.

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Biocept, Inc.

Statements of Shareholders’ Equity

	Common Stock				Series A Convertible Preferred Stock						Additional			Accumulated
	Shares		Amount		Shares			Amount			Paid-in Capital			Deficit			Total
Balance at December 31, 2017		1,181,179		118		—			—			196,545,523			(195,249,607	)		1,296,034
Stock-based compensation expense		—		—		—			—			623,412			—			623,412
Shares issued for restricted stock units		5,833		1		—			—			(1	)		—			—
Shares issued upon exercise of pre-funded common stock warrants		120,000		12		—			—			1,188			—			1,200
Deemed dividends related warrants downround provision		—		—		—			—			636,370			(636,370	)		—
Shares and warrants issued for January 2018 financing transaction, net of issuance costs		1,095,153		110		—			—			13,342,709			—			13,342,819
Shares and warrants issued for August 2018 rights offering, net of issuance costs		—		—		11,587			1			10,097,861			—			10,097,862
Shares and warrants issued for September 2018 registered direct offering, net of issuance costs		642,438		64		—			—			2,252,729			—			2,252,793
Shares issued upon conversion of preferred stock		1,584,571		158		(7,170	)		(1	)		(157	)		—			—
Net loss		—		—		—			—			—			(24,571,601	)		(24,571,601	)
Balance at December 31, 2018		4,629,174		463		4,417			—			223,499,634			(220,457,578	)		3,042,519
Stock-based compensation expense		—		—		—			—			869,579			—			869,579
Shares issued upon exercise of common stock warrants		4,155,430		416		—			—			4,850,055			—			4,850,471
Shares issued upon cashless exercise of common stock warrants		7,120,250		712		—			—			(712	)		—			—
Shares issued upon exercise of pre-funded common stock warrants		5,400,000		540		—			—			53,460			—			54,000
Deemed dividends related warrants downround provision		—		—		—			—			121,572			(121,572	)		—
Shares issued for January 2019 financing transaction, net of issuance costs		990,000		99		—			—			2,032,212			—			2,032,311
Shares and warrants issued for February 2019 financing, net of issuance costs		6,250,000		625		—			—			6,602,110			—			6,602,735
Shares issued for January 2019 financing transaction overallotment, net of issuance costs		538,867		54		—			—			592,252			—			592,306
Shares and warrants issued for March 2019 financing transaction, net of issuance costs		5,950,000		595		—			—			7,553,198			—			7,553,793
Shares and warrants issued for December 2019 underwritten offering, net of issuance costs		19,200,000		1,920		—			—			8,907,932			—			8,909,852
Warrant inducement expense		—		—		—			—			1,831,116			—			1,831,116
Shares issued upon conversion of preferred stock		504,764		50		(2,284	)		—			(50	)		—			—
Net loss		—		—		—			—			—			(25,138,039	)		(25,138,039	)
Balance at December 31, 2019		54,738,485	$	5,474		2,133		$	—		$	256,912,358		$	(245,717,189	)	$	11,200,643

The accompanying notes are an integral part of these financial statements.

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Biocept, Inc.

Statements of Cash Flows

	For the years ended December 31,
	2018			2019
Cash Flows from Operating Activities
Net loss	$	(24,571,601	)	$	(25,138,039	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		800,905			931,655
Amortization of right-of-use assets		—			(158,341	)
Inventory reserve		(38,499	)		14,167
Stock-based compensation		623,412			869,579
Non-cash interest expense related to credit facility and other financing activities		29,426			—
Warrant inducement expense		—			1,831,116
Increase/(decrease) in cash resulting from changes in:
Accounts receivable, net		(380,899	)		(1,952,753	)
Inventory		(50,021	)		(194,928	)
Prepaid expenses and other current assets		488,505			523,293
Accounts payable		601,872			14,838
Accrued liabilities		460,972			210,152
Accrued interest		(202,609	)		—
Deferred rent		(116,681	)		—
Net cash used in operating activities		(22,355,218	)		(23,049,261	)
Cash Flows from Investing Activities:
Purchases of fixed assets		(145,253	)		(735,300	)
Net cash used in investing activities		(145,253	)		(735,300	)
Cash Flows from Financing Activities:
Net proceeds from issuance of common stock and warrants		25,693,474			25,744,997
Proceeds from exercise of common stock warrants		1,200			2,513,173
Proceeds from warrant exercise inducement		—			2,337,298
Payments on finance leases		(160,381	)		(539,415	)
Payments on supplier and other third-party financings		(559,092	)		(393,459	)
Payments on credit facility		(1,197,968	)		—
Net cash provided by financing activities		23,777,233			29,662,594
Net increase in Cash		1,276,762			5,878,033
Cash at Beginning of Period		2,146,611			3,423,373
Cash at End of Period	$	3,423,373		$	9,301,406
Supplemental Disclosures of Cash Flow Information:
Cash paid during the period for:
Interest	$	605,485		$	249,984
Income taxes	$	4,517		$	—

The accompanying notes are an integral part of these financial statements.

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Non-cash Investing and Financing Activities:

During the years ended December 31, 2018 and 2019, Biocept, Inc., or the Company, financed insurance premiums of approximately $488,000 and $393,000, respectively, through third-party financings (see Note 9). During the year ended December 31, 2018, the Company cancelled insurance premiums previously financed through third parties with no remaining principal balance outstanding at year end.

Fixed assets purchased totaling approximately $279,000 and $632,000 during the years ended December 31, 2018 and 2019, respectively, were recorded as finance lease obligations and were excluded from cash purchases in the Company’s statements of cash flows (see Note 8).

The amount of unpaid fixed asset purchases excluded from cash purchases in the Company’s statements of cash flows decreased from approximately$25,000 at December 31, 2018 to $32,000 at December 31, 2019.

An offering of 1,095,153 shares of the Company’s common stock and warrants to purchase up to an aggregate of 1,095,153 shares of its common stock at a combined offering price of $13.50 per unit occurred on January 30, 2018. As of December 31, 2019, all warrants sold in this offering have an exercise price of $0.405 per share, subject to down round adjustment, are exercisable immediately and expire five years from the date of issuance. The estimated aggregate grant date fair value on a relative fair value basis was approximately $9.7 million associated with these warrants was recorded as an offset to additional paid-in capital (see Note 4). Additionally, approximately $1.4 million of fees and costs directly associated with this offering were recorded as an offset to additional paid-in capital in accordance with applicable accounting guidance.

A rights offering for the Company’s Series A preferred stock and warrants was completed on August 13, 2018. Pursuant to the rights offering the Company sold 11,587 units consisting of an aggregate of 11,587 shares of Series A Preferred Stock and 2,549,140 warrants, with each warrant exercisable for one share of Common Stock at an exercise price of $4.53 per share. The gross amount raised in the rights offering was $11.6 million. All warrants sold in this offering have an exercise price of $4.53 per share, are exercisable immediately and expire five years from the date of issuance. The estimated aggregate grant date fair value on a relative fair value basis of approximately $8.4 million was recorded as an offset to additional paid-in capital (see Note 4). Additionally, approximately $1.4 million of fees and costs directly associated with this offering were recorded as an offset to additional paid-in capital in accordance with applicable accounting guidance. During the years ended December 31, 2018 and 2019, 7,170 and 2,284 shares of Series A Preferred Stock were converted into 1,584,571 and 504,764 shares of common stock, respectively.

An offering of 642,438 shares of the Company’s common stock and prefunded warrants to purchase up to an aggregate of 120,000 shares of its common stock occurred on September 20, 2018. The shares were sold at a purchase price of $3.285 per share and the pre-funded warrants were sold at a purchase price of $3.275 per pre-funded warrant which represents the per share purchase price for the shares less the $0.01 per share exercise price for each such pre-funded warrant. The aggregate gross proceeds from the offering were approximately $2.5 million. In addition, in a concurrent private placement, the Company issued to purchasers a warrant to purchase one share of the Company’s common stock for each share and pre-funded warrant purchased for cash in the offering. All warrants issued in this offering have an exercise price of $3.16 per share, are exercisable upon the six-month anniversary of issuance and expire five years from such date. The estimated aggregate grant date fair value on a relative fair value basis of approximately $2.0 million associated with these warrants was recorded as an offset to additional paid-in capital (see Note 4). Additionally, approximately $0.3 million of fees and costs directly associated with this offering were recorded as an offset to additional paid-in capital in accordance with applicable accounting guidance.

The issuance of warrants with an exercise price of $3.16 in the September 2018 financing transaction triggered the down round provision in the January 2018 warrants, resulting in recording a deemed dividend related to the warrants down round provision in the amount of approximately $636,000 increasing the net loss attributable to common shareholders.

On January 1, 2019, the Company adopted the accounting rules in ASC Topic 842, Leases (ASC 842), and as a result, recorded net lease right-of-use assets of $1.9 million related to its operating lease, and recorded operating lease liabilities of $2.2 million.  In addition, in accordance with the guidance, $1.4 million of assets under capital leases previously classified in the property, plant, and equipment section of the balance sheet were reclassified to lease right-of-use assets.

84

On January 18, 2019, the Company completed an offering of 990,000 shares of the Company’s common stock. The shares were sold at a purchase price of $2.25 per share and the net proceeds to the Company from this offering were approximately $2.0 million, after deducting expenses related to the offering including dealer-manager fees and expenses.

On February 12, 2019, the Company received net cash proceeds of approximately $6.6 million as a result of the closing of a follow-on public offering of 6,250,000 shares of its common stock and warrants to purchase up to an aggregate of 6,250,000 shares of its common stock at a combined offering price of $1.20 per unit. All warrants sold in this offering have an exercise price of $1.20 per share, are exercisable immediately and expire five years from the date of issuance. In addition, the Company sold warrants to purchase up to an aggregate of 937,500 shares of the Company’s common stock in connection with the partial exercise of the over-allotment option granted to the underwriters. Upon closing of the transaction, warrants to purchase 915,000 shares were issued pursuant to the placement agents’ partial exercise of their overallotment.  The estimated aggregate grant date fair value on a relative fair value basis of approximately $6.8 million associated with these warrants was recorded as an offset to additional paid-in capital (see Note 4).

Pursuant to the down round adjustment feature of the January 2018 warrants, the exercise price of these warrants was adjusted to the $1.20 offering price per share in the February 2019 financing transaction, and to the $0.405 offering price in the December 2019 financing transaction, and it resulted in recording a deemed dividend of $122,000.

On March 19, 2019, the Company received net cash proceeds of approximately $7.6 million as a result of completing a registered direct offering of 5,950,000 shares at a negotiated purchase price of $1.37 per share. In addition, in a concurrent private placement, the Company issued to purchasers a warrant to purchase one share of the Company’s common stock for each share purchased for cash in the offering.  All warrants issued in this offering have an exercise price of $1.25 per share, are exercisable immediately upon issuance and expire 5.5 years following the date of issuance. The estimated aggregate grant date fair value on a relative fair value basis of approximately $6.0 million associated with these warrants was recorded as an offset to additional paid-in capital (see Note 4).

On December 11, 2019, the Company received net cash proceeds of approximately $8.9 million as a result of closing an underwritten public offering of 19,200,000 shares of common stock, pre-funded warrants to purchase 5,400,000 shares of common stock, and warrants to purchase up to an aggregate of 24,600,000 shares of common stock at a combined offering price of $0.405 per unit. The pre-funded warrants were sold at a purchase price of $0.395 per pre-funded warrant which represents the per share purchase price for the shares less the $0.01 per share exercise price for each such pre-funded warrant. Warrants sold in this offering have an exercise price of $0.405 per share, are exercisable immediately and expire five years from the date of issuance. The Company granted the underwriters an option to purchase up to 3,690,000 shares of common stock and/or common warrants to purchase up to 3,690,000 shares of common stock of which 1,925,000 warrants were issued to underwriters upon close of the transaction.  The estimated aggregate grant date fair value on a relative fair value basis of approximately $6.4 million associated with these warrants was recorded as an offset to additional paid-in capital (see Note 4). Additionally, approximately $998,000 of fees and costs directly associated with this offering were recorded as an offset to additional paid-in capital in accordance with applicable accounting guidance.

The accompanying notes are an integral part of these financial statements.

85

BIOCEPT, INC.

NOTES TO FINANCIAL STATEMENTS

1. The Company and Business Activities

The Company was founded in California in May 1997 and is an early stage molecular oncology diagnostics company that develops and commercializes proprietary circulating tumor cell, or CTC, and circulating tumor DNA, or ctDNA, assays utilizing a standard blood sample, or liquid biopsy. The Company’s current and planned assays are intended to provide information to aid healthcare providers to identify specific oncogenic alterations that may qualify a subset of cancer patients for targeted therapy at diagnosis, progression or for monitoring in order to identify specific resistance mechanisms. Sometimes traditional procedures, such as surgical tissue biopsies, result in tumor tissue that is insufficient and/or unable to provide the molecular subtype information necessary for clinical decisions. The Company’s assays, performed on blood, have the potential to provide more contemporaneous information on the characteristics of a patient’s disease when compared with tissue biopsy and radiographic imaging. Additionally, commencing in October 2017, the Company’s pathology partnership program, branded as Empower TC ^TM, provides the unique ability for pathologists to participate in the interpretation of liquid biopsy results and is available to pathology practices and hospital systems throughout the United States. Further, sales to laboratory supply distributors of the Company’s proprietary blood collection tubes commenced in June 2018, which allow for the intact transport of liquid biopsy samples for research use only, or RUO, from regions around the world.

The Company operates a clinical laboratory that is CLIA-certified (under the Clinical Laboratory Improvement Amendment of 1988) and CAP-accredited (by the College of American Pathologists), and manufactures cell enrichment and extraction microfluidic channels, related equipment and certain reagents to perform the Company’s diagnostic assays in a facility located in San Diego, California. CLIA certification and accreditation are required before any clinical laboratory may perform testing on human specimens for the purpose of obtaining information for the diagnosis, prevention, treatment of disease, or assessment of health. The assays the Company offers are classified as laboratory developed tests under the CLIA regulations.

In July 2013, the Company effected a reincorporation to Delaware by merging itself with and into Biocept, Inc., a Delaware corporation, which had been formed to be and was a wholly-owned subsidiary of the Company since July 23, 2013.

2. Liquidity and Going Concern Uncertainty

As of December 31, 2019, cash totaled $9.3 million and the Company had an accumulated deficit of $245.7 million. For the years ended December 31, 2018 and 2019, the Company incurred net losses of $24.6 million and $25.1 million, respectively, and had negative cash flows from operations of $22.4 million and $23.0 million, respectively.At December 31, 2019, the Company had aggregate net interest-bearing indebtedness of $1.7 million of which $724,000 was due within one year, in addition to approximately $2.8 million of other non-interest-bearing current liabilities.  The accompanying financial statements and notes have been prepared assuming that the Company will continue as a going concern. The accompanying financial statements and notes do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the possible inability of the Company to continue as a going concern.

While the Company is currently in the commercialization stage of operations, the Company has not yet achieved profitability and anticipates that it will continue to incur net losses and negative cash flows from operations for the foreseeable future. Historically, the Company’s principal sources of cash have included proceeds from the issuance of common and preferred stock, proceeds from the exercise of warrants to purchase common stock, proceeds from the issuance of debt, and revenues from laboratory services. The Company’s principal uses of cash have included cash used in operations, payments relating to purchases of property and equipment and repayments of borrowings. The Company expects that the principal uses of cash in the future will be for continuing operations, hiring of sales and marketing personnel and increased sales and marketing activities, funding of research and development, capital expenditures, and general working capital requirements which are expected to be consistent with prior years. The Company expects that, as revenues grow, sales and marketing and research and development expenses will continue to grow, albeit at a slower rate and, as a result, the Company will need to generate significant growth in net revenues to achieve and sustain income from operations. These factors raise substantial doubt about the Company’s ability to continue as a going concern for the one-year period following the date that these financial statements were issued.

86

On March 11, 2020 the World Health Organization declared the novel strain of coronavirus (COVID-19) a global pandemic and recommended containment and mitigation measures worldwide.  In addition, as we are located in California, we are currently under a shelter in place mandate and many of our clients worldwide are similarly impacted.  As a healthcare provider, we are allowed to remain open in compliance with the shelter in place mandate and continue to provide critical information for patients diagnosed with cancer. However, the global outbreak of the COVID-19 coronavirus continues to rapidly evolve, and the extent to which the COVID-19 coronavirus may impact our business will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the ultimate geographic spread of the disease, the duration of the outbreak, travel restrictions and social distancing in the United States and other countries, business closures or business disruptions, and the effectiveness of actions taken in the United States and other countries to contain and treat the disease.  While we are still receiving specimens from clients on a daily basis, we anticipate a potential slowdown in volume as many clinic visits are being re-scheduled and delayed.  We are continuing to vigilantly monitor the situation with our primary focus on the health and safety of our employees and clients.

In February 2020, the Company received net proceeds of approximately $2.2 million related to the February 2020 Warrant Exercise Inducement offering as well as an additional $700,000 from the underwriter exercising its overallotment warrants from the December 2019 underwritten financing transaction.  In addition, as inducement for these exercises, the Company issued 6,927,258 warrants to purchase shares of common stock at $0.3495 per share.  The warrants are exercisable on the six-month anniversary of issuance and expire in five years from the date first exercisable.

On March 2, 2020, the Company received net cash proceeds of approximately $8.5 million from a registered direct offering to certain institutional investors of 23,000,000 shares of common stock at a negotiated purchase price of $0.40 per share.

On March 4, 2020, the Company received net cash proceeds of approximately $6.1 million from a registered direct offering to certain institutional investors of 16,000,000 shares of common stock at a negotiated purchase price of $0.41 per share.

Management’s Plan to Continue as a Going Concern

In order to continue as a going concern, the Company will need, among other things, additional capital resources. Until the Company can generate significant cash from operations, including assay revenues, management’s plans to obtain such resources for the Company include proceeds from offerings of the Company’s equity securities or debt, or transactions involving product development, technology licensing or collaboration. Management can provide no assurances that any sources of a sufficient amount of financing will be available to the Company on favorable terms, if at all. After considering the factors described above and management’s plans, the Company has concluded that there is substantial doubt about the Company’s ability to continue as a going concern within one year after the date that the financial statements are issued.

3. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying financial statements and notes are prepared in accordance with accounting principles generally accepted in the United States of America, or U.S. GAAP, and are prepared on the basis that the Company will continue as a going concern (see Note 2). The accompanying financial statements and notes do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the possible inability of the Company to continue as a going concern.

On July 6, 2018, the Company’s stockholders approved, and the Company filed, an amendment to the Company’s Certificate of Amendment of Certificate of Incorporation to effect a one-for-thirty reverse stock split of the Company’s outstanding common stock. As such, all references to share and per share amounts in these financial statements and accompanying notes have been retroactively restated to reflect the one-for-thirty reverse stock split, except for the authorized number of shares of the Company’s common stock of 150,000,000 shares, which was not affected by the one-for-thirty reverse stock split.

Going Concern

The Company assesses and determines its ability to continue as a going concern in accordance with the provisions of ASC Topic 205-40, Presentation of Financial Statements—Going Concern, which requires the Company to evaluate whether there are conditions or events that raise substantial doubt about its ability to continue as a going concern within one year after the date that its annual and interim financial statements are issued (see Note 2). Certain additional financial statement disclosures

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are required if such conditions or events are identified. If and when an entity’s liquidation becomes imminent, financial statements should be prepared under the liquidation basis of accounting. Determining the extent, if any, to which conditions or events raise substantial doubt about the Company’s ability to continue as a going concern, or the extent to which mitigating plans sufficiently alleviate any such substantial doubt, as well as whether or not liquidation is imminent, requires significant judgment by management.

Use of Estimates

The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, management evaluates these estimates and judgments, including those related to accounts receivable, inventories, long-lived assets, income taxes, revenues, stock-based compensation, and the determination of the Company’s ability to continue as a going concern. The Company bases its estimates on various assumptions that it believes are reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions.

Revenue Recognition and Accounts Receivable

The Company's commercial revenues are generated from diagnostic services provided to patient’s physicians and billed to third-party insurance payers such as managed care organizations, Medicare and Medicaid and patients for any deductibles, coinsurance or copayments that may be due. Commencing on January 1, 2018, the Company recognizes revenue in accordance with ASC 606, Revenue from Contracts with Customers, or ASC 606, which requires that an entity recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted the provisions of ASC 606 using the modified retrospective application method applied to all contracts, which did not impact amounts previously reported by the Company, nor did it require a cumulative effect adjustment upon adoption, as the Company’s method of recognizing revenue under ASC 606 was analogous to the method utilized immediately prior to adoption. Accordingly, there is no need for the Company to disclose the amount by which each financial statement line item was affected as a result of applying the new standard and an explanation of significant changes.

Contracts

For its commercial revenues, while the Company markets directly to physicians, its customer is the patient. Patients do not enter into direct agreements with the Company, however, a patient’s insurance coverage requirements would dictate whether or not any portion of the cost of the tests would be patient responsibility. Accordingly, the Company establishes contracts with commercial insurers in accordance with customary business practices, as follows:

• Approval of a contract is established via the order and accession, which are submitted by the patient’s physician.

• The Company is obligated to perform its diagnostic services upon receipt of a sample from a physician, and the patient and/or applicable payer are obligated to reimburse the Company for services rendered based on the patient’s insurance benefits.

• Payment terms are a function of a patient’s existing insurance benefits, including the impact of coverage decisions with the Center of Medicare and Medicaid Services, or CMS, and applicable reimbursement contracts established between the Company and payers, unless the patient is a self-pay patient, whereby the Company bills the patient directly after the services are provided.

• Once the Company delivers a patient’s assay result to the ordering physician, the contract with a patient has commercial substance, as the Company is legally able to collect payment and bill an insurer and/or patient, regardless of payer contract status or patient insurance benefit status.

• Consideration associated with commercial revenues is considered variable and constrained until fully adjudicated, with net revenues recorded to the extent that it is probable that a significant reversal will not occur.

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The Company’s development services revenues are supported by contractual agreements and generated from assay development services provided to entities, as well as certain other diagnostic services provided to physicians, and revenues are recognized upon delivery of the performance obligations in the contract.

Performance Obligations

A performance obligation is a promise in a contract to transfer a distinct good or service, or a bundle of goods or services, to the customer. For its commercial and development services revenues, the Company’s contracts have a single performance obligation, which is satisfied upon rendering of services, which culminates in the delivery of a patient’s assay result(s) to the ordering physician or entity. The duration of time between accession receipt and delivery of a valid assay result to the ordering physician or entity is typically less than two weeks. Accordingly, the Company elected the practical expedient and therefore, does not disclose the value of unsatisfied performance obligations.

Transaction Price

The transaction price is the amount of consideration that the Company expects to collect in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties, such as sales taxes. The consideration expected from a contract with a customer may include fixed amounts, variable amounts, or both. The Company’s gross commercial revenues billed, and corresponding gross accounts receivable, are subject to estimated deductions for such allowances and reserves to arrive at reported net revenues, which relate to differences between amounts billed and corresponding amounts estimated to be subsequently collected, and is deemed to be variable although the variability is not explicitly stated in any contract. Rather, the implied variability is due to several factors, such as the payment history or lack thereof for third-party payers, reimbursement rate changes for contracted and non-contracted payers, any patient co-payments, deductibles or compliance incentives, the existence of secondary payers and claim denials. The Company estimates the amount of variable consideration using the most likely amount approach to estimating variable consideration for third-party payers, including direct patient bills, whereby the estimated reimbursement for services are established by payment histories on CPT codes for each payer, or similar payer types. When no payment history is available, the value of the account is estimated at Medicare rates, with additional other payer-specific reserves taken as appropriate. Collection periods for billings on commercial revenues range from less than 30 days to several months, depending on the contracted or non-contracted nature of the payer, among other variables. The estimates of amounts that will ultimately be realized from commercial diagnostic services for non-contracted payers require significant judgment by management.

The Company limits the amount of variable consideration included in the transaction price to the unconstrained portion of such consideration. Revenue is recognized up to the amount of variable consideration that is not subject to a significant reversal until additional information is obtained or the uncertainty associated with the additional payments or refunds is subsequently resolved. Differences between original estimates and subsequent revisions, including final settlements, represent changes in the estimate of variable consideration and are included in the period in which such revisions are made. The Company monitors its estimates of transaction price to depict conditions that exist at each reporting date. If the Company subsequently determines that it will collect more consideration than it originally estimated for a contract with a customer, it will account for the change as an increase in the estimate of the transaction price in the period identified as an increase to revenue. Similarly, if the Company subsequently determines that the amount it expects to collect from a customer is less than it originally estimated, it will generally account for the change as a decrease in the estimate of the transaction price as a decrease to revenue, provided that such downward adjustment does not result in a significant reversal of cumulative revenue recognized. Revenue recognized from changes in transaction prices was not significant during the years ended December 31, 2018 and 2019.

Allocate Transaction Price

For the Company’s commercial revenues, the entire transaction price is allocated to the single performance obligation contained in a contract with a customer. For the Company’s development services revenues, the contracted transaction price is allocated to each single performance obligation contained in a contract with a customer as performed.

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Point-in-time Recognition

The Company’s single performance obligation is satisfied at a point in time, and that point in time is defined as the date a patient’s successful assay result is delivered to the patient’s ordering physician or entity. The Company considers this date to be the time at which the patient obtains control of the promised diagnostic assay service. 

Contract Balances

The timing of revenue recognition, billings and cash collections results in accounts receivable recorded in the Company’s balance sheets. Generally, billing occurs subsequent to delivery of a patient’s test result to the ordering physician or entity, resulting in an account receivable.  

Practical Expedients

The Company does not adjust the transaction price for the effects of a significant financing component, as at contract inception, the Company expects the collection cycle to be one year or less.

The Company expenses sales commissions when incurred because the amortization period is one year or less, which are recorded within sales and marketing expenses.  

The Company incurs certain other costs that are incurred regardless of whether a contract is obtained. Such costs are primarily related to legal services and patient communications. These costs are expensed as incurred and recorded within general and administrative expenses. 

Disaggregation of Revenue and Concentration of Risk

The composition of the Company’s net revenues recognized during the years ended December 31, 2018 and 2019, disaggregated by source and nature, are as follows:

	For the year ended December 31,
	2018		2019
Net revenues from contracted payers*	$	1,348,383	$	2,071,961
Net revenues from non-contracted payers		1,693,739		3,044,249
Development services revenues		198,736		212,344
Kits and Blood Collection Tubes (BCT)		9,440		200,012
Total net revenues	$	3,250,298	$	5,528,566

*Includes Medicare and Medicare Advantage, as reimbursement amounts are fixed.

	For the year ended December 31,
	2018		2019
Net commercial revenues recognized upon delivery	$	3,042,122	$	5,116,210
Development services revenues recognized upon delivery		198,736		212,344
Kits and Blood Collection Tubes (BCT)		9,440		200,012
Total net revenues	$	3,250,298	$	5,528,566

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The composition of the Company’s gross and net revenues recognized during the years ended December 31, 2018 and 2019 is as follows:

	For the year ended December 31,
	2018			2019
Commercial revenues recognized upon delivery	$	12,495,709		$	18,895,657
Development services revenues recognized upon delivery		198,736			212,344
Kits and Blood Collection Tubes (BCT)		9,440			200,012
Total gross revenues		12,703,885			19,308,013
Provisions for contractual discounts		(3,937,993	)		(3,993,402	)
Provisions for aged non-patient receivables		(326,137	)		(922,151	)
Provisions for estimated patient receivables		(66,470	)		(7,342	)
Provisions for other payer-specific sales allowances		(5,122,987	)		(8,856,552	)
Net revenues	$	3,250,298		$	5,528,566

A summary of activity in the Company’s gross and net accounts receivable balances, as well as corresponding reserves, during the year ended December 31, 2018 and 2019 is as follows:

	Balance at			Amounts			Settlements			Balance at
	December 31,			Recognized			Upon			December 31,
	2017			Upon Delivery			Adjudication			2018
Accounts receivable, gross	$	6,937,063		$	12,835,371		$	(11,889,832	)	$	7,882,602
Reserve for contractual discounts		(1,974,849	)		(3,214,615	)		3,011,989			(2,177,475	)
Reserve for aged non-patient receivables		(452,088	)		(994,542	)		880,682			(565,948	)
Reserve for estimated patient receivables		(88,120	)		(135,955	)		208,598			(15,477	)
Reserve for other payer-specific sales allowances		(3,228,580	)		(5,239,961	)		4,919,164			(3,549,377	)
Accounts receivable, net	$	1,193,426		$	3,250,298		$	(2,869,399	)	$	1,574,325

	Balance at			Amounts			Settlements			Balance at
	December 31,			Recognized			Upon			December 31,
	2018			Upon Delivery			Adjudication			2019
Accounts receivable, gross	$	7,882,602		$	19,001,873		$	(10,030,090	)	$	16,854,385
Reserve for contractual discounts		(2,177,475	)		(12,098,297	)		10,449,272			(3,826,500	)
Reserve for aged non-patient receivables		(565,948	)		(287,832	)		(646,247	)		(1,500,027	)
Reserve for estimated patient receivables		(15,477	)		(111,572	)		121,974			(5,075	)
Reserve for other payer-specific sales allowances		(3,549,377	)		(975,606	)		(3,470,722	)		(7,995,705	)
Accounts receivable, net	$	1,574,325		$	5,528,566		$	(3,575,813	)	$	3,527,078

Cash

The Company places its cash with reputable financial institutions that are insured by the Federal Deposit Insurance Corporation, or FDIC. At times, deposits held may exceed the amount of insurance provided by the FDIC. The Company has not experienced any losses in its cash and believes they are not exposed to any significant credit risk.

Fair Value Measurements

The Company uses a three-tier fair value hierarchy to prioritize the inputs used in the Company’s fair value measurements. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets for identical assets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable;

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and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The Company believes the carrying amount of cash, accounts receivable, accounts payable and accrued expenses approximate their estimated fair values due to the short-term maturities of these financial instruments. See Note 5 for further details about the inputs and assumptions used to determine fair value measurements.

Concentration of Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of temporary cash investments.

Concentrations of credit risk with respect to revenues are primarily limited to geographies to which the Company provides a significant volume of its services, and to specific third-party payers of the Company’s services such as Medicare, insurance companies, and other third-party payers. The Company’s client base consists of a large number of geographically dispersed clients diversified across various customer types.

The Company's third-party payers that represent more than 10% of total net revenues in any period presented, as well as their related net revenue amount as a percentage of total net revenues, during the years ended December 31, 2018 and 2019 were as follows:

	For the year ended December 31,
	2018			2019
Medicare and Medicare Advantage		39	%		38	%
Blue Cross Blue Shield		11	%		21	%
United Healthcare		17	%		8	%

The Company's third-party payers that represent more than 10% of total net accounts receivable, and their related net accounts receivable balance as a percentage of total net accounts receivable, at December 31, 2018 and 2019 were as follows:

	For the year ended December 31,
	2018			2019
Blue Cross Blue Shield		22	%		26	%
Medicare and Medicare Advantage		17	%		17	%
United Healthcare		15	%		12	%

The Company operates in one reportable business segment and historically has derived most revenues only from within the United States.

Certain components used in the Company’s current or planned products are currently sourced from one supplier, for which alternative suppliers exist but the Company has not validated the product(s) of such alternative supplier(s), and substitutes for these components may not be obtained easily or may require substantial design or manufacturing modifications.

Inventories

Inventories are valued at the lower of cost or net realizable value. Cost is determined by the average cost method. The Company records adjustments to its inventory for estimated obsolescence or diminution in net realizable value equal to the difference between the cost of the inventory and the estimated net realizable value. At the point of loss recognition, a new cost basis for that inventory is established, and subsequent changes in facts and circumstances do not result in the restoration or increase in that newly established cost basis. In addition, the Company records a liability for firm, non-cancelable, and unconditional purchase commitments with contract manufacturers and suppliers for quantities in excess of the Company’s future demand forecasts consistent with its valuation of excess and obsolete inventory.

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Fixed Assets

Fixed assets consist of machinery and equipment, furniture and fixtures, computer equipment and software, leasehold improvements, financed equipment and construction in-process. Fixed assets are stated at cost less accumulated depreciation and amortization. Additions, improvements, and major renewals are capitalized. Maintenance, repairs, and minor renewals are expensed as incurred. Depreciation and amortization are recorded using the straight-line method over the estimated useful lives of the assets, which range from three to seven years. Leasehold improvements are amortized over the life of the lease or the asset, whichever is shorter. Depreciation and amortization expense for the years ended December 31, 2018 and 2019 was approximately $801,000 and $932,000, respectively.

Upon sale or disposal of fixed assets, the accounts are relieved of the cost and the related accumulated depreciation or amortization with any gain or loss recorded to the statement of operations and comprehensive loss.

Fixed assets are reviewed for impairment whenever changes in circumstances indicate that the carrying amount of an asset may not be recoverable. These computations utilize judgments and assumptions inherent in the estimates of future cash flows to determine recoverability of these assets. If the assumptions about these assets were to change as a result of events or circumstances, the Company may be required to record an impairment loss. There had been no impairment losses recorded in 2018 and 2019.

Stock-based Compensation

The Company measures and recognizes compensation expense for all stock-based awards made to employees and directors based on their grant date fair values. The Company estimates the fair value of stock option awards on the date of grant using the Black-Scholes option pricing model, while the fair value of restricted stock unit awards, or RSUs, is determined by the Company’s stock price on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods using the straight-line method. In addition, the Company estimates forfeitures at the time of grant and revises these estimates in subsequent periods if actual forfeitures differ from those estimates (see Note 10).

The Company determines the fair value of the stock-based compensation awards granted as either the fair value of the consideration received, or the fair value of the equity instruments issued, whichever is more reliably measurable. All issuances of equity instruments issued to non-employees as consideration for goods or services received by the Company are accounted for based on the fair value of the equity instruments issued. These awards are recorded in expense and additional paid-in capital in shareholders’ equity over the applicable service periods based on the fair value of the options at the end of each period.

Calculating the fair value of stock-based awards requires the input of highly subjective assumptions into the Black-Scholes valuation model. Stock-based compensation expense is calculated using the Company’s best estimates, which involves inherent uncertainties, and the application of management’s judgment. Significant estimates include the expected life of the stock option, stock price volatility and risk-free interest rate.

Research and Development

Research and development costs are expensed as incurred. The amounts expensed in the years ended December 31, 2018 and 2019 were approximately $4,469,000 and $4,697,000, respectively, which includes salaries of research and development personnel.

Income Taxes

The Company provides for income taxes utilizing the liability method. Under the liability method, current income tax expense or benefit is the amount of income taxes expected to be payable or refundable for the current year. A deferred income tax asset or liability is computed for the expected future impact of differences between the financial reporting and tax bases of assets and liabilities and for the expected future tax benefit to be derived from tax credits. Tax rate changes are reflected in the computation of the income tax provision during the period such changes are enacted.

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Deferred tax assets are reduced by a valuation allowance when, in management’s opinion, it is more likely than not that some portion or all of the deferred tax assets will not be realized. The Company considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. The Company’s valuation allowance is based on available evidence, including its current year operating loss, evaluation of positive and negative evidence with respect to certain specific deferred tax assets including evaluation sources of future taxable income to support the realization of the deferred tax assets. The Company has established a full valuation allowance on the deferred tax assets as of December 31, 2018 and 2019, and therefore has not recognized any income tax benefit or expense in the periods presented.

A tax benefit from uncertain tax positions may be recognized by the Company when it is more-likely-than-not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, based on the technical merits of the position. Income tax positions must meet a more-likely-than-not recognition threshold to be recognized.

The Company recognizes interest and/or penalties related to income tax matters in income tax expense. There is no accrual for interest or penalties for income taxes on the balance sheets at December 31, 2018 and 2019, and the Company has not recognized interest and/or penalties in the statements of operations and comprehensive loss for the years ended December 31, 2018 and 2019.

Recent Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board, or FASB, issued authoritative guidance, which changes several aspects of the accounting for leases, including the requirement that all leases with durations greater than twelve months be recognized on the balance sheet. The guidance is effective for annual and interim reporting periods in fiscal years beginning after December 15, 2018. Effective January 1, 2019, the Company adopted the guidance and elected the optional transition method to account for the impact of the adoption with a cumulative-effect adjustment in the period of adoption and did not restate prior periods. The Company also elected the practical expedient package as permitted under the transition guidance. As of January 1, 2019, the Company recorded a right-of-use assets and liabilities upon adoption of the guidance (See Note 7).

In August 2017, the FASB issued authoritative guidance that expands and refines hedge accounting for both nonfinancial and financial risk components and align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. This guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early application is permitted. The Company adopted this guidance for the fiscal year beginning on January 1, 2019 and determined that the adoption of this guidance does not have a material impact on its financial statements or disclosures because the Company does not currently hold any financial instruments accounted for as a hedging activity.

In February 2018, the FASB issued authoritative guidance allowing a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from legislation enacted in 2017, informally titled the Tax Cuts and Jobs Act of 2017. These amendments eliminate the stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017. However, because these amendments only relate to the reclassification of the income tax effects of the Tax Cuts and Jobs Act of 2017, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. This guidance also requires certain disclosures about stranded tax effects. This guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company adopted this guidance for the fiscal year beginning on January 1, 2019 which did not have a material impact on its financial statements or disclosures because the Company does not currently maintain any stranded tax effects in accumulated other comprehensive income.

In June 2018, the FASB issued authoritative guidance simplifying the accounting for nonemployee stock-based compensation and largely aligning such compensation with the accounting requirements for employee stock-based awards. For public companies, this guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. The Company adopted this guidance for the fiscal year beginning on January 1, 2019 and determined that the adoption of this guidance does not have a material impact on its financial statements or disclosures.

In November 2018, the FASB issued authoritative guidance clarifying the interaction between Collaborative Arrangements (Topic 808) and Revenue from Contracts with Customers (Topic 606) to address diversity in practice related to how

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companies account for collaborative arrangements. For public companies, this guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year. Early adoption is permitted, but no earlier than an entity’s adoption date of Revenue from Contracts with Customers (Topic 606).   The Company currently intends to adopt this guidance upon the effective date and does not anticipate that the adoption of this guidance will have a material impact on its financial statements or disclosures.

4. Sales of Equity Securities

On January 30, 2018, the Company received net cash proceeds of approximately $13.3 million as a result of the closing of a follow-on public offering of 1,095,153 shares of its common stock and warrants to purchase up to an aggregate of 1,095,153 shares of its common stock at a combined offering price of $13.50 per unit with $1.4 million of costs directly associated with the offering recorded as an offset to additional paid-in capital under applicable accounting guidance. At December 31, 2019 all warrants sold in this offering have an exercise price of $0.405 per share, which is subject to down round adjustment,are exercisable immediately and expire five years from the date issuance. The aggregate estimated grant date fair value of $9.7 million was recorded as an offset to additional paid-in capital upon the closing of this offering.

In May 2018, the SEC declared effective a shelf registration statement filed by the Company, which expires in May 2021. The shelf registration statement allows the Company to issue any combination of our common stock, preferred stock, debt securities and warrants from time to time for an aggregate initial offering price of up to $50 million, subject to certain limitations for so long as our public float is less than $75 million.

On August 13, 2018, the Company completed a rights offering. Pursuant to the rights offering, the Company sold an aggregate of 11,587 units consisting of an aggregate of 11,587 shares of Series A Preferred Stock and 2,549,140 warrants, with each warrant exercisable for one share of our common stock at an exercise price of $4.53 per share, resulting in net proceeds to the Company of approximately $10.1 million, after deducting expenses relating to the rights offering, including dealer-manager fees and expenses, and excluding any proceeds received upon exercise of any warrants. Each share of Series A Preferred Stock will be convertible, at the Company’s option at any time on or after the first anniversary of the closing of the Rights Offering or at the option of the holder at any time, into the number of shares of the Company’s common stock, par value $0.0001 per share determined by dividing the $1,000 stated value per share of the Series A Preferred Stock by a conversion price of $4.53 per share. In addition, the conversion price per share is subject to adjustment for stock dividends, distributions, subdivisions, combinations or reclassifications.  Holders of Series A Preferred Stock shall be entitled to receive dividends (on an as-if-converted-to-common-stock basis) in the same form as dividends actually paid on shares of the Common Stock when, as and if such dividends are paid on shares of Common Stock. The Series A Preferred Stock have no voting rights. Upon the Company’s liquidation, dissolution or winding-up, whether voluntary or involuntary, holders of Series A Preferred Stock will be entitled to receive out of the assets, whether capital or surplus, of the Company the same amount that a holder of Common Stock would receive if the Series A Preferred Stock were fully converted (disregarding for such purpose any conversion limitations thereunder) to Common Stock, which amounts shall be paid pari passu with all holders of Common Stock. The Company is not obligated to redeem or repurchase any shares of Series A Preferred Stock.

On September 20, 2018, the Company completed an offering of 642,438 shares of the Company’s common stock and prefunded warrants to purchase up to an aggregate of 120,000 shares of its common stock. The shares were sold at a purchase price of $3.285 per share and the pre-funded warrants were sold at a purchase price of $3.275 per pre-funded warrant which represents the per share purchase price for the shares less the $0.01 per share exercise price for each such pre-funded warrant. The net proceeds to the Company from this offering were approximately $2.2 million, after deducting expenses related to the offering including dealer-manager fees and expenses, and excluding any proceeds received upon exercise of any warrants. In addition, in a concurrent private placement, the Company issued to purchasers a warrant to purchase one share of the Company’s common stock for each share and pre-funded warrant purchased for cash in the offering. All warrants issued in this offering have an exercise price of $3.16 per share, are exercisable upon the six-month anniversary of issuance and expire five years from such date.

On January 18, 2019, the Company completed an offering of 990,000 shares of the Company’s common stock. The shares were sold at a purchase price of $2.25 per share and the net proceeds to the Company from this offering were approximately $2.0 million, after deducting expenses related to the offering including dealer-manager fees and expenses.

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On February 12, 2019, the Company received net cash proceeds of approximately $6.6 million as a result of the closing of a follow-on public offering of 6,250,000 shares of its common stock and warrants to purchase up to an aggregate of 6,250,000 shares of its common stock at a combined offering price of $1.20 per unit. All warrants sold in this offering have an exercise price of $1.20 per share, are exercisable immediately and expire five years from the date of issuance. In addition, the Company sold warrants to purchase up to an aggregate of 937,500 shares of the Company’s common stock in connection with the partial exercise of the over-allotment option granted to the underwriters. Upon closing of the transaction, warrants to purchase 915,000 shares were issued pursuant to the placement agents’ partial exercise of their overallotment. Subsequent to the closing of this offering, no additional cash proceeds have been received from the exercise of warrants sold in this offering.  On March 11, 2019, the underwriters exercised their overallotment option for 538,867 shares of the Company’s common stock related to the February 12, 2019 follow-on offering, purchasing shares at $1.20 per share for net cash proceeds of approximately $592,000.

On March 19, 2019, the Company received net cash proceeds of approximately $7.6 million as a result of completing a registered direct offering of 5,950,000 shares at a negotiated purchase price of $1.37 per share. In addition, in a concurrent private placement, the Company issued to purchasers a warrant to purchase one share of the Company’s common stock for each share purchased for cash in the offering.  All warrants issued in this offering have an exercise price of $1.25 per share, are exercisable immediately upon issuance and expire 5.5 years following the date of issuance.

In May 2019, the Company received cash proceeds of approximately $2.5 million from the exercise of 2,086,479 February 2019 warrants at $1.20 per share.

On May 28, 2019, the Company entered into Warrant Exercise Agreements, or the Exercise Agreements, with certain of the holders of its existing warrants, or the Exercising Holders. Pursuant to the Exercise Agreements, the Exercising Holders and the Company agreed that, subject to any applicable beneficial ownership limitations, the Exercising Holders would cash exercise up to 20% of their Existing Warrants, or the Investor Warrants, into shares of common stock underlying such Existing Warrants, or the Exercised Shares. In order to induce the Exercising Holders to cash exercise the Investor Warrants, the Exercise Agreements provided for the issuance of new warrants, or the New Warrants, with such New Warrants to be issued in an amount equal to 75% of the number of Exercised Shares underlying any Investor Warrants that was cash exercised by July 15, 2019. The New Warrants were exercisable upon issuance and terminate on the date that is five-years and six-months following the initial exercise date. The New Warrants have an exercise price per share of $1.31.  A total of 2,062,966 Investor Warrants were exercised contemporaneously with the execution of the Exercise Agreements resulting in total proceeds to the Company of $2.3 million, net of investment banking fees. The warrants issued in connection with the Exercise Agreement were considered inducement warrants and are classified in equity. The fair value of the warrants issued was approximately $1.8 million and the fair value of the inducement warrants was expensed as warrant inducement expense in the accompanying statement of operations for the year ended December 31, 2019.   

On July 15, 2019, the Company entered into amendments (the “Amendments”) to the Exercise Agreements.  Pursuant to the Amendments, the period during which the Exercising Holders may elect to exercise for cash the Existing Warrants in exchange for new warrants to purchase common stock to be issued in an amount equal to 75% of the number of shares of common stock exercised under the Existing Warrants was extended from July 15, 2019 to July 31, 2019.  There were no additional warrants exercised under the Amendments during the remainder of 2019.

In December 2019, the Company received net cash proceeds from an underwritten offering of approximately $8.9 million from the issuance of 19,200,000 shares of common stock, pre-funded warrants to purchase 5,400,000 shares of common stock, and warrants to purchase an aggregate of 24,600,000 shares of common stock.  Each share was sold together with a common warrant to purchase one share of common stock at a combined price of $0.405 per share of common stock and accompanying warrant. Each pre-funded warrant was sold together with a common warrant to purchase one share of common stock at a combined price of $0.395 per pre-funded warrant and accompanying warrant.  Each prefunded warrant had an exercise price of $0.01 per share and was exercisable immediately upon issuance and expired when exercised in full.  In addition, underwriters were granted an option to purchase up to an additional 3,690,000 shares of common stock and/or common warrants.  Common warrants issued in this offering have an exercise price of $0.405 per share, are exercisable immediately upon issuance and expire 5 years following the date of issuance. In addition, the common warrants have a cashless exercise provision, pursuant to which holders can exercise the warrant without cash payment for 50% of the number of shares of common stock that would issuable upon exercise of the common warrant if such exercise were by means of a

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cash exercise rather than a cashless exercise.  Pursuant to the cashless exercise provision in the common warrants, 14.2 million common warrants were exercised for 7.1 million shares of common stock as of December 31, 2019.

Pursuant to the down round adjustment feature of the January 2018 warrants, the exercise price of these warrants was adjusted to the $1.20 price per share offering price in the February 2019 financing transaction, and to the $0.405 offering price in the December 2019 financing transaction.

5. Fair Value Measurements

The estimated nonrecurring fair value measurements associated with fixed asset purchases recorded as right-of-use asset finance lease obligations totaling approximately  $632,000 during the year ended December 31, 2019, were calculated as the present value of the lease payments based on contractual payment amounts and estimated market rates.  Upon adoption of guidance in ASC Topic 842 Leases, the estimated fair value of the right-of-use operating lease asset was recorded based on the present value of future lease payments based on contractual payment amounts and estimated market rates in effect.

Other Fair Value Measurement

As of the closing of the Company’s January 30, 2018 offering, the grant date fair value of the warrants issued to purchase up to 1,095,153 shares of common stock was estimated to be approximately $8.82 per share, or a total of approximately $9.7 million was recorded as an offset to additional paid-in capital on a relative fair value basis. The warrants sold in this offering currently have an exercise price of $0.405 per share, which is subject to down round adjustment, and expire five years from the date of issuance. The fair value of the warrants was estimated using a Monte Carlo simulation valuation model using Geometric Brownian Motion, incorporating anticipated future financing events, with the following assumptions:

Beginning stock price	$	10.17
Exercise price	$	15.00
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.48	%
Expected life (in years)		5.00
Expected volatility		99.00	%

As of the closing of the Company’s August 13, 2018 rights offering, the grant date fair value of the warrants issued to purchase up to 2,549,140 shares of common stock was estimated to be approximately $3.30 per share, or a total of approximately $8.4 million, was recorded as an offset to additional paid-in capital on a relative fair value basis. The warrants sold in this offering have an exercise price of $4.53 per share and expire five years from the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model, incorporating the following assumptions:

Beginning stock price	$	3.89
Exercise price	$	4.53
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.75	%
Expected life (in years)		5.00
Expected volatility		128.69	%

As of the closing of the Company’s September 20, 2018 offering, the grant date fair value of the warrants issued to purchase up to 762,438 shares of common stock was estimated to be approximately $2.57 per share, or a total of approximately $2.0 million was recorded as an offset to additional paid-in capital on a relative fair value basis. The warrants sold in this offering have an exercise price of $3.16 per share, and expire five years from the initial exercise date, which is the six-month anniversary of the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model, incorporating the following assumptions:

Beginning stock price	$	2.92
Exercise price	$	3.16
Expected dividend yield		0.00	%

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Discount rate-bond equivalent yield	2.77	%
Expected life (in years)	5.50
Expected volatility	130.7	%

Also, included in the September 20, 2018 offering the Company issued 120,000 pre-funded warrants.  The pre-funded warrants had an intrinsic value of $350,000, were subsequently fully exercised and are no longer outstanding as of December 31, 2019.

As of the closing of the Company’s February 12, 2019 offering, the estimated grant date fair value of approximately $0.95 per share associated with the warrants to purchase up to 7,165,000 shares of common stock issued in this offering, or a total of approximately $6.8 million, was recorded as an offset to additional paid-in capital on a relative fair value basis. All warrants sold in this offering have an exercise price of $1.20 per share, are exercisable immediately and expire five years from the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model with the following assumptions:

Beginning stock price	$	1.05
Exercise price	$	1.20
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.49	%
Expected life (in years)		5.00
Expected volatility		147.7	%

As of the closing of the Company’s March 19, 2019 offering, the estimated grant date fair value of approximately $1.01 per share associated with the warrants to purchase up to 5,950,000 shares of common stock issued in this offering, or a total of approximately $6.0 million, was recorded as an offset to additional paid-in capital on a relative fair value basis. All warrants sold in this offering have an exercise price of $1.25 per share, are exercisable immediately and expire 5.5 years from the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model with the following assumptions:

Beginning stock price	$	1.12
Exercise price	$	1.25
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.44	%
Expected life (in years)		5.50
Expected volatility		140.0	%

As of the closing of the Company’s May 30, 2019 warrant inducement transaction, the estimated grant date fair value of approximately $1.18 per share associated with the warrants to purchase up to 1,547,226 shares of common stock issued in this offering, or a total of approximately $1.8 million, was recorded as a warrant inducement expense with an offset to additional paid-in capital. All warrants issued in this warrant inducement transaction have an exercise price of $1.31 per share, are exercisable immediately and expire 5.5 years from the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model with the following assumptions:

Beginning stock price	$	1.29
Exercise price	$	1.31
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.05	%
Expected life (in years)		5.50
Expected volatility		145.9	%

As of the closing of the Company’s December 11, 2019 offering, the grant date fair value of the warrants issued to purchase up to 26,527,500 shares of common stock were estimated to be approximately $0.24 per share, or a total of approximately $6.4 million, was recorded as an offset to additional paid-in capital on a relative fair value basis. The warrants sold in this

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offering are exercisable immediately, have an exercise price of $0.405 per share and expire five years from the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model, incorporating the following assumptions:

Beginning stock price	$	0.27
Exercise price	$	0.405
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		1.64	%
Expected life (in years)		5.00
Expected volatility		153.7	%

Also, included in the December 11, 2019 offering the Company issued 5,400,000 pre-funded warrants.  The pre-funded warrants had an intrinsic value of $1.4 million, were subsequently fully exercised and are no longer outstanding as of December 31, 2019.

6. Balance Sheet Details

The following provides certain balance sheet details:

	December 31,			December 31,
	2018			2019
Fixed Assets
Machinery and equipment	$	2,818,583		$	2,857,538
Furniture and office equipment		157,391			156,987
Computer equipment and software		1,437,408			1,552,891
Leasehold improvements		570,173			570,173
Financed equipment		2,573,955			—
Construction in process		116,640			625,038
		7,674,150			5,762,627
Less accumulated depreciation and amortization		(4,934,728	)		(4,258,297	)
Total fixed assets, net	$	2,739,422		$	1,504,330
Accrued Liabilities
Accrued payroll	$	255,426		$	298,855
Accrued vacation		535,682			622,792
Accrued bonuses		712,574			748,742
Accrued sales commissions		62,767			89,562
Current portion of deferred rent		158,342			—
Accrued other		203,602			220,253
Total accrued liabilities	$	1,928,393		$	1,980,204

7. April 2014 Credit Facility

On April 30, 2014, the Company received net cash proceeds of approximately $4,898,000 pursuant to the execution of the April 2014 Credit Facility. Upon the entry into the April 2014 Credit Facility, the Company was required to pay the lender a facility fee of $50,000 in conjunction with the funding of the term loan. The April 2014 Credit Facility was secured by substantially all of the Company’s personal property other than its intellectual property. The term loan under the April 2014 Credit Facility bore interest at an annual rate of 7.95%. The Company was required to make interest-only payments on the term loan through August 1, 2015. The outstanding term loan under the April 2014 Credit Facility began amortizing at the end of the applicable interest-only period, with monthly payments of principal and interest being made by the Company to the lender in consecutive monthly installments following such interest-only period. The term loan under the April 2014 Credit Facility matured on July 1, 2018. Under the original terms of the underlying agreement, the Company was also

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required to make a final payment to the lender equal to 5.5% of the original principal amount of the term loan funded. Upon maturity and final payoff of the April 2014 Credit Facility on July 1, 2018, security interest in the Company’s personal property was released by the lender.

A warrant to purchase up to 588 shares of the Company’s common stock at an exercise price of $424.80 per share with a term of 10 years was issued to Oxford Finance LLC on April 30, 2014. Issuance costs of approximately $102,000 associated with the term loan under the April 2014 Credit Facility were recorded as a discount to outstanding debt as of the closing date, resulting in net proceeds of approximately $4,898,000. The estimated fair value of the warrant issued of approximately $233,000 was also recorded as a discount to outstanding debt as of the closing date. The discounts and other issuance costs are amortized to interest expense utilizing the effective interest method over the underlying term of the loan.

8. Leases

Effective January 1, 2019, the Company adopted US GAAP accounting rules in ASC Topic 842, Leases (ASC 842), using the modified retrospective method.  The Company elected to follow the package of practical expedients provided under the transition guidance within ASC 842, and accordingly, did not reassess whether any expired or existing contracts are or contain leases, did not reassess expired or existing leases, and did not reassess initial direct costs for any existing leases.  Upon adoption, the Company recorded an operating lease right-of-use asset and an operating lease liability on the balance sheet.  In addition, assets under equipment leases previously classified as capital leases within Property, Plant and Equipment on the Company’s balance sheet were reclassified to finance lease right-of-use assets upon adoption of the guidance.  Right-of-use assets and obligations were recognized based on the present value of remaining lease payments over the lease term.  As the Company’s operating lease does not provide an implicit rate, an estimated incremental borrowing rate was used based on the information available at the adoption date in determining the present value of lease payments.  Operating lease expense is recognized on a straight-line basis over the lease term.  Variable lease costs such as common area costs and other operating costs are expensed as incurred.  Leases with an initial term of 12 months or less are not recorded on the balance sheet.  

Finance Leases

The Company leases certain laboratory equipment under arrangements previously accounted for as capital leases, classified on the Company’s balance sheet as fixed assets and related lease liabilities and depreciated on a straight-line basis over the lease term. Upon adoption of ASC 842, leased equipment previously classified as fixed assets totaling $1.4 million in net book value were reclassified to lease right-of-use assets in accordance with the guidance.  The equipment under finance leases is depreciated on a straight-line basis over periods ranging from 5 to 7 years. The total gross value of equipment capitalized under such lease financing arrangements was approximately $2,574,000 and $3,125,000 at December 31, 2018 and 2019, respectively. Total accumulated depreciation related to equipment under finance leases was approximately $1,135,000 and $1,606,000 at December 31, 2018 and 2019, respectively, and total depreciation expense was approximately $376,000 and $454,000, at December 31, 2018 and 2019, respectively. Fixed asset purchases totaling approximately $279,000 and $633,000 during the years ended December 31, 2018 and 2019, respectively, were recorded as finance leases.

On January 31, 2019, the Company executed a finance lease commitment with a third-party lender for total amount of approximately $149,000, which was funded by the lender on February 1, 2019. Under the terms of the equipment financing agreement, which was accounted for as a finance lease transaction, the principal balance plus interest for the equipment are to be repaid in full after 36 monthly installments of $5,013 totaling approximately $180,000 through February 2022.

In July 2019, a finance lease commitment was executed with a third-party lender for the total amount of approximately $100,000, which was accounted for as a finance lease transaction with the principal balance plus interest for the equipment to be repaid in full after 48 monthly installments of $2,706 totaling approximately $130,000 through May 2023.

In August 2019, a finance lease commitment was executed with a third-party lender for the total amount of approximately $245,000, which was accounted for as a finance lease transaction with the principal balance plus interest for the equipment to be repaid in full after 36 monthly installments of $8,253 totaling approximately $297,000 through August 2022.

In September 2019, a finance lease commitment was executed with a third-party lender for the total additional amount of approximately $89,000, which was accounted for as a finance lease transaction with the principal balance plus interest for the equipment to be repaid in full after 60 monthly installments of $1,770 totaling approximately $106,000 through September 2024.

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In December 2019, twofinance lease commitments were executed with third-party lenders.The first with a total principal of$28,000, 60-month term and $597 monthly payments totaling approximately $36,000 over the lease term.  The second finance lease had a total principal of $22,000, 48-month lease term and $563 monthly payments totaling approximately $27,000 over the lease term. Both of these transactions were accounted for as finance leases.

Operating Lease

The Company leases its primary laboratory and office facilities in San Diego, California.  This lease is classified as an operating lease in accordance with the ASC 842 guidance.  The average monthly cash payment for the operating lease is approximately $120,000 per month, and the lease term ends on July 31, 2020.  The Company recorded a lease right-of-use asset and lease liability of $1,930,000 and $2,201,000, respectively, as of January 1, 2019, based on the present value of payments and an incremental borrowing rate of 4.5%.

In addition, the Company reviews agreements at inception to determine if they include a lease, and when they do, uses its incremental borrowing rate or implicit interest rate to determine the present value of the future lease payments.

The following schedule sets forth the components of right-of-use lease assets as of December 31, 2018 and 2019 as follows:

	December 31,		December 31,
	2018		2019
Lease right-of-use assets:
Operating	$	—	$	729,330
Finance		—		1,606,387
Total	$	—	$	2,335,717

The following schedule sets forth the current portion of operating and finance lease liabilities as of December 31, 2018 and 2019:

	December 31,		December 31,
	2018		2019
Current  portion of lease liability:
Operating	$	—	$	842,452
Finance		—		724,329
Total	$	—	$	1,566,781

The following schedule sets forth the long-term portion of operating and finance lease liabilities as of December 31, 2018 and 2019:

	December 31,		December 31,
	2018		2019
Long-term portion of lease liability:
Operating	$	—	$	—
Finance		—		973,189
Total	$	—	$	973,189

The following schedule represents the components of lease expense for the years ended December 31, 2018 and 2019:

	For the years ended December 31,
	2018		2019
Lease cost
Finance lease cost
Amortization of right-of-use assets	$	—	$	470,486
Interest on lease liabilities		—		249,984
Operating lease cost		—		1,272,024
Total	$	—	$	1,992,494

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The following schedule sets forth the remaining future minimum lease payments outstanding under finance and operating leases, as well as corresponding remaining sales tax and maintenance obligation payments that are expensed as incurred and due within each respective year ending December 31, as well as the present value of the total amount of the remaining minimum lease payments, as of December 31, 2019:

	Finance					Operating
	Minimum			Maintenance and		Minimum
	Lease			Sales Tax Obligation		Lease
	Payments			Payments		Payments
2020	$	779,049		$	90,260	$	855,136
2021		531,846			69,053		—
2022		408,396			57,499		—
2023		284,380			58,098		—
Thereafter		69,674			9,536		—
Total payments		2,073,345			284,446		855,136
Less amount representing interest		(375,827	)		—		(12,684	)
Present value of payments	$	1,697,518		$	284,446	$	842,452

The following schedule sets forth supplemental cash flow information related to operating and finance leases as of December 31, 2019:

	For the year ended December 31, 2019
Other information
Operating cash flows from finance leases	$	249,984
Operating cash flows from operating leases	$	1,430,366
Financing cash flows from finance leases	$	539,415

The aggregate weighted average remaining lease term was 3.02 years on finance leases and 0.59 years on operating leases as of December 31, 2019.  The aggregate weighted average discount rate was 21.93% on finance leases and 4.5% on operating leases as of December 31, 2019.  

9. Supplier Financings

In 2018 and 2019, the Company obtained third-party financing for certain business insurance premiums. The 2018 and 2019 financings bore interest at rates ranging from 4.40% to 6.20% per annum, and all financings were due within one year. As of December 31, 2018 and 2019 there were no balances outstanding under this arrangement.

10. Stock-Based Compensation

Equity Incentive Plans

The Company maintains two equity incentive plans: The Amended and Restated 2013 Equity Incentive Plan, or the 2013 Plan, and the 2007 Equity Incentive Plan, or the 2007 Plan. The 2013 Plan includes a provision that shares available for grant under the Company’s 2007 Plan become available for issuance under the 2013 Plan and are no longer available for issuance under the 2007 Plan.

At the Company’s annual meeting of stockholders held on June 28, 2018, the Company’s stockholders approved amendments to the 2013 Plan, which included an increase in the number of non-inducement shares of common stock authorized for issuance under the 2013 Plan by 146,666 shares. At the Company’s annual meeting of stockholders held on June 17, 2019, the Company’s stockholders approved additional amendments to the 2013 Plan including the increase in the number of non-inducement shares of common stock authorized for issuance under the 2013 Plan by 2,800,000 shares.  As of December 31, 2019, 124,211 shares of the Company’s common stock were authorized exclusively for the issuance of stock awards to employees who have not previously been an employee or director of the Company, except following a bona fide period of

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non-employment, as an inducement material to the individual’s entering into employment with the Company, as defined under applicable Nasdaq Listing Rules.

As of December 31, 2019, under all plans, a total of 3,064,098 non-inducement shares were authorized for issuance, 2,731,962 shares had been issued with 2,615,503 non-inducement stock options and restricted stock units, or RSUs, underlying outstanding awards, and 332,136 non-inducement shares were available for grant. As of December 31, 2019, 118,368 inducement shares had been issued under the 2013 Plan, with 117,534 inducement stock options and RSUs underlying outstanding awards and 0 inducement shares available for grant.

Stock Options

Non-performance options granted under either plan vest over a maximum period of four years and expire ten years from the date of grant. Non-performance options generally vest either (i) over four years, 25% on the one-year anniversary of the date of grant and monthly thereafter for the remaining three years; or (ii) over four years, monthly vesting beginning month-one after the grant and monthly thereafter.

The fair value of stock options is determined on the date of grant using the Black-Scholes valuation model. For non-performance awards, such value is recognized as expense over the requisite service period, net of estimated forfeitures, using the straight-line method. The amount and timing of compensation expense recognized for performance awards is based on management’s estimate of the most likely outcome and when the achievement of the performance objectives is probable. The determination of the fair value of stock options is affected by the Company’s stock price, as well as assumptions regarding a number of complex and subjective variables. The volatility assumption is based on a combination of the historical volatility of the Company’s common stock and the volatilities of similar companies over a period of time equal to the expected term of the stock options. The volatilities of similar companies are used in conjunction with the Company’s historical volatility because of the lack of sufficient relevant history for the Company’s common stock equal to the expected term. The expected term of employee stock options represents the weighted-average period the stock options are expected to remain outstanding. The expected term assumption is estimated based primarily on the options’ vesting terms and remaining contractual life and employees’ expected exercise and post-vesting employment termination behavior. The risk-free interest rate assumption is based upon observed interest rates on the grant date appropriate for the term of the employee stock options. The dividend yield assumption is based on the expectation of no future dividend payouts by the Company.

The assumptions used in the Black-Scholes pricing model for options granted during the years ended December 31, 2018 and 2019 are as follows:

	2018	2019
Stock and exercise prices	$0.86 - $6.00	$0.29 - $1.03
Expected dividend yield	0.00%	0.00%
Discount rate-bond equivalent yield	2.50% - 3.02%	1.58% - 2.55%
Expected life (in years)	4.00 - 5.96	4.00 - 5.96
Expected volatility	100% - 120%	128% - 156%

Using the assumptions described above, with stock and exercise prices being equal on date of grant, the weighted-average estimated fair value of options granted in 2018 and 2019 were approximately $1.75 and $0.91 per share, respectively.

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A summary of stock option activity for the years ended December 31, 2018 and 2019 is as follows:

	Number of Shares			Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term in Years
Outstanding at December 31, 2017		81,643		$	113.68		8.80
Granted		142,587		$	2.20
Exercised		—			—
Cancelled/forfeited/expired		(28,410	)	$	57.96
Outstanding at December 31, 2018		195,820		$	41.41		9.20
Granted		2,676,229		$	0.91
Exercised		—			—
Cancelled/forfeited/expired		(140,026	)	$	3.70
Outstanding at December 31, 2019		2,732,023		$	3.66		9.25
Vested and unvested expected to vest, December 31, 2019		2,655,129		$	3.74		9.25

The intrinsic values of options outstanding, options exercisable, and options vested and unvested expected to vest at December 31, 2018 and 2019 were each zero.

Restricted Stock

The fair value of RSUs awarded under either plan is determined by the closing price of the Company’s common stock on the date of grant. For non-performance RSUs, such value is recognized as expense over the requisite service period, net of estimated forfeitures, using the straight-line method. The amount and timing of compensation expense recognized for RSUs is based on management’s estimate of the most likely outcome and when the achievement of the performance objectives is probable.

A summary of RSU activity during 2018 and 2019 is as follows:

	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2017		12,030		$	56.10
Granted		—		$	0
Vested and issued		(5,835	)	$	45.00
Forfeited		(5,835	)	$	45.00
Outstanding at December 31, 2018		360		$	415.80
Granted		—		$	—
Vested and issued		—		$	—
Forfeited		—		$	—
Outstanding at December 31, 2019		360		$	415.80
Vested, December 31, 2019		360		$	415.80

At December 31, 2019, the intrinsic values of RSUs outstanding was approximately $100. Of the 360 RSUs outstanding at December 31, 2019, all were fully vested.

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Stock-based Compensation Expense

The following table presents the effects of stock-based compensation related to equity awards to employees and nonemployees on the statement of operations during the periods presented:

	Years Ended December 31,
	2018			2019
Stock Options
Cost of revenues	$	46,708		$	77,495
Research and development expenses		133,525			127,844
General and administrative expenses		300,433			517,324
Sales and marketing expenses		78,321			146,916
Total expenses related to stock options		558,987			869,579
RSUs
Cost of revenues		(18,802	)		—
Research and development expenses		13,576			—
General and administrative expenses		54,302			—
Sales and marketing expenses		15,349			—
Total stock-based compensation	$	623,412		$	869,579

Stock-based compensation expense was recorded net of estimated forfeitures of 0% - 8% per annum during the years ended December 31, 2018 and 2019. As of December 31, 2019, total unrecognized share-based compensation expense related to unvested stock options and RSUs, adjusted for estimated forfeitures, was approximately $2,222,000, and such amount is expected to be recognized over a weighted-average period of approximately 3.11 years.

11. Common Stock Warrants Outstanding

A summary of equity-classified common stock warrant activity, for warrants other than those underlying unexercised overallotment option warrants, during 2018 and 2019 is as follows:

							Average
					Weighted		Remaining
	Number of				Average Exercise		Contractual
	Shares				Price Per Share		Term in Years
Outstanding at December 31, 2017		288,196		$		78.86		4.0
Issued		4,526,731		$		3.85
Exercised		(120,000	)	$		0.01
Expired		—		$		—
Outstanding at December 31, 2018		4,694,927		$		8.55		4.4
Issued		41,189,726		$		0.70
Exercised		(18,395,930	)	$		1.20
Expired		(4,474	)	$		953.06
Outstanding at December 31, 2019		27,484,249		$		1.86		4.6

All warrants outstanding at December 31, 2019 are exercisable and all warrants outstanding at December 31, 2018 were exercisable, except for the 762,438 warrants issued on September 24, 2018, which were first exercisable on March 24, 2019 and expire on March 24, 2024.

Warrants issued in the February 2019 financing transaction have an expiration date of February 12, 2024, warrants issued in the March 2019 transaction have an expiration date of September 19, 2024, warrants issued in the May 2019 inducement offering have an expiration date of July 10, 2025, and warrants issued in the December 2019 have an expiration date of December 11, 2024.

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Included in the September 20, 2018 financing transaction the Company issued 120,000 pre-funded warrants to investors.  These pre-funded warrants had an intrinsic value of $350,000, were subsequently fully exercised and are no longer outstanding as of December 31, 2019.  In addition, included in the December 11, 2019 financing transaction the Company issued 5,400,000 pre-funded warrants.  The pre-funded warrants had an intrinsic value of $1.4 million, were subsequently fully exercised and are no longer outstanding as of December 31, 2019.

The intrinsic value of equity-classified common stock warrants outstanding at December 31, 2018 and 2019 was zero.

On January 30, 2018, the Company issued warrants to purchase up to an aggregate of 1,095,153 shares of its common stock, which had an exercise price of $15.00 per share, subject to down round adjustment, are exercisable immediately and expire five years from the date of issuance.  As a result of the down round adjustment feature of these warrants, these warrants have a current exercise price of $0.405 per share as of December 31, 2019.  

12. Net Loss per Common Share

Basic and diluted net loss per common share is determined by dividing net loss applicable to common shareholders by the weighted-average common shares outstanding during the period. Because there is a net loss attributable to common shareholders for the years ended December 31, 2018 and 2019, the outstanding RSUs, warrants, and common stock options have been excluded from the calculation of diluted loss per common share because their effect would be anti-dilutive. Therefore, the weighted-average shares used to calculate both basic and diluted loss per share are the same.

The following potentially dilutive securities have been excluded from the computations of diluted weighted-average shares outstanding for the periods presented, as they would be anti-dilutive:

	For the years ended
	December 31,
	2018		2019
Preferred warrants outstanding (number of common stock equivalents)		17		—
Common warrants outstanding		4,694,927		27,484,249
RSUs outstanding		360		360
Convertible preferred stock outstanding (number of common stock equivalents)		976,157		471,393
Common options outstanding		195,820		2,732,023
Total anti-dilutive common share equivalents		5,867,281		30,688,025

13. 401(k) Plan

The Company sponsors a 401(k) savings plan for all eligible employees. The Company may make discretionary matching contributions to the plan to be allocated to employee accounts based upon employee deferrals and compensation. During the years ended December 31, 2018 and 2019, the Company made $215,000 and approximately $228,000, respectively, in matching contributions into the savings plan.

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14. Income Taxes

On December 22, 2017, the President of the United States signed into law legislation, informally titled the Tax Cuts and Jobs Act of 2017, that significantly revises the Internal Revenue Code of 1986, as amended, or the Code. The Act amends the Code to reduce tax rates and modify policies, credits, and deductions for individuals and businesses.For businesses, the Act reduces the corporate tax rate from a maximum of 35% to a flat 21% rate. The rate reduction was effective on January 1, 2018. As a result of the rate reduction, the Company has reduced the deferred tax asset balance as of December 31, 2017 by approximately $2.6 million. Due to the Company's full valuation allowance position, the Company has also reduced the valuation allowance by the same amount.

As of December 31, 2019, the Company completed its accounting for the tax effects of the enactment of the Tax Cuts and Jobs Act of 2017 which resulted in immaterial adjustments to provisional estimates, offset by a full valuation allowance.

For the years ended December 31, 2018 and 2019, the provision for income taxes was calculated as follows:

	For the years ended December 31,
	2018		2019
Current:
Federal	$	—	$	—
State		1,886		—
Total		1,886		—
Deferred
Federal		—		—
State		—		—
Total		—		—
Provision for income tax	$	1,886	$	—

The following table reconciles income taxes computed at the federal statutory rate and the Company’s provision for income taxes:

	For the years ended December 31,
	2018			2019
Income tax at statutory rate	$	(5,159,881	)	$	(5,278,232	)
Change in federal tax rate		—			—
State liability		(670,015	)		(764,997	)
Permanent items		118,959			103,617
Stock compensation		11,128			174,128
Warrant inducement		—			384,534
Expiration of net operating losses		—			35,487
Research and development credit		(272,314	)		(359,765	)
State rate change		(132,855	)		388
Estimated section 382 limitation		—			325,046
Return to provision		8,386			(4,296	)
Other		19,420			(83,353	)
Valuation allowance		6,079,058			5,467,443
Provision for income tax	$	1,886		$	—

Deferred income taxes are provided for temporary differences in recognizing certain income and expense items for financial and tax reporting purposes. The deferred tax assets consisted primarily of the income tax benefits from estimated net operating loss carryforwards, deferred rent, and estimated research and development credits. Valuation allowances have been recorded to fully offset deferred tax assets at December 31, 2018 and 2019, as it is more likely than not that the assets will not be utilized.

At December 31, 2019, the Company had estimated federal net operating loss carryforwards of approximately $54.9 million with $41.0 million net operating losses generated after December 31, 2017 carrying forward indefinitely and total

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estimated net operating loss carryforwards of approximately $13.9 million which will begin to expire in 2020 and may generally be used to offset up to 80% of future taxable income. The Company has additional state net operating lossesof $24.9 million, which will begin to expire in 2020.Additionally, at December 31, 2019, the Company had estimated research and development tax credits of approximately $366,000 and $3,738,000 for federal and California purposes, respectively. The estimated federal research and development tax credits will begin to expire in 2020. The California research and development tax credits do not expire.

For the taxable years ended December 31, 2018 and 2019, the Company has evaluated the various tax positions reflected in its income tax returns for both federal and state jurisdictions, to determine if the Company has any uncertain tax positions on the historical tax returns. The Company recognizes the impact of an uncertain tax position on an income tax return at the largest amount that the relevant taxing authority is more-likely-than not to sustain upon audit. The Company does not recognize uncertain income tax positions if they have less than 50 percent likelihood of being sustained. Based on this assessment, the Company believes there are no tax positions for which a liability for unrecognized tax benefits should be recorded as of December 31, 2018 or 2019. The Company is subject to U.S. federal income tax as well as income tax in multiple state jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal income tax examinations for 2015 and before, state and local income tax examinations 2014 and before. However, to the extent allowed by law, the tax authorities may have the right to examine prior periods where net operating losses were generated and carried forward and make adjustments up to the amount of the net operating loss carryforward amount. The Company’s policy is to recognize interest and penalties related to income tax matters in income tax expense. Due to the existence of the valuation allowance, future changes in unrecognized tax benefits will not impact the Company’s effective tax rate. The Company is currently not under examination by any taxing authorities and does not believe its unrecognized tax benefits will significantly change in the next twelve months.

The tax effects of carryforwards and other temporary differences that give rise to deferred tax assets consist of the following:

	For the year ended December 31,
	2018			2019
Estimated net operating loss carryforward	$	9,229,174		$	13,118,923
Estimated research and development credits		2,958,710			3,318,475
Accruals and other		2,864,028			4,536,147
Deferred rent		64,628			—
Operating lease liability		—			205,542
		15,116,540			21,179,087
Right-of-use asset		—			(569,870	)
Gross deferred tax liabilities		—			(569,870	)
Less valuation allowance		(15,116,540	)		(20,609,217	)
Net deferred tax assets	$	—		$	—

Utilization of the estimated domestic net operating loss and research and development tax credit carryforwards may be subject to a substantial annual limitation due to ownership change limitations that may have occurred or that could occur in the future, as required by Sections 382 and 383 of the Code, as well as similar state provisions. These ownership changes may limit the amount of estimated net operating loss and research and development credit carryforwards that can be utilized annually to offset future taxable income and tax, respectively. In general, an “ownership change” as defined by Section 382 of the Code results from a transaction or series of transactions over a three-year period resulting in an ownership change of more than 50 percentage points by value of the outstanding stock of a company by certain stockholders. Since the Company’s formation, the Company has raised capital through the issuance of capital stock on several occasions which on its own or combined with the purchasing stockholders’ subsequent disposition of those shares, likely resulted in such an ownership change, or could result in an ownership change in the future.

Upon the occurrence of an ownership change under Sections 382 and 383 of the Code as outlined above, utilization of the estimated net operating loss and research and development credit carryforwards are subject to an annual limitation, which is determined by first multiplying the value of the Company’s stock at the time of the ownership change by the applicable long-

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term, tax-exempt rate, which could be subject to additional adjustments, as required. Any limitation may result in expiration of a portion of the estimated net operating loss or research and development tax credit carryforwards before utilization. The Company has not yet completed an analysis to determine whether an ownership change has occurred, however, the Company believes ownership changes likely occurred in each year from 2015 through 2019. As a result, the Company has estimated that the use of its net operating loss carryforwards is limited and has disclosed in the table above only the amounts it estimates could be used in the future, which remain fully offset by a valuation allowance to reduce the net asset to zero.

15. Related Party Transactions

A member of the Company’s management is the controlling person of Aegea Biotechnologies, Inc., or Aegea. On September 2, 2012, the Company entered into an Assignment and Exclusive Cross-License Agreement, or the Cross-License Agreement, with Aegea. The Company received payments totaling approximately $19,000 and $26,000 during the years ended December 31, 2018 and 2019, respectively, from Aegea as reimbursements for shared patent costs under the Cross-License Agreement.  On December 11, 2019, the Company entered into a First Amendment to Assignment and Exclusive Cross-License Agreement with Aegea pursuant to which the Company obtained a royalty bearing license for a certain patent.  The Company agreed to pay Aegea, effective January 1, 2019, a royalty of 10% on Biocept’s sale of research use only, or RUO, and import research use only reagents and kits in the field of oncology, where the sample types are tissue, whole blood, bone marrow, cerebrospinal fluid or derivatives of any of the foregoing.  A payment of $12,000 was made in December 2019 related to this arrangement for 2019 year to date activity up to the end of the third quarter of 2019.  In addition, the Company has accrued $7,000 for royalty expenses related to this arrangement as of December 31, 2019, which was paid subsequent to year end.

16. Commitments and Contingencies

Operating Leases

The Company leases office, laboratory, and warehouse space at its San Diego, California facility under a non-cancelable operating lease. The initial lease was for an eight-year term expiring in 2012. In November 2011, the Company extended the lease term through October 31, 2018 and expanded the original premises by 9,849 square feet. Under the amended lease, the landlord delivered the expanded premises in May 2013. In September 2013, the Company extended the lease term through July 31, 2020. See Lease footnote for further detail.

Purchase Commitment

In February 2016, the Company signed a firm, non-cancelable, and unconditional commitment in an aggregate amount of $1,062,500 with a vendor to purchase certain inventory items, payable in minimum quarterly amounts of $62,500 through May 2020. At December 31, 2019, approximately $91,000 remained outstanding under this purchase commitment.

Financed Equipment Maintenance and Sales Tax Obligations

During the years ended December 31, 2018 and 2019, total expense recorded in the Company’s statement of operations and comprehensive loss for sales tax and maintenance obligations associated with finance lease arrangements was approximately $101,000 and $122,000, respectively. At December 31, 2018 and 2019, approximately $69,000 and $73,000 of such sales tax and maintenance obligations incurred but not paid were recorded in accrued other liabilities in the Company’s balance sheet (see Note 6). Future payments totaling approximately $284,000 for sales tax and maintenance obligations associated with financed equipment were due under equipment financing arrangements at December 31, 2019, which will be expensed as incurred (see Note 8).

Legal Proceedings

In the normal course of business, the Company may be involved in legal proceedings or threatened legal proceedings. The Company is not party to any legal proceedings or aware of any threatened legal proceedings which are expected to have a material adverse effect on its financial condition, results of operations or liquidity.

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17. Selected Quarterly Financial Data (Unaudited)

The following is selected quarterly financial data as of and for the periods ending:

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
December 31, 2018
Balance sheet data:
Cash	$	9,272,420		$	2,569,111		$	8,956,200		$	3,423,373
Total assets		14,747,827			8,291,310			14,551,892			8,750,303
Total non-current liabilities		1,357,193			1,258,261			1,174,397			1,098,137
Total shareholders’ equity		8,507,714			2,527,568			8,938,408			3,042,519
Statement of operations and comprehensive loss data:
Net revenues	$	806,943		$	822,238		$	761,591		$	859,526
Cost of revenues		2,434,886			2,699,671			2,481,916			2,435,262
Research and development expenses		1,070,584			1,019,285			1,089,746			1,288,957
General and administrative expenses		1,938,664			1,708,970			1,793,720			1,632,670
Sales and marketing expenses		1,636,542			1,433,174			1,404,192			1,440,798
Loss from operations		(6,273,733	)		(6,038,862	)		(6,007,983	)		(5,938,161	)
Net loss	$	(6,356,404	)	$	(6,153,101	)	$	(6,047,784	)	$	(6,014,312	)
Deemed dividend related to warrants down round provision		—			—			(636,370	)		—
Net loss attributable to common shareholders	$	(6,356,404	)	$	(6,153,101	)	$	(6,684,154	)	$	(6,014,312	)
Net loss per common share:1
Basic	$	(3.33	)	$	(2.70	)	$	(2.42	)	$	(1.43	)
Diluted	$	(3.33	)	$	(2.70	)	$	(2.42	)	$	(1.43	)
Weighted-average shares outstanding used in computing net loss per share attributable to common shareholders:
Basic		1,911,282			2,280,115			2,767,440			4,209,221
Diluted		1,911,282			2,280,115			2,759,614			4,209,221

¹ Basic and diluted net loss per common share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted net loss per common share.

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	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
December 31, 2019
Balance sheet data:
Cash	$	14,762,198		$	12,590,597		$	6,539,444		$	9,301,406
Total assets		21,891,932			19,904,840			14,520,914			17,732,644
Total non-current liabilities		1,452,244			983,419			1,032,243			973,189
Total shareholders’ equity		14,014,084			13,099,551			7,705,458			11,200,643
Statement of operations and comprehensive loss data:
Net revenues	$	1,024,239		$	1,191,323		$	1,529,262		$	1,783,742
Cost of revenues		2,599,364			2,673,323			2,832,735			2,872,098
Research and development expenses		1,223,291			1,148,280			1,163,546			1,161,905
General and administrative expenses		1,681,837			1,676,310			1,700,380			1,911,593
Sales and marketing expenses		1,374,560			1,614,732			1,462,335			1,489,216
Loss from operations		(5,854,813	)		(5,921,322	)		(5,629,734	)		(5,651,070	)
Net loss	$	(5,916,787	)	$	(7,816,012	)	$	(5,691,762	)	$	(5,713,478	)
Deemed dividend related to warrants down round provision		(99,743	)		—			—			(21,829	)
Net loss attributable to common shareholders	$	(6,016,530	)	$	(7,816,012	)	$	(5,691,762	)	$	(5,735,307	)
Net loss per common share:1
Basic	$	(0.61	)	$	(0.38	)	$	(0.25	)	$	(0.20	)
Diluted	$	(0.61	)	$	(0.38	)	$	(0.25	)	$	(0.20	)
Weighted-average shares outstanding used in computing net loss per share attributable to common shareholders:
Basic		9,792,093			20,466,224			23,018,235			29,128,632
Diluted		9,792,093			20,466,224			23,018,235			29,128,632

¹ Basic and diluted net loss per common share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted net loss per common share.

18. Subsequent Events

In February 2020, the Company received net proceeds of approximately $2.2 million related to the February 2020 Warrant Exercise Inducement offering as well as an additional $700,000 from the underwriter exercising its overallotment warrants from the December 2019 underwritten financing transaction.  In addition, as inducement for these exercises, the Company issued 6,927,258 warrants to purchase shares of common stock at $0.3495 per share.  The warrants are exercisable on the six-month anniversary of issuance and expire in five years from the date first exercisable.

On March 2, 2020, the Company received net cash proceeds of approximately $8.5 million from a registered direct offering to certain institutional investors of 23,000,000 shares of common stock at a negotiated purchase price of $0.40 per share.

On March 4, 2020, the Company received net cash proceeds of approximately $6.1 million from a registered direct offering to certain institutional investors of 16,000,000 shares of common stock at a negotiated purchase price of $0.41 per share.

On March 11, 2020 the World Health Organization declared the novel strain of coronavirus (COVID-19) a global pandemic and recommended containment and mitigation measures worldwide.  In addition, as we are located in California, we are currently under a shelter in place mandate and many of our clients worldwide are similarly impacted.  As a healthcare provider, we are allowed to remain open in compliance with the shelter in place mandate and continue to provide critical information for patients diagnosed with cancer. However, the global outbreak of the COVID-19 coronavirus continues to

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rapidly evolve, and the extent to which the COVID-19 coronavirus may impact our business will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the ultimate geographic spread of the disease, the duration of the outbreak, travel restrictions and social distancing in the United States and other countries, business closures or business disruptions, and the effectiveness of actions taken in the United States and other countries to contain and treat the disease.  While we are still receiving specimens from clients on a daily basis, we anticipate a potential slowdown in volume as many clinic visits are being re-scheduled and delayed.  We are continuing to vigilantly monitor the situation with our primary focus on the health and safety of our employees and clients.

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Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

Not applicable.

Item 9A. Controls and Procedures.

Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act) as of December 31, 2019, the end of the period covered by this report. Based on that evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that our disclosure controls and procedures were effective as of the end of such period.

Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Our management’s annual report on internal control over financial reporting is set forth below.

Management’s Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Because of its inherent limitations, internal control over financial reporting may not prevent or detect all misstatements. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation.

We conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control—Integrated Framework (2013 Framework) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on our evaluation under the framework in Internal Control—Integrated Framework, our management concluded that our internal control over financial reporting was effective as of December 31, 2019.

This annual report does not include an attestation report of our independent registered public accounting firm regarding internal control over financial reporting. Our report was not subject to attestation by our independent registered public accounting firm pursuant to the rules of the Securities and Exchange Commission that permit us to provide only management’s report in this report.

Changes in Internal Control over Financial Reporting

There has been no change in our internal controls over financial reporting during our most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal controls over financial reporting.

Item 9B. Other Information.

Not applicable.

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PART III

Item 10. Directors, Executive Officers and Corporate Governance.

The information required by this item and not set forth below will be set forth in the sections entitled “Election of Directors” and “Executive Officers” in our Proxy Statement for our 2020 Annual Meeting of Stockholders, or Proxy Statement, to be filed with the SEC within 120 days after the end of the fiscal year ended December 31, 2019, and is incorporated herein by reference.

We have adopted a code of ethics that applies to our Chief Executive Officer and other senior financial officers (our Chief Financial Officer, Controller and other senior financial officers performing similar functions), which we refer to as the Code of Business Conduct and Ethics. The Code of Business Conduct and Ethics is available on our website at www.biocept.com under the Corporate Governance section of the Investor Relations portion of the website. Our Code of Business Conduct and Ethics is designed to meet the requirements of Section 406 of Regulation S-K and the rules promulgated thereunder. We will promptly disclose on our website (i) the nature of any amendment to the Code of Business Conduct and Ethics that applies to any covered person, and (ii) the nature of any waiver, including an implicit waiver, from a provision of the Code of Business Conduct and Ethics that is granted to one of the covered persons.

Item 11. Executive Compensation.

The information required by this item will be set forth in the section entitled “Executive Compensation” in our Proxy Statement and is incorporated herein by reference.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information required by this item will be set forth in the sections entitled “Security Ownership of Certain Beneficial Owners and Management” and “Executive Compensation” in our Proxy Statement and is incorporated herein by reference.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

The information required by this item will be set forth in the section entitled “Transactions with Related Persons” in our Proxy Statement and is incorporated herein by reference.

Item 14. Principal Accounting Fees and Services.

The information required by this item will be set forth in the section entitled “Ratification of Selection of Independent Registered Public Accounting Firm” in our Proxy Statement and is incorporated herein by reference.

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PART IV

Item 15. Exhibits, Financial Statement Schedules.

(a) The following documents are filed as part of this Report:

1. Financial Statements. The following documents are included in Part II, Item 8 of this Report and are incorporated by reference herein:

	Page No.
Report of Independent Registered Public Accounting Firm	79
Balance Sheets at December 31, 2019 and 2018	80
Statements of Operations and Comprehensive Loss for the Years Ended December 31, 2019 and 2018	81
Statements of Shareholders’ Equity for the Years Ended December 31, 2019 and 2018	82
Statements of Cash Flows for the Years Ended December 31, 2019 and 2018	83
Notes to Financial Statements	86

2. Financial Statement Schedules.

3. Exhibits.

Item 16. Form 10-K Summary.

None.

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EXHIBITS

Exhibit No.	Description of Exhibit
3.1	Certificate of Amendment of Certificate of Incorporation (incorporated by reference to Exhibit 3.1.4 of the Registrant’s Current Report on Form 8-K, filed with the SEC on February 14, 2014).
3.2	Amended and Restated Bylaws (incorporated by reference to Exhibit 3.2.1 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
3.3	Certificate of Amendment of Certificate of Incorporation (incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on September 29, 2016).
3.4	Amendment to Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on September 29, 2017).
3.5	Certificate of Amendment to Certificate of Incorporation (incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on July 6, 2018).
3.6	Certificate of Designation of Preferences, Rights and Limitations of Series A Convertible Preferred Stock (incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on August 13, 2018).
4.1	Reference is made to Exhibits 3.1, 3.2, 3.3, 3.4, 3.5 and 3.6.
4.2	Specimen Common Stock certificate of Biocept, Inc. (incorporated by reference to Exhibit 4.3 of the Registrant’s Annual Report on Form 10-K, filed with the SEC on March 28, 2017).
4.3	Description of Common Stock.
4.4	Form of Warrant issued to the lenders under the Loan and Security Agreement, dated as of April 30, 2014, by and among Biocept, Inc., Oxford Finance LLC, as collateral agent, and the lenders party thereto from time to time, including Oxford Finance LLC (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on May 6, 2014).
4.5	Form of Warrant to Purchase Common Stock (incorporated by reference to Exhibit 4.5 of the Registrant’s Registration Statement on Form S-1 (File No. 333-201437), as amended, filed with the SEC on February 6, 2015).
4.6	Form of Common Stock Purchase Warrant issued to the investors under the Securities Purchase Agreement, dated April 29, 2016, by and among Biocept, Inc. and the purchasers signatory thereto (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on April 29, 2016).
4.7	Form of Warrant to Purchase Common Stock (incorporated by reference to Exhibit 4.16 of the Registrant’s Post-Effective Amendment to Registration Statement on Form S-1 (File No. 333-213111), as amended, filed with the SEC on October 14, 2016).
4.8	Form of Common Stock Purchase Warrant issued to the investors under the Securities Purchase Agreement, dated March 28, 2017, by and among Biocept, Inc. and the purchasers signatory thereto (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on March 30, 2017).
4.9	Common Stock Purchase Warrant issued by the Registrant in favor of Ally Bridge LB Healthcare Master Fund Limited under the Common Stock and Warrant Purchase Agreement dated August 9, 2017 (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on August 10, 2017).
4.10	Common Stock Purchase Warrant issued in favor of Dawson James Securities, Inc. under the Securities Purchase Agreement dated December 5, 2017 (incorporated by reference to Exhibit 4.18 of the Registrant’s Registration Statement on Form S-1 (File No. 333-221648), as amended, filed with the SEC on January 22, 2018).
4.11	Form of Warrant to Purchase Common Stock issued to the investors under the Securities Purchase Agreement, dated January 26, 2018 (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on January 30, 2018).
4.12	Warrant Agency Agreement dated August 13, 2018 by and between the Registrant and Continental Stock Transfer & Trust Company (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on August 13, 2018).

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Exhibit No.	Description of Exhibit
4.13	Form of Series A Common Stock Purchase Warrant (incorporated by reference to Exhibit 3.6 of the Registrant’s Registration Statement on Form S-1 (File No. 333-225147), as amended, filed with the SEC on July 11, 2018).
4.14	Form of Pre-Funded Warrant (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on September 24, 2018).
4.15	Form of Series A Common Stock Purchase Warrant (incorporated by reference to Exhibit 4.2 of the Registrant’s Current Report on Form 8-K, filed with the SEC on September 24, 2018).
4.16	Form of Series B Common Stock Purchase Warrant (incorporated by reference to Exhibit 4.24 of the Registrant’s Registration Statement on Form S-1 (File No. 333-228566), filed with the SEC on November 28, 2018).
4.17	Form of Pre-Funded Warrant (incorporated by reference to Exhibit 4.25 of the Registrant’s Registration Statement on Form S-1 (File No. 333-228566), filed with the SEC on November 28, 2018).
4.18	Form of Series B Common Stock Purchase Warrant(incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on March 18, 2019).
4.19	Form of Series C Common Stock Purchase Warrant (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on May 29, 2019).
4.20	Form of Common Stock Warrant (incorporated by reference to Exhibit 4.19 of the Registrant’s Registration Statement on Form S-1 (File No. 333-234459), as amended, filed with the SEC on December 6, 2019).
4.21	Form of Pre-Funded Warrant (incorporated by reference to Exhibit 4.20 of the Registrant’s Registration Statement on Form S-1 (File No. 333-228566), as amended, filed with the SEC on November 8, 2019).
4.22	Form of Common Stock Warrant (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on December 11, 2019).
4.23	Form of Warrant Amendment (incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on January 9, 2020).
4.24	Form of Common Stock Purchase Warrant (incorporated by reference to Exhibit 4.2 of the Registrant’s Current Report on Form 8-K, filed with the SEC on January 9, 2020).
10.1+	2007 Equity Incentive Plan (incorporated by reference to Exhibit 10.1 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
10.2+	Form of Stock Option Grant Notice and Option Agreement under 2007 Equity Incentive Plan (incorporated by reference to Exhibit 10.1.1 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
10.3+	Form of Restricted Stock Unit Grant Notice and Restricted Stock Unit Agreement under 2007 Equity Incentive Plan (incorporated by reference to Exhibit 10.1.2 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
10.4+	Form of Indemnification Agreement between the Registrant and its officers and directors (incorporated by reference to Exhibit 10.3 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
10.5+	Form of Indemnity Agreement between Biocept, Inc., a California corporation, and its officers and directors (incorporated by reference to Exhibit 10.4 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
10.6+	Employment Agreement, between the Registrant and Michael W. Nall, effective as of August 26, 2013 (incorporated by reference to Exhibit 10.6 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
10.7+	Employment Agreement, between the Registrant and Lyle J. Arnold, dated May 2, 2011 (incorporated by reference to Exhibit 10.7 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).

117

Exhibit No.	Description of Exhibit
10.8	Lease, between the Registrant and Nexus Equity VIII LLC, dated March 31, 2004 (incorporated by reference to Exhibit 10.11 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), as amended, filed with the SEC on November 5, 2013).
10.9	First Amendment to Lease, between the Registrant and ARE-SD Region No. 18, LLC, dated November 1, 2011(incorporated by reference to Exhibit 10.11.1 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
10.10	Second Amendment to Lease, between the Registrant and ARE-SD Region No. 18, LLC, dated September 10, 2012 (incorporated by reference to Exhibit 10.11.2 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
10.11	Third Amendment to Lease, between the Registrant and ARE-SD Region No. 18, LLC, dated as of January 31, 2013, and effective as of January 1, 2013 (incorporated by reference to Exhibit 10.11.4 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
10.12	Fourth Amendment to Lease, between the Registrant and ARE-SD Region No. 18, LLC, dated as of September 10, 2013, and effective as of August 1, 2013 (incorporated by reference to Exhibit 10.11.5 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), filed with the SEC on September 23, 2013).
10.13	Assignment and Exclusive Cross-License Agreement between the Registrant and Aegea Biotechnologies, Inc. dated June 2, 2012 (incorporated by reference to Exhibit 10.22 of the Registrant’s Registration Statement on Form S-1 (File No. 333-191323), as amended, filed with the SEC on January 30, 2014).
10.14+	2014 Annual Incentive Plan (incorporated by reference to Exhibit 10.2 to the Registrant’s Quarterly Report on Form 10-Q, filed with the SEC on August 8, 2014).
10.15+	First Amendment to Employment Agreement by and between the Registrant and Michael W. Nall, dated November 6, 2015 (incorporated by reference to Exhibit 10.4 to the Registrant’s Quarterly Report on Form 10-Q, filed with the SEC on November 9, 2015).
10.16+	Employment Agreement between the Registrant and Timothy Kennedy, dated July 25, 2016 (incorporated by reference to Exhibit 99.2 to the Registrant’s Current Report on Form 8-K, filed with the SEC on July 27, 2016).
10.17+	Second Amendment to Employment Agreement by and between the Registrant and Michael W. Nall dated November 1, 2017 (incorporated by reference to Exhibit 10.22 of the Registrant’s Registration Statement on Form S-1 (File no. 333-221648), as amended, filed with the SEC on January 22, 2018).
10.18+	Biocept, Inc. Amended and Restated 2013 Equity Incentive Plan, Form of Stock Option Grant Notice, Option Agreement, Form of Restricted Stock Unit Grant Notice and Restricted Stock Unit agreement for use thereunder (incorporated by reference to Exhibit 99.1 of the Registrant’s Registration Statement on Form S-8, filed with the SEC on October 19, 2018).
10.19	Form of Securities Purchase Agreement by and between the Registrant and the purchasers party thereto, dated January 18, 2019 (incorporated by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on January 18, 2019).
10.20	Placement Agency Agreement by and among the Registrant and Maxim Group LLC and Dawson James Securities, Inc., dated January 18, 2019 (incorporated by reference to Exhibit 10.2 of the Registrant’s Current Report on Form 8-K, filed with the SEC on January 18, 2019).
10.21	Form of Securities Purchase Agreement  (incorporated by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on March 18, 2019).
10.22	Form of Warrant Exercise Agreement, dated May 28, 2019, by and between the Registrant and certain holders of warrants to purchase shares of the Registrant’s common stock (incorporated by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on May 29, 2019).
10.23	Form of Amendment to Warrant Exercise Agreement, dated July 15, 2019, by and between the Registrant and certain holders of warrants to purchase shares of the Registrant’s common stock (incorporated by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on July 18, 2019).

118

Exhibit No.	Description of Exhibit
10.24+	Amended and Restated 2013 Equity Incentive Plan, as amended, Form of Stock Option Grant Notice, Option Agreement, Form of Restricted Stock Unit Grant Notice and Restricted Stock Unit Agreement for use thereunder (incorporated by reference to Exhibit 99.1 of the Registrant’s Current Report on Form 8-K, filed with the SEC on June 19, 2019).
23.1	Consent of Mayer Hoffman McCann P.C.
31.1	Certification of Michael Nall, Chief Executive Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Timothy Kennedy, Chief Financial Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1*	Certification of Michael Nall, Chief Executive Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2*	Certification of Timothy Kennedy, Chief Financial Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

+ Indicates management contract or compensatory plan.

* This certification is not deemed “filed” for purposes of Section 18 of the Securities Exchange Act, or otherwise subject to the liability of that section. Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent that the registrant specifically incorporates it by reference.

119

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	BIOCEPT, INC.
Date: March 27, 2020	By:	/s/ Michael W. Nall
		Michael W. Nall
		Chief Executive Officer and President

KNOW ALL BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Michael W. Nall and Timothy C. Kennedy, and each and either of them, his or her true and lawful agent, proxy and attorney-in-fact, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any amendments to this Annual Report on Form 10-K and to file the same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming all that each of said attorneys-in-fact or their substitute or substitutes may do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following persons in the capacities and on the dates indicated.

Signature	Title	Date
/s/ Michael W. Nall	Chief Executive Officer, President and Director	March 27, 2020
Michael W. Nall	(Principal Executive Officer)
/s/ Timothy C. Kennedy	Chief Financial Officer, Senior Vice President of Operations	March 27, 2020
Timothy C. Kennedy	(Principal Financial Officer and Principal Accounting Officer)
/s/ David F. Hale	Chairman and Director	March 27, 2020
David F. Hale
/s/ Marsha A. Chandler	Director	March 27, 2020
Marsha A. Chandler
/s/ Bruce E. Gerhardt	Director	March 27, 2020
Bruce E. Gerhardt
/s/ Bruce A. Huebner	Director	March 27, 2020
Bruce A. Huebner
/s/ Ivor Royston	Director	March 27, 2020
Ivor Royston
/s/ M. Faye Wilson	Director	March 27, 2020
M. Faye Wilson

120

EX-4.3

Exhibit 4.3

DESCRIPTION OF COMMON STOCK

General

The following description summarizes the material terms of our common stock. Because it is only a summary, it does not contain all the information that may be important to you. For a complete description of the matters set forth in this “Description of Common Stock,” you should refer to our amended and restated certificate of incorporation, as amended (the “Restated Certificate”), and amended and restated bylaws, as amended (the “Restated Bylaws”), which are included as exhibits to our Annual Report on Form 10-K, and to the applicable provisions of Delaware law. Our authorized capital stock consists of 150,000,000 shares of common stock, par value $0.0001 per share, and 5,000,000 shares of preferred stock, par value $0.0001 per share. Our board of directors has the authority, without stockholder approval, except as required by the listing standards of The Nasdaq Stock Market LLC, to issue additional shares of our capital stock.  In addition, our board of directors has the authority, without further action by our stockholders, to designate the rights, preferences, privileges, qualifications and restrictions of our preferred stock in one or more series.

Voting Rights

Holders of our common stock are entitled to one vote per share in the election of directors and on all other matters on which stockholders are entitled or permitted to vote. Holders of our common stock are not entitled to cumulative voting rights.

Dividend Rights

Subject to the terms of any then outstanding series of preferred stock, the holders of our common stock are entitled to dividends in the amounts and at times as may be declared by our board of directors out of funds legally available therefor.

Liquidation Rights

Upon liquidation or dissolution, holders of our common stock are entitled to share ratably in all net assets available for distribution to stockholders after we have paid, or provided for payment of, all of our debts and liabilities, and after payment of any liquidation preferences to holders of any then outstanding shares of preferred stock.

Other Matters

Holders of our common stock have no redemption, conversion or preemptive rights pursuant to the Restated Certificate or the Restated Bylaws. There are no sinking fund provisions applicable to our common stock. The rights, preferences and privileges of the holders of our common stock are subject to the rights of the holders of shares of any series of preferred stock that we may issue in the future.

Outstanding Registration Rights

Under the terms of the warrants issued to certain designees of the representative of the underwriters in connection with our initial public offering, the holders have the right to include their shares of common stock in any registration statement we file. If we register any securities for public sale, the holders will have the right to include their shares of common stock in the registration statement, provided that the underwriters of any such underwritten offering will have the right to limit the number of shares to be included in the registration statement. These piggyback registration rights expire on February 4, 2021.

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is Continental Stock Transfer & Trust Company.

Stock Exchange Listing

Our common stock is listed on The Nasdaq Capital Market under the symbol “BIOC.”

Anti-Takeover Provisions

Delaware Anti-Takeover Law

We are subject to Section 203 of the Delaware General Corporation Law (“DGCL”), which prohibits a Delaware corporation from engaging in any business combination with any interested stockholder for a period of three years after the date that such stockholder became an interested stockholder, with the following exceptions:

• before such date, the board of directors of the corporation approved either the business combination or the transaction that resulted in the stockholder becoming an interested stockholder;

• upon completion of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction began, excluding for purposes of determining the voting stock outstanding (but not the outstanding voting stock owned by the interested stockholder) those shares owned (i) by persons who are directors and also officers and (ii) employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer; or

• on or after such date, the business combination is approved by the board of directors and authorized at an annual or special meeting of the stockholders, and not by written consent, by the affirmative vote of at least 66 2/3% of the outstanding voting stock that is not owned by the interested stockholder.

In general, Section 203 defines business combination to include the following:

• any merger or consolidation involving the corporation and the interested stockholder;

• any sale, transfer, pledge or other disposition of 10% or more of the assets of the corporation involving the interested stockholder;

• subject to certain exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation to the interested stockholder;

• any transaction involving the corporation that has the effect of increasing the proportionate share of the stock or any class or series of the corporation beneficially owned by the interested stockholder; or

• the receipt by the interested stockholder of the benefit of any loss, advances, guarantees, pledges or other financial benefits by or through the corporation.

In general, Section 203 defines an “interested stockholder” as an entity or person who, together with the person’s affiliates and associates, beneficially owns, or within three years before the time of determination of interested stockholder status did own, 15% or more of the outstanding voting stock of the corporation.

Restated Certificate and Restated Bylaws Provisions

Provisions of the Restated Certificate and the Restated Bylaws may delay or discourage transactions involving an actual or potential change in our control or change in our management, including transactions in which stockholders might otherwise receive a premium for their shares or transactions that our stockholders might otherwise deem to be in their best interests. Therefore, these provisions could adversely affect the price of our common stock. Among other things, the Restated Certificate and the Restated Bylaws provide that:

• our board of directors is classified into three classes of equal (or roughly equal) size, with all directors serving for a three-year term and the directors of only one class being elected at each annual meeting of stockholders, so that the terms of the classes of directors are “staggered”;

• the authorized number of directors can be changed only by resolution of our board of directors;

• our Restated Bylaws may be amended or repealed by our board of directors or our stockholders;

• no action can be taken by stockholders except at an annual or special meeting of the stockholders called in accordance with the Restated Bylaws, and stockholders may not act by written consent, unless the stockholders amend the Restated Certificate to provide otherwise;

• stockholders may not call special meetings of the stockholders or fill vacancies on the board;

• our board of directors will be authorized to issue, without stockholder approval, preferred stock, the rights of which will be determined at the discretion of the board of directors and that, if issued, could operate as a “poison pill” to dilute the stock ownership of a potential hostile acquirer to prevent an acquisition that our board of directors does not approve;

• our stockholders do not have cumulative voting rights, and therefore our stockholders holding a majority of the shares of common stock outstanding will be able to elect all of our directors; and

• our stockholders must comply with advance notice provisions to bring business before or nominate directors for election at a stockholder meeting.

Potential Effects of Authorized but Unissued Stock

We have shares of common stock and preferred stock available for future issuance without stockholder approval. We may utilize these additional shares for a variety of corporate purposes, including future public offerings to raise additional capital, to facilitate corporate acquisitions or payment as a dividend on the capital stock.

The existence of unissued and unreserved common stock and preferred stock may enable our board of directors to issue shares to persons friendly to current management or to issue preferred stock with terms that could render more difficult or discourage a third-party attempt to obtain control of us by means of a merger, tender offer, proxy contest or otherwise, thereby protecting the continuity of our management. In addition, the board of directors has the discretion to determine designations, rights, preferences, privileges and restrictions, including voting rights, dividend rights, conversion rights, redemption privileges and liquidation preferences of each series of preferred stock, all to the fullest extent permissible under the DGCL and subject to any limitations set forth in our certificate of incorporation. The purpose of authorizing the board of directors to issue preferred stock and to determine the rights and preferences applicable to such preferred stock is to eliminate delays associated with a stockholder vote on specific issuances. The issuance of preferred stock, while providing desirable flexibility in connection with possible financings, acquisitions and other corporate purposes, could have the effect of making it more difficult for a third-party to acquire, or could discourage a third-party from acquiring, a majority of our outstanding voting stock.The issuance of preferred stock could adversely affect the voting power of holders of common stock and reduce the likelihood that common stockholders will receive dividend payments and payments upon liquidation.  The issuance could also have the effect of decreasing the market price of our common stock.

Choice of Forum

Our Restated Bylaws provide that,unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware (or, if the Court of Chancery does not have jurisdiction, another state court located within the State of Delaware or, if no state court located within the State of Delaware has jurisdiction, the federal district court for the District of Delaware) shall, to the fullest extent permitted by law, be the sole and exclusive forum for (a) any derivative action or proceeding brought on our behalf, (b) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers or other employees to us or our stockholders, (c)

any action asserting a claim arising pursuant to any provision of the DGCL, the Restated Certificate or the Restated Bylaws, or (d) any action asserting a claim governed by the internal affairs doctrine, in all cases to the fullest extent permitted by law and subject to the court’s having personal jurisdiction over the indispensable parties named as defendants. This choice of forum provision does not apply to suits brought to enforce a duty or liability created by the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, or any other claim for which the federal courts have exclusive jurisdiction.

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

As independent registered public accountants, we hereby consent to the incorporation by reference in Registration Statement Nos. 333-194930, 333-202656, 333-206347, 333-212960, 333-218018, 333-227267, 333-227900 and 333-233285 on Forms S-8, Registration Statement Nos. 333-224946 and 333-220048 on Forms S-3, and Registration Statement Nos. 333-234459, 333-230797, 333-228566, 333-227908 on Forms S-1 of our report dated March 27, 2020, relating to the financial statements of Biocept, Inc. (“Company”) (which includes explanatory paragraphs related to the change in the method of accounting for leases, and the uncertainty of the Company’s ability to continue as a going concern), included in this Annual Report on Form 10-K for the year ended December 31, 2019.

/s/ Mayer Hoffman McCann P.C.

San Diego, California

March 27, 2020

EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, Michael W. Nall, certify that:

1. I have reviewed this Annual Report on Form 10-K of Biocept, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: March 27, 2020

/s/ Michael W. Nall 

Michael W. Nall

Chief Executive Officer, President and Director

(Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, Timothy C. Kennedy, certify that:

1. I have reviewed this Annual Report on Form 10-K of Biocept, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: March 27, 2020

/s/ Timothy C. Kennedy 

Timothy C. Kennedy

Chief Financial Officer, Senior Vice President of Operations

(Principal Financial and Accounting Officer)

EX-32.1

EXHIBIT 32.1

CERTIFICATION

I, Michael W. Nall, hereby certify pursuant to Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350, that, to my knowledge, the Annual Report on Form 10-K of Biocept, Inc. for the fiscal year ended December 31, 2019 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Biocept, Inc.

Date: March 27, 2020	/s/ Michael W. Nall
	Michael W. Nall
	Chief Executive Officer, President and Director (Principal Executive Officer)

This certification accompanies the Report pursuant to Rule 13a-14(b) or Rule 15d-14(b) under the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350 and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934.

EX-32.2

EXHIBIT 32.2

CERTIFICATION

I, Timothy C. Kennedy, hereby certify pursuant to Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350, that, to my knowledge, the Annual Report on Form 10-K of Biocept, Inc. for the fiscal year ended December 31, 2019 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Biocept, Inc.

Date: March 27, 2020	/s/ Timothy C. Kennedy
	Timothy C. Kennedy
	Chief Financial Officer, Senior Vice President of Operations
	(Principal Financial and Accounting Officer)

This certification accompanies the Report pursuant to Rule 13a-14(b) or Rule 15d-14(b) under the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350 and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934.

XML

Stock-Based Compensation - Effects of Stock-Based Compensation Related to Equity Awards to Employees and Nonemployees on Statement of Operations (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation	$ 869,579	$ 558,987
Stock Options [Member] | Cost of revenues [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation	77,495	46,708
Stock Options [Member] | Research and Development Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation	127,844	133,525
Stock Options [Member] | General and Administrative Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation	517,324	300,433
Stock Options [Member] | Sales and Marketing Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation	146,916	78,321
RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation	$ 869,579	623,412
RSUs [Member] | Cost of revenues [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation		(18,802)
RSUs [Member] | Research and Development Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation		13,576
RSUs [Member] | General and Administrative Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation		54,302
RSUs [Member] | Sales and Marketing Expenses [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation		$ 15,349

XML

401(k) Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Postemployment Benefits [Abstract]
Employer's matching contributions to 401(k) plan	$ 228,000	$ 215,000

XML

Income Taxes - Summary of Deferred Tax Assets (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Estimated net operating loss carryforward	$ 13,118,923	$ 9,229,174
Estimated research and development credits	3,318,475	2,958,710
Accruals and other	4,536,147	2,864,028
Deferred rent		64,628
Operating lease liability	205,542
Gross deferred tax assets	21,179,087	15,116,540
Right-of-use asset	(569,870)
Gross deferred tax liabilities	(569,870)
Less valuation allowance	$ (20,609,217)	$ (15,116,540)

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April 2014 Credit Facility - Additional Information (Detail) - USD ($)									12 Months Ended
	Dec. 11, 2019	May 30, 2019	Mar. 19, 2019	Feb. 12, 2019	Sep. 20, 2018	Aug. 13, 2018	Jan. 30, 2018	Apr. 30, 2014	Dec. 31, 2019	Dec. 31, 2014	Feb. 28, 2019
Line of Credit Facility [Line Items]
Warrant issued to lender	1,925,000
Exercise price of unregistered warrants			$ 1.25	$ 1.20		$ 4.53	$ 1.20		$ 0.405		$ 1.20
Issuance of unregistered warrants to purchase shares of common stock, grant date fair value	$ 6,400,000	$ 1,800,000	$ 6,000,000	$ 6,800,000	$ 2,000,000	$ 8,400,000	$ 9,700,000		$ 9,700,000
Oxford Finance LLC [Member] | Common Stock [Member]
Line of Credit Facility [Line Items]
Warrant issued to lender								588
Exercise price of unregistered warrants								$ 424.80
Warrant term								10 years
Oxford Finance LLC [Member] | First Term Loan [Member]
Line of Credit Facility [Line Items]
Net cash proceeds on term loan								$ 4,898,000
Line of Credit Facility fees amount payable								$ 50,000
Line of Credit Facility, interest rate during period								7.95%
Percentage of final interest payment due at maturity								5.50%
Line of credit facility, maturity and final payoff date								Jul. 01, 2018
Issuance costs										$ 102,000
Net proceeds from credit facility										4,898,000
Issuance of unregistered warrants to purchase shares of common stock, grant date fair value										$ 233,000

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Sales of Equity Securities - Additional Information (Detail) - USD ($)												1 Months Ended		12 Months Ended
	Dec. 11, 2019	Jul. 15, 2019	May 30, 2019	May 28, 2019	Mar. 19, 2019	Mar. 11, 2019	Feb. 12, 2019	Jan. 18, 2019	Sep. 20, 2018	Aug. 13, 2018	Jan. 30, 2018	May 31, 2019	May 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Feb. 28, 2019
Class Of Stock [Line Items]
Net cash proceeds from sale of securities					$ 7,600,000			$ 2,000,000
Issuance of warrants to purchase shares of common stock	1,925,000
Stock price					$ 1.37			$ 2.25	$ 3.285
Exercise price of warrants					$ 1.25		$ 1.20			$ 4.53	$ 1.20			$ 0.405		$ 1.20
Class of warrant or rights, term					5 years 6 months					5 years				5 years
Issuance of warrants to purchase shares of common stock, grant date fair value	$ 6,400,000		$ 1,800,000		$ 6,000,000		$ 6,800,000		$ 2,000,000	$ 8,400,000	$ 9,700,000			$ 9,700,000
Aggregate units sold under right offering										11,587
Shares issued in offering					5,950,000			990,000
Warrant exercisable for share of common stock					1					1
Series A Preferred Stock convertible to common stock, conversion price										$ 4.53
Net proceeds from issuance of units, net of issuance expenses									$ 2,200,000	$ 10,100,000
Common stock, par value										$ 0.0001				$ 0.0001	$ 0.0001
Public offering, number of common stock and warrants issued									642,438
Proceeds from exercise of common stock warrants														$ 2,513,173	$ 1,200
Pre-funded Warrants [Member]
Class Of Stock [Line Items]
Issuance of warrants to purchase shares of common stock	5,400,000								120,000
Exercise price of warrants									$ 3.275
Change in exercise price of warrants									$ 0.01
Investor Warrants [Member]
Class Of Stock [Line Items]
Exercise price of warrants				$ 1.31
Proceeds from exercise of common stock warrants				$ 2,300,000
Number of warrant exercised				2,062,966										0
Cash exercise of warrants description				In order to induce the Exercising Holders to cash exercise the Investor Warrants, the Exercise Agreements provided for the issuance of new warrants, or the New Warrants, with such New Warrants to be issued in an amount equal to 75% of the number of Exercised Shares underlying any Investor Warrants that was cash exercised by July 15, 2019. The New Warrants were exercisable upon issuance and terminate on the date that is five-years and six-months following the initial exercise date.
Fair value of warrants issued				$ 1,800,000
Percentage of common stock exercised for exchange of new warrants		75.00%
Warrants exercisable date		Jul. 31, 2019		Jul. 15, 2019
Warrant [Member]
Class Of Stock [Line Items]
Exercise price of warrants											$ 15.00
Class of warrant or rights, term											5 years
Aggregate warrants sold under right offering										2,549,140
Proceeds from exercise of common stock warrants												$ 2,500,000
Number of warrant exercised												2,086,479
Warrants exercisable date														Mar. 24, 2019
Series A Preferred Stock [Member]
Class Of Stock [Line Items]
Shares issued in offering										11,587
Preferred stock stated value per share										$ 1,000
Maximum [Member] | Pre-funded Warrants [Member]
Class Of Stock [Line Items]
Issuance of warrants to purchase shares of common stock									120,000
Maximum [Member] | Investor Warrants [Member]
Class Of Stock [Line Items]
Warrants exercisable percentage				20.00%
Maximum [Member] | Warrant [Member]
Class Of Stock [Line Items]
Issuance of warrants to purchase shares of common stock											1,095,153
Follow-on Public Offering [Member]
Class Of Stock [Line Items]
Net cash proceeds from sale of securities						$ 592,000	$ 6,600,000				$ 13,300,000
Private offering, number of common stock and warrants issued							6,250,000				1,095,153
Stock price						$ 1.20	$ 1.20				$ 13.50
Cost directly associated with offering											$ 1,400,000
Exercise price of warrants	$ 0.405				$ 1.25		$ 1.20		$ 3.16	$ 4.53	$ 0.405			$ 0.405
Class of warrant or rights, term	5 years				5 years 6 months		5 years		5 years	5 years	5 years			5 years
Issuance of warrants to purchase shares of common stock, grant date fair value											$ 9,700,000
Shares issued in offering							6,250,000
Public offering, number of common stock and warrants issued											1,095,153
Proceeds from exercise of common stock warrants							$ 0
Purchase of common stock by underwriters to cover overallotments, number of shares						538,867
Follow-on Public Offering [Member] | Maximum [Member]
Class Of Stock [Line Items]
Issuance of warrants to purchase shares of common stock							6,250,000				1,095,153
Shelf Registration Statement [Member]
Class Of Stock [Line Items]
Shelf registration statement expiration period													May 31, 2021
Minimum public float limit for offering													$ 75,000,000
Shelf Registration Statement [Member] | Maximum [Member]
Class Of Stock [Line Items]
Aggregate offering price													$ 50,000,000
Private Placement [Member]
Class Of Stock [Line Items]
Exercise price of warrants									$ 3.16
Class of warrant or rights, term									5 years
Warrant exercisable for share of common stock									1
Over-allotment Option [Member] | Warrant [Member]
Class Of Stock [Line Items]
Shares issued in offering							915,000
Over-allotment Option [Member] | Maximum [Member]
Class Of Stock [Line Items]
Issuance of warrants to purchase shares of common stock							937,500
Shares issued in offering	3,690,000
Over-allotment Option [Member] | Maximum [Member] | Warrant [Member]
Class Of Stock [Line Items]
Shares issued in offering	3,690,000
Underwritten Public Offering [Member]
Class Of Stock [Line Items]
Net cash proceeds from sale of securities	$ 8,900,000
Issuance of warrants to purchase shares of common stock	24,600,000
Stock price	$ 0.405
Exercise price of warrants	$ 0.405
Class of warrant or rights, term	5 years
Shares issued in offering	19,200,000
Warrant exercisable for share of common stock	1
Underwritten Public Offering [Member] | Pre-funded Warrants [Member]
Class Of Stock [Line Items]
Issuance of warrants to purchase shares of common stock	5,400,000
Exercise price of warrants	$ 0.395
Warrant exercisable for share of common stock	1
Change in exercise price of warrants	$ 0.01
Underwritten Public Offering [Member] | Cashless Warrants [Member]
Class Of Stock [Line Items]
Issuance of warrants to purchase shares of common stock														7,100,000
Percentage of common stock issuable upon exercise of the common warrant without cash payment	50.00%
Number of common warrants exercised														14,200,000

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Related Party Transactions

12 Months Ended

Dec. 31, 2019

Related Party Transactions [Abstract]

Related Party Transactions

15. Related Party Transactions

A member of the Company’s management is the controlling person of Aegea Biotechnologies, Inc., or Aegea. On September 2, 2012, the Company entered into an Assignment and Exclusive Cross-License Agreement, or the Cross-License Agreement, with Aegea. The Company received payments totaling approximately $19,000 and $26,000 during the years ended December 31, 2018 and 2019, respectively, from Aegea as reimbursements for shared patent costs under the Cross-License Agreement.  On December 11, 2019, the Company entered into a First Amendment to Assignment and Exclusive Cross-License Agreement with Aegea pursuant to which the Company obtained a royalty bearing license for a certain patent.  The Company agreed to pay Aegea, effective January 1, 2019, a royalty of 10% on Biocept’s sale of research use only, or RUO, and import research use only reagents and kits in the field of oncology, where the sample types are tissue, whole blood, bone marrow, cerebrospinal fluid or derivatives of any of the foregoing.  A payment of $12,000 was made in December 2019 related to this arrangement for 2019 year to date activity up to the end of the third quarter of 2019.  In addition, the Company has accrued $7,000 for royalty expenses related to this arrangement as of December 31, 2019, which was paid subsequent to year end.

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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2019

The Company and Business Activities

1. The Company and Business Activities

The Company was founded in California in May 1997 and is an early stage molecular oncology diagnostics company that develops and commercializes proprietary circulating tumor cell, or CTC, and circulating tumor DNA, or ctDNA, assays utilizing a standard blood sample, or liquid biopsy. The Company’s current and planned assays are intended to provide information to aid healthcare providers to identify specific oncogenic alterations that may qualify a subset of cancer patients for targeted therapy at diagnosis, progression or for monitoring in order to identify specific resistance mechanisms. Sometimes traditional procedures, such as surgical tissue biopsies, result in tumor tissue that is insufficient and/or unable to provide the molecular subtype information necessary for clinical decisions. The Company’s assays, performed on blood, have the potential to provide more contemporaneous information on the characteristics of a patient’s disease when compared with tissue biopsy and radiographic imaging. Additionally, commencing in October 2017, the Company’s pathology partnership program, branded as Empower TC ^TM, provides the unique ability for pathologists to participate in the interpretation of liquid biopsy results and is available to pathology practices and hospital systems throughout the United States. Further, sales to laboratory supply distributors of the Company’s proprietary blood collection tubes commenced in June 2018, which allow for the intact transport of liquid biopsy samples for research use only, or RUO, from regions around the world.

The Company operates a clinical laboratory that is CLIA-certified (under the Clinical Laboratory Improvement Amendment of 1988) and CAP-accredited (by the College of American Pathologists), and manufactures cell enrichment and extraction microfluidic channels, related equipment and certain reagents to perform the Company’s diagnostic assays in a facility located in San Diego, California. CLIA certification and accreditation are required before any clinical laboratory may perform testing on human specimens for the purpose of obtaining information for the diagnosis, prevention, treatment of disease, or assessment of health. The assays the Company offers are classified as laboratory developed tests under the CLIA regulations.

In July 2013, the Company effected a reincorporation to Delaware by merging itself with and into Biocept, Inc., a Delaware corporation, which had been formed to be and was a wholly-owned subsidiary of the Company since July 23, 2013.

Basis of Presentation

Basis of Presentation

The accompanying financial statements and notes are prepared in accordance with accounting principles generally accepted in the United States of America, or U.S. GAAP, and are prepared on the basis that the Company will continue as a going concern (see Note 2). The accompanying financial statements and notes do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the possible inability of the Company to continue as a going concern.

On July 6, 2018, the Company’s stockholders approved, and the Company filed, an amendment to the Company’s Certificate of Amendment of Certificate of Incorporation to effect a one-for-thirty reverse stock split of the Company’s outstanding common stock. As such, all references to share and per share amounts in these financial statements and accompanying notes have been retroactively restated to reflect the one-for-thirty reverse stock split, except for the authorized number of shares of the Company’s common stock of 150,000,000 shares, which was not affected by the one-for-thirty reverse stock split.

Going Concern

Going Concern

The Company assesses and determines its ability to continue as a going concern in accordance with the provisions of ASC Topic 205-40, Presentation of Financial Statements—Going Concern, which requires the Company to evaluate whether there are conditions or events that raise substantial doubt about its ability to continue as a going concern within one year after the date that its annual and interim financial statements are issued (see Note 2). Certain additional financial statement disclosures are required if such conditions or events are identified. If and when an entity’s liquidation becomes imminent, financial statements should be prepared under the liquidation basis of accounting. Determining the extent, if any, to which conditions or events raise substantial doubt about the Company’s ability to continue as a going concern, or the extent to which mitigating plans sufficiently alleviate any such substantial doubt, as well as whether or not liquidation is imminent, requires significant judgment by management.

Use of Estimates

Use of Estimates

The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, management evaluates these estimates and judgments, including those related to accounts receivable, inventories, long-lived assets, income taxes, revenues, stock-based compensation, and the determination of the Company’s ability to continue as a going concern. The Company bases its estimates on various assumptions that it believes are reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions.

Revenue Recognition and Accounts Receivable

Revenue Recognition and Accounts Receivable

The Company's commercial revenues are generated from diagnostic services provided to patient’s physicians and billed to third-party insurance payers such as managed care organizations, Medicare and Medicaid and patients for any deductibles, coinsurance or copayments that may be due. Commencing on January 1, 2018, the Company recognizes revenue in accordance with ASC 606, Revenue from Contracts with Customers, or ASC 606, which requires that an entity recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted the provisions of ASC 606 using the modified retrospective application method applied to all contracts, which did not impact amounts previously reported by the Company, nor did it require a cumulative effect adjustment upon adoption, as the Company’s method of recognizing revenue under ASC 606 was analogous to the method utilized immediately prior to adoption. Accordingly, there is no need for the Company to disclose the amount by which each financial statement line item was affected as a result of applying the new standard and an explanation of significant changes.

Contracts

For its commercial revenues, while the Company markets directly to physicians, its customer is the patient. Patients do not enter into direct agreements with the Company, however, a patient’s insurance coverage requirements would dictate whether or not any portion of the cost of the tests would be patient responsibility. Accordingly, the Company establishes contracts with commercial insurers in accordance with customary business practices, as follows:

• Approval of a contract is established via the order and accession, which are submitted by the patient’s physician.

• The Company is obligated to perform its diagnostic services upon receipt of a sample from a physician, and the patient and/or applicable payer are obligated to reimburse the Company for services rendered based on the patient’s insurance benefits.

• Payment terms are a function of a patient’s existing insurance benefits, including the impact of coverage decisions with the Center of Medicare and Medicaid Services, or CMS, and applicable reimbursement contracts established between the Company and payers, unless the patient is a self-pay patient, whereby the Company bills the patient directly after the services are provided.

• Once the Company delivers a patient’s assay result to the ordering physician, the contract with a patient has commercial substance, as the Company is legally able to collect payment and bill an insurer and/or patient, regardless of payer contract status or patient insurance benefit status.

• Consideration associated with commercial revenues is considered variable and constrained until fully adjudicated, with net revenues recorded to the extent that it is probable that a significant reversal will not occur.

The Company’s development services revenues are supported by contractual agreements and generated from assay development services provided to entities, as well as certain other diagnostic services provided to physicians, and revenues are recognized upon delivery of the performance obligations in the contract.

Performance Obligations

A performance obligation is a promise in a contract to transfer a distinct good or service, or a bundle of goods or services, to the customer. For its commercial and development services revenues, the Company’s contracts have a single performance obligation, which is satisfied upon rendering of services, which culminates in the delivery of a patient’s assay result(s) to the ordering physician or entity. The duration of time between accession receipt and delivery of a valid assay result to the ordering physician or entity is typically less than two weeks. Accordingly, the Company elected the practical expedient and therefore, does not disclose the value of unsatisfied performance obligations.

Transaction Price

The transaction price is the amount of consideration that the Company expects to collect in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties, such as sales taxes. The consideration expected from a contract with a customer may include fixed amounts, variable amounts, or both. The Company’s gross commercial revenues billed, and corresponding gross accounts receivable, are subject to estimated deductions for such allowances and reserves to arrive at reported net revenues, which relate to differences between amounts billed and corresponding amounts estimated to be subsequently collected, and is deemed to be variable although the variability is not explicitly stated in any contract. Rather, the implied variability is due to several factors, such as the payment history or lack thereof for third-party payers, reimbursement rate changes for contracted and non-contracted payers, any patient co-payments, deductibles or compliance incentives, the existence of secondary payers and claim denials. The Company estimates the amount of variable consideration using the most likely amount approach to estimating variable consideration for third-party payers, including direct patient bills, whereby the estimated reimbursement for services are established by payment histories on CPT codes for each payer, or similar payer types. When no payment history is available, the value of the account is estimated at Medicare rates, with additional other payer-specific reserves taken as appropriate. Collection periods for billings on commercial revenues range from less than 30 days to several months, depending on the contracted or non-contracted nature of the payer, among other variables. The estimates of amounts that will ultimately be realized from commercial diagnostic services for non-contracted payers require significant judgment by management.

The Company limits the amount of variable consideration included in the transaction price to the unconstrained portion of such consideration. Revenue is recognized up to the amount of variable consideration that is not subject to a significant reversal until additional information is obtained or the uncertainty associated with the additional payments or refunds is subsequently resolved. Differences between original estimates and subsequent revisions, including final settlements, represent changes in the estimate of variable consideration and are included in the period in which such revisions are made. The Company monitors its estimates of transaction price to depict conditions that exist at each reporting date. If the Company subsequently determines that it will collect more consideration than it originally estimated for a contract with a customer, it will account for the change as an increase in the estimate of the transaction price in the period identified as an increase to revenue. Similarly, if the Company subsequently determines that the amount it expects to collect from a customer is less than it originally estimated, it will generally account for the change as a decrease in the estimate of the transaction price as a decrease to revenue, provided that such downward adjustment does not result in a significant reversal of cumulative revenue recognized. Revenue recognized from changes in transaction prices was not significant during the years ended December 31, 2018 and 2019.

Allocate Transaction Price

For the Company’s commercial revenues, the entire transaction price is allocated to the single performance obligation contained in a contract with a customer. For the Company’s development services revenues, the contracted transaction price is allocated to each single performance obligation contained in a contract with a customer as performed.

Point-in-time Recognition

The Company’s single performance obligation is satisfied at a point in time, and that point in time is defined as the date a patient’s successful assay result is delivered to the patient’s ordering physician or entity. The Company considers this date to be the time at which the patient obtains control of the promised diagnostic assay service. 

Contract Balances

The timing of revenue recognition, billings and cash collections results in accounts receivable recorded in the Company’s balance sheets. Generally, billing occurs subsequent to delivery of a patient’s test result to the ordering physician or entity, resulting in an account receivable.  

Practical Expedients

The Company does not adjust the transaction price for the effects of a significant financing component, as at contract inception, the Company expects the collection cycle to be one year or less.

The Company expenses sales commissions when incurred because the amortization period is one year or less, which are recorded within sales and marketing expenses.  

The Company incurs certain other costs that are incurred regardless of whether a contract is obtained. Such costs are primarily related to legal services and patient communications. These costs are expensed as incurred and recorded within general and administrative expenses. 

Disaggregation of Revenue and Concentration of Risk

The composition of the Company’s net revenues recognized during the years ended December 31, 2018 and 2019, disaggregated by source and nature, are as follows:

	For the year ended December 31,
	2018		2019
Net revenues from contracted payers*	$	1,348,383	$	2,071,961
Net revenues from non-contracted payers		1,693,739		3,044,249
Development services revenues		198,736		212,344
Kits and Blood Collection Tubes (BCT)		9,440		200,012
Total net revenues	$	3,250,298	$	5,528,566

*Includes Medicare and Medicare Advantage, as reimbursement amounts are fixed.

	For the year ended December 31,
	2018		2019
Net commercial revenues recognized upon delivery	$	3,042,122	$	5,116,210
Development services revenues recognized upon delivery		198,736		212,344
Kits and Blood Collection Tubes (BCT)		9,440		200,012
Total net revenues	$	3,250,298	$	5,528,566

The composition of the Company’s gross and net revenues recognized during the years ended December 31, 2018 and 2019 is as follows:

	For the year ended December 31,
	2018			2019
Commercial revenues recognized upon delivery	$	12,495,709		$	18,895,657
Development services revenues recognized upon delivery		198,736			212,344
Kits and Blood Collection Tubes (BCT)		9,440			200,012
Total gross revenues		12,703,885			19,308,013
Provisions for contractual discounts		(3,937,993	)		(3,993,402	)
Provisions for aged non-patient receivables		(326,137	)		(922,151	)
Provisions for estimated patient receivables		(66,470	)		(7,342	)
Provisions for other payer-specific sales allowances		(5,122,987	)		(8,856,552	)
Net revenues	$	3,250,298		$	5,528,566

A summary of activity in the Company’s gross and net accounts receivable balances, as well as corresponding reserves, during the year ended December 31, 2018 and 2019 is as follows:

	Balance at			Amounts			Settlements			Balance at
	December 31,			Recognized			Upon			December 31,
	2017			Upon Delivery			Adjudication			2018
Accounts receivable, gross	$	6,937,063		$	12,835,371		$	(11,889,832	)	$	7,882,602
Reserve for contractual discounts		(1,974,849	)		(3,214,615	)		3,011,989			(2,177,475	)
Reserve for aged non-patient receivables		(452,088	)		(994,542	)		880,682			(565,948	)
Reserve for estimated patient receivables		(88,120	)		(135,955	)		208,598			(15,477	)
Reserve for other payer-specific sales allowances		(3,228,580	)		(5,239,961	)		4,919,164			(3,549,377	)
Accounts receivable, net	$	1,193,426		$	3,250,298		$	(2,869,399	)	$	1,574,325

	Balance at			Amounts			Settlements			Balance at
	December 31,			Recognized			Upon			December 31,
	2018			Upon Delivery			Adjudication			2019
Accounts receivable, gross	$	7,882,602		$	19,001,873		$	(10,030,090	)	$	16,854,385
Reserve for contractual discounts		(2,177,475	)		(12,098,297	)		10,449,272			(3,826,500	)
Reserve for aged non-patient receivables		(565,948	)		(287,832	)		(646,247	)		(1,500,027	)
Reserve for estimated patient receivables		(15,477	)		(111,572	)		121,974			(5,075	)
Reserve for other payer-specific sales allowances		(3,549,377	)		(975,606	)		(3,470,722	)		(7,995,705	)
Accounts receivable, net	$	1,574,325		$	5,528,566		$	(3,575,813	)	$	3,527,078

Cash

Cash

The Company places its cash with reputable financial institutions that are insured by the Federal Deposit Insurance Corporation, or FDIC. At times, deposits held may exceed the amount of insurance provided by the FDIC. The Company has not experienced any losses in its cash and believes they are not exposed to any significant credit risk.

Fair Value Measurements

Fair Value Measurements

The Company uses a three-tier fair value hierarchy to prioritize the inputs used in the Company’s fair value measurements. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets for identical assets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The Company believes the carrying amount of cash, accounts receivable, accounts payable and accrued expenses approximate their estimated fair values due to the short-term maturities of these financial instruments. See Note 5 for further details about the inputs and assumptions used to determine fair value measurements.

Concentration of Risk

Concentration of Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of temporary cash investments.

Concentrations of credit risk with respect to revenues are primarily limited to geographies to which the Company provides a significant volume of its services, and to specific third-party payers of the Company’s services such as Medicare, insurance companies, and other third-party payers. The Company’s client base consists of a large number of geographically dispersed clients diversified across various customer types.

The Company's third-party payers that represent more than 10% of total net revenues in any period presented, as well as their related net revenue amount as a percentage of total net revenues, during the years ended December 31, 2018 and 2019 were as follows:

	For the year ended December 31,
	2018			2019
Medicare and Medicare Advantage		39	%		38	%
Blue Cross Blue Shield		11	%		21	%
United Healthcare		17	%		8	%

The Company's third-party payers that represent more than 10% of total net accounts receivable, and their related net accounts receivable balance as a percentage of total net accounts receivable, at December 31, 2018 and 2019 were as follows:

	For the year ended December 31,
	2018			2019
Blue Cross Blue Shield		22	%		26	%
Medicare and Medicare Advantage		17	%		17	%
United Healthcare		15	%		12	%

The Company operates in one reportable business segment and historically has derived most revenues only from within the United States.

Certain components used in the Company’s current or planned products are currently sourced from one supplier, for which alternative suppliers exist but the Company has not validated the product(s) of such alternative supplier(s), and substitutes for these components may not be obtained easily or may require substantial design or manufacturing modifications.

Inventories

Inventories

Inventories are valued at the lower of cost or net realizable value. Cost is determined by the average cost method. The Company records adjustments to its inventory for estimated obsolescence or diminution in net realizable value equal to the difference between the cost of the inventory and the estimated net realizable value. At the point of loss recognition, a new cost basis for that inventory is established, and subsequent changes in facts and circumstances do not result in the restoration or increase in that newly established cost basis. In addition, the Company records a liability for firm, non-cancelable, and unconditional purchase commitments with contract manufacturers and suppliers for quantities in excess of the Company’s future demand forecasts consistent with its valuation of excess and obsolete inventory.

Fixed Assets

Fixed Assets

Fixed assets consist of machinery and equipment, furniture and fixtures, computer equipment and software, leasehold improvements, financed equipment and construction in-process. Fixed assets are stated at cost less accumulated depreciation and amortization. Additions, improvements, and major renewals are capitalized. Maintenance, repairs, and minor renewals are expensed as incurred. Depreciation and amortization are recorded using the straight-line method over the estimated useful lives of the assets, which range from three to seven years. Leasehold improvements are amortized over the life of the lease or the asset, whichever is shorter. Depreciation and amortization expense for the years ended December 31, 2018 and 2019 was approximately $801,000 and $932,000, respectively.

Upon sale or disposal of fixed assets, the accounts are relieved of the cost and the related accumulated depreciation or amortization with any gain or loss recorded to the statement of operations and comprehensive loss.

Fixed assets are reviewed for impairment whenever changes in circumstances indicate that the carrying amount of an asset may not be recoverable. These computations utilize judgments and assumptions inherent in the estimates of future cash flows to determine recoverability of these assets. If the assumptions about these assets were to change as a result of events or circumstances, the Company may be required to record an impairment loss. There had been no impairment losses recorded in 2018 and 2019.

Stock-based Compensation

Stock-based Compensation

The Company measures and recognizes compensation expense for all stock-based awards made to employees and directors based on their grant date fair values. The Company estimates the fair value of stock option awards on the date of grant using the Black-Scholes option pricing model, while the fair value of restricted stock unit awards, or RSUs, is determined by the Company’s stock price on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods using the straight-line method. In addition, the Company estimates forfeitures at the time of grant and revises these estimates in subsequent periods if actual forfeitures differ from those estimates (see Note 10).

The Company determines the fair value of the stock-based compensation awards granted as either the fair value of the consideration received, or the fair value of the equity instruments issued, whichever is more reliably measurable. All issuances of equity instruments issued to non-employees as consideration for goods or services received by the Company are accounted for based on the fair value of the equity instruments issued. These awards are recorded in expense and additional paid-in capital in shareholders’ equity over the applicable service periods based on the fair value of the options at the end of each period.

Calculating the fair value of stock-based awards requires the input of highly subjective assumptions into the Black-Scholes valuation model. Stock-based compensation expense is calculated using the Company’s best estimates, which involves inherent uncertainties, and the application of management’s judgment. Significant estimates include the expected life of the stock option, stock price volatility and risk-free interest rate.

Research and Development

Research and Development

Research and development costs are expensed as incurred. The amounts expensed in the years ended December 31, 2018 and 2019 were approximately $4,469,000 and $4,697,000, respectively, which includes salaries of research and development personnel.

Income Taxes

Income Taxes

The Company provides for income taxes utilizing the liability method. Under the liability method, current income tax expense or benefit is the amount of income taxes expected to be payable or refundable for the current year. A deferred income tax asset or liability is computed for the expected future impact of differences between the financial reporting and tax bases of assets and liabilities and for the expected future tax benefit to be derived from tax credits. Tax rate changes are reflected in the computation of the income tax provision during the period such changes are enacted.

Deferred tax assets are reduced by a valuation allowance when, in management’s opinion, it is more likely than not that some portion or all of the deferred tax assets will not be realized. The Company considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. The Company’s valuation allowance is based on available evidence, including its current year operating loss, evaluation of positive and negative evidence with respect to certain specific deferred tax assets including evaluation sources of future taxable income to support the realization of the deferred tax assets. The Company has established a full valuation allowance on the deferred tax assets as of December 31, 2018 and 2019, and therefore has not recognized any income tax benefit or expense in the periods presented.

A tax benefit from uncertain tax positions may be recognized by the Company when it is more-likely-than-not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, based on the technical merits of the position. Income tax positions must meet a more-likely-than-not recognition threshold to be recognized.

The Company recognizes interest and/or penalties related to income tax matters in income tax expense. There is no accrual for interest or penalties for income taxes on the balance sheets at December 31, 2018 and 2019, and the Company has not recognized interest and/or penalties in the statements of operations and comprehensive loss for the years ended December 31, 2018 and 2019.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board, or FASB, issued authoritative guidance, which changes several aspects of the accounting for leases, including the requirement that all leases with durations greater than twelve months be recognized on the balance sheet. The guidance is effective for annual and interim reporting periods in fiscal years beginning after December 15, 2018. Effective January 1, 2019, the Company adopted the guidance and elected the optional transition method to account for the impact of the adoption with a cumulative-effect adjustment in the period of adoption and did not restate prior periods. The Company also elected the practical expedient package as permitted under the transition guidance. As of January 1, 2019, the Company recorded a right-of-use assets and liabilities upon adoption of the guidance (See Note 7).

In August 2017, the FASB issued authoritative guidance that expands and refines hedge accounting for both nonfinancial and financial risk components and align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. This guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early application is permitted. The Company adopted this guidance for the fiscal year beginning on January 1, 2019 and determined that the adoption of this guidance does not have a material impact on its financial statements or disclosures because the Company does not currently hold any financial instruments accounted for as a hedging activity.

In February 2018, the FASB issued authoritative guidance allowing a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from legislation enacted in 2017, informally titled the Tax Cuts and Jobs Act of 2017. These amendments eliminate the stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017. However, because these amendments only relate to the reclassification of the income tax effects of the Tax Cuts and Jobs Act of 2017, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. This guidance also requires certain disclosures about stranded tax effects. This guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company adopted this guidance for the fiscal year beginning on January 1, 2019 which did not have a material impact on its financial statements or disclosures because the Company does not currently maintain any stranded tax effects in accumulated other comprehensive income.

In June 2018, the FASB issued authoritative guidance simplifying the accounting for nonemployee stock-based compensation and largely aligning such compensation with the accounting requirements for employee stock-based awards. For public companies, this guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. The Company adopted this guidance for the fiscal year beginning on January 1, 2019 and determined that the adoption of this guidance does not have a material impact on its financial statements or disclosures.

In November 2018, the FASB issued authoritative guidance clarifying the interaction between Collaborative Arrangements (Topic 808) and Revenue from Contracts with Customers (Topic 606) to address diversity in practice related to how companies account for collaborative arrangements. For public companies, this guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year. Early adoption is permitted, but no earlier than an entity’s adoption date of Revenue from Contracts with Customers (Topic 606).   The Company currently intends to adopt this guidance upon the effective date and does not anticipate that the adoption of this guidance will have a material impact on its financial statements or disclosures.

Stock Options [Member]

Fair Value Measurements

The fair value of stock options is determined on the date of grant using the Black-Scholes valuation model. For non-performance awards, such value is recognized as expense over the requisite service period, net of estimated forfeitures, using the straight-line method. The amount and timing of compensation expense recognized for performance awards is based on management’s estimate of the most likely outcome and when the achievement of the performance objectives is probable. The determination of the fair value of stock options is affected by the Company’s stock price, as well as assumptions regarding a number of complex and subjective variables. The volatility assumption is based on a combination of the historical volatility of the Company’s common stock and the volatilities of similar companies over a period of time equal to the expected term of the stock options. The volatilities of similar companies are used in conjunction with the Company’s historical volatility because of the lack of sufficient relevant history for the Company’s common stock equal to the expected term. The expected term of employee stock options represents the weighted-average period the stock options are expected to remain outstanding. The expected term assumption is estimated based primarily on the options’ vesting terms and remaining contractual life and employees’ expected exercise and post-vesting employment termination behavior. The risk-free interest rate assumption is based upon observed interest rates on the grant date appropriate for the term of the employee stock options. The dividend yield assumption is based on the expectation of no future dividend payouts by the Company.

Restricted Stock [Member]

Fair Value Measurements

The fair value of RSUs awarded under either plan is determined by the closing price of the Company’s common stock on the date of grant. For non-performance RSUs, such value is recognized as expense over the requisite service period, net of estimated forfeitures, using the straight-line method. The amount and timing of compensation expense recognized for RSUs is based on management’s estimate of the most likely outcome and when the achievement of the performance objectives is probable.

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Summary of Significant Accounting Policies - Additional Information (Detail)		3 Months Ended								12 Months Ended
	Jul. 06, 2018 shares	Dec. 31, 2019 USD ($) shares	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) shares	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) Segment shares	Dec. 31, 2018 USD ($) shares
Summary Of Significant Accounting Policies [Line Items]
Stockholders equity reverse stock split ratio	0.03
Common stock, shares authorized | shares	150,000,000	150,000,000				150,000,000				150,000,000	150,000,000
Description of reverse stock split	On July 6, 2018, the Company’s stockholders approved, and the Company filed, an amendment to the Company’s Certificate of Amendment of Certificate of Incorporation to effect a one-for-thirty reverse stock split of the Company’s outstanding common stock.
Number of reportable segments | Segment										1
Number of suppliers										one supplier
Depreciation and amortization expense										$ 931,655	$ 800,905
Impairment losses										0	0
Research and development expenses		$ 1,161,905	$ 1,163,546	$ 1,148,280	$ 1,223,291	$ 1,288,957	$ 1,089,746	$ 1,019,285	$ 1,070,584	4,697,022	4,468,572
Accrual for interest or penalties for income taxes		$ 0				$ 0				0	0
Interest or penalties expense on income taxes										$ 0	$ 0
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets										3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets										7 years
ASC 606 [Member]
Summary Of Significant Accounting Policies [Line Items]
Performance obligation, description of timing										The duration of time between accession receipt and delivery of a valid assay result to the ordering physician or entity is typically less than two weeks.
Practical expedient, description										The Company does not adjust the transaction price for the effects of a significant financing component, as at contract inception, the Company expects the collection cycle to be one year or less.
ASC 606 [Member] | Maximum [Member] | Sales and Marketing Expenses [Member]
Summary Of Significant Accounting Policies [Line Items]
Amortization period											1 year

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Net Loss per Common Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Schedule of Anti-Dilutive Securities Excluded from Computations of Diluted Weighted-Average Shares

The following potentially dilutive securities have been excluded from the computations of diluted weighted-average shares outstanding for the periods presented, as they would be anti-dilutive:

	For the years ended
	December 31,
	2018		2019
Preferred warrants outstanding (number of common stock equivalents)		17		—
Common warrants outstanding		4,694,927		27,484,249
RSUs outstanding		360		360
Convertible preferred stock outstanding (number of common stock equivalents)		976,157		471,393
Common options outstanding		195,820		2,732,023
Total anti-dilutive common share equivalents		5,867,281		30,688,025

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Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

3. Summary of Significant Accounting Policies

Basis of Presentation

The accompanying financial statements and notes are prepared in accordance with accounting principles generally accepted in the United States of America, or U.S. GAAP, and are prepared on the basis that the Company will continue as a going concern (see Note 2). The accompanying financial statements and notes do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the possible inability of the Company to continue as a going concern.

On July 6, 2018, the Company’s stockholders approved, and the Company filed, an amendment to the Company’s Certificate of Amendment of Certificate of Incorporation to effect a one-for-thirty reverse stock split of the Company’s outstanding common stock. As such, all references to share and per share amounts in these financial statements and accompanying notes have been retroactively restated to reflect the one-for-thirty reverse stock split, except for the authorized number of shares of the Company’s common stock of 150,000,000 shares, which was not affected by the one-for-thirty reverse stock split.

Going Concern

The Company assesses and determines its ability to continue as a going concern in accordance with the provisions of ASC Topic 205-40, Presentation of Financial Statements—Going Concern, which requires the Company to evaluate whether there are conditions or events that raise substantial doubt about its ability to continue as a going concern within one year after the date that its annual and interim financial statements are issued (see Note 2). Certain additional financial statement disclosures are required if such conditions or events are identified. If and when an entity’s liquidation becomes imminent, financial statements should be prepared under the liquidation basis of accounting. Determining the extent, if any, to which conditions or events raise substantial doubt about the Company’s ability to continue as a going concern, or the extent to which mitigating plans sufficiently alleviate any such substantial doubt, as well as whether or not liquidation is imminent, requires significant judgment by management.

Use of Estimates

The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, management evaluates these estimates and judgments, including those related to accounts receivable, inventories, long-lived assets, income taxes, revenues, stock-based compensation, and the determination of the Company’s ability to continue as a going concern. The Company bases its estimates on various assumptions that it believes are reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions.

Revenue Recognition and Accounts Receivable

The Company's commercial revenues are generated from diagnostic services provided to patient’s physicians and billed to third-party insurance payers such as managed care organizations, Medicare and Medicaid and patients for any deductibles, coinsurance or copayments that may be due. Commencing on January 1, 2018, the Company recognizes revenue in accordance with ASC 606, Revenue from Contracts with Customers, or ASC 606, which requires that an entity recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted the provisions of ASC 606 using the modified retrospective application method applied to all contracts, which did not impact amounts previously reported by the Company, nor did it require a cumulative effect adjustment upon adoption, as the Company’s method of recognizing revenue under ASC 606 was analogous to the method utilized immediately prior to adoption. Accordingly, there is no need for the Company to disclose the amount by which each financial statement line item was affected as a result of applying the new standard and an explanation of significant changes.

Contracts

For its commercial revenues, while the Company markets directly to physicians, its customer is the patient. Patients do not enter into direct agreements with the Company, however, a patient’s insurance coverage requirements would dictate whether or not any portion of the cost of the tests would be patient responsibility. Accordingly, the Company establishes contracts with commercial insurers in accordance with customary business practices, as follows:

• Approval of a contract is established via the order and accession, which are submitted by the patient’s physician.

• The Company is obligated to perform its diagnostic services upon receipt of a sample from a physician, and the patient and/or applicable payer are obligated to reimburse the Company for services rendered based on the patient’s insurance benefits.

• Payment terms are a function of a patient’s existing insurance benefits, including the impact of coverage decisions with the Center of Medicare and Medicaid Services, or CMS, and applicable reimbursement contracts established between the Company and payers, unless the patient is a self-pay patient, whereby the Company bills the patient directly after the services are provided.

• Once the Company delivers a patient’s assay result to the ordering physician, the contract with a patient has commercial substance, as the Company is legally able to collect payment and bill an insurer and/or patient, regardless of payer contract status or patient insurance benefit status.

• Consideration associated with commercial revenues is considered variable and constrained until fully adjudicated, with net revenues recorded to the extent that it is probable that a significant reversal will not occur.

The Company’s development services revenues are supported by contractual agreements and generated from assay development services provided to entities, as well as certain other diagnostic services provided to physicians, and revenues are recognized upon delivery of the performance obligations in the contract.

Performance Obligations

A performance obligation is a promise in a contract to transfer a distinct good or service, or a bundle of goods or services, to the customer. For its commercial and development services revenues, the Company’s contracts have a single performance obligation, which is satisfied upon rendering of services, which culminates in the delivery of a patient’s assay result(s) to the ordering physician or entity. The duration of time between accession receipt and delivery of a valid assay result to the ordering physician or entity is typically less than two weeks. Accordingly, the Company elected the practical expedient and therefore, does not disclose the value of unsatisfied performance obligations.

Transaction Price

The transaction price is the amount of consideration that the Company expects to collect in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties, such as sales taxes. The consideration expected from a contract with a customer may include fixed amounts, variable amounts, or both. The Company’s gross commercial revenues billed, and corresponding gross accounts receivable, are subject to estimated deductions for such allowances and reserves to arrive at reported net revenues, which relate to differences between amounts billed and corresponding amounts estimated to be subsequently collected, and is deemed to be variable although the variability is not explicitly stated in any contract. Rather, the implied variability is due to several factors, such as the payment history or lack thereof for third-party payers, reimbursement rate changes for contracted and non-contracted payers, any patient co-payments, deductibles or compliance incentives, the existence of secondary payers and claim denials. The Company estimates the amount of variable consideration using the most likely amount approach to estimating variable consideration for third-party payers, including direct patient bills, whereby the estimated reimbursement for services are established by payment histories on CPT codes for each payer, or similar payer types. When no payment history is available, the value of the account is estimated at Medicare rates, with additional other payer-specific reserves taken as appropriate. Collection periods for billings on commercial revenues range from less than 30 days to several months, depending on the contracted or non-contracted nature of the payer, among other variables. The estimates of amounts that will ultimately be realized from commercial diagnostic services for non-contracted payers require significant judgment by management.

The Company limits the amount of variable consideration included in the transaction price to the unconstrained portion of such consideration. Revenue is recognized up to the amount of variable consideration that is not subject to a significant reversal until additional information is obtained or the uncertainty associated with the additional payments or refunds is subsequently resolved. Differences between original estimates and subsequent revisions, including final settlements, represent changes in the estimate of variable consideration and are included in the period in which such revisions are made. The Company monitors its estimates of transaction price to depict conditions that exist at each reporting date. If the Company subsequently determines that it will collect more consideration than it originally estimated for a contract with a customer, it will account for the change as an increase in the estimate of the transaction price in the period identified as an increase to revenue. Similarly, if the Company subsequently determines that the amount it expects to collect from a customer is less than it originally estimated, it will generally account for the change as a decrease in the estimate of the transaction price as a decrease to revenue, provided that such downward adjustment does not result in a significant reversal of cumulative revenue recognized. Revenue recognized from changes in transaction prices was not significant during the years ended December 31, 2018 and 2019.

Allocate Transaction Price

For the Company’s commercial revenues, the entire transaction price is allocated to the single performance obligation contained in a contract with a customer. For the Company’s development services revenues, the contracted transaction price is allocated to each single performance obligation contained in a contract with a customer as performed.

Point-in-time Recognition

The Company’s single performance obligation is satisfied at a point in time, and that point in time is defined as the date a patient’s successful assay result is delivered to the patient’s ordering physician or entity. The Company considers this date to be the time at which the patient obtains control of the promised diagnostic assay service. 

Contract Balances

The timing of revenue recognition, billings and cash collections results in accounts receivable recorded in the Company’s balance sheets. Generally, billing occurs subsequent to delivery of a patient’s test result to the ordering physician or entity, resulting in an account receivable.  

Practical Expedients

The Company does not adjust the transaction price for the effects of a significant financing component, as at contract inception, the Company expects the collection cycle to be one year or less.

The Company expenses sales commissions when incurred because the amortization period is one year or less, which are recorded within sales and marketing expenses.  

The Company incurs certain other costs that are incurred regardless of whether a contract is obtained. Such costs are primarily related to legal services and patient communications. These costs are expensed as incurred and recorded within general and administrative expenses. 

Disaggregation of Revenue and Concentration of Risk

The composition of the Company’s net revenues recognized during the years ended December 31, 2018 and 2019, disaggregated by source and nature, are as follows:

	For the year ended December 31,
	2018		2019
Net revenues from contracted payers*	$	1,348,383	$	2,071,961
Net revenues from non-contracted payers		1,693,739		3,044,249
Development services revenues		198,736		212,344
Kits and Blood Collection Tubes (BCT)		9,440		200,012
Total net revenues	$	3,250,298	$	5,528,566

*Includes Medicare and Medicare Advantage, as reimbursement amounts are fixed.

	For the year ended December 31,
	2018		2019
Net commercial revenues recognized upon delivery	$	3,042,122	$	5,116,210
Development services revenues recognized upon delivery		198,736		212,344
Kits and Blood Collection Tubes (BCT)		9,440		200,012
Total net revenues	$	3,250,298	$	5,528,566

The composition of the Company’s gross and net revenues recognized during the years ended December 31, 2018 and 2019 is as follows:

	For the year ended December 31,
	2018			2019
Commercial revenues recognized upon delivery	$	12,495,709		$	18,895,657
Development services revenues recognized upon delivery		198,736			212,344
Kits and Blood Collection Tubes (BCT)		9,440			200,012
Total gross revenues		12,703,885			19,308,013
Provisions for contractual discounts		(3,937,993	)		(3,993,402	)
Provisions for aged non-patient receivables		(326,137	)		(922,151	)
Provisions for estimated patient receivables		(66,470	)		(7,342	)
Provisions for other payer-specific sales allowances		(5,122,987	)		(8,856,552	)
Net revenues	$	3,250,298		$	5,528,566

A summary of activity in the Company’s gross and net accounts receivable balances, as well as corresponding reserves, during the year ended December 31, 2018 and 2019 is as follows:

	Balance at			Amounts			Settlements			Balance at
	December 31,			Recognized			Upon			December 31,
	2017			Upon Delivery			Adjudication			2018
Accounts receivable, gross	$	6,937,063		$	12,835,371		$	(11,889,832	)	$	7,882,602
Reserve for contractual discounts		(1,974,849	)		(3,214,615	)		3,011,989			(2,177,475	)
Reserve for aged non-patient receivables		(452,088	)		(994,542	)		880,682			(565,948	)
Reserve for estimated patient receivables		(88,120	)		(135,955	)		208,598			(15,477	)
Reserve for other payer-specific sales allowances		(3,228,580	)		(5,239,961	)		4,919,164			(3,549,377	)
Accounts receivable, net	$	1,193,426		$	3,250,298		$	(2,869,399	)	$	1,574,325

	Balance at			Amounts			Settlements			Balance at
	December 31,			Recognized			Upon			December 31,
	2018			Upon Delivery			Adjudication			2019
Accounts receivable, gross	$	7,882,602		$	19,001,873		$	(10,030,090	)	$	16,854,385
Reserve for contractual discounts		(2,177,475	)		(12,098,297	)		10,449,272			(3,826,500	)
Reserve for aged non-patient receivables		(565,948	)		(287,832	)		(646,247	)		(1,500,027	)
Reserve for estimated patient receivables		(15,477	)		(111,572	)		121,974			(5,075	)
Reserve for other payer-specific sales allowances		(3,549,377	)		(975,606	)		(3,470,722	)		(7,995,705	)
Accounts receivable, net	$	1,574,325		$	5,528,566		$	(3,575,813	)	$	3,527,078

Cash

The Company places its cash with reputable financial institutions that are insured by the Federal Deposit Insurance Corporation, or FDIC. At times, deposits held may exceed the amount of insurance provided by the FDIC. The Company has not experienced any losses in its cash and believes they are not exposed to any significant credit risk.

Fair Value Measurements

The Company uses a three-tier fair value hierarchy to prioritize the inputs used in the Company’s fair value measurements. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets for identical assets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The Company believes the carrying amount of cash, accounts receivable, accounts payable and accrued expenses approximate their estimated fair values due to the short-term maturities of these financial instruments. See Note 5 for further details about the inputs and assumptions used to determine fair value measurements.

Concentration of Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of temporary cash investments.

Concentrations of credit risk with respect to revenues are primarily limited to geographies to which the Company provides a significant volume of its services, and to specific third-party payers of the Company’s services such as Medicare, insurance companies, and other third-party payers. The Company’s client base consists of a large number of geographically dispersed clients diversified across various customer types.

The Company's third-party payers that represent more than 10% of total net revenues in any period presented, as well as their related net revenue amount as a percentage of total net revenues, during the years ended December 31, 2018 and 2019 were as follows:

	For the year ended December 31,
	2018			2019
Medicare and Medicare Advantage		39	%		38	%
Blue Cross Blue Shield		11	%		21	%
United Healthcare		17	%		8	%

The Company's third-party payers that represent more than 10% of total net accounts receivable, and their related net accounts receivable balance as a percentage of total net accounts receivable, at December 31, 2018 and 2019 were as follows:

	For the year ended December 31,
	2018			2019
Blue Cross Blue Shield		22	%		26	%
Medicare and Medicare Advantage		17	%		17	%
United Healthcare		15	%		12	%

The Company operates in one reportable business segment and historically has derived most revenues only from within the United States.

Certain components used in the Company’s current or planned products are currently sourced from one supplier, for which alternative suppliers exist but the Company has not validated the product(s) of such alternative supplier(s), and substitutes for these components may not be obtained easily or may require substantial design or manufacturing modifications.

Inventories

Inventories are valued at the lower of cost or net realizable value. Cost is determined by the average cost method. The Company records adjustments to its inventory for estimated obsolescence or diminution in net realizable value equal to the difference between the cost of the inventory and the estimated net realizable value. At the point of loss recognition, a new cost basis for that inventory is established, and subsequent changes in facts and circumstances do not result in the restoration or increase in that newly established cost basis. In addition, the Company records a liability for firm, non-cancelable, and unconditional purchase commitments with contract manufacturers and suppliers for quantities in excess of the Company’s future demand forecasts consistent with its valuation of excess and obsolete inventory.

Fixed Assets

Fixed assets consist of machinery and equipment, furniture and fixtures, computer equipment and software, leasehold improvements, financed equipment and construction in-process. Fixed assets are stated at cost less accumulated depreciation and amortization. Additions, improvements, and major renewals are capitalized. Maintenance, repairs, and minor renewals are expensed as incurred. Depreciation and amortization are recorded using the straight-line method over the estimated useful lives of the assets, which range from three to seven years. Leasehold improvements are amortized over the life of the lease or the asset, whichever is shorter. Depreciation and amortization expense for the years ended December 31, 2018 and 2019 was approximately $801,000 and $932,000, respectively.

Upon sale or disposal of fixed assets, the accounts are relieved of the cost and the related accumulated depreciation or amortization with any gain or loss recorded to the statement of operations and comprehensive loss.

Fixed assets are reviewed for impairment whenever changes in circumstances indicate that the carrying amount of an asset may not be recoverable. These computations utilize judgments and assumptions inherent in the estimates of future cash flows to determine recoverability of these assets. If the assumptions about these assets were to change as a result of events or circumstances, the Company may be required to record an impairment loss. There had been no impairment losses recorded in 2018 and 2019.

Stock-based Compensation

The Company measures and recognizes compensation expense for all stock-based awards made to employees and directors based on their grant date fair values. The Company estimates the fair value of stock option awards on the date of grant using the Black-Scholes option pricing model, while the fair value of restricted stock unit awards, or RSUs, is determined by the Company’s stock price on the date of grant. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods using the straight-line method. In addition, the Company estimates forfeitures at the time of grant and revises these estimates in subsequent periods if actual forfeitures differ from those estimates (see Note 10).

The Company determines the fair value of the stock-based compensation awards granted as either the fair value of the consideration received, or the fair value of the equity instruments issued, whichever is more reliably measurable. All issuances of equity instruments issued to non-employees as consideration for goods or services received by the Company are accounted for based on the fair value of the equity instruments issued. These awards are recorded in expense and additional paid-in capital in shareholders’ equity over the applicable service periods based on the fair value of the options at the end of each period.

Calculating the fair value of stock-based awards requires the input of highly subjective assumptions into the Black-Scholes valuation model. Stock-based compensation expense is calculated using the Company’s best estimates, which involves inherent uncertainties, and the application of management’s judgment. Significant estimates include the expected life of the stock option, stock price volatility and risk-free interest rate.

Research and Development

Research and development costs are expensed as incurred. The amounts expensed in the years ended December 31, 2018 and 2019 were approximately $4,469,000 and $4,697,000, respectively, which includes salaries of research and development personnel.

Income Taxes

The Company provides for income taxes utilizing the liability method. Under the liability method, current income tax expense or benefit is the amount of income taxes expected to be payable or refundable for the current year. A deferred income tax asset or liability is computed for the expected future impact of differences between the financial reporting and tax bases of assets and liabilities and for the expected future tax benefit to be derived from tax credits. Tax rate changes are reflected in the computation of the income tax provision during the period such changes are enacted.

Deferred tax assets are reduced by a valuation allowance when, in management’s opinion, it is more likely than not that some portion or all of the deferred tax assets will not be realized. The Company considers the scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in making this assessment. The Company’s valuation allowance is based on available evidence, including its current year operating loss, evaluation of positive and negative evidence with respect to certain specific deferred tax assets including evaluation sources of future taxable income to support the realization of the deferred tax assets. The Company has established a full valuation allowance on the deferred tax assets as of December 31, 2018 and 2019, and therefore has not recognized any income tax benefit or expense in the periods presented.

A tax benefit from uncertain tax positions may be recognized by the Company when it is more-likely-than-not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, based on the technical merits of the position. Income tax positions must meet a more-likely-than-not recognition threshold to be recognized.

The Company recognizes interest and/or penalties related to income tax matters in income tax expense. There is no accrual for interest or penalties for income taxes on the balance sheets at December 31, 2018 and 2019, and the Company has not recognized interest and/or penalties in the statements of operations and comprehensive loss for the years ended December 31, 2018 and 2019.

Recent Accounting Pronouncements

In February 2016, the Financial Accounting Standards Board, or FASB, issued authoritative guidance, which changes several aspects of the accounting for leases, including the requirement that all leases with durations greater than twelve months be recognized on the balance sheet. The guidance is effective for annual and interim reporting periods in fiscal years beginning after December 15, 2018. Effective January 1, 2019, the Company adopted the guidance and elected the optional transition method to account for the impact of the adoption with a cumulative-effect adjustment in the period of adoption and did not restate prior periods. The Company also elected the practical expedient package as permitted under the transition guidance. As of January 1, 2019, the Company recorded a right-of-use assets and liabilities upon adoption of the guidance (See Note 7).

In August 2017, the FASB issued authoritative guidance that expands and refines hedge accounting for both nonfinancial and financial risk components and align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. This guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early application is permitted. The Company adopted this guidance for the fiscal year beginning on January 1, 2019 and determined that the adoption of this guidance does not have a material impact on its financial statements or disclosures because the Company does not currently hold any financial instruments accounted for as a hedging activity.

In February 2018, the FASB issued authoritative guidance allowing a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from legislation enacted in 2017, informally titled the Tax Cuts and Jobs Act of 2017. These amendments eliminate the stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017. However, because these amendments only relate to the reclassification of the income tax effects of the Tax Cuts and Jobs Act of 2017, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. This guidance also requires certain disclosures about stranded tax effects. This guidance is effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early adoption is permitted. The Company adopted this guidance for the fiscal year beginning on January 1, 2019 which did not have a material impact on its financial statements or disclosures because the Company does not currently maintain any stranded tax effects in accumulated other comprehensive income.

In June 2018, the FASB issued authoritative guidance simplifying the accounting for nonemployee stock-based compensation and largely aligning such compensation with the accounting requirements for employee stock-based awards. For public companies, this guidance is effective for fiscal years beginning after December 15, 2018, including interim periods within that fiscal year. The Company adopted this guidance for the fiscal year beginning on January 1, 2019 and determined that the adoption of this guidance does not have a material impact on its financial statements or disclosures.

In November 2018, the FASB issued authoritative guidance clarifying the interaction between Collaborative Arrangements (Topic 808) and Revenue from Contracts with Customers (Topic 606) to address diversity in practice related to how companies account for collaborative arrangements. For public companies, this guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year. Early adoption is permitted, but no earlier than an entity’s adoption date of Revenue from Contracts with Customers (Topic 606).   The Company currently intends to adopt this guidance upon the effective date and does not anticipate that the adoption of this guidance will have a material impact on its financial statements or disclosures.

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The Company and Business Activities

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

The Company and Business Activities

1. The Company and Business Activities

The Company was founded in California in May 1997 and is an early stage molecular oncology diagnostics company that develops and commercializes proprietary circulating tumor cell, or CTC, and circulating tumor DNA, or ctDNA, assays utilizing a standard blood sample, or liquid biopsy. The Company’s current and planned assays are intended to provide information to aid healthcare providers to identify specific oncogenic alterations that may qualify a subset of cancer patients for targeted therapy at diagnosis, progression or for monitoring in order to identify specific resistance mechanisms. Sometimes traditional procedures, such as surgical tissue biopsies, result in tumor tissue that is insufficient and/or unable to provide the molecular subtype information necessary for clinical decisions. The Company’s assays, performed on blood, have the potential to provide more contemporaneous information on the characteristics of a patient’s disease when compared with tissue biopsy and radiographic imaging. Additionally, commencing in October 2017, the Company’s pathology partnership program, branded as Empower TC ^TM, provides the unique ability for pathologists to participate in the interpretation of liquid biopsy results and is available to pathology practices and hospital systems throughout the United States. Further, sales to laboratory supply distributors of the Company’s proprietary blood collection tubes commenced in June 2018, which allow for the intact transport of liquid biopsy samples for research use only, or RUO, from regions around the world.

The Company operates a clinical laboratory that is CLIA-certified (under the Clinical Laboratory Improvement Amendment of 1988) and CAP-accredited (by the College of American Pathologists), and manufactures cell enrichment and extraction microfluidic channels, related equipment and certain reagents to perform the Company’s diagnostic assays in a facility located in San Diego, California. CLIA certification and accreditation are required before any clinical laboratory may perform testing on human specimens for the purpose of obtaining information for the diagnosis, prevention, treatment of disease, or assessment of health. The assays the Company offers are classified as laboratory developed tests under the CLIA regulations.

In July 2013, the Company effected a reincorporation to Delaware by merging itself with and into Biocept, Inc., a Delaware corporation, which had been formed to be and was a wholly-owned subsidiary of the Company since July 23, 2013.

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April 2014 Credit Facility

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

April 2014 Credit Facility

7. April 2014 Credit Facility

On April 30, 2014, the Company received net cash proceeds of approximately $4,898,000 pursuant to the execution of the April 2014 Credit Facility. Upon the entry into the April 2014 Credit Facility, the Company was required to pay the lender a facility fee of $50,000 in conjunction with the funding of the term loan. The April 2014 Credit Facility was secured by substantially all of the Company’s personal property other than its intellectual property. The term loan under the April 2014 Credit Facility bore interest at an annual rate of 7.95%. The Company was required to make interest-only payments on the term loan through August 1, 2015. The outstanding term loan under the April 2014 Credit Facility began amortizing at the end of the applicable interest-only period, with monthly payments of principal and interest being made by the Company to the lender in consecutive monthly installments following such interest-only period. The term loan under the April 2014 Credit Facility matured on July 1, 2018. Under the original terms of the underlying agreement, the Company was also required to make a final payment to the lender equal to 5.5% of the original principal amount of the term loan funded. Upon maturity and final payoff of the April 2014 Credit Facility on July 1, 2018, security interest in the Company’s personal property was released by the lender.

A warrant to purchase up to 588 shares of the Company’s common stock at an exercise price of $424.80 per share with a term of 10 years was issued to Oxford Finance LLC on April 30, 2014. Issuance costs of approximately $102,000 associated with the term loan under the April 2014 Credit Facility were recorded as a discount to outstanding debt as of the closing date, resulting in net proceeds of approximately $4,898,000. The estimated fair value of the warrant issued of approximately $233,000 was also recorded as a discount to outstanding debt as of the closing date. The discounts and other issuance costs are amortized to interest expense utilizing the effective interest method over the underlying term of the loan.

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Common Stock Warrants Outstanding

12 Months Ended

Dec. 31, 2019

Other Liabilities Disclosure [Abstract]

Common Stock Warrants Outstanding

11. Common Stock Warrants Outstanding

A summary of equity-classified common stock warrant activity, for warrants other than those underlying unexercised overallotment option warrants, during 2018 and 2019 is as follows:

							Average
					Weighted		Remaining
	Number of				Average Exercise		Contractual
	Shares				Price Per Share		Term in Years
Outstanding at December 31, 2017		288,196		$		78.86		4.0
Issued		4,526,731		$		3.85
Exercised		(120,000	)	$		0.01
Expired		—		$		—
Outstanding at December 31, 2018		4,694,927		$		8.55		4.4
Issued		41,189,726		$		0.70
Exercised		(18,395,930	)	$		1.20
Expired		(4,474	)	$		953.06
Outstanding at December 31, 2019		27,484,249		$		1.86		4.6

All warrants outstanding at December 31, 2019 are exercisable and all warrants outstanding at December 31, 2018 were exercisable, except for the 762,438 warrants issued on September 24, 2018, which were first exercisable on March 24, 2019 and expire on March 24, 2024.

Warrants issued in the February 2019 financing transaction have an expiration date of February 12, 2024, warrants issued in the March 2019 transaction have an expiration date of September 19, 2024, warrants issued in the May 2019 inducement offering have an expiration date of July 10, 2025, and warrants issued in the December 2019 have an expiration date of December 11, 2024.

Included in the September 20, 2018 financing transaction the Company issued 120,000 pre-funded warrants to investors.  These pre-funded warrants had an intrinsic value of $350,000, were subsequently fully exercised and are no longer outstanding as of December 31, 2019.  In addition, included in the December 11, 2019 financing transaction the Company issued 5,400,000 pre-funded warrants.  The pre-funded warrants had an intrinsic value of $1.4 million, were subsequently fully exercised and are no longer outstanding as of December 31, 2019.

The intrinsic value of equity-classified common stock warrants outstanding at December 31, 2018 and 2019 was zero.

On January 30, 2018, the Company issued warrants to purchase up to an aggregate of 1,095,153 shares of its common stock, which had an exercise price of $15.00 per share, subject to down round adjustment, are exercisable immediately and expire five years from the date of issuance.  As a result of the down round adjustment feature of these warrants, these warrants have a current exercise price of $0.405 per share as of December 31, 2019.  

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Statements of Operations and Comprehensive Loss - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net revenues	$ 5,528,566	$ 3,250,298
Costs and expenses:
Cost of revenues	10,977,520	10,051,735
Research and development expenses	4,697,022	4,468,572
General and administrative expenses	6,970,120	7,074,024
Sales and marketing expenses	5,940,843	5,914,706
Total costs and expenses	28,585,505	27,509,037
Loss from operations	(23,056,939)	(24,258,739)
Other income/(expense):
Interest expense, net	(249,984)	(310,976)
Warrant inducement expense	(1,831,116)
Total other income/(expense):	(2,081,100)	(310,976)
Loss before income taxes	(25,138,039)	(24,569,715)
Income tax expense		(1,886)
Net loss and comprehensive loss	(25,138,039)	(24,571,601)
Deemed dividend related to warrants down round provision	(121,572)	(636,370)
Net loss attributable to common shareholders	$ (25,259,611)	$ (25,207,971)
Weighted-average shares outstanding used in computing net loss per share attributable to common shareholders:
Basic	20,660,894	2,798,243
Diluted	20,660,894	2,798,243
Net loss per common share:
Basic	$ (1.22)	$ (9.01)
Diluted	$ (1.22)	$ (9.01)

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Selected Quarterly Financial Data (Unaudited) - Summary of Selected Quarterly Financial Data (Detail) - USD ($)		1 Months Ended	3 Months Ended																12 Months Ended
	Jan. 30, 2018	Sep. 30, 2018	Dec. 31, 2019		Sep. 30, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Balance sheet data:
Cash		$ 8,956,200	$ 9,301,406		$ 6,539,444		$ 12,590,597		$ 14,762,198		$ 3,423,373		$ 8,956,200		$ 2,569,111		$ 9,272,420		$ 9,301,406	$ 3,423,373
Total assets		14,551,892	17,732,644		14,520,914		19,904,840		21,891,932		8,750,303		14,551,892		8,291,310		14,747,827		17,732,644	8,750,303
Total non-current liabilities		1,174,397	973,189		1,032,243		983,419		1,452,244		1,098,137		1,174,397		1,258,261		1,357,193		973,189	1,098,137
Total shareholders’ equity		8,938,408	11,200,643		7,705,458		13,099,551		14,014,084		3,042,519		8,938,408		2,527,568		8,507,714		11,200,643	3,042,519	$ 1,296,034
Statement of operations and comprehensive loss data:
Net revenues			1,783,742		1,529,262		1,191,323		1,024,239		859,526		761,591		822,238		806,943		5,528,566	3,250,298
Cost of revenues			2,872,098		2,832,735		2,673,323		2,599,364		2,435,262		2,481,916		2,699,671		2,434,886		10,977,520	10,051,735
Research and development expenses			1,161,905		1,163,546		1,148,280		1,223,291		1,288,957		1,089,746		1,019,285		1,070,584		4,697,022	4,468,572
General and administrative expenses			1,911,593		1,700,380		1,676,310		1,681,837		1,632,670		1,793,720		1,708,970		1,938,664		6,970,120	7,074,024
Sales and marketing expenses			1,489,216		1,462,335		1,614,732		1,374,560		1,440,798		1,404,192		1,433,174		1,636,542		5,940,843	5,914,706
Loss from operations			(5,651,070)		(5,629,734)		(5,921,322)		(5,854,813)		(5,938,161)		(6,007,983)		(6,038,862)		(6,273,733)		(23,056,939)	(24,258,739)
Net loss			(5,713,478)		(5,691,762)		(7,816,012)		(5,916,787)		(6,014,312)		(6,047,784)		(6,153,101)		(6,356,404)		(25,138,039)	(24,571,601)
Deemed dividend related to warrants down round provision	$ (122,000)	$ (636,000)	(21,829)						(99,743)				(636,370)						(121,572)	(636,370)
Net loss attributable to common shareholders			$ (5,735,307)		$ (5,691,762)		$ (7,816,012)		$ (6,016,530)		$ (6,014,312)		$ (6,684,154)		$ (6,153,101)		$ (6,356,404)		$ (25,259,611)	$ (25,207,971)
Net loss per common share:
Basic			$ (0.20)	[1]	$ (0.25)	[1]	$ (0.38)	[1]	$ (0.61)	[1]	$ (1.43)	[1]	$ (2.42)	[1]	$ (2.70)	[1]	$ (3.33)	[1]	$ (1.22)	$ (9.01)
Diluted			$ (0.20)	[1]	$ (0.25)	[1]	$ (0.38)	[1]	$ (0.61)	[1]	$ (1.43)	[1]	$ (2.42)	[1]	$ (2.70)	[1]	$ (3.33)	[1]	$ (1.22)	$ (9.01)
Weighted-average shares outstanding used in computing net loss per share attributable to common shareholders:
Basic			29,128,632		23,018,235		20,466,224		9,792,093		4,209,221		2,767,440		2,280,115		1,911,282		20,660,894	2,798,243
Diluted			29,128,632		23,018,235		20,466,224		9,792,093		4,209,221		2,759,614		2,280,115		1,911,282		20,660,894	2,798,243

[1] Basic and diluted net loss per common share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted net loss per common share.

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Leases - Schedule of Lease Expense (Detail)	12 Months Ended
	Dec. 31, 2019 USD ($)
Finance lease cost
Amortization of right-of-use assets	$ 470,486
Interest on lease liabilities	249,984
Operating lease cost	1,272,024
Total	$ 1,992,494

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Stock-Based Compensation - Additional Information (Detail)			12 Months Ended
	Jun. 17, 2019 shares	Jun. 28, 2018 shares	Dec. 31, 2019 USD ($) Plan $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of equity incentive plans | Plan			2
Total Shares Outstanding			2,732,023	195,820	81,643
Unrecognized share-based compensation expense, weighted-average recognition period			3 years 1 month 9 days
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Estimated forfeitures rate			8.00%	8.00%
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Estimated forfeitures rate			0.00%	0.00%
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			10 years
Option awards assumptions, method used			Black-Scholes pricing model
Weighted-average estimated fair value of options granted | $ / shares			$ 0.91	$ 1.75
Intrinsic value of options outstanding | $			$ 0	$ 0
Intrinsic value of options exercisable | $			0	0
Intrinsic value of options vested and unvested expected to vest | $			$ 0	$ 0
Stock Options [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Employee Stock Option One [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Time period for vesting grants in installments on monthly basis			monthly thereafter for the remaining three years
Employee Stock Option Two [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options vesting term			monthly vesting beginning month-one after the grant and monthly thereafter
RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Intrinsic value shares, RSUs outstanding | $			$ 100
Intrinsic value amount, RSUs unvested and vested expected to vest | $			$ 100
RSUs outstanding			360	360	12,030
Stock Options and RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized share-based compensation expense, stock options | $			$ 2,222,000
Options Vesting on One Year Anniversary [Member] | Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of Overall Stock Grant Subject to Vesting			25.00%
2013 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock options and RSUs authorized			124,211
2013 Equity Incentive Plan [Member] | Non-inducement Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock options and RSUs authorized			3,064,098
Increase in number of shares of common stock authorized for issuance	2,800,000	146,666
Stock options and RSUs issued			2,731,962
Total Shares Outstanding			2,615,503
Common stock, shares authorized			332,136
2013 Equity Incentive Plan [Member] | Inducement shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options and RSUs issued			118,368
Total Shares Outstanding			117,534
Common stock, shares authorized			0

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Liquidity and Going Concern Uncertainty- Additional Information (Detail) - USD ($)								1 Months Ended		3 Months Ended								12 Months Ended
	Mar. 04, 2020	Mar. 02, 2020	Mar. 19, 2019	Feb. 12, 2019	Jan. 18, 2019	Aug. 13, 2018	Jan. 30, 2018	Feb. 29, 2020	May 31, 2019	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 11, 2019	Sep. 20, 2018
Liquidity And Managements Plans [Line Items]
Cash										$ 9,301,406	$ 6,539,444	$ 12,590,597	$ 14,762,198	$ 3,423,373	$ 8,956,200	$ 2,569,111	$ 9,272,420	$ 9,301,406	$ 3,423,373
Accumulated deficit										(245,717,189)				(220,457,578)				(245,717,189)	(220,457,578)
Net loss										(5,713,478)	$ (5,691,762)	$ (7,816,012)	$ (5,916,787)	$ (6,014,312)	$ (6,047,784)	$ (6,153,101)	$ (6,356,404)	(25,138,039)	(24,571,601)
Cash flows from operations																		(23,049,261)	(22,355,218)
Aggregate net interest-bearing indebtedness										1,700,000								1,700,000
Other non-interest-bearing current liabilities										2,800,000								2,800,000
Aggregate net interest-bearing indebtedness due within one year										$ 724,000								724,000
Proceeds from warrant exercise inducement, net																		2,337,298
Proceeds from exercise of common stock warrants																		$ 2,513,173	$ 1,200
Issuance of warrants to purchase shares of common stock																				1,925,000
Stock price			$ 1.37		$ 2.25																$ 3.285
Class of warrant or rights, term			5 years 6 months			5 years												5 years
Proceeds from issuance of common stock, net of issuance costs			$ 7,600,000		$ 2,000,000
Shares issued in offering			5,950,000		990,000
Warrant [Member]
Liquidity And Managements Plans [Line Items]
Proceeds from exercise of common stock warrants									$ 2,500,000
Class of warrant or rights, term							5 years
Over-allotment Option [Member] | Warrant [Member]
Liquidity And Managements Plans [Line Items]
Shares issued in offering				915,000
Subsequent Event [Member]
Liquidity And Managements Plans [Line Items]
Stock price	$ 0.41	$ 0.40
Proceeds from issuance of common stock, net of issuance costs	$ 6,100,000	$ 8,500,000
Shares issued in offering	16,000,000	23,000,000
Subsequent Event [Member] | Warrant [Member]
Liquidity And Managements Plans [Line Items]
Issuance of warrants to purchase shares of common stock								6,927,258
Stock price								$ 0.3495
Class of warrant or rights, term								5 years
Subsequent Event [Member] | Over-allotment Option [Member] | Warrant [Member]
Liquidity And Managements Plans [Line Items]
Proceeds from exercise of common stock warrants								$ 700,000
February 2020 Warrant Exercise Inducement Offering [Member] | Subsequent Event [Member]
Liquidity And Managements Plans [Line Items]
Proceeds from warrant exercise inducement, net								$ 2,200,000

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Common Stock Warrants Outstanding (Tables)

12 Months Ended

Dec. 31, 2019

Equity Classified Warrants [Abstract]

Summary of Equity-Classified Common Stock Warrant Activity, for Warrants Other than Underlying Unexercised Overallotment Option Warrants

A summary of equity-classified common stock warrant activity, for warrants other than those underlying unexercised overallotment option warrants, during 2018 and 2019 is as follows:

							Average
					Weighted		Remaining
	Number of				Average Exercise		Contractual
	Shares				Price Per Share		Term in Years
Outstanding at December 31, 2017		288,196		$		78.86		4.0
Issued		4,526,731		$		3.85
Exercised		(120,000	)	$		0.01
Expired		—		$		—
Outstanding at December 31, 2018		4,694,927		$		8.55		4.4
Issued		41,189,726		$		0.70
Exercised		(18,395,930	)	$		1.20
Expired		(4,474	)	$		953.06
Outstanding at December 31, 2019		27,484,249		$		1.86		4.6

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Document and Entity Information - USD ($)

12 Months Ended

Dec. 31, 2019

Mar. 20, 2020

Jun. 28, 2019

Cover [Abstract]

Document Type

10-K

Amendment Flag

false

Document Period End Date

Dec. 31, 2019

Document Fiscal Year Focus

2019

Document Fiscal Period Focus

FY

Trading Symbol

BIOC

Entity Registrant Name

BIOCEPT INC

Entity Central Index Key

0001044378

Current Fiscal Year End Date

--12-31

Entity Well-known Seasoned Issuer

No

Entity Voluntary Filers

No

Entity Filer Category

Non-accelerated Filer

Entity Small Business

true

Entity Emerging Growth Company

false

Entity Common Stock, Shares Outstanding

108,707,392

Entity Public Float

$ 25,526,638

Document Annual Report

true

Document Transition Report

false

Entity File Number

001-36284

Entity Incorporation, State or Country Code

DE

Entity Tax Identification Number

80-0943522

Entity Address, Address Line One

5810 Nancy Ridge Drive

Entity Address, City or Town

San Diego

Entity Address, State or Province

CA

Entity Address, Postal Zip Code

92121

City Area Code

858

Local Phone Number

320-8200

Title of 12(b) Security

Common Stock, par value $.0001 per share

Security Exchange Name

NASDAQ

Entity Shell Company

false

Entity Current Reporting Status

Yes

Entity Interactive Data Current

Yes

Documents Incorporated by Reference

Portions of the registrant’s definitive Proxy Statement for the 2020 Annual Meeting of Stockholders, to be filed with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Form 10-K, are incorporated by reference in Part III, Items 10-14 of this Form 10-K. Except for the portions of the Proxy Statement specifically incorporated by reference in this Form 10-K, the Proxy Statement shall not be deemed to be filed as part hereof.

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Net Loss per Common Share

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Net Loss per Common Share

12. Net Loss per Common Share

Basic and diluted net loss per common share is determined by dividing net loss applicable to common shareholders by the weighted-average common shares outstanding during the period. Because there is a net loss attributable to common shareholders for the years ended December 31, 2018 and 2019, the outstanding RSUs, warrants, and common stock options have been excluded from the calculation of diluted loss per common share because their effect would be anti-dilutive. Therefore, the weighted-average shares used to calculate both basic and diluted loss per share are the same.

The following potentially dilutive securities have been excluded from the computations of diluted weighted-average shares outstanding for the periods presented, as they would be anti-dilutive:

	For the years ended
	December 31,
	2018		2019
Preferred warrants outstanding (number of common stock equivalents)		17		—
Common warrants outstanding		4,694,927		27,484,249
RSUs outstanding		360		360
Convertible preferred stock outstanding (number of common stock equivalents)		976,157		471,393
Common options outstanding		195,820		2,732,023
Total anti-dilutive common share equivalents		5,867,281		30,688,025

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Statements of Shareholders' Equity - USD ($)	Total	January 2018 Financing Transaction [Member]	September 2018 Registered Direct Offering [Member]	January 2019 Financing Transaction [Member]	February 2019 Financing [Member]	January 2019 Financing Transaction Overallotment [Member]	March 2019 Financing Transaction [Member]	December 2019 Underwritten Offering [Member]	August 2018 Rights Offering [Member]	Pre-funded Warrants [Member]	Common Stock [Member]	Common Stock [Member] January 2018 Financing Transaction [Member]	Common Stock [Member] September 2018 Registered Direct Offering [Member]	Common Stock [Member] January 2019 Financing Transaction [Member]	Common Stock [Member] February 2019 Financing [Member]	Common Stock [Member] January 2019 Financing Transaction Overallotment [Member]	Common Stock [Member] March 2019 Financing Transaction [Member]	Common Stock [Member] December 2019 Underwritten Offering [Member]	Common Stock [Member] Cashless Warrants [Member]	Common Stock [Member] Pre-funded Warrants [Member]	SeriesA Convertible Preferred Stock [Member]	SeriesA Convertible Preferred Stock [Member] August 2018 Rights Offering [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] January 2018 Financing Transaction [Member]	Additional Paid-in Capital [Member] September 2018 Registered Direct Offering [Member]	Additional Paid-in Capital [Member] January 2019 Financing Transaction [Member]	Additional Paid-in Capital [Member] February 2019 Financing [Member]	Additional Paid-in Capital [Member] January 2019 Financing Transaction Overallotment [Member]	Additional Paid-in Capital [Member] March 2019 Financing Transaction [Member]	Additional Paid-in Capital [Member] December 2019 Underwritten Offering [Member]	Additional Paid-in Capital [Member] August 2018 Rights Offering [Member]	Additional Paid-in Capital [Member] Cashless Warrants [Member]	Additional Paid-in Capital [Member] Pre-funded Warrants [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2017	$ 1,296,034										$ 118												$ 196,545,523											$ (195,249,607)
Beginning balance, shares at Dec. 31, 2017											1,181,179
Net loss	(6,356,404)
Ending balance at Mar. 31, 2018	8,507,714
Beginning balance at Dec. 31, 2017	1,296,034										$ 118												196,545,523											(195,249,607)
Beginning balance, shares at Dec. 31, 2017											1,181,179
Stock-based compensation expense	623,412																						623,412
Shares issued for restricted stock units											$ 1												(1)
Shares issued for restricted stock units, shares											5,833
Shares issued upon exercise of common stock warrants										$ 1,200										$ 12													$ 1,188
Shares issued upon exercise of common stock warrants, shares																				120,000
Deemed dividends related warrants downround provision	636,370																						636,370											(636,370)
Shares and warrants issued, net of issuance costs		$ 13,342,819	$ 2,252,793						$ 10,097,862			$ 110	$ 64									$ 1		$ 13,342,709	$ 2,252,729						$ 10,097,861
Shares and warrants issued, net of issuance costs, shares												1,095,153	642,438									11,587
Shares issued upon conversion of preferred stock											$ 158										$ (1)		(157)
Shares issued upon conversion of preferred stock, shares											1,584,571										(7,170)
Net loss	(24,571,601)																																	(24,571,601)
Ending balance at Dec. 31, 2018	3,042,519										$ 463												223,499,634											(220,457,578)
Ending balance, shares at Dec. 31, 2018											4,629,174										4,417
Beginning balance at Mar. 31, 2018	8,507,714
Net loss	(6,153,101)
Ending balance at Jun. 30, 2018	2,527,568
Deemed dividends related warrants downround provision	636,370
Net loss	(6,047,784)
Ending balance at Sep. 30, 2018	8,938,408
Net loss	(6,014,312)
Ending balance at Dec. 31, 2018	3,042,519										$ 463												223,499,634											(220,457,578)
Ending balance, shares at Dec. 31, 2018											4,629,174										4,417
Deemed dividends related warrants downround provision	99,743
Net loss	(5,916,787)
Ending balance at Mar. 31, 2019	14,014,084
Beginning balance at Dec. 31, 2018	3,042,519										$ 463												223,499,634											(220,457,578)
Beginning balance, shares at Dec. 31, 2018											4,629,174										4,417
Stock-based compensation expense	869,579																						869,579
Shares issued upon exercise of common stock warrants	4,850,471									$ 54,000	$ 416								$ 712	$ 540			4,850,055									$ (712)	$ 53,460
Shares issued upon exercise of common stock warrants, shares											4,155,430								7,120,250	5,400,000
Deemed dividends related warrants downround provision	121,572																						121,572											(121,572)
Shares and warrants issued, net of issuance costs				$ 2,032,311	$ 6,602,735	$ 592,306	$ 7,553,793	$ 8,909,852						$ 99	$ 625	$ 54	$ 595	$ 1,920								$ 2,032,212	$ 6,602,110	$ 592,252	$ 7,553,198	$ 8,907,932
Shares and warrants issued, net of issuance costs, shares														990,000	6,250,000	538,867	5,950,000	19,200,000
Warrant inducement expense	1,831,116																						1,831,116
Shares issued upon conversion of preferred stock											$ 50												(50)
Shares issued upon conversion of preferred stock, shares											504,764										(2,284)
Net loss	(25,138,039)																																	(25,138,039)
Ending balance at Dec. 31, 2019	11,200,643										$ 5,474												256,912,358											(245,717,189)
Ending balance, shares at Dec. 31, 2019											54,738,485										2,133
Beginning balance at Mar. 31, 2019	14,014,084
Net loss	(7,816,012)
Ending balance at Jun. 30, 2019	13,099,551
Net loss	(5,691,762)
Ending balance at Sep. 30, 2019	7,705,458
Deemed dividends related warrants downround provision	21,829
Net loss	(5,713,478)
Ending balance at Dec. 31, 2019	$ 11,200,643										$ 5,474												$ 256,912,358											$ (245,717,189)
Ending balance, shares at Dec. 31, 2019											54,738,485										2,133

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Sales of Equity Securities

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Sales of Equity Securities

4. Sales of Equity Securities

On January 30, 2018, the Company received net cash proceeds of approximately $13.3 million as a result of the closing of a follow-on public offering of 1,095,153 shares of its common stock and warrants to purchase up to an aggregate of 1,095,153 shares of its common stock at a combined offering price of $13.50 per unit with $1.4 million of costs directly associated with the offering recorded as an offset to additional paid-in capital under applicable accounting guidance. At December 31, 2019 all warrants sold in this offering have an exercise price of $0.405 per share, which is subject to down round adjustment,are exercisable immediately and expire five years from the date issuance. The aggregate estimated grant date fair value of $9.7 million was recorded as an offset to additional paid-in capital upon the closing of this offering.

In May 2018, the SEC declared effective a shelf registration statement filed by the Company, which expires in May 2021. The shelf registration statement allows the Company to issue any combination of our common stock, preferred stock, debt securities and warrants from time to time for an aggregate initial offering price of up to $50 million, subject to certain limitations for so long as our public float is less than $75 million.

On August 13, 2018, the Company completed a rights offering. Pursuant to the rights offering, the Company sold an aggregate of 11,587 units consisting of an aggregate of 11,587 shares of Series A Preferred Stock and 2,549,140 warrants, with each warrant exercisable for one share of our common stock at an exercise price of $4.53 per share, resulting in net proceeds to the Company of approximately $10.1 million, after deducting expenses relating to the rights offering, including dealer-manager fees and expenses, and excluding any proceeds received upon exercise of any warrants. Each share of Series A Preferred Stock will be convertible, at the Company’s option at any time on or after the first anniversary of the closing of the Rights Offering or at the option of the holder at any time, into the number of shares of the Company’s common stock, par value $0.0001 per share determined by dividing the $1,000 stated value per share of the Series A Preferred Stock by a conversion price of $4.53 per share. In addition, the conversion price per share is subject to adjustment for stock dividends, distributions, subdivisions, combinations or reclassifications.  Holders of Series A Preferred Stock shall be entitled to receive dividends (on an as-if-converted-to-common-stock basis) in the same form as dividends actually paid on shares of the Common Stock when, as and if such dividends are paid on shares of Common Stock. The Series A Preferred Stock have no voting rights. Upon the Company’s liquidation, dissolution or winding-up, whether voluntary or involuntary, holders of Series A Preferred Stock will be entitled to receive out of the assets, whether capital or surplus, of the Company the same amount that a holder of Common Stock would receive if the Series A Preferred Stock were fully converted (disregarding for such purpose any conversion limitations thereunder) to Common Stock, which amounts shall be paid pari passu with all holders of Common Stock. The Company is not obligated to redeem or repurchase any shares of Series A Preferred Stock.

On September 20, 2018, the Company completed an offering of 642,438 shares of the Company’s common stock and prefunded warrants to purchase up to an aggregate of 120,000 shares of its common stock. The shares were sold at a purchase price of $3.285 per share and the pre-funded warrants were sold at a purchase price of $3.275 per pre-funded warrant which represents the per share purchase price for the shares less the $0.01 per share exercise price for each such pre-funded warrant. The net proceeds to the Company from this offering were approximately $2.2 million, after deducting expenses related to the offering including dealer-manager fees and expenses, and excluding any proceeds received upon exercise of any warrants. In addition, in a concurrent private placement, the Company issued to purchasers a warrant to purchase one share of the Company’s common stock for each share and pre-funded warrant purchased for cash in the offering. All warrants issued in this offering have an exercise price of $3.16 per share, are exercisable upon the six-month anniversary of issuance and expire five years from such date.

On January 18, 2019, the Company completed an offering of 990,000 shares of the Company’s common stock. The shares were sold at a purchase price of $2.25 per share and the net proceeds to the Company from this offering were approximately $2.0 million, after deducting expenses related to the offering including dealer-manager fees and expenses.

On February 12, 2019, the Company received net cash proceeds of approximately $6.6 million as a result of the closing of a follow-on public offering of 6,250,000 shares of its common stock and warrants to purchase up to an aggregate of 6,250,000 shares of its common stock at a combined offering price of $1.20 per unit. All warrants sold in this offering have an exercise price of $1.20 per share, are exercisable immediately and expire five years from the date of issuance. In addition, the Company sold warrants to purchase up to an aggregate of 937,500 shares of the Company’s common stock in connection with the partial exercise of the over-allotment option granted to the underwriters. Upon closing of the transaction, warrants to purchase 915,000 shares were issued pursuant to the placement agents’ partial exercise of their overallotment. Subsequent to the closing of this offering, no additional cash proceeds have been received from the exercise of warrants sold in this offering.  On March 11, 2019, the underwriters exercised their overallotment option for 538,867 shares of the Company’s common stock related to the February 12, 2019 follow-on offering, purchasing shares at $1.20 per share for net cash proceeds of approximately $592,000.

On March 19, 2019, the Company received net cash proceeds of approximately $7.6 million as a result of completing a registered direct offering of 5,950,000 shares at a negotiated purchase price of $1.37 per share. In addition, in a concurrent private placement, the Company issued to purchasers a warrant to purchase one share of the Company’s common stock for each share purchased for cash in the offering.  All warrants issued in this offering have an exercise price of $1.25 per share, are exercisable immediately upon issuance and expire 5.5 years following the date of issuance.

In May 2019, the Company received cash proceeds of approximately $2.5 million from the exercise of 2,086,479 February 2019 warrants at $1.20 per share.

On May 28, 2019, the Company entered into Warrant Exercise Agreements, or the Exercise Agreements, with certain of the holders of its existing warrants, or the Exercising Holders. Pursuant to the Exercise Agreements, the Exercising Holders and the Company agreed that, subject to any applicable beneficial ownership limitations, the Exercising Holders would cash exercise up to 20% of their Existing Warrants, or the Investor Warrants, into shares of common stock underlying such Existing Warrants, or the Exercised Shares. In order to induce the Exercising Holders to cash exercise the Investor Warrants, the Exercise Agreements provided for the issuance of new warrants, or the New Warrants, with such New Warrants to be issued in an amount equal to 75% of the number of Exercised Shares underlying any Investor Warrants that was cash exercised by July 15, 2019. The New Warrants were exercisable upon issuance and terminate on the date that is five-years and six-months following the initial exercise date. The New Warrants have an exercise price per share of $1.31.  A total of 2,062,966 Investor Warrants were exercised contemporaneously with the execution of the Exercise Agreements resulting in total proceeds to the Company of $2.3 million, net of investment banking fees. The warrants issued in connection with the Exercise Agreement were considered inducement warrants and are classified in equity. The fair value of the warrants issued was approximately $1.8 million and the fair value of the inducement warrants was expensed as warrant inducement expense in the accompanying statement of operations for the year ended December 31, 2019.   

On July 15, 2019, the Company entered into amendments (the “Amendments”) to the Exercise Agreements.  Pursuant to the Amendments, the period during which the Exercising Holders may elect to exercise for cash the Existing Warrants in exchange for new warrants to purchase common stock to be issued in an amount equal to 75% of the number of shares of common stock exercised under the Existing Warrants was extended from July 15, 2019 to July 31, 2019.  There were no additional warrants exercised under the Amendments during the remainder of 2019.

In December 2019, the Company received net cash proceeds from an underwritten offering of approximately $8.9 million from the issuance of 19,200,000 shares of common stock, pre-funded warrants to purchase 5,400,000 shares of common stock, and warrants to purchase an aggregate of 24,600,000 shares of common stock.  Each share was sold together with a common warrant to purchase one share of common stock at a combined price of $0.405 per share of common stock and accompanying warrant. Each pre-funded warrant was sold together with a common warrant to purchase one share of common stock at a combined price of $0.395 per pre-funded warrant and accompanying warrant.  Each prefunded warrant had an exercise price of $0.01 per share and was exercisable immediately upon issuance and expired when exercised in full.  In addition, underwriters were granted an option to purchase up to an additional 3,690,000 shares of common stock and/or common warrants.  Common warrants issued in this offering have an exercise price of $0.405 per share, are exercisable immediately upon issuance and expire 5 years following the date of issuance. In addition, the common warrants have a cashless exercise provision, pursuant to which holders can exercise the warrant without cash payment for 50% of the number of shares of common stock that would issuable upon exercise of the common warrant if such exercise were by means of a cash exercise rather than a cashless exercise.  Pursuant to the cashless exercise provision in the common warrants, 14.2 million common warrants were exercised for 7.1 million shares of common stock as of December 31, 2019.

Pursuant to the down round adjustment feature of the January 2018 warrants, the exercise price of these warrants was adjusted to the $1.20 price per share offering price in the February 2019 financing transaction, and to the $0.405 offering price in the December 2019 financing transaction.

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Liquidity and Going Concern Uncertainty

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Liquidity and Going Concern Uncertainty

2. Liquidity and Going Concern Uncertainty

As of December 31, 2019, cash totaled $9.3 million and the Company had an accumulated deficit of $245.7 million. For the years ended December 31, 2018 and 2019, the Company incurred net losses of $24.6 million and $25.1 million, respectively, and had negative cash flows from operations of $22.4 million and $23.0 million, respectively.At December 31, 2019, the Company had aggregate net interest-bearing indebtedness of $1.7 million of which $724,000 was due within one year, in addition to approximately $2.8 million of other non-interest-bearing current liabilities.  The accompanying financial statements and notes have been prepared assuming that the Company will continue as a going concern. The accompanying financial statements and notes do not include any adjustments to reflect the possible future effects on the recoverability and classification of assets or the amounts and classification of liabilities that may result from the possible inability of the Company to continue as a going concern.

While the Company is currently in the commercialization stage of operations, the Company has not yet achieved profitability and anticipates that it will continue to incur net losses and negative cash flows from operations for the foreseeable future. Historically, the Company’s principal sources of cash have included proceeds from the issuance of common and preferred stock, proceeds from the exercise of warrants to purchase common stock, proceeds from the issuance of debt, and revenues from laboratory services. The Company’s principal uses of cash have included cash used in operations, payments relating to purchases of property and equipment and repayments of borrowings. The Company expects that the principal uses of cash in the future will be for continuing operations, hiring of sales and marketing personnel and increased sales and marketing activities, funding of research and development, capital expenditures, and general working capital requirements which are expected to be consistent with prior years. The Company expects that, as revenues grow, sales and marketing and research and development expenses will continue to grow, albeit at a slower rate and, as a result, the Company will need to generate significant growth in net revenues to achieve and sustain income from operations. These factors raise substantial doubt about the Company’s ability to continue as a going concern for the one-year period following the date that these financial statements were issued.

On March 11, 2020 the World Health Organization declared the novel strain of coronavirus (COVID-19) a global pandemic and recommended containment and mitigation measures worldwide.  In addition, as we are located in California, we are currently under a shelter in place mandate and many of our clients worldwide are similarly impacted.  As a healthcare provider, we are allowed to remain open in compliance with the shelter in place mandate and continue to provide critical information for patients diagnosed with cancer. However, the global outbreak of the COVID-19 coronavirus continues to rapidly evolve, and the extent to which the COVID-19 coronavirus may impact our business will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the ultimate geographic spread of the disease, the duration of the outbreak, travel restrictions and social distancing in the United States and other countries, business closures or business disruptions, and the effectiveness of actions taken in the United States and other countries to contain and treat the disease.  While we are still receiving specimens from clients on a daily basis, we anticipate a potential slowdown in volume as many clinic visits are being re-scheduled and delayed.  We are continuing to vigilantly monitor the situation with our primary focus on the health and safety of our employees and clients.

In February 2020, the Company received net proceeds of approximately $2.2 million related to the February 2020 Warrant Exercise Inducement offering as well as an additional $700,000 from the underwriter exercising its overallotment warrants from the December 2019 underwritten financing transaction.  In addition, as inducement for these exercises, the Company issued 6,927,258 warrants to purchase shares of common stock at $0.3495 per share.  The warrants are exercisable on the six-month anniversary of issuance and expire in five years from the date first exercisable.

On March 2, 2020, the Company received net cash proceeds of approximately $8.5 million from a registered direct offering to certain institutional investors of 23,000,000 shares of common stock at a negotiated purchase price of $0.40 per share.

On March 4, 2020, the Company received net cash proceeds of approximately $6.1 million from a registered direct offering to certain institutional investors of 16,000,000 shares of common stock at a negotiated purchase price of $0.41 per share.

Management’s Plan to Continue as a Going Concern

In order to continue as a going concern, the Company will need, among other things, additional capital resources. Until the Company can generate significant cash from operations, including assay revenues, management’s plans to obtain such resources for the Company include proceeds from offerings of the Company’s equity securities or debt, or transactions involving product development, technology licensing or collaboration. Management can provide no assurances that any sources of a sufficient amount of financing will be available to the Company on favorable terms, if at all. After considering the factors described above and management’s plans, the Company has concluded that there is substantial doubt about the Company’s ability to continue as a going concern within one year after the date that the financial statements are issued.

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Leases

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Leases

8. Leases

Effective January 1, 2019, the Company adopted US GAAP accounting rules in ASC Topic 842, Leases (ASC 842), using the modified retrospective method.  The Company elected to follow the package of practical expedients provided under the transition guidance within ASC 842, and accordingly, did not reassess whether any expired or existing contracts are or contain leases, did not reassess expired or existing leases, and did not reassess initial direct costs for any existing leases.  Upon adoption, the Company recorded an operating lease right-of-use asset and an operating lease liability on the balance sheet.  In addition, assets under equipment leases previously classified as capital leases within Property, Plant and Equipment on the Company’s balance sheet were reclassified to finance lease right-of-use assets upon adoption of the guidance.  Right-of-use assets and obligations were recognized based on the present value of remaining lease payments over the lease term.  As the Company’s operating lease does not provide an implicit rate, an estimated incremental borrowing rate was used based on the information available at the adoption date in determining the present value of lease payments.  Operating lease expense is recognized on a straight-line basis over the lease term.  Variable lease costs such as common area costs and other operating costs are expensed as incurred.  Leases with an initial term of 12 months or less are not recorded on the balance sheet.  

Finance Leases

The Company leases certain laboratory equipment under arrangements previously accounted for as capital leases, classified on the Company’s balance sheet as fixed assets and related lease liabilities and depreciated on a straight-line basis over the lease term. Upon adoption of ASC 842, leased equipment previously classified as fixed assets totaling $1.4 million in net book value were reclassified to lease right-of-use assets in accordance with the guidance.  The equipment under finance leases is depreciated on a straight-line basis over periods ranging from 5 to 7 years. The total gross value of equipment capitalized under such lease financing arrangements was approximately $2,574,000 and $3,125,000 at December 31, 2018 and 2019, respectively. Total accumulated depreciation related to equipment under finance leases was approximately $1,135,000 and $1,606,000 at December 31, 2018 and 2019, respectively, and total depreciation expense was approximately $376,000 and $454,000, at December 31, 2018 and 2019, respectively. Fixed asset purchases totaling approximately $279,000 and $633,000 during the years ended December 31, 2018 and 2019, respectively, were recorded as finance leases.

On January 31, 2019, the Company executed a finance lease commitment with a third-party lender for total amount of approximately $149,000, which was funded by the lender on February 1, 2019. Under the terms of the equipment financing agreement, which was accounted for as a finance lease transaction, the principal balance plus interest for the equipment are to be repaid in full after 36 monthly installments of $5,013 totaling approximately $180,000 through February 2022.

In July 2019, a finance lease commitment was executed with a third-party lender for the total amount of approximately $100,000, which was accounted for as a finance lease transaction with the principal balance plus interest for the equipment to be repaid in full after 48 monthly installments of $2,706 totaling approximately $130,000 through May 2023.

In August 2019, a finance lease commitment was executed with a third-party lender for the total amount of approximately $245,000, which was accounted for as a finance lease transaction with the principal balance plus interest for the equipment to be repaid in full after 36 monthly installments of $8,253 totaling approximately $297,000 through August 2022.

In September 2019, a finance lease commitment was executed with a third-party lender for the total additional amount of approximately $89,000, which was accounted for as a finance lease transaction with the principal balance plus interest for the equipment to be repaid in full after 60 monthly installments of $1,770 totaling approximately $106,000 through September 2024.

In December 2019, two finance lease commitments were executed with third-party lenders. The first with a total principal of $28,000, 60-month term and $597 monthly payments totaling approximately $36,000 over the lease term.  The second finance lease had a total principal of $22,000, 48-month lease term and $563 monthly payments totaling approximately $27,000 over the lease term. Both of these transactions were accounted for as finance leases.  

Operating Lease

The Company leases its primary laboratory and office facilities in San Diego, California.  This lease is classified as an operating lease in accordance with the ASC 842 guidance.  The average monthly cash payment for the operating lease is approximately $120,000 per month, and the lease term ends on July 31, 2020.  The Company recorded a lease right-of-use asset and lease liability of $1,930,000 and $2,201,000, respectively, as of January 1, 2019, based on the present value of payments and an incremental borrowing rate of 4.5%.

In addition, the Company reviews agreements at inception to determine if they include a lease, and when they do, uses its incremental borrowing rate or implicit interest rate to determine the present value of the future lease payments.

The following schedule sets forth the components of right-of-use lease assets as of December 31, 2018 and 2019 as follows:

	December 31,		December 31,
	2018		2019
Lease right-of-use assets:
Operating	$	—	$	729,330
Finance		—		1,606,387
Total	$	—	$	2,335,717

The following schedule sets forth the current portion of operating and finance lease liabilities as of December 31, 2018 and 2019:

	December 31,		December 31,
	2018		2019
Current  portion of lease liability:
Operating	$	—	$	842,452
Finance		—		724,329
Total	$	—	$	1,566,781

The following schedule sets forth the long-term portion of operating and finance lease liabilities as of December 31, 2018 and 2019:

	December 31,		December 31,
	2018		2019
Long-term portion of lease liability:
Operating	$	—	$	—
Finance		—		973,189
Total	$	—	$	973,189

The following schedule represents the components of lease expense for the years ended December 31, 2018 and 2019:

	For the years ended December 31,
	2018		2019
Lease cost
Finance lease cost
Amortization of right-of-use assets	$	—	$	470,486
Interest on lease liabilities		—		249,984
Operating lease cost		—		1,272,024
Total	$	—	$	1,992,494

The following schedule sets forth the remaining future minimum lease payments outstanding under finance and operating leases, as well as corresponding remaining sales tax and maintenance obligation payments that are expensed as incurred and due within each respective year ending December 31, as well as the present value of the total amount of the remaining minimum lease payments, as of December 31, 2019:

	Finance					Operating
	Minimum			Maintenance and		Minimum
	Lease			Sales Tax Obligation		Lease
	Payments			Payments		Payments
2020	$	779,049		$	90,260	$	855,136
2021		531,846			69,053		—
2022		408,396			57,499		—
2023		284,380			58,098		—
Thereafter		69,674			9,536		—
Total payments		2,073,345			284,446		855,136
Less amount representing interest		(375,827	)		—		(12,684	)
Present value of payments	$	1,697,518		$	284,446	$	842,452

The following schedule sets forth supplemental cash flow information related to operating and finance leases as of December 31, 2019:

	For the year ended December 31, 2019
Other information
Operating cash flows from finance leases	$	249,984
Operating cash flows from operating leases	$	1,430,366
Financing cash flows from finance leases	$	539,415

The aggregate weighted average remaining lease term was 3.02 years on finance leases and 0.59 years on operating leases as of December 31, 2019.  The aggregate weighted average discount rate was 21.93% on finance leases and 4.5% on operating leases as of December 31, 2019.  

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Commitments and Contingencies - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Feb. 29, 2016 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2012	Nov. 30, 2011 ft²
Loss Contingencies [Line Items]
Lease expiration date		Jul. 31, 2020
Unconditional purchase commitment aggregate amount	$ 1,062,500	$ 91,000
Unconditional purchase commitment payment terms		Quarterly
Unconditional purchase commitment period		May 31, 2020
Total expense for sales tax and maintenance obligations		$ 122,000	$ 101,000
Total amounts for future sales tax and maintenance obligations		284,446
Accrued Other Liabilities [Member]
Loss Contingencies [Line Items]
Sales tax and maintenance obligations incurred but not paid		$ 73,000	$ 69,000
Minimum [Member]
Loss Contingencies [Line Items]
Unconditional purchase commitment, quarterly payment amount	$ 62,500
San Diego California Facility [Member]
Loss Contingencies [Line Items]
Initial lease term				8 years
Lease expiration date			Oct. 31, 2018
Leased facility, expansion of original premises | ft²					9,849

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Leases - Schedule of Remaining Future Minimum Lease Payments for Finance and Operating Leases (Detail)	Dec. 31, 2019 USD ($)
Financing Lease Minimum Payment Abstract
2020	$ 779,049
2021	531,846
2022	408,396
2023	284,380
Thereafter	69,674
Total payments	2,073,345
Less amount representing interest	(375,827)
Present value of payments	1,697,518
Financing Lease Maintenance and Sales Tax Obligation Payments Abstract
2020	90,260
2021	69,053
2022	57,499
2023	58,098
Thereafter	9,536
Total payments	284,446
Present value of payments	284,446
Operating Lease Minimum Payment Abstract
2020	855,136
Total payments	855,136
Less amount representing interest	(12,684)
Present value of payments	$ 842,452

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Stock-Based Compensation - Assumptions Used for Determining Fair Value of Stock Options Under Black-Scholes Pricing Model (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock and exercise prices	$ 0.29	$ 0.86
Discount rate-bond equivalent yield	1.58%	2.50%
Expected life (in years)	4 years	4 years
Expected volatility	128.00%	100.00%
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock and exercise prices	$ 1.03	$ 6.00
Discount rate-bond equivalent yield	2.55%	3.02%
Expected life (in years)	5 years 11 months 15 days	5 years 11 months 15 days
Expected volatility	156.00%	120.00%

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Related Party Transactions - Additional Information (Detail) - Aegea Biotechnologies, Inc [Member] - USD ($)		1 Months Ended	12 Months Ended
	Jan. 01, 2019	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Reimbursement for shared patent costs			$ 26,000	$ 19,000
Percentage of royalty on sale of product	10.00%
Royalty expense		$ 12,000
Accrued royalty expense		$ 7,000	$ 7,000

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Common Stock Warrants Outstanding - Summary of Equity-Classified Common Stock Warrant Activity, for Warrants Other than Underlying Unexercised Overallotment Option Warrants (Detail) - Warrants [Member] - $ / shares		12 Months Ended
	Sep. 24, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class Of Warrant Or Right [Line Items]
Number of Shares, Outstanding, Beginning Balance		4,694,927	288,196
Number of Shares, Issued	762,438	41,189,726	4,526,731
Number of Shares, Exercised		(18,395,930)	(120,000)
Number of Shares, Expired		(4,474)
Number of Shares, Outstanding, Ending Balance		27,484,249	4,694,927	288,196
Weighted Average Exercise Price Per Share, Outstanding, Beginning Balance		$ 8.55	$ 78.86
Weighted Average Exercise Price Per Share, Issued		0.70	3.85
Weighted Average Exercise Price Per Share, Exercised		1.20	0.01
Weighted Average Exercise Price Per Share, Expired		953.06
Weighted Average Exercise Price Per Share, Outstanding, Ending Balance		$ 1.86	$ 8.55	$ 78.86
Average Remaining Contractual Term (in years)		4 years 7 months 6 days	4 years 4 months 24 days	4 years

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Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Corporate tax rate	21.00%		35.00%
Decrease in net deferred tax assets			$ 2,600,000
Net operating loss carryforwards	$ 13,900,000
Net operating loss carryforwards, expiration year	which will begin to expire in 2020
Percent of uncertain income tax positions recognized	50.00%	50.00%
Liability for unrecognized tax benefits	$ 0	$ 0
Percentage of change in ownership	50.00%
Period of change in ownership	3 years
Federal [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards	$ 54,900,000	$ 41,000,000
Net operating loss carryforwards, expiration year	carrying forward indefinitely
Federal [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Percentage of future taxable income offset by operating loss carryforwards	80.00%
Federal [Member] | Research Tax Credit Carryforward [Member]
Income Tax Contingency [Line Items]
Research and development tax credits	$ 366,000
Income tax research and development expiration year	begin to expire in 2020
California [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards, expiration year	which will begin to expire in 2020
Additional net operating loss carryforwards	$ 24,900,000
California [Member] | Research Tax Credit Carryforward [Member]
Income Tax Contingency [Line Items]
Research and development tax credits	$ 3,738,000

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Balance Sheet Details - Schedule of Fixed Assets and Accrued Liabilities (Detail) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Fixed Assets
Machinery and equipment	$ 2,857,538	$ 2,818,583
Furniture and office equipment	156,987	157,391
Computer equipment and software	1,552,891	1,437,408
Leasehold improvements	570,173	570,173
Financed equipment		2,573,955
Construction in process	625,038	116,640
Total fixed assets, gross	5,762,627	7,674,150
Less accumulated depreciation and amortization	(4,258,297)	(4,934,728)
Total fixed assets, net	1,504,330	2,739,422
Accrued Liabilities
Accrued payroll	298,855	255,426
Accrued vacation	622,792	535,682
Accrued bonuses	748,742	712,574
Accrued sales commissions	89,562	62,767
Current portion of deferred rent		158,342
Accrued other	220,253	203,602
Total accrued liabilities	$ 1,980,204	$ 1,928,393

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Summary of Significant Accounting Policies - Summary of Third-Party Payers That Represent More Than 10% of Total Net Revenues and Total Net Accounts Receivable and Their Related Percentage (Detail)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Customer Concentration Risk [Member] | Net Revenues [Member] | Medicare and Medicare Advantage [Member]
Concentration Risk [Line Items]
Concentration risk percentage	38.00%	39.00%
Customer Concentration Risk [Member] | Net Revenues [Member] | Blue Cross Blue Shield [Member]
Concentration Risk [Line Items]
Concentration risk percentage	21.00%	11.00%
Customer Concentration Risk [Member] | Net Revenues [Member] | United Healthcare [Member]
Concentration Risk [Line Items]
Concentration risk percentage	8.00%	17.00%
Credit Concentration Risk [Member] | Net Accounts Receivable [Member] | Medicare and Medicare Advantage [Member]
Concentration Risk [Line Items]
Concentration risk percentage	17.00%	17.00%
Credit Concentration Risk [Member] | Net Accounts Receivable [Member] | Blue Cross Blue Shield [Member]
Concentration Risk [Line Items]
Concentration risk percentage	26.00%	22.00%
Credit Concentration Risk [Member] | Net Accounts Receivable [Member] | United Healthcare [Member]
Concentration Risk [Line Items]
Concentration risk percentage	12.00%	15.00%

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2019

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

16. Commitments and Contingencies

Operating Leases

The Company leases office, laboratory, and warehouse space at its San Diego, California facility under a non-cancelable operating lease. The initial lease was for an eight-year term expiring in 2012. In November 2011, the Company extended the lease term through October 31, 2018 and expanded the original premises by 9,849 square feet. Under the amended lease, the landlord delivered the expanded premises in May 2013. In September 2013, the Company extended the lease term through July 31, 2020. See Lease footnote for further detail.

Purchase Commitment

In February 2016, the Company signed a firm, non-cancelable, and unconditional commitment in an aggregate amount of $1,062,500 with a vendor to purchase certain inventory items, payable in minimum quarterly amounts of $62,500 through May 2020. At December 31, 2019, approximately $91,000 remained outstanding under this purchase commitment.

Financed Equipment Maintenance and Sales Tax Obligations

During the years ended December 31, 2018 and 2019, total expense recorded in the Company’s statement of operations and comprehensive loss for sales tax and maintenance obligations associated with finance lease arrangements was approximately $101,000 and $122,000, respectively. At December 31, 2018 and 2019, approximately $69,000 and $73,000 of such sales tax and maintenance obligations incurred but not paid were recorded in accrued other liabilities in the Company’s balance sheet (see Note 6). Future payments totaling approximately $284,000 for sales tax and maintenance obligations associated with financed equipment were due under equipment financing arrangements at December 31, 2019, which will be expensed as incurred (see Note 8).

Legal Proceedings

In the normal course of business, the Company may be involved in legal proceedings or threatened legal proceedings. The Company is not party to any legal proceedings or aware of any threatened legal proceedings which are expected to have a material adverse effect on its financial condition, results of operations or liquidity.

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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Composition of Net Revenues Recognized Disaggregated by Source and Nature

The composition of the Company’s net revenues recognized during the years ended December 31, 2018 and 2019, disaggregated by source and nature, are as follows:

	For the year ended December 31,
	2018		2019
Net revenues from contracted payers*	$	1,348,383	$	2,071,961
Net revenues from non-contracted payers		1,693,739		3,044,249
Development services revenues		198,736		212,344
Kits and Blood Collection Tubes (BCT)		9,440		200,012
Total net revenues	$	3,250,298	$	5,528,566

*Includes Medicare and Medicare Advantage, as reimbursement amounts are fixed.

	For the year ended December 31,
	2018		2019
Net commercial revenues recognized upon delivery	$	3,042,122	$	5,116,210
Development services revenues recognized upon delivery		198,736		212,344
Kits and Blood Collection Tubes (BCT)		9,440		200,012
Total net revenues	$	3,250,298	$	5,528,566

Composition of Gross and Net Revenues Recognized

The composition of the Company’s gross and net revenues recognized during the years ended December 31, 2018 and 2019 is as follows:

	For the year ended December 31,
	2018			2019
Commercial revenues recognized upon delivery	$	12,495,709		$	18,895,657
Development services revenues recognized upon delivery		198,736			212,344
Kits and Blood Collection Tubes (BCT)		9,440			200,012
Total gross revenues		12,703,885			19,308,013
Provisions for contractual discounts		(3,937,993	)		(3,993,402	)
Provisions for aged non-patient receivables		(326,137	)		(922,151	)
Provisions for estimated patient receivables		(66,470	)		(7,342	)
Provisions for other payer-specific sales allowances		(5,122,987	)		(8,856,552	)
Net revenues	$	3,250,298		$	5,528,566

Summary of Activity in Gross and Net Accounts Receivable Balances and Reserves

A summary of activity in the Company’s gross and net accounts receivable balances, as well as corresponding reserves, during the year ended December 31, 2018 and 2019 is as follows:

	Balance at			Amounts			Settlements			Balance at
	December 31,			Recognized			Upon			December 31,
	2017			Upon Delivery			Adjudication			2018
Accounts receivable, gross	$	6,937,063		$	12,835,371		$	(11,889,832	)	$	7,882,602
Reserve for contractual discounts		(1,974,849	)		(3,214,615	)		3,011,989			(2,177,475	)
Reserve for aged non-patient receivables		(452,088	)		(994,542	)		880,682			(565,948	)
Reserve for estimated patient receivables		(88,120	)		(135,955	)		208,598			(15,477	)
Reserve for other payer-specific sales allowances		(3,228,580	)		(5,239,961	)		4,919,164			(3,549,377	)
Accounts receivable, net	$	1,193,426		$	3,250,298		$	(2,869,399	)	$	1,574,325

	Balance at			Amounts			Settlements			Balance at
	December 31,			Recognized			Upon			December 31,
	2018			Upon Delivery			Adjudication			2019
Accounts receivable, gross	$	7,882,602		$	19,001,873		$	(10,030,090	)	$	16,854,385
Reserve for contractual discounts		(2,177,475	)		(12,098,297	)		10,449,272			(3,826,500	)
Reserve for aged non-patient receivables		(565,948	)		(287,832	)		(646,247	)		(1,500,027	)
Reserve for estimated patient receivables		(15,477	)		(111,572	)		121,974			(5,075	)
Reserve for other payer-specific sales allowances		(3,549,377	)		(975,606	)		(3,470,722	)		(7,995,705	)
Accounts receivable, net	$	1,574,325		$	5,528,566		$	(3,575,813	)	$	3,527,078

Summary of Third-Party Payers That Represent More Than 10% of Total Net Revenues and Total Net Accounts Receivable and Their Related Percentage

The Company's third-party payers that represent more than 10% of total net revenues in any period presented, as well as their related net revenue amount as a percentage of total net revenues, during the years ended December 31, 2018 and 2019 were as follows:

	For the year ended December 31,
	2018			2019
Medicare and Medicare Advantage		39	%		38	%
Blue Cross Blue Shield		11	%		21	%
United Healthcare		17	%		8	%

The Company's third-party payers that represent more than 10% of total net accounts receivable, and their related net accounts receivable balance as a percentage of total net accounts receivable, at December 31, 2018 and 2019 were as follows:

	For the year ended December 31,
	2018			2019
Blue Cross Blue Shield		22	%		26	%
Medicare and Medicare Advantage		17	%		17	%
United Healthcare		15	%		12	%

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Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	2,133	4,417
Preferred stock, shares outstanding	2,133	4,417
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	54,738,485	4,629,174
Common stock, shares outstanding	54,738,485	4,629,174

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Statements of Cash Flows (Parenthetical) - USD ($)				3 Months Ended	12 Months Ended
	Dec. 11, 2019	Sep. 20, 2018	Aug. 13, 2018	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2019
Financed insurance premium through third party financing					$ 393,000	$ 488,000
Cancelled insurance premiums previously financed through third-parties, remaining principal outstanding balance					0
Fixed assets purchased under capital lease obligations					632,000	279,000
Purchases of fixed asset					$ 32,000	$ 25,000
Public offering, number of common stock and warrants issued		642,438
Issuance of warrants to purchase shares of common stock	1,925,000
Stock price		$ 3.285
Exercise price of unregistered warrants			$ 4.53	$ 0.405	$ 0.405
Class of warrant or rights, term			5 years		5 years
Issuance of unregistered warrants to purchase shares of common stock, grant date fair value	$ 6,400,000	$ 2,000,000	$ 8,400,000		$ 9,700,000
Offering fees and costs recorded within common stock issuance costs as an offset to additional paid in capital	$ 998,000	300,000	$ 1,400,000		$ 1,400,000
Aggregate units sold under right offering			11,587
Warrant exercisable for share of common stock			1
Gross proceeds from offering		$ 2,500,000	$ 11,600,000
Preferred stock converted to shares of common stock				504,764	504,764	1,584,571
Deemed dividend related to warrants down round provision				$ 21,829	$ 121,572	$ 636,370
Operating lease, right-of-use asset				729,330	729,330
Operating lease liability				842,452	842,452
Lease right-of-use assets				1,606,387	1,606,387
ASC Topic 842 [Member]
Fixed assets purchased under capital lease obligations					633,000	$ 279,000
Operating lease, right-of-use asset				1,930,000	1,930,000		$ 1,900,000
Operating lease liability				$ 2,201,000	$ 2,201,000		2,200,000
Lease right-of-use assets							1,400,000
Property, Plant and Equipment [Member] | ASC Topic 842 [Member]
Lease right-of-use assets							$ 1,400,000
Pre-funded Warrants [Member]
Issuance of warrants to purchase shares of common stock	5,400,000	120,000
Exercise price of unregistered warrants		$ 3.275
Change in exercise price of warrants		$ 0.01
Warrant [Member]
Aggregate warrants sold under right offering			2,549,140
Series A Preferred Stock [Member]
Shares issued in offering			11,587
Shares converted					2,284	7,170
Maximum [Member] | Pre-funded Warrants [Member]
Issuance of warrants to purchase shares of common stock		120,000
Follow-on Public Offering [Member]
Exercise price of unregistered warrants	$ 0.405	$ 3.16	$ 4.53	$ 0.405	$ 0.405
Class of warrant or rights, term	5 years	5 years	5 years		5 years
Private Placement [Member]
Exercise price of unregistered warrants		$ 3.16
Class of warrant or rights, term		5 years
Warrant exercisable for share of common stock		1
Over-allotment Option [Member] | Maximum [Member]
Shares issued in offering	3,690,000
Over-allotment Option [Member] | Maximum [Member] | Warrant [Member]
Shares issued in offering	3,690,000
Underwritten Public Offering [Member]
Issuance of warrants to purchase shares of common stock	24,600,000
Stock price	$ 0.405
Exercise price of unregistered warrants	$ 0.405
Class of warrant or rights, term	5 years
Shares issued in offering	19,200,000
Warrant exercisable for share of common stock	1
Proceeds from issuance of common stock, net of issuance costs	$ 8,900,000
Net cash proceeds from sale of securities	$ 8,900,000
Underwritten Public Offering [Member] | Pre-funded Warrants [Member]
Issuance of warrants to purchase shares of common stock	5,400,000
Exercise price of unregistered warrants	$ 0.395
Warrant exercisable for share of common stock	1
Change in exercise price of warrants	$ 0.01

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Balance Sheet Details

12 Months Ended

Dec. 31, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Balance Sheet Details

6. Balance Sheet Details

The following provides certain balance sheet details:

	December 31,			December 31,
	2018			2019
Fixed Assets
Machinery and equipment	$	2,818,583		$	2,857,538
Furniture and office equipment		157,391			156,987
Computer equipment and software		1,437,408			1,552,891
Leasehold improvements		570,173			570,173
Financed equipment		2,573,955			—
Construction in process		116,640			625,038
		7,674,150			5,762,627
Less accumulated depreciation and amortization		(4,934,728	)		(4,258,297	)
Total fixed assets, net	$	2,739,422		$	1,504,330
Accrued Liabilities
Accrued payroll	$	255,426		$	298,855
Accrued vacation		535,682			622,792
Accrued bonuses		712,574			748,742
Accrued sales commissions		62,767			89,562
Current portion of deferred rent		158,342			—
Accrued other		203,602			220,253
Total accrued liabilities	$	1,928,393		$	1,980,204

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Stock-Based Compensation

12 Months Ended

Dec. 31, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

10. Stock-Based Compensation

Equity Incentive Plans

The Company maintains two equity incentive plans: The Amended and Restated 2013 Equity Incentive Plan, or the 2013 Plan, and the 2007 Equity Incentive Plan, or the 2007 Plan. The 2013 Plan includes a provision that shares available for grant under the Company’s 2007 Plan become available for issuance under the 2013 Plan and are no longer available for issuance under the 2007 Plan.

At the Company’s annual meeting of stockholders held on June 28, 2018, the Company’s stockholders approved amendments to the 2013 Plan, which included an increase in the number of non-inducement shares of common stock authorized for issuance under the 2013 Plan by 146,666 shares. At the Company’s annual meeting of stockholders held on June 17, 2019, the Company’s stockholders approved additional amendments to the 2013 Plan including the increase in the number of non-inducement shares of common stock authorized for issuance under the 2013 Plan by 2,800,000 shares.  As of December 31, 2019, 124,211 shares of the Company’s common stock were authorized exclusively for the issuance of stock awards to employees who have not previously been an employee or director of the Company, except following a bona fide period of non-employment, as an inducement material to the individual’s entering into employment with the Company, as defined under applicable Nasdaq Listing Rules.

As of December 31, 2019, under all plans, a total of 3,064,098 non-inducement shares were authorized for issuance, 2,731,962 shares had been issued with 2,615,503 non-inducement stock options and restricted stock units, or RSUs, underlying outstanding awards, and 332,136 non-inducement shares were available for grant. As of December 31, 2019, 118,368 inducement shares had been issued under the 2013 Plan, with 117,534 inducement stock options and RSUs underlying outstanding awards and 0 inducement shares available for grant.

Stock Options

Non-performance options granted under either plan vest over a maximum period of four years and expire ten years from the date of grant. Non-performance options generally vest either (i) over four years, 25% on the one-year anniversary of the date of grant and monthly thereafter for the remaining three years; or (ii) over four years, monthly vesting beginning month-one after the grant and monthly thereafter.

The fair value of stock options is determined on the date of grant using the Black-Scholes valuation model. For non-performance awards, such value is recognized as expense over the requisite service period, net of estimated forfeitures, using the straight-line method. The amount and timing of compensation expense recognized for performance awards is based on management’s estimate of the most likely outcome and when the achievement of the performance objectives is probable. The determination of the fair value of stock options is affected by the Company’s stock price, as well as assumptions regarding a number of complex and subjective variables. The volatility assumption is based on a combination of the historical volatility of the Company’s common stock and the volatilities of similar companies over a period of time equal to the expected term of the stock options. The volatilities of similar companies are used in conjunction with the Company’s historical volatility because of the lack of sufficient relevant history for the Company’s common stock equal to the expected term. The expected term of employee stock options represents the weighted-average period the stock options are expected to remain outstanding. The expected term assumption is estimated based primarily on the options’ vesting terms and remaining contractual life and employees’ expected exercise and post-vesting employment termination behavior. The risk-free interest rate assumption is based upon observed interest rates on the grant date appropriate for the term of the employee stock options. The dividend yield assumption is based on the expectation of no future dividend payouts by the Company.

The assumptions used in the Black-Scholes pricing model for options granted during the years ended December 31, 2018 and 2019 are as follows:

	2018	2019
Stock and exercise prices	$0.86 - $6.00	$0.29 - $1.03
Expected dividend yield	0.00%	0.00%
Discount rate-bond equivalent yield	2.50% - 3.02%	1.58% - 2.55%
Expected life (in years)	4.00 - 5.96	4.00 - 5.96
Expected volatility	100% - 120%	128% - 156%

Using the assumptions described above, with stock and exercise prices being equal on date of grant, the weighted-average estimated fair value of options granted in 2018 and 2019 were approximately $1.75 and $0.91 per share, respectively.

A summary of stock option activity for the years ended December 31, 2018 and 2019 is as follows:

	Number of Shares			Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term in Years
Outstanding at December 31, 2017		81,643		$	113.68		8.80
Granted		142,587		$	2.20
Exercised		—			—
Cancelled/forfeited/expired		(28,410	)	$	57.96
Outstanding at December 31, 2018		195,820		$	41.41		9.20
Granted		2,676,229		$	0.91
Exercised		—			—
Cancelled/forfeited/expired		(140,026	)	$	3.70
Outstanding at December 31, 2019		2,732,023		$	3.66		9.25
Vested and unvested expected to vest, December 31, 2019		2,655,129		$	3.74		9.25

The intrinsic values of options outstanding, options exercisable, and options vested and unvested expected to vest at December 31, 2018 and 2019 were each zero.

Restricted Stock

The fair value of RSUs awarded under either plan is determined by the closing price of the Company’s common stock on the date of grant. For non-performance RSUs, such value is recognized as expense over the requisite service period, net of estimated forfeitures, using the straight-line method. The amount and timing of compensation expense recognized for RSUs is based on management’s estimate of the most likely outcome and when the achievement of the performance objectives is probable.

A summary of RSU activity during 2018 and 2019 is as follows:

	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2017		12,030		$	56.10
Granted		—		$	0
Vested and issued		(5,835	)	$	45.00
Forfeited		(5,835	)	$	45.00
Outstanding at December 31, 2018		360		$	415.80
Granted		—		$	—
Vested and issued		—		$	—
Forfeited		—		$	—
Outstanding at December 31, 2019		360		$	415.80
Vested, December 31, 2019		360		$	415.80

At December 31, 2019, the intrinsic values of RSUs outstanding was approximately $100. Of the 360 RSUs outstanding at December 31, 2019, all were fully vested.

Stock-based Compensation Expense

The following table presents the effects of stock-based compensation related to equity awards to employees and nonemployees on the statement of operations during the periods presented:

	Years Ended December 31,
	2018			2019
Stock Options
Cost of revenues	$	46,708		$	77,495
Research and development expenses		133,525			127,844
General and administrative expenses		300,433			517,324
Sales and marketing expenses		78,321			146,916
Total expenses related to stock options		558,987			869,579
RSUs
Cost of revenues		(18,802	)		—
Research and development expenses		13,576			—
General and administrative expenses		54,302			—
Sales and marketing expenses		15,349			—
Total stock-based compensation	$	623,412		$	869,579

Stock-based compensation expense was recorded net of estimated forfeitures of 0% - 8% per annum during the years ended December 31, 2018 and 2019. As of December 31, 2019, total unrecognized share-based compensation expense related to unvested stock options and RSUs, adjusted for estimated forfeitures, was approximately $2,222,000, and such amount is expected to be recognized over a weighted-average period of approximately 3.11 years.

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Summary of Significant Accounting Policies - Composition of Net Revenues Recognized Disaggregated by Source (Detail) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Net revenues		$ 1,783,742	$ 1,529,262	$ 1,191,323	$ 1,024,239	$ 859,526	$ 761,591	$ 822,238	$ 806,943	$ 5,528,566	$ 3,250,298
Commercial Revenues [Member] | Contracted Payers [Member]
Disaggregation Of Revenue [Line Items]
Net revenues	[1]									2,071,961	1,348,383
Commercial Revenues [Member] | Non-Contracted Payers [Member]
Disaggregation Of Revenue [Line Items]
Net revenues										3,044,249	1,693,739
Development Services Revenues [Member]
Disaggregation Of Revenue [Line Items]
Net revenues										212,344	198,736
Kits and Blood Collection Tubes [Member]
Disaggregation Of Revenue [Line Items]
Net revenues										$ 200,012	$ 9,440

[1] Includes Medicare and Medicare Advantage, as reimbursement amounts are fixed.

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Provision for Income Taxes

For the years ended December 31, 2018 and 2019, the provision for income taxes was calculated as follows:

	For the years ended December 31,
	2018		2019
Current:
Federal	$	—	$	—
State		1,886		—
Total		1,886		—
Deferred
Federal		—		—
State		—		—
Total		—		—
Provision for income tax	$	1,886	$	—

Reconciles of Income Taxes Computed at Federal Statutory Rate and Provision for Income Taxes

The following table reconciles income taxes computed at the federal statutory rate and the Company’s provision for income taxes:

	For the years ended December 31,
	2018			2019
Income tax at statutory rate	$	(5,159,881	)	$	(5,278,232	)
Change in federal tax rate		—			—
State liability		(670,015	)		(764,997	)
Permanent items		118,959			103,617
Stock compensation		11,128			174,128
Warrant inducement		—			384,534
Expiration of net operating losses		—			35,487
Research and development credit		(272,314	)		(359,765	)
State rate change		(132,855	)		388
Estimated section 382 limitation		—			325,046
Return to provision		8,386			(4,296	)
Other		19,420			(83,353	)
Valuation allowance		6,079,058			5,467,443
Provision for income tax	$	1,886		$	—

Summary of Deferred Tax Assets

The tax effects of carryforwards and other temporary differences that give rise to deferred tax assets consist of the following:

	For the year ended December 31,
	2018			2019
Estimated net operating loss carryforward	$	9,229,174		$	13,118,923
Estimated research and development credits		2,958,710			3,318,475
Accruals and other		2,864,028			4,536,147
Deferred rent		64,628			—
Operating lease liability		—			205,542
		15,116,540			21,179,087
Right-of-use asset		—			(569,870	)
Gross deferred tax liabilities		—			(569,870	)
Less valuation allowance		(15,116,540	)		(20,609,217	)
Net deferred tax assets	$	—		$	—

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Leases (Tables)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Schedule of Right-Of-Use Lease Assets

The following schedule sets forth the components of right-of-use lease assets as of December 31, 2018 and 2019 as follows:

	December 31,		December 31,
	2018		2019
Lease right-of-use assets:
Operating	$	—	$	729,330
Finance		—		1,606,387
Total	$	—	$	2,335,717

Schedule of Current Portion of Operating and Finance Lease Liabilities

The following schedule sets forth the current portion of operating and finance lease liabilities as of December 31, 2018 and 2019:

	December 31,		December 31,
	2018		2019
Current  portion of lease liability:
Operating	$	—	$	842,452
Finance		—		724,329
Total	$	—	$	1,566,781

Schedule of Long-Term Portion of Operating and Finance Lease Liabilities

The following schedule sets forth the long-term portion of operating and finance lease liabilities as of December 31, 2018 and 2019:

	December 31,		December 31,
	2018		2019
Long-term portion of lease liability:
Operating	$	—	$	—
Finance		—		973,189
Total	$	—	$	973,189

Schedule of Lease Expenses

The following schedule represents the components of lease expense for the years ended December 31, 2018 and 2019:

	For the years ended December 31,
	2018		2019
Lease cost
Finance lease cost
Amortization of right-of-use assets	$	—	$	470,486
Interest on lease liabilities		—		249,984
Operating lease cost		—		1,272,024
Total	$	—	$	1,992,494

Schedule of Remaining Future Minimum Lease Payments for Finance and Operating Leases

The following schedule sets forth the remaining future minimum lease payments outstanding under finance and operating leases, as well as corresponding remaining sales tax and maintenance obligation payments that are expensed as incurred and due within each respective year ending December 31, as well as the present value of the total amount of the remaining minimum lease payments, as of December 31, 2019:

	Finance					Operating
	Minimum			Maintenance and		Minimum
	Lease			Sales Tax Obligation		Lease
	Payments			Payments		Payments
2020	$	779,049		$	90,260	$	855,136
2021		531,846			69,053		—
2022		408,396			57,499		—
2023		284,380			58,098		—
Thereafter		69,674			9,536		—
Total payments		2,073,345			284,446		855,136
Less amount representing interest		(375,827	)		—		(12,684	)
Present value of payments	$	1,697,518		$	284,446	$	842,452

Supplemental Cash Flow Information Related to Operating and Finance Leases

The following schedule sets forth supplemental cash flow information related to operating and finance leases as of December 31, 2019:

	For the year ended December 31, 2019
Other information
Operating cash flows from finance leases	$	249,984
Operating cash flows from operating leases	$	1,430,366
Financing cash flows from finance leases	$	539,415

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Leases - Schedule of Long-Term Portion of Operating and Finance Lease Liabilities (Detail)	Dec. 31, 2019 USD ($)
Long-term portion of lease liability:
Finance	$ 973,189
Total	$ 973,189

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Supplier Financings - Additional Information (Detail) - Financing Agreements With Supplier [Member] - Laboratory Software [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Financing agreement, due period	1 year	1 year
Remaining balance under financing agreement	$ 0	$ 0
Minimum [Member]
Debt Instrument [Line Items]
Interest rate	4.40%	4.40%
Maximum [Member]
Debt Instrument [Line Items]
Interest rate	6.20%	6.20%

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Stock-Based Compensation - Summary of RSU Activity (Detail) - RSUs [Member] - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Outstanding, Beginning Balance	360	12,030
Number of Shares, Granted	0
Number of share, Vested and issued	0	(5,835)
Number of share, Forfeited	0	(5,835)
Number of Shares Outstanding, Ending Balance	360	360
Number of Shares, Vested	360
Weighted Average Grand Date Fair Value, Outstanding, Beginning Balance	$ 415.80	$ 56.10
Weighted Average Grand Date Fair Value, Granted	0	0
Weighted Average Grand Date Fair Value,Vested and issued	0	45.00
Weighted Average Grand Date Fair Value, Forfeited	0	45.00
Weighted Average Grand Date Fair Value, Outstanding, Ending Balance	415.80	$ 415.80
Weighted Average Grant Date Fair Value, Vested	$ 415.80

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Subsequent Events - Additional Information (Detail) - USD ($)								1 Months Ended		12 Months Ended
	Mar. 04, 2020	Mar. 02, 2020	Mar. 19, 2019	Feb. 12, 2019	Jan. 18, 2019	Aug. 13, 2018	Jan. 30, 2018	Feb. 29, 2020	May 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 11, 2019	Sep. 20, 2018
Subsequent Event [Line Items]
Proceeds from warrant exercise inducement, net										$ 2,337,298
Proceeds from exercise of common stock warrants										$ 2,513,173	$ 1,200
Issuance of warrants to purchase shares of common stock												1,925,000
Stock price			$ 1.37		$ 2.25								$ 3.285
Class of warrant or rights, term			5 years 6 months			5 years				5 years
Proceeds from issuance of common stock, net of issuance costs			$ 7,600,000		$ 2,000,000
Shares issued in offering			5,950,000		990,000
Warrant [Member]
Subsequent Event [Line Items]
Proceeds from exercise of common stock warrants									$ 2,500,000
Class of warrant or rights, term							5 years
Over-allotment Option [Member] | Warrant [Member]
Subsequent Event [Line Items]
Shares issued in offering				915,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Stock price	$ 0.41	$ 0.40
Proceeds from issuance of common stock, net of issuance costs	$ 6,100,000	$ 8,500,000
Shares issued in offering	16,000,000	23,000,000
Subsequent Event [Member] | Warrant [Member]
Subsequent Event [Line Items]
Issuance of warrants to purchase shares of common stock								6,927,258
Stock price								$ 0.3495
Class of warrant or rights, term								5 years
Subsequent Event [Member] | Over-allotment Option [Member] | Warrant [Member]
Subsequent Event [Line Items]
Proceeds from exercise of common stock warrants								$ 700,000
February 2020 Warrant Exercise Inducement Offering [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Proceeds from warrant exercise inducement, net								$ 2,200,000

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Leases - Additional Information (Detail)			1 Months Ended				12 Months Ended
	Feb. 01, 2019 USD ($)	Jan. 31, 2019 USD ($) mo	Dec. 31, 2019 USD ($) mo	Sep. 30, 2019 USD ($) mo	Aug. 31, 2019 USD ($) mo	Jul. 31, 2019 USD ($) mo	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 01, 2019 USD ($)
Leases [Line Items]
Finance lease right-of-use assets			$ 1,606,387				$ 1,606,387
Financed equipment								$ 2,573,955
Fixed asset purchases as right-of-use asset finance lease obligations							632,000	279,000
Funds from finance lease commitment	$ 149,000			$ 89,000	$ 245,000	$ 100,000
Finance lease transaction, frequency of payments		monthly		monthly	monthly	monthly
Finance lease transaction, number of installments payments | mo		36		60	36	48
Finance lease transaction, monthly installments of principal and interest payments		$ 5,013		$ 1,770	$ 8,253	$ 2,706
Finance lease transaction, total amount to be repaid		$ 180,000		$ 106,000	$ 297,000	$ 130,000
Finance lease transaction, commitment period		2022-02		2024-09	2022-08	2023-05
Operating lease monthly payments							1,430,366
Operating lease, right-of-use asset			729,330				729,330
Operating lease liability			$ 842,452				$ 842,452
Finance lease, weighted average remaining lease term			3 years 7 days				3 years 7 days
Operating lease, weighted average remaining lease term			7 months 2 days				7 months 2 days
Finance lease, weighted average discount rate, percent			21.93%				21.93%
Operating lease, weighted average discount rate, percent			4.50%				4.50%
First Finance Lease [Member]
Leases [Line Items]
Funds from finance lease commitment			$ 28,000
Finance lease transaction, frequency of payments			monthly
Finance lease transaction, number of installments payments | mo			60
Finance lease transaction, monthly installments of principal and interest payments			$ 597
Finance lease transaction, total amount to be repaid			36,000				$ 36,000
Second Finance Lease [Member]
Leases [Line Items]
Funds from finance lease commitment			$ 22,000
Finance lease transaction, frequency of payments			monthly
Finance lease transaction, number of installments payments | mo			48
Finance lease transaction, monthly installments of principal and interest payments			$ 563
Finance lease transaction, total amount to be repaid			27,000				27,000
ASC Topic 842 [Member]
Leases [Line Items]
Finance lease right-of-use assets									$ 1,400,000
Financed equipment			3,125,000				3,125,000	2,574,000
Accumulated depreciation related to financed equipment			1,606,000				1,606,000	1,135,000
Total depreciation expense related to equipment under finance leases							454,000	376,000
Fixed asset purchases as right-of-use asset finance lease obligations							$ 633,000	$ 279,000
Operating lease transaction, frequency of payments							monthly cash payment
Operating lease monthly payments							$ 120,000
Operating lease term							Jul. 31, 2020
Operating lease, right-of-use asset			1,930,000				$ 1,930,000		1,900,000
Operating lease liability			$ 2,201,000				$ 2,201,000		$ 2,200,000
Operating lease incremental borrowing rate									4.50%
Minimum [Member] | ASC Topic 842 [Member]
Leases [Line Items]
Financed equipment useful life			5 years				5 years
Maximum [Member] | ASC Topic 842 [Member]
Leases [Line Items]
Financed equipment useful life			7 years				7 years

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Fair Value Measurements - Additional Information (Detail) - USD ($)								12 Months Ended
	Dec. 11, 2019	May 30, 2019	Mar. 19, 2019	Feb. 12, 2019	Sep. 20, 2018	Aug. 13, 2018	Jan. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Feb. 28, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fixed asset purchases as right-of-use asset finance lease obligations								$ 632,000	$ 279,000
Estimated grant date fair value of warrants	$ 0.24	$ 1.18	$ 1.01	$ 0.95	$ 2.57	$ 3.30	$ 8.82
Issuance of unregistered warrants to purchase shares of common stock, grant date fair value	$ 6,400,000	$ 1,800,000	$ 6,000,000	$ 6,800,000	$ 2,000,000	$ 8,400,000	$ 9,700,000	$ 9,700,000
Exercise price of unregistered warrants			$ 1.25	$ 1.20		$ 4.53	$ 1.20	$ 0.405		$ 1.20
Class of warrant or rights, term			5 years 6 months			5 years		5 years
Issuance of warrants to purchase shares of common stock	1,925,000
Common stock warrants outstanding, intrinsic value								$ 0	$ 0
Pre-funded Warrants [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Exercise price of unregistered warrants					$ 3.275
Issuance of warrants to purchase shares of common stock	5,400,000				120,000
Common stock warrants outstanding, intrinsic value	$ 1,400,000				$ 350,000
Follow-on Public Offering [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Issuance of unregistered warrants to purchase shares of common stock, grant date fair value							$ 9,700,000
Exercise price of unregistered warrants	$ 0.405		$ 1.25	$ 1.20	$ 3.16	$ 4.53	$ 0.405	$ 0.405
Class of warrant or rights, term	5 years		5 years 6 months	5 years	5 years	5 years	5 years	5 years
Warrant Inducement Transaction [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Exercise price of unregistered warrants		$ 1.31
Class of warrant or rights, term		5 years 6 months
Maximum [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Issuance of unregistered warrants to purchase shares of common stock	26,527,500	1,547,226	5,950,000	7,165,000	762,438	2,549,140	1,095,153
Maximum [Member] | Pre-funded Warrants [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Issuance of warrants to purchase shares of common stock					120,000
Maximum [Member] | Follow-on Public Offering [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Issuance of warrants to purchase shares of common stock				6,250,000			1,095,153
Estimated Fair Value Measurements, Nonrecurring [Member] | Level 3 Inputs [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fixed asset purchases as right-of-use asset finance lease obligations								$ 632,000

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Summary of Significant Accounting Policies - Composition of Gross and Net Revenues Recognized (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Total gross revenues									$ 19,308,013	$ 12,703,885
Provisions for contractual discounts									(3,993,402)	(3,937,993)
Provisions for aged non-patient receivables									(922,151)	(326,137)
Provisions for estimated patient receivables									(7,342)	(66,470)
Provisions for other payer-specific sales allowances									(8,856,552)	(5,122,987)
Net revenues	$ 1,783,742	$ 1,529,262	$ 1,191,323	$ 1,024,239	$ 859,526	$ 761,591	$ 822,238	$ 806,943	5,528,566	3,250,298
Commercial Revenues [Member]
Summary Of Significant Accounting Policies [Line Items]
Total gross revenues									18,895,657	12,495,709
Development Services Revenues [Member]
Summary Of Significant Accounting Policies [Line Items]
Total gross revenues									212,344	198,736
Net revenues									212,344	198,736
Kits and Blood Collection Tubes [Member]
Summary Of Significant Accounting Policies [Line Items]
Total gross revenues									200,012	9,440
Net revenues									$ 200,012	$ 9,440

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Net Loss per Common Share - Schedule of Anti-Dilutive Securities Excluded from Computations of Diluted Weighted-Average Shares (Detail) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common share equivalents	30,688,025	5,867,281
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common share equivalents	471,393	976,157
Preferred Warrants Outstanding [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common share equivalents		17
Common Warrants Outstanding [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common share equivalents	27,484,249	4,694,927
RSUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common share equivalents	360	360
Common Options Outstanding [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common share equivalents	2,732,023	195,820

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Income Taxes - Reconciles of Income Taxes Computed at Federal Statutory Rate and Provision for Income Taxes (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax at statutory rate	$ (5,278,232)	$ (5,159,881)
State liability	(764,997)	(670,015)
Permanent items	103,617	118,959
Stock compensation	174,128	11,128
Warrant inducement	384,534
Expiration of net operating losses	35,487
Research and development credit	(359,765)	(272,314)
State rate change	388	(132,855)
Estimated section 382 limitation	325,046
Return to provision	(4,296)	8,386
Other	(83,353)	19,420
Valuation allowance	$ 5,467,443	6,079,058
Provision for income tax		$ 1,886

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Income Taxes

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Income Taxes

14. Income Taxes

On December 22, 2017, the President of the United States signed into law legislation, informally titled the Tax Cuts and Jobs Act of 2017, that significantly revises the Internal Revenue Code of 1986, as amended, or the Code. The Act amends the Code to reduce tax rates and modify policies, credits, and deductions for individuals and businesses.For businesses, the Act reduces the corporate tax rate from a maximum of 35% to a flat 21% rate. The rate reduction was effective on January 1, 2018. As a result of the rate reduction, the Company has reduced the deferred tax asset balance as of December 31, 2017 by approximately $2.6 million. Due to the Company's full valuation allowance position, the Company has also reduced the valuation allowance by the same amount.

As of December 31, 2019, the Company completed its accounting for the tax effects of the enactment of the Tax Cuts and Jobs Act of 2017 which resulted in immaterial adjustments to provisional estimates, offset by a full valuation allowance.

For the years ended December 31, 2018 and 2019, the provision for income taxes was calculated as follows:

	For the years ended December 31,
	2018		2019
Current:
Federal	$	—	$	—
State		1,886		—
Total		1,886		—
Deferred
Federal		—		—
State		—		—
Total		—		—
Provision for income tax	$	1,886	$	—

The following table reconciles income taxes computed at the federal statutory rate and the Company’s provision for income taxes:

	For the years ended December 31,
	2018			2019
Income tax at statutory rate	$	(5,159,881	)	$	(5,278,232	)
Change in federal tax rate		—			—
State liability		(670,015	)		(764,997	)
Permanent items		118,959			103,617
Stock compensation		11,128			174,128
Warrant inducement		—			384,534
Expiration of net operating losses		—			35,487
Research and development credit		(272,314	)		(359,765	)
State rate change		(132,855	)		388
Estimated section 382 limitation		—			325,046
Return to provision		8,386			(4,296	)
Other		19,420			(83,353	)
Valuation allowance		6,079,058			5,467,443
Provision for income tax	$	1,886		$	—

Deferred income taxes are provided for temporary differences in recognizing certain income and expense items for financial and tax reporting purposes. The deferred tax assets consisted primarily of the income tax benefits from estimated net operating loss carryforwards, deferred rent, and estimated research and development credits. Valuation allowances have been recorded to fully offset deferred tax assets at December 31, 2018 and 2019, as it is more likely than not that the assets will not be utilized.

At December 31, 2019, the Company had estimated federal net operating loss carryforwards of approximately $54.9 million with $41.0 million net operating losses generated after December 31, 2017 carrying forward indefinitely and total estimated net operating loss carryforwards of approximately $13.9 million which will begin to expire in 2020 and may generally be used to offset up to 80% of future taxable income. The Company has additional state net operating losses of $24.9 million, which will begin to expire in 2020.Additionally, at December 31, 2019, the Company had estimated research and development tax credits of approximately $366,000 and $3,738,000 for federal and California purposes, respectively. The estimated federal research and development tax credits will begin to expire in 2020. The California research and development tax credits do not expire.

For the taxable years ended December 31, 2018 and 2019, the Company has evaluated the various tax positions reflected in its income tax returns for both federal and state jurisdictions, to determine if the Company has any uncertain tax positions on the historical tax returns. The Company recognizes the impact of an uncertain tax position on an income tax return at the largest amount that the relevant taxing authority is more-likely-than not to sustain upon audit. The Company does not recognize uncertain income tax positions if they have less than 50 percent likelihood of being sustained. Based on this assessment, the Company believes there are no tax positions for which a liability for unrecognized tax benefits should be recorded as of December 31, 2018 or 2019. The Company is subject to U.S. federal income tax as well as income tax in multiple state jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal income tax examinations for 2015 and before, state and local income tax examinations 2014 and before. However, to the extent allowed by law, the tax authorities may have the right to examine prior periods where net operating losses were generated and carried forward and make adjustments up to the amount of the net operating loss carryforward amount. The Company’s policy is to recognize interest and penalties related to income tax matters in income tax expense. Due to the existence of the valuation allowance, future changes in unrecognized tax benefits will not impact the Company’s effective tax rate. The Company is currently not under examination by any taxing authorities and does not believe its unrecognized tax benefits will significantly change in the next twelve months.

The tax effects of carryforwards and other temporary differences that give rise to deferred tax assets consist of the following:

	For the year ended December 31,
	2018			2019
Estimated net operating loss carryforward	$	9,229,174		$	13,118,923
Estimated research and development credits		2,958,710			3,318,475
Accruals and other		2,864,028			4,536,147
Deferred rent		64,628			—
Operating lease liability		—			205,542
		15,116,540			21,179,087
Right-of-use asset		—			(569,870	)
Gross deferred tax liabilities		—			(569,870	)
Less valuation allowance		(15,116,540	)		(20,609,217	)
Net deferred tax assets	$	—		$	—

Utilization of the estimated domestic net operating loss and research and development tax credit carryforwards may be subject to a substantial annual limitation due to ownership change limitations that may have occurred or that could occur in the future, as required by Sections 382 and 383 of the Code, as well as similar state provisions. These ownership changes may limit the amount of estimated net operating loss and research and development credit carryforwards that can be utilized annually to offset future taxable income and tax, respectively. In general, an “ownership change” as defined by Section 382 of the Code results from a transaction or series of transactions over a three-year period resulting in an ownership change of more than 50 percentage points by value of the outstanding stock of a company by certain stockholders. Since the Company’s formation, the Company has raised capital through the issuance of capital stock on several occasions which on its own or combined with the purchasing stockholders’ subsequent disposition of those shares, likely resulted in such an ownership change, or could result in an ownership change in the future.

Upon the occurrence of an ownership change under Sections 382 and 383 of the Code as outlined above, utilization of the estimated net operating loss and research and development credit carryforwards are subject to an annual limitation, which is determined by first multiplying the value of the Company’s stock at the time of the ownership change by the applicable long-term, tax-exempt rate, which could be subject to additional adjustments, as required. Any limitation may result in expiration of a portion of the estimated net operating loss or research and development tax credit carryforwards before utilization. The Company has not yet completed an analysis to determine whether an ownership change has occurred, however, the Company believes ownership changes likely occurred in each year from 2015 through 2019. As a result, the Company has estimated that the use of its net operating loss carryforwards is limited and has disclosed in the table above only the amounts it estimates could be used in the future, which remain fully offset by a valuation allowance to reduce the net asset to zero.

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Subsequent Events

12 Months Ended

Dec. 31, 2019

Subsequent Events [Abstract]

Subsequent Events

18. Subsequent Events

In February 2020, the Company received net proceeds of approximately $2.2 million related to the February 2020 Warrant Exercise Inducement offering as well as an additional $700,000 from the underwriter exercising its overallotment warrants from the December 2019 underwritten financing transaction.  In addition, as inducement for these exercises, the Company issued 6,927,258 warrants to purchase shares of common stock at $0.3495 per share.  The warrants are exercisable on the six-month anniversary of issuance and expire in five years from the date first exercisable.

On March 2, 2020, the Company received net cash proceeds of approximately $8.5 million from a registered direct offering to certain institutional investors of 23,000,000 shares of common stock at a negotiated purchase price of $0.40 per share.

On March 4, 2020, the Company received net cash proceeds of approximately $6.1 million from a registered direct offering to certain institutional investors of 16,000,000 shares of common stock at a negotiated purchase price of $0.41 per share.

On March 11, 2020 the World Health Organization declared the novel strain of coronavirus (COVID-19) a global pandemic and recommended containment and mitigation measures worldwide.  In addition, as we are located in California, we are currently under a shelter in place mandate and many of our clients worldwide are similarly impacted.  As a healthcare provider, we are allowed to remain open in compliance with the shelter in place mandate and continue to provide critical information for patients diagnosed with cancer. However, the global outbreak of the COVID-19 coronavirus continues to rapidly evolve, and the extent to which the COVID-19 coronavirus may impact our business will depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the ultimate geographic spread of the disease, the duration of the outbreak, travel restrictions and social distancing in the United States and other countries, business closures or business disruptions, and the effectiveness of actions taken in the United States and other countries to contain and treat the disease.  While we are still receiving specimens from clients on a daily basis, we anticipate a potential slowdown in volume as many clinic visits are being re-scheduled and delayed.  We are continuing to vigilantly monitor the situation with our primary focus on the health and safety of our employees and clients.

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Balance Sheet Details (Tables)

12 Months Ended

Dec. 31, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Schedule of Fixed Assets and Accrued Liabilities

The following provides certain balance sheet details:

	December 31,			December 31,
	2018			2019
Fixed Assets
Machinery and equipment	$	2,818,583		$	2,857,538
Furniture and office equipment		157,391			156,987
Computer equipment and software		1,437,408			1,552,891
Leasehold improvements		570,173			570,173
Financed equipment		2,573,955			—
Construction in process		116,640			625,038
		7,674,150			5,762,627
Less accumulated depreciation and amortization		(4,934,728	)		(4,258,297	)
Total fixed assets, net	$	2,739,422		$	1,504,330
Accrued Liabilities
Accrued payroll	$	255,426		$	298,855
Accrued vacation		535,682			622,792
Accrued bonuses		712,574			748,742
Accrued sales commissions		62,767			89,562
Current portion of deferred rent		158,342			—
Accrued other		203,602			220,253
Total accrued liabilities	$	1,928,393		$	1,980,204

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Fair Value Measurements - Assumptions Used for Determining Fair Values of Common Stock Warrants (Detail)	Dec. 31, 2019 $ / shares	Mar. 19, 2019 $ / shares	Jan. 18, 2019 $ / shares	Sep. 20, 2018 $ / shares
Warrant Fair Value Black Scholes Method [Line Items]
Beginning stock price		$ 1.37	$ 2.25	$ 3.285
January 30, 2018 Offering [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Beginning stock price	$ 10.17
January 30, 2018 Offering [Member] | Exercise Price [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	15.00
January 30, 2018 Offering [Member] | Expected Dividend Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	0.00
January 30, 2018 Offering [Member] | Discount Rate-Bond Equivalent Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	2.48
January 30, 2018 Offering [Member] | Expected Life [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Expected life (in years)	5 years
January 30, 2018 Offering [Member] | Expected Volatility [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	99.00
August 13, 2018 Rights Offering [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Beginning stock price	$ 3.89
August 13, 2018 Rights Offering [Member] | Exercise Price [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	4.53
August 13, 2018 Rights Offering [Member] | Expected Dividend Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	0.00
August 13, 2018 Rights Offering [Member] | Discount Rate-Bond Equivalent Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	2.75
August 13, 2018 Rights Offering [Member] | Expected Life [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Expected life (in years)	5 years
August 13, 2018 Rights Offering [Member] | Expected Volatility [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	128.69
September 20, 2018 Offering [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Beginning stock price	$ 2.92
September 20, 2018 Offering [Member] | Exercise Price [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	3.16
September 20, 2018 Offering [Member] | Expected Dividend Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	0.00
September 20, 2018 Offering [Member] | Discount Rate-Bond Equivalent Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	2.77
September 20, 2018 Offering [Member] | Expected Life [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Expected life (in years)	5 years 6 months
September 20, 2018 Offering [Member] | Expected Volatility [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	130.7
February 12, 2019 Offering [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Beginning stock price	$ 1.05
February 12, 2019 Offering [Member] | Exercise Price [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	1.20
February 12, 2019 Offering [Member] | Expected Dividend Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	0.00
February 12, 2019 Offering [Member] | Discount Rate-Bond Equivalent Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	2.49
February 12, 2019 Offering [Member] | Expected Life [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Expected life (in years)	5 years
February 12, 2019 Offering [Member] | Expected Volatility [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	147.7
March 19, 2019 Offering [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Beginning stock price	$ 1.12
March 19, 2019 Offering [Member] | Exercise Price [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	1.25
March 19, 2019 Offering [Member] | Expected Dividend Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	0.00
March 19, 2019 Offering [Member] | Discount Rate-Bond Equivalent Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	2.44
March 19, 2019 Offering [Member] | Expected Life [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Expected life (in years)	5 years 6 months
March 19, 2019 Offering [Member] | Expected Volatility [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	140.0
May 30, 2019 Warrant Inducement Transaction [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Beginning stock price	$ 1.29
May 30, 2019 Warrant Inducement Transaction [Member] | Exercise Price [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	1.31
May 30, 2019 Warrant Inducement Transaction [Member] | Expected Dividend Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	0.00
May 30, 2019 Warrant Inducement Transaction [Member] | Discount Rate-Bond Equivalent Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	2.05
May 30, 2019 Warrant Inducement Transaction [Member] | Expected Life [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Expected life (in years)	5 years 6 months
May 30, 2019 Warrant Inducement Transaction [Member] | Expected Volatility [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	145.9
December 11, 2019 Offering [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Beginning stock price	$ 0.27
December 11, 2019 Offering [Member] | Exercise Price [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	0.405
December 11, 2019 Offering [Member] | Expected Dividend Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	0.00
December 11, 2019 Offering [Member] | Discount Rate-Bond Equivalent Yield [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	1.64
December 11, 2019 Offering [Member] | Expected Life [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Expected life (in years)	5 years
December 11, 2019 Offering [Member] | Expected Volatility [Member]
Warrant Fair Value Black Scholes Method [Line Items]
Exercise price	153.7

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Summary of Significant Accounting Policies - Summary of Activity in Gross and Net Accounts Receivable Balances and Reserves (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Gross and net accounts receivable, Beginning Balance	$ 1,574,325	$ 1,193,426
Amounts Recognized Upon Delivery	5,528,566	3,250,298
Settlements Upon Adjudication	(3,575,813)	(2,869,399)
Gross and net accounts receivable, Ending Balance	3,527,078	1,574,325
Accounts Receivable Gross [Member]
Summary Of Significant Accounting Policies [Line Items]
Gross and net accounts receivable, Beginning Balance	7,882,602	6,937,063
Amounts Recognized Upon Delivery	19,001,873	12,835,371
Settlements Upon Adjudication	(10,030,090)	(11,889,832)
Gross and net accounts receivable, Ending Balance	16,854,385	7,882,602
Reserve for Contractual Discounts [Member]
Summary Of Significant Accounting Policies [Line Items]
Gross and net accounts receivable, Beginning Balance	(2,177,475)	(1,974,849)
Amounts Recognized Upon Delivery	(12,098,297)	(3,214,615)
Settlements Upon Adjudication	10,449,272	3,011,989
Gross and net accounts receivable, Ending Balance	(3,826,500)	(2,177,475)
Reserve for Aged Non-patient Receivables [Member]
Summary Of Significant Accounting Policies [Line Items]
Gross and net accounts receivable, Beginning Balance	(565,948)	(452,088)
Amounts Recognized Upon Delivery	(287,832)	(994,542)
Settlements Upon Adjudication	(646,247)	880,682
Gross and net accounts receivable, Ending Balance	(1,500,027)	(565,948)
Reserve for Estimated Patient Receivables [Member]
Summary Of Significant Accounting Policies [Line Items]
Gross and net accounts receivable, Beginning Balance	(15,477)	(88,120)
Amounts Recognized Upon Delivery	(111,572)	(135,955)
Settlements Upon Adjudication	121,974	208,598
Gross and net accounts receivable, Ending Balance	(5,075)	(15,477)
Reserve for Other Payer-specific Sales Allowances [Member]
Summary Of Significant Accounting Policies [Line Items]
Gross and net accounts receivable, Beginning Balance	(3,549,377)	(3,228,580)
Amounts Recognized Upon Delivery	(975,606)	(5,239,961)
Settlements Upon Adjudication	(3,470,722)	4,919,164
Gross and net accounts receivable, Ending Balance	$ (7,995,705)	$ (3,549,377)

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Leases - Schedule of Right-Of-Use Lease Assets (Detail)	Dec. 31, 2019 USD ($)
Lease right-of-use assets:
Operating	$ 729,330
Finance	1,606,387
Total	$ 2,335,717

XML

Common Stock Warrants Outstanding - Additional Information (Detail) - USD ($)					1 Months Ended				12 Months Ended
	Mar. 19, 2019	Sep. 24, 2018	Aug. 13, 2018	Jan. 30, 2018	Dec. 31, 2019	May 31, 2019	Mar. 31, 2019	Feb. 28, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 11, 2019	Feb. 12, 2019	Sep. 20, 2018
Class Of Warrant Or Right [Line Items]
Issuance of warrants to purchase shares of common stock											1,925,000
Common stock warrants outstanding, intrinsic value					$ 0				$ 0	$ 0
Exercise price of warrants	$ 1.25		$ 4.53	$ 1.20	$ 0.405			$ 1.20	$ 0.405			$ 1.20
Class of warrant or rights, term	5 years 6 months		5 years						5 years
Pre-funded Warrants [Member]
Class Of Warrant Or Right [Line Items]
Issuance of warrants to purchase shares of common stock											5,400,000		120,000
Common stock warrants outstanding, intrinsic value											$ 1,400,000		$ 350,000
Exercise price of warrants													$ 3.275
Pre-funded Warrants [Member] | Maximum [Member]
Class Of Warrant Or Right [Line Items]
Issuance of warrants to purchase shares of common stock													120,000
Warrants [Member]
Class Of Warrant Or Right [Line Items]
Warrants issued		762,438							41,189,726	4,526,731
Class of warrant or rights, first exercisable date									Mar. 24, 2019
Class of warrant or rights, expiration date									Mar. 24, 2024
Exercise price of warrants				$ 15.00
Class of warrant or rights, term				5 years
Warrants [Member] | Maximum [Member]
Class Of Warrant Or Right [Line Items]
Issuance of warrants to purchase shares of common stock				1,095,153
Warrants [Member] | February 2019 Financing Transaction [Member]
Class Of Warrant Or Right [Line Items]
Class of warrant or rights, expiration date								Feb. 12, 2024
Warrants [Member] | March 2019 Transaction [Member]
Class Of Warrant Or Right [Line Items]
Class of warrant or rights, expiration date							Sep. 19, 2024
Warrants [Member] | May 2019 Inducement Offering [Member]
Class Of Warrant Or Right [Line Items]
Class of warrant or rights, expiration date						Jul. 10, 2025
Warrants [Member] | December 2019 Underwritten Offering [Member]
Class Of Warrant Or Right [Line Items]
Class of warrant or rights, expiration date					Dec. 11, 2024

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Income Taxes - Schedule of Provision for Income Taxes (Detail)	12 Months Ended
	Dec. 31, 2018 USD ($)
Current:
State	$ 1,886
Total	1,886
Deferred
Provision for income tax	$ 1,886

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Assumptions Used for Determining Fair Values of Common Stock Warrants

The fair value of the warrants was estimated using a Monte Carlo simulation valuation model using Geometric Brownian Motion, incorporating anticipated future financing events, with the following assumptions:

Beginning stock price	$	10.17
Exercise price	$	15.00
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.48	%
Expected life (in years)		5.00
Expected volatility		99.00	%

The fair value of the warrants was estimated using a Black-Scholes model, incorporating the following assumptions:

Beginning stock price	$	3.89
Exercise price	$	4.53
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.75	%
Expected life (in years)		5.00
Expected volatility		128.69	%

The fair value of the warrants was estimated using a Black-Scholes model, incorporating the following assumptions:

Beginning stock price	$	2.92
Exercise price	$	3.16
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.77	%
Expected life (in years)		5.50
Expected volatility		130.7	%

The fair value of the warrants was estimated using a Black-Scholes model with the following assumptions:

Beginning stock price	$	1.05
Exercise price	$	1.20
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.49	%
Expected life (in years)		5.00
Expected volatility		147.7	%

The fair value of the warrants was estimated using a Black-Scholes model with the following assumptions:

Beginning stock price	$	1.12
Exercise price	$	1.25
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.44	%
Expected life (in years)		5.50
Expected volatility		140.0	%

The fair value of the warrants was estimated using a Black-Scholes model with the following assumptions:

Beginning stock price	$	1.29
Exercise price	$	1.31
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.05	%
Expected life (in years)		5.50
Expected volatility		145.9	%

The fair value of the warrants was estimated using a Black-Scholes model, incorporating the following assumptions:

Beginning stock price	$	0.27
Exercise price	$	0.405
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		1.64	%
Expected life (in years)		5.00
Expected volatility		153.7	%

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401(k) Plan

12 Months Ended

Dec. 31, 2019

Postemployment Benefits [Abstract]

401(k) Plan

13. 401(k) Plan

The Company sponsors a 401(k) savings plan for all eligible employees. The Company may make discretionary matching contributions to the plan to be allocated to employee accounts based upon employee deferrals and compensation. During the years ended December 31, 2018 and 2019, the Company made $215,000 and approximately $228,000, respectively, in matching contributions into the savings plan.

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Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (Unaudited)

17. Selected Quarterly Financial Data (Unaudited)

The following is selected quarterly financial data as of and for the periods ending:

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
December 31, 2018
Balance sheet data:
Cash	$	9,272,420		$	2,569,111		$	8,956,200		$	3,423,373
Total assets		14,747,827			8,291,310			14,551,892			8,750,303
Total non-current liabilities		1,357,193			1,258,261			1,174,397			1,098,137
Total shareholders’ equity		8,507,714			2,527,568			8,938,408			3,042,519
Statement of operations and comprehensive loss data:
Net revenues	$	806,943		$	822,238		$	761,591		$	859,526
Cost of revenues		2,434,886			2,699,671			2,481,916			2,435,262
Research and development expenses		1,070,584			1,019,285			1,089,746			1,288,957
General and administrative expenses		1,938,664			1,708,970			1,793,720			1,632,670
Sales and marketing expenses		1,636,542			1,433,174			1,404,192			1,440,798
Loss from operations		(6,273,733	)		(6,038,862	)		(6,007,983	)		(5,938,161	)
Net loss	$	(6,356,404	)	$	(6,153,101	)	$	(6,047,784	)	$	(6,014,312	)
Deemed dividend related to warrants down round provision		—			—			(636,370	)		—
Net loss attributable to common shareholders	$	(6,356,404	)	$	(6,153,101	)	$	(6,684,154	)	$	(6,014,312	)
Net loss per common share:1
Basic	$	(3.33	)	$	(2.70	)	$	(2.42	)	$	(1.43	)
Diluted	$	(3.33	)	$	(2.70	)	$	(2.42	)	$	(1.43	)
Weighted-average shares outstanding used in computing net loss per share attributable to common shareholders:
Basic		1,911,282			2,280,115			2,767,440			4,209,221
Diluted		1,911,282			2,280,115			2,759,614			4,209,221

¹ Basic and diluted net loss per common share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted net loss per common share.

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
December 31, 2019
Balance sheet data:
Cash	$	14,762,198		$	12,590,597		$	6,539,444		$	9,301,406
Total assets		21,891,932			19,904,840			14,520,914			17,732,644
Total non-current liabilities		1,452,244			983,419			1,032,243			973,189
Total shareholders’ equity		14,014,084			13,099,551			7,705,458			11,200,643
Statement of operations and comprehensive loss data:
Net revenues	$	1,024,239		$	1,191,323		$	1,529,262		$	1,783,742
Cost of revenues		2,599,364			2,673,323			2,832,735			2,872,098
Research and development expenses		1,223,291			1,148,280			1,163,546			1,161,905
General and administrative expenses		1,681,837			1,676,310			1,700,380			1,911,593
Sales and marketing expenses		1,374,560			1,614,732			1,462,335			1,489,216
Loss from operations		(5,854,813	)		(5,921,322	)		(5,629,734	)		(5,651,070	)
Net loss	$	(5,916,787	)	$	(7,816,012	)	$	(5,691,762	)	$	(5,713,478	)
Deemed dividend related to warrants down round provision		(99,743	)		—			—			(21,829	)
Net loss attributable to common shareholders	$	(6,016,530	)	$	(7,816,012	)	$	(5,691,762	)	$	(5,735,307	)
Net loss per common share:1
Basic	$	(0.61	)	$	(0.38	)	$	(0.25	)	$	(0.20	)
Diluted	$	(0.61	)	$	(0.38	)	$	(0.25	)	$	(0.20	)
Weighted-average shares outstanding used in computing net loss per share attributable to common shareholders:
Basic		9,792,093			20,466,224			23,018,235			29,128,632
Diluted		9,792,093			20,466,224			23,018,235			29,128,632

¹ Basic and diluted net loss per common share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted net loss per common share.

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Fair Value Measurements

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurement

5. Fair Value Measurements

The estimated nonrecurring fair value measurements associated with fixed asset purchases recorded as right-of-use asset finance lease obligations totaling approximately  $632,000 during the year ended December 31, 2019, were calculated as the present value of the lease payments based on contractual payment amounts and estimated market rates.  Upon adoption of guidance in ASC Topic 842 Leases, the estimated fair value of the right-of-use operating lease asset was recorded based on the present value of future lease payments based on contractual payment amounts and estimated market rates in effect.

Other Fair Value Measurement

As of the closing of the Company’s January 30, 2018 offering, the grant date fair value of the warrants issued to purchase up to 1,095,153 shares of common stock was estimated to be approximately $8.82 per share, or a total of approximately $9.7 million was recorded as an offset to additional paid-in capital on a relative fair value basis. The warrants sold in this offering currently have an exercise price of $0.405 per share, which is subject to down round adjustment, and expire five years from the date of issuance. The fair value of the warrants was estimated using a Monte Carlo simulation valuation model using Geometric Brownian Motion, incorporating anticipated future financing events, with the following assumptions:

Beginning stock price	$	10.17
Exercise price	$	15.00
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.48	%
Expected life (in years)		5.00
Expected volatility		99.00	%

As of the closing of the Company’s August 13, 2018 rights offering, the grant date fair value of the warrants issued to purchase up to 2,549,140 shares of common stock was estimated to be approximately $3.30 per share, or a total of approximately $8.4 million, was recorded as an offset to additional paid-in capital on a relative fair value basis. The warrants sold in this offering have an exercise price of $4.53 per share and expire five years from the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model, incorporating the following assumptions:

Beginning stock price	$	3.89
Exercise price	$	4.53
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.75	%
Expected life (in years)		5.00
Expected volatility		128.69	%

As of the closing of the Company’s September 20, 2018 offering, the grant date fair value of the warrants issued to purchase up to 762,438 shares of common stock was estimated to be approximately $2.57 per share, or a total of approximately $2.0 million was recorded as an offset to additional paid-in capital on a relative fair value basis. The warrants sold in this offering have an exercise price of $3.16 per share, and expire five years from the initial exercise date, which is the six-month anniversary of the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model, incorporating the following assumptions:

Beginning stock price	$	2.92
Exercise price	$	3.16
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.77	%
Expected life (in years)		5.50
Expected volatility		130.7	%

Also, included in the September 20, 2018 offering the Company issued 120,000 pre-funded warrants.  The pre-funded warrants had an intrinsic value of $350,000, were subsequently fully exercised and are no longer outstanding as of December 31, 2019.

As of the closing of the Company’s February 12, 2019 offering, the estimated grant date fair value of approximately $0.95 per share associated with the warrants to purchase up to 7,165,000 shares of common stock issued in this offering, or a total of approximately $6.8 million, was recorded as an offset to additional paid-in capital on a relative fair value basis. All warrants sold in this offering have an exercise price of $1.20 per share, are exercisable immediately and expire five years from the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model with the following assumptions:

Beginning stock price	$	1.05
Exercise price	$	1.20
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.49	%
Expected life (in years)		5.00
Expected volatility		147.7	%

As of the closing of the Company’s March 19, 2019 offering, the estimated grant date fair value of approximately $1.01 per share associated with the warrants to purchase up to 5,950,000 shares of common stock issued in this offering, or a total of approximately $6.0 million, was recorded as an offset to additional paid-in capital on a relative fair value basis. All warrants sold in this offering have an exercise price of $1.25 per share, are exercisable immediately and expire 5.5 years from the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model with the following assumptions:

Beginning stock price	$	1.12
Exercise price	$	1.25
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.44	%
Expected life (in years)		5.50
Expected volatility		140.0	%

As of the closing of the Company’s May 30, 2019 warrant inducement transaction, the estimated grant date fair value of approximately $1.18 per share associated with the warrants to purchase up to 1,547,226 shares of common stock issued in this offering, or a total of approximately $1.8 million, was recorded as a warrant inducement expense with an offset to additional paid-in capital. All warrants issued in this warrant inducement transaction have an exercise price of $1.31 per share, are exercisable immediately and expire 5.5 years from the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model with the following assumptions:

Beginning stock price	$	1.29
Exercise price	$	1.31
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		2.05	%
Expected life (in years)		5.50
Expected volatility		145.9	%

As of the closing of the Company’s December 11, 2019 offering, the grant date fair value of the warrants issued to purchase up to 26,527,500 shares of common stock were estimated to be approximately $0.24 per share, or a total of approximately $6.4 million, was recorded as an offset to additional paid-in capital on a relative fair value basis. The warrants sold in this offering are exercisable immediately, have an exercise price of $0.405 per share and expire five years from the date of issuance. The fair value of the warrants was estimated using a Black-Scholes model, incorporating the following assumptions:

Beginning stock price	$	0.27
Exercise price	$	0.405
Expected dividend yield		0.00	%
Discount rate-bond equivalent yield		1.64	%
Expected life (in years)		5.00
Expected volatility		153.7	%

Also, included in the December 11, 2019 offering the Company issued 5,400,000 pre-funded warrants.  The pre-funded warrants had an intrinsic value of $1.4 million, were subsequently fully exercised and are no longer outstanding as of December 31, 2019.

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Supplier Financings

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

Supplier Financings

9. Supplier Financings

In 2018 and 2019, the Company obtained third-party financing for certain business insurance premiums. The 2018 and 2019 financings bore interest at rates ranging from 4.40% to 6.20% per annum, and all financings were due within one year. As of December 31, 2018 and 2019 there were no balances outstanding under this arrangement.

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Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash	$ 9,301,406	$ 3,423,373
Accounts receivable, net	3,527,078	1,574,325
Inventories, net	767,986	587,222
Prepaid expenses and other current assets	296,127	425,961
Total current assets	13,892,597	6,010,881
Fixed assets, net	1,504,330	2,739,422
Lease right-of-use assets - operating	729,330
Lease right-of-use assets - finance	1,606,387
Total assets	17,732,644	8,750,303
Current liabilities:
Accounts payable	2,011,827	2,039,718
Accrued liabilities	1,980,204	1,928,393
Current portion of equipment financings		641,536
Current portion of lease liabilities - operating	842,452
Current portion of lease liabilities - finance	724,329
Total current liabilities	5,558,812	4,609,647
Non-current portion of equipment financings		985,015
Non-current portion of lease liabilities - finance	973,189
Non-current portion of deferred rent		113,122
Total liabilities	6,532,001	5,707,784
Commitments and contingencies (see Note 16)
Shareholders’ equity:
Preferred stock, $0.0001 par value, 5,000,000 shares authorized; 4,417 shares and 2,133 shares issued and outstanding at December 31, 2018 and 2019, respectively.
Common stock, $0.0001 par value, 150,000,000 shares authorized; 4,629,174 shares issued and outstanding at December 31, 2018; 54,738,485 shares issued and outstanding at December 31, 2019.	5,474	463
Additional paid-in capital	256,912,358	223,499,634
Accumulated deficit	(245,717,189)	(220,457,578)
Total shareholders’ equity	11,200,643	3,042,519
Total liabilities and shareholders’ equity	$ 17,732,644	$ 8,750,303

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Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities
Net loss	$ (25,138,039)	$ (24,571,601)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	931,655	800,905
Amortization of right-of-use assets	(158,341)
Inventory reserve	14,167	(38,499)
Stock-based compensation	869,579	623,412
Non-cash interest expense related to credit facility and other financing activities		29,426
Warrant inducement expense	1,831,116
Increase/(decrease) in cash resulting from changes in:
Accounts receivable, net	(1,952,753)	(380,899)
Inventory	(194,928)	(50,021)
Prepaid expenses and other current assets	523,293	488,505
Accounts payable	14,838	601,872
Accrued liabilities	210,152	460,972
Accrued interest		(202,609)
Deferred rent		(116,681)
Net cash used in operating activities	(23,049,261)	(22,355,218)
Cash Flows from Investing Activities:
Purchases of fixed assets	(735,300)	(145,253)
Net cash used in investing activities	(735,300)	(145,253)
Cash Flows from Financing Activities:
Net proceeds from issuance of common stock and warrants	25,744,997	25,693,474
Proceeds from exercise of common stock warrants	2,513,173	1,200
Proceeds from warrant exercise inducement	2,337,298
Payments on finance leases	(539,415)	(160,381)
Payments on supplier and other third-party financings	(393,459)	(559,092)
Payments on credit facility		(1,197,968)
Net cash provided by financing activities	29,662,594	23,777,233
Net increase in Cash	5,878,033	1,276,762
Cash at Beginning of Period	3,423,373	2,146,611
Cash at End of Period	9,301,406	3,423,373
Cash paid during the period for:
Interest	$ 249,984	605,485
Income taxes		$ 4,517

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Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Summary of Selected Quarterly Financial Data

The following is selected quarterly financial data as of and for the periods ending:

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
December 31, 2018
Balance sheet data:
Cash	$	9,272,420		$	2,569,111		$	8,956,200		$	3,423,373
Total assets		14,747,827			8,291,310			14,551,892			8,750,303
Total non-current liabilities		1,357,193			1,258,261			1,174,397			1,098,137
Total shareholders’ equity		8,507,714			2,527,568			8,938,408			3,042,519
Statement of operations and comprehensive loss data:
Net revenues	$	806,943		$	822,238		$	761,591		$	859,526
Cost of revenues		2,434,886			2,699,671			2,481,916			2,435,262
Research and development expenses		1,070,584			1,019,285			1,089,746			1,288,957
General and administrative expenses		1,938,664			1,708,970			1,793,720			1,632,670
Sales and marketing expenses		1,636,542			1,433,174			1,404,192			1,440,798
Loss from operations		(6,273,733	)		(6,038,862	)		(6,007,983	)		(5,938,161	)
Net loss	$	(6,356,404	)	$	(6,153,101	)	$	(6,047,784	)	$	(6,014,312	)
Deemed dividend related to warrants down round provision		—			—			(636,370	)		—
Net loss attributable to common shareholders	$	(6,356,404	)	$	(6,153,101	)	$	(6,684,154	)	$	(6,014,312	)
Net loss per common share:1
Basic	$	(3.33	)	$	(2.70	)	$	(2.42	)	$	(1.43	)
Diluted	$	(3.33	)	$	(2.70	)	$	(2.42	)	$	(1.43	)
Weighted-average shares outstanding used in computing net loss per share attributable to common shareholders:
Basic		1,911,282			2,280,115			2,767,440			4,209,221
Diluted		1,911,282			2,280,115			2,759,614			4,209,221

¹ Basic and diluted net loss per common share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted net loss per common share.

	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
December 31, 2019
Balance sheet data:
Cash	$	14,762,198		$	12,590,597		$	6,539,444		$	9,301,406
Total assets		21,891,932			19,904,840			14,520,914			17,732,644
Total non-current liabilities		1,452,244			983,419			1,032,243			973,189
Total shareholders’ equity		14,014,084			13,099,551			7,705,458			11,200,643
Statement of operations and comprehensive loss data:
Net revenues	$	1,024,239		$	1,191,323		$	1,529,262		$	1,783,742
Cost of revenues		2,599,364			2,673,323			2,832,735			2,872,098
Research and development expenses		1,223,291			1,148,280			1,163,546			1,161,905
General and administrative expenses		1,681,837			1,676,310			1,700,380			1,911,593
Sales and marketing expenses		1,374,560			1,614,732			1,462,335			1,489,216
Loss from operations		(5,854,813	)		(5,921,322	)		(5,629,734	)		(5,651,070	)
Net loss	$	(5,916,787	)	$	(7,816,012	)	$	(5,691,762	)	$	(5,713,478	)
Deemed dividend related to warrants down round provision		(99,743	)		—			—			(21,829	)
Net loss attributable to common shareholders	$	(6,016,530	)	$	(7,816,012	)	$	(5,691,762	)	$	(5,735,307	)
Net loss per common share:1
Basic	$	(0.61	)	$	(0.38	)	$	(0.25	)	$	(0.20	)
Diluted	$	(0.61	)	$	(0.38	)	$	(0.25	)	$	(0.20	)
Weighted-average shares outstanding used in computing net loss per share attributable to common shareholders:
Basic		9,792,093			20,466,224			23,018,235			29,128,632
Diluted		9,792,093			20,466,224			23,018,235			29,128,632

¹ Basic and diluted net loss per common share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted net loss per common share.

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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Assumptions Used for Determining Fair Value of Stock Options Under Black-Scholes Pricing Model

The assumptions used in the Black-Scholes pricing model for options granted during the years ended December 31, 2018 and 2019 are as follows:

	2018	2019
Stock and exercise prices	$0.86 - $6.00	$0.29 - $1.03
Expected dividend yield	0.00%	0.00%
Discount rate-bond equivalent yield	2.50% - 3.02%	1.58% - 2.55%
Expected life (in years)	4.00 - 5.96	4.00 - 5.96
Expected volatility	100% - 120%	128% - 156%

Summary of Stock Option Activity

A summary of stock option activity for the years ended December 31, 2018 and 2019 is as follows:

	Number of Shares			Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term in Years
Outstanding at December 31, 2017		81,643		$	113.68		8.80
Granted		142,587		$	2.20
Exercised		—			—
Cancelled/forfeited/expired		(28,410	)	$	57.96
Outstanding at December 31, 2018		195,820		$	41.41		9.20
Granted		2,676,229		$	0.91
Exercised		—			—
Cancelled/forfeited/expired		(140,026	)	$	3.70
Outstanding at December 31, 2019		2,732,023		$	3.66		9.25
Vested and unvested expected to vest, December 31, 2019		2,655,129		$	3.74		9.25

Summary of RSU Activity

A summary of RSU activity during 2018 and 2019 is as follows:

	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2017		12,030		$	56.10
Granted		—		$	0
Vested and issued		(5,835	)	$	45.00
Forfeited		(5,835	)	$	45.00
Outstanding at December 31, 2018		360		$	415.80
Granted		—		$	—
Vested and issued		—		$	—
Forfeited		—		$	—
Outstanding at December 31, 2019		360		$	415.80
Vested, December 31, 2019		360		$	415.80

Effects of Stock-Based Compensation Related to Equity Awards to Employees and Nonemployees on Statement of Operations

The following table presents the effects of stock-based compensation related to equity awards to employees and nonemployees on the statement of operations during the periods presented:

	Years Ended December 31,
	2018			2019
Stock Options
Cost of revenues	$	46,708		$	77,495
Research and development expenses		133,525			127,844
General and administrative expenses		300,433			517,324
Sales and marketing expenses		78,321			146,916
Total expenses related to stock options		558,987			869,579
RSUs
Cost of revenues		(18,802	)		—
Research and development expenses		13,576			—
General and administrative expenses		54,302			—
Sales and marketing expenses		15,349			—
Total stock-based compensation	$	623,412		$	869,579

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Summary of Significant Accounting Policies - Composition of Net Revenues Recognized Disaggregated by Nature (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Net revenues	$ 1,783,742	$ 1,529,262	$ 1,191,323	$ 1,024,239	$ 859,526	$ 761,591	$ 822,238	$ 806,943	$ 5,528,566	$ 3,250,298
Commercial Revenues [Member] | Net Commercial Revenues Recognized Upon Delivery [Member]
Summary Of Significant Accounting Policies [Line Items]
Net revenues									5,116,210	3,042,122
Development Services Revenues [Member]
Summary Of Significant Accounting Policies [Line Items]
Net revenues									212,344	198,736
Kits and Blood Collection Tubes [Member]
Summary Of Significant Accounting Policies [Line Items]
Net revenues									$ 200,012	$ 9,440

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Stock-Based Compensation - Summary of Stock Option Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares Outstanding, Beginning Balance	195,820	81,643
Number of Shares, Granted	2,676,229	142,587
Number of Shares, Cancelled/forfeited/expired	(140,026)	(28,410)
Number of Shares Outstanding, Ending Balance	2,732,023	195,820	81,643
Number of Shares, Vested and unvested expected to vest, Ending Balance	2,655,129
Weighted Average Exercise Price Per Share, Outstanding, Beginning Balance	$ 41.41	$ 113.68
Weighted Average Exercise Price Per Share, Granted	0.91	2.20
Weighted Average Exercise Price Per Share, Cancelled/forfeited/expired	3.70	57.96
Weighted Average Exercise Price Per Share, Outstanding, Ending Balance	3.66	$ 41.41	$ 113.68
Weighted Average Exercise Price Per Share, Vested and unvested expected to vest, Ending Balance	$ 3.74
Weighted Average Remaining Contractual Term in Years, Outstanding	9 years 3 months	9 years 2 months 12 days	8 years 9 months 18 days
Weighted Average Remaining Contractual Term in Years, Vested and unvested expected to vest	9 years 3 months

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Leases - Schedule of Current Portion of Operating and Finance Lease Liabilities (Detail)	Dec. 31, 2019 USD ($)
Current portion of lease liability:
Operating	$ 842,452
Finance	724,329
Total	$ 1,566,781

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Leases - Supplemental Cash Flow Information Related to Operating and Finance Leases (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Other information
Operating cash flows from finance leases	$ 249,984
Operating cash flows from operating leases	1,430,366
Financing cash flows from finance leases	$ 539,415	$ 160,381