SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Dec. 31, 2017

Description Of Business [Policy Text Block]

Overview of the Business

Capstone Therapeutics Corp. (the “Company”, “we”, “our” or “us”) is a biotechnology company committed to developing a pipeline of novel peptides and other molecules aimed at helping patients with under-served medical conditions. Previously, we were focused on the development and commercialization of two product platforms: AZX100 and Chrysalin (TP508). In 2012, we terminated the license for Chrysalin (targeting orthopedic indications). In 2014, we terminated the license for AZX100 (targeting dermal scar reduction). Capstone no longer has any rights to or interest in Chrysalin or AZX100.

On August 3, 2012, we entered into a joint venture, LipimetiX Development, LLC, (now LipimetiX Development, Inc.), (the “JV”), to develop Apo E mimetic peptide molecule AEM-28 and its analogs. The JV has a development plan to pursue regulatory approval of AEM-28, and/or an analog, as treatment for Homozygous Familial Hypercholesterolemia (granted Orphan Drug Designation by FDA in 2012), other hyperlipidemic indications, and acute coronary syndrome/atherosclerosis regression. The initial AEM-28 development plan extended through Phase 1a and 1b/2a clinical trials and was completed in the fourth quarter of 2014. The clinical trials had a safety primary endpoint and an efficacy endpoint targeting reduction of cholesterol and triglycerides.

The JV received allowance from regulatory authorities in Australia permitting the JV to proceed with the planned clinical trials. The Phase 1a clinical trial commenced in Australia in April 2014 and the Phase 1b/2a clinical trial commenced in Australia in June 2014. The clinical trials for AEM-28 were randomized, double-blinded, placebo-controlled studies to evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of six escalating single doses (Phase 1a in healthy patients with elevated cholesterol) and multiple ascending doses of the three highest doses from Phase 1a (Phase 1b/2a in patients with hypercholesterolemia and healthy volunteers with elevated cholesterol and high Body Mass Index). The Phase 1a clinical trial consisted of 36 patients and the Phase 1b/2a consisted of 15 patients. Both clinical trials were completed in 2014 and the Medical Safety Committee, reviewing all safety-related aspects of the clinical trials, observed a generally acceptable safety profile. As first-in-man studies, the primary endpoint was safety; yet efficacy measurements analyzing pharmacodynamics yielded statistical significance in the pooled dataset favoring AEM-28 versus placebo in multiple lipid biomarker endpoints.

Concurrent with the clinical development activities of AEM-28, the JV has performed pre-clinical studies that have identified analogs of AEM-28, and a new formulation, that have the potential of increased efficacy, higher human dose toleration and an extended composition of matter patent life (application filed with the U.S. Patent and Trademark Office in 2014).

The JV and the Company are exploring fundraising, partnering or licensing, to obtain additional funding to continue development activities and operations.

The JV and the Company do not have sufficient funding at this time to continue additional material development activities. The JV may conduct future clinical trials in Australia, the USA, and other regulatory jurisdictions if regulatory approvals, additional funding, and other conditions permit.

The Company, funding permitting, intends to continue limiting its internal operations to a virtual operating model while monitoring and participating in the management of JV’s development activities.

Description of Current Peptide Drug Candidates.

Apo E Mimetic Peptide Molecule – AEM-28 and its analogs

Apolipoprotein E is a 299 amino acid protein that plays an important role in lipoprotein metabolism. Apolipoprotein E (Apo E) is in a class of protein that occurs throughout the body. Apo E is essential for the normal metabolism of cholesterol and triglycerides. After a meal, the postprandial (or post-meal) lipid load is packaged in lipoproteins and secreted into the blood stream. Apo E targets cholesterol and triglyceride rich lipoproteins to specific receptors in the liver, decreasing the levels in the blood. Elevated plasma cholesterol and triglycerides are independent risk factors for atherosclerosis, the buildup of cholesterol rich lesions and plaques in the arteries. AEM-28 is a 28 amino acid mimetic of Apo E and AEM-28 analogs, are also 28 amino acid mimetics of Apo E (with an aminohexanoic acid group and a phospholipid), and both contain a domain that anchors into a lipoprotein surface while also providing the Apo E receptor binding domain, which allows clearance through the heparan sulfate proteoglycan (HSPG) receptors (Syndecan-1) in the liver. AEM-28 and its analogs, as Apo E mimetics, have the potential to restore the ability of these atherogenic lipoproteins to be cleared from the plasma, completing the reverse cholesterol transport pathway, and thereby reducing cardiovascular risk. This is an important mechanism of action for AEM-28 and its analogs. Atherosclerosis is the major cause of cardiovascular disease, peripheral artery disease and cerebral artery disease, and can cause heart attack, loss of limbs and stroke. Defective lipid metabolism also plays an important role in the development of adult onset diabetes mellitus (Type 2 diabetes), and diabetics are particularly vulnerable to atherosclerosis, heart and peripheral artery diseases. Our joint venture has an Exclusive License Agreement with the University of Alabama at Birmingham Research Foundation for a broad domain of Apo E mimetic peptides, including AEM-28 and its analogs.

Company History [Policy Text Block]

Company History

Prior to November 26, 2003, we developed, manufactured and marketed proprietary, technologically advanced orthopedic products designed to promote the healing of musculoskeletal bone and tissue, with particular emphasis on fracture healing and spine repair. Our product lines, which included bone growth stimulation and fracture fixation devices, are referred to as our “Bone Device Business.” In November 2003, we sold our Bone Device Business.

In August 2004, we purchased substantially all of the assets and intellectual property of Chrysalis Biotechnology, Inc., including its exclusive worldwide license for Chrysalin, a peptide, for all medical indications. Subsequently, our efforts were focused on research and development of Chrysalin with the goal of commercializing our products in fresh fracture healing. (In March 2012, we returned all rights to the Chrysalin intellectual property and no longer have any interest in, or rights to, Chrysalin.)

In February 2006, we purchased certain assets and assumed certain liabilities of AzERx, Inc. Under the terms of the transaction, we acquired an exclusive license for the core intellectual property relating to AZX100, an anti-fibrotic peptide. In 2014, we terminated the License Agreement with AzTE (Licensor) for the core intellectual property relating to AZX100 and returned all interest in and rights to the AZX100 intellectual property to the Licensor.

On August 3, 2012, we entered into a joint venture (see Note 8 below) to develop Apo E mimetic peptide molecule AEM-28 and its analogs.

Our development activities represent a single operating segment as they shared the same product development path and utilized the same Company resources. As a result, we determined that it is appropriate to reflect our operations as one reportable segment.

OrthoLogic Corp. commenced doing business under the trade name of Capstone Therapeutics on October 1, 2008, and we formally changed our name from OrthoLogic Corp. to Capstone Therapeutics Corp. on May 21, 2010.

In these notes, references to “we”, “our”, “us”, the “Company”, “Capstone Therapeutics”, “Capstone”, and “OrthoLogic” refer to Capstone Therapeutics Corp. References to our joint venture or “JV”, refer to LipimetiX Development, Inc. (formerly LipimetiX Development, LLC).

Basis Of Presentation and Management Plan [Policy Text Block]

Basis of presentation, Going Concern, and Management’s Plans. The accompanying financials statements have been prepared assuming the Company will continue as a going concern, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business.

Management has determined that the Company will require additional capital above its current cash and working capital balances to further develop AEM-28 and its analogs or continue operations. Accordingly, the Company has significantly reduced its development activities. The Company’s corporate strategy is to raise funds by possibly engaging in a strategic/merger transaction or conducting a private or public offering of debt or equity securities for capital. In August 2016, the Company’s joint venture raised net funds of $946,000 in a Series B-1 Preferred Stock and Warrant offering. As described in Note 10 to the Financial Statements included in this Annual Report on Form 10-K, the Company, on July 14, 2017, raised $3,440,000, with net proceeds of approximately $2,074,000, after paying off the Convertible Promissory Notes described in Note 9 and transaction costs of $287,000. As discussed in Note 8 to the Financial Statements included in this Annual Report on Form 10-K, in August 2017, the Company used $1,000,000 of the net proceeds to purchase 93,458 shares of LipimetiX Development, Inc.’s Series B-2 Preferred Stock. The additional funds raised has alleviated the substantial doubt about the entity’s ability to continue as a going concern; however, additional funds will be required for the joint venture to reach its development goals and for the Company to continue its planned operations.

Use of Estimates, Policy [Policy Text Block]

Use of estimates. The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America requires that management make a number of assumptions and estimates that affect the reported amounts of assets, liabilities, and expenses in our financial statements and accompanying notes. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management’s assumptions regarding current events and actions that may impact the Company in the future, actual results may differ from these estimates and assumptions.

Our significant estimates include income taxes, contingencies, accounting for stock-based compensation, and accounting for the Australian refundable research and development tax credit.

Fair Value Measurement, Policy [Policy Text Block]

Fair value measurements. We determine the fair value measurements of our applicable assets and liabilities based on a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted market prices in active markets; 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 for which little or no market data exists, therefore requiring an entity to develop its own assumptions.

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash and cash equivalents. Cash and cash equivalents consist of highly liquid investments with an original maturity of three months or less.

Property, Plant and Equipment, Policy [Policy Text Block]

Furniture and equipment. Furniture and equipment are stated at cost. Depreciation is calculated on a straight-line basis over the estimated useful lives of the various assets, which range from three to seven years. Leasehold improvements are amortized over the life of the asset or the period of the respective lease using the straight-line method, whichever is the shortest.

Research and Development Expense, Policy [Policy Text Block]

Research and development expenses. Research and development represents costs incurred for research and development activities, including costs incurred to fund the pre-clinical and clinical testing of our product candidates. Research and development costs are generally expensed when incurred. Nonrefundable advance payments are capitalized and recorded as expense when the respective product or service is delivered.

Accrued Clinical [Policy Text Block]

Accrued Clinical. Accrued clinical represents the liability recorded for the costs incurred for our human clinical trials. Total patient costs are based on the specified clinical trial protocol, recognized over the period of time service is provided to the subject. We had no active clinical trials at December 31, 2017 or December 31, 2016.

Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]

Stock-based compensation. We account for share-based compensation arrangements in accordance with ASC Topic 718 “Compensation - Stock Compensation” (“ASC 718”). ASC 718 requires all share-based payments, including grants of stock options, restricted stock units and employee stock purchase rights, to be recognized in our financial statements based on their respective grant date fair values. Under this standard, the fair value of each grant is estimated on the date of grant using a valuation model that meets certain requirements. We use the Black-Scholes option pricing model to estimate the fair value of our share-based payment awards. The determination of the fair value of share-based payment awards utilizing the Black-Scholes model was affected by our stock price and a number of assumptions, including expected volatility, expected term, risk-free interest rate and an expected dividend yield. We used our historical volatility as adjusted for future expectations. The expected life of the stock options was based on historical data and future expectations of when the awards will be exercised. The risk-free interest rate assumption was based on observed interest rates with durations consistent with the expected terms of our stock options. The dividend yield assumption was based on our history and expectation of dividend payouts. The fair value of our restricted stock units was based on the fair market value of our common stock on the date of grant. We evaluated the assumptions used to value our share-based payment awards on a quarterly basis. For non-employees, expense was recognized as the service was provided and when performance was complete in accordance with ASC Topic 505 – 550 “Equity-Based Payments to Non-Employees.”

Effective January 1, 2006, stock-based compensation expense recognized in our financial statements has been based on awards that were ultimately expected to vest. We recognized compensation cost for an award with only service conditions that had a graded vesting schedule on a straight line basis over the requisite service period as if the award was, in-substance, a multiple award. However, the amount of compensation cost recognized at any date was at least equal to the portion of grant-date fair value of the award that was vested at that date. The amount of stock-based compensation expense is reduced for estimated forfeitures. Forfeitures were required to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differed from those estimates.

ASC 718 requires the benefits associated with tax deductions that are realized in excess of recognized compensation cost to be reported as a financing cash flow rather than as an operating cash flow as previously required. Subsequent to the adoption of ASC 718 on January 1, 2006, we have not recorded any excess tax benefit generated from option exercises, due to our net operating loss carryforwards, which cause such excess benefits to be unrealized.

The Company recorded stock-based compensation of $0 in 2017 and $35,000 in 2016, which increased the net loss in 2016. Loss per weighted average basic and diluted shares outstanding increased by less than $0.01 per share in 2016 due to stock-based compensation.

Earnings Per Share, Policy [Policy Text Block]

Loss per common share. In determining loss per common share for a period, we use weighted average shares outstanding during the period for primary shares and we utilize the treasury stock method to calculate the weighted average shares outstanding during the period for diluted shares. Utilizing the treasury stock method for the year ended December 31, 2017, 19,000 shares were determined to be outstanding and excluded from the calculation of loss per share because they were anti-dilutive. At December 31, 2017, options to purchase 3,516,706 shares of our common stock, at exercise prices ranging from $0.05 to $1.35 per share, were outstanding.

Income Tax, Policy [Policy Text Block]

Income Taxes. Under ASC Topic 740 “Income Taxes” (“ASC 740”), income taxes are recorded based on current year amounts payable or refundable, as well as the consequences of events that give rise to deferred tax assets and liabilities. We base our estimate of current and deferred taxes on the tax laws and rates that are estimated to be in effect in the periods in which deferred tax liabilities or assets are expected to be settled or realized. Pursuant to ASC 740, we have determined that the deferred tax assets at December 31, 2017 and 2016 require a full valuation allowance given that it is not “more-likely-than-not” that the assets will be recovered.

We adopted the provisions of Financial Accounting Standards Board (“FASB”) Interpretation No. 48, “Accounting for Uncertainty in Income Taxes-an interpretation of FASB Statement No. 109” (now ASC 740) on January 1, 2007. ASC 740 clarifies the accounting for uncertainty in income taxes recognized in an enterprise’s financial statements and prescribes a recognition threshold and measurement process for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. ASC 740 also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition.

Subsequent to adoption of ASC 740, each period we evaluate the tax years that remain open for assessment for federal and state tax purposes. At December 31, 2017, tax years 2013 through 2017 remain open.

We may, from time-to-time, be assessed interest or penalties by major tax jurisdictions, although any such assessments historically have been minimal and immaterial to our financial results. The Company recognizes accrued interest and penalties, if applicable, related to unrecognized tax benefits in income tax expense. During the years ended December 31, 2017 and 2016, the Company did not recognize a material amount in interest and penalties.

Intangible Assets, Finite-Lived, Policy [Policy Text Block]

Patents. Patent license rights were recorded at $1,045,000, their estimated fair value on the date they were acquired, August 3, 2012. Their cost will be amortized on a straight-line basis over the key patent life of eighty months. At December 31, 2017, accumulated amortization totaled $849,000. If a change in conditions occurs, that indicates a material change in the future utility of the patent license rights, an evaluation will be performed to determine if impairment of the asset has occurred, and if so, the impairment will be recorded.

Interest in Unincorporated Joint Ventures or Partnerships, Policy [Policy Text Block]

Joint Venture Accounting. The Company entered into a joint venture in which it has contributed $6,000,000, and the noncontrolling interests have contributed certain patent license rights. As discussed in Note 8 to the Financial Statements included in this Annual Report on Form 10-K, in August 2017, the Company purchased 93,458 shares of LipimetiX Development, Inc.’s Series B-2 Preferred Stock for $1,000,000. Neither the Company nor the noncontrolling interests have an obligation to contribute additional funds to the joint venture or to assume any joint venture liabilities or to provide a guarantee of either joint venture performance or any joint venture liability. The financial position and results of operations of the joint venture are presented on a consolidated basis with the financial position and results of operations of the Company. Intercompany transactions have been eliminated. Joint venture losses were recorded on the basis of common ownership equity interests until common ownership equity was reduced to $0. Subsequent joint venture losses were allocated to the Series A and B-1 preferred ownership. Subsequent to March 31, 2013, all joint venture losses had been allocated to the Company. On August 25, 2016, the JV raised $1,012,000 ($946,000 net of issuance costs) in a Series B-1 Preferred Stock and Warrant offering and in 2016, $946,000 in losses were allocated to the Series B-1 Preferred Stock ownership interests. As of December 31, 2017, losses incurred by the JV exceeded the capital accounts of the JV. The Company has a revolving loan agreement with the joint venture to advance the joint venture funds for operations in an amount not to exceed a net (net of expected tax credits or other funds obtained) of $1,600,000, with the net amount due December 31, 2016. As described in Note 8 to the Financial Statements included in this Annual Report on Form 10-K, the due date of the revolving loan has been extended to July 15, 2020, with early payment required upon certain additional funding of the joint venture by non-affiliated parties. Losses incurred by the joint venture in excess of the capital accounts of the joint venture will be allocated to the Company to the extent of net outstanding advances.

Commitments and Contingencies, Policy [Policy Text Block]

Legal and Other Contingencies

The Company is subject to legal proceedings and claims, as well as potential inquires and action by the Securities and Exchange Commission, that arise in the course of business. The Company records a liability when it is probable that a loss has been incurred and the amount is reasonably estimable. There is significant judgment required in both the probability determination and as to whether an exposure can be reasonably estimated. In the opinion of management, there was not at least a reasonable possibility the Company may have incurred a material loss with respect to loss contingencies. However, the outcome of legal proceedings and claims brought against the Company are subject to significant uncertainty.

Legal costs related to contingencies are expensed as incurred and were not material in either 2017 or 2016.

New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Pronouncements

In August 2014, the Financial Accounting Standards Board issued Accounting Standard Update (“ASU”) No. 2014-15, Presentation of Financial Statements – Going Concern (Subtopic 205-40)(“Update”): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern, providing a requirement under U.S. GAAP for an entity’s management to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date the financial statements are issued; and if those conditions exist, to disclose that fact, the conditions and the potential effects on the entity’s ability to meet its obligations. The Update was effective for an annual period ending after December 15, 2016, with early application permitted.

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09 “Revenue from Contracts from Customers,” which supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605),” and requires entities to recognize revenue in a way that depicts the transfer of potential goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to the exchange for those goods or services. ASU 2014-09 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2017 and earlier application is permitted only as of annual reporting periods beginning after December 15, 2016. Should the Company begin to generate revenue, the Company does not anticipate any material impact on its operations and financial statements.