10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549FORM 10-Q

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

For the quarterly period ended March 31, 2019

OR

o 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: 1-36282

LA JOLLA PHARMACEUTICAL COMPANY

(Exact name of registrant as specified in its charter)

California	33-0361285
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
4550 Towne Centre Court, San Diego, CA	92121
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (858) 207-4264

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 $0.0001 per share	LJPC	The Nasdaq Capital Market

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 x No o

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 x No o

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 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	o	Accelerated filer	x
Non-accelerated filer	o	Smaller reporting company	x
		Emerging growth company	o

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 13(a) of the Exchange Act.o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No x

As of April 25, 2019, there were 27,098,778 shares of common stock outstanding.

LA JOLLA PHARMACEUTICAL COMPANY

FORM 10-Q

QUARTERLY REPORT

TABLE OF CONTENTS

PART I — FINANCIAL INFORMATION
ITEM 1. Condensed Consolidated Financial Statements
Condensed Consolidated Balance Sheets as of March 31, 2019 (Unaudited) and December 31, 2018	1
Unaudited Condensed Consolidated Statements of Operations for the Three Months Ended March 31, 2019 and 2018	2
Unaudited Condensed Consolidated Statements of Shareholders’ Equity for the Three Months Ended March 31, 2019 and 2018	3
Unaudited Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2019 and 2018	4
Notes to Unaudited Condensed Consolidated Financial Statements	5
ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	10
ITEM 3. Quantitative and Qualitative Disclosures about Market Risk	16
ITEM 4. Controls and Procedures	16
PART II — OTHER INFORMATION
ITEM 1. Legal Proceedings	17
ITEM 1A. Risk Factors	17
ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds	17
ITEM 3. Defaults upon Senior Securities	17
ITEM 4. Mine Safety Disclosures	17
ITEM 5. Other Information	17
ITEM 6. Exhibits	18
SIGNATURES	19

PART I. FINANCIAL INFORMATION

ITEM 1. CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

LA JOLLA PHARMACEUTICAL COMPANY

Condensed Consolidated Balance Sheets

(in thousands, except share and par value amounts)

	March 31, 2019			December 31, 2018
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	140,017		$	172,604
Accounts receivable, net	1,999			1,381
Inventory, net	1,977			2,020
Prepaid expenses and other current assets	5,139			5,111
Total current assets	149,132			181,116
Property and equipment, net	21,306			22,267
Right-of-use lease asset	16,482			—
Restricted cash	909			909
Total assets	$	187,829		$	204,292
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	3,041		$	8,572
Accrued expenses	9,572			8,485
Accrued payroll and related expenses	2,036			7,509
Deferred rent, current portion	—			1,370
Lease liability, current portion	2,587			—
Total current liabilities	17,236			25,936
Deferred rent, less current portion	—			13,609
Lease liability, less current portion	28,572			—
Deferred royalty obligation, net	124,336			124,323
Other noncurrent liabilities	6,384			4,503
Total liabilities	176,528			168,371
Shareholders’ equity:
Common Stock, $0.0001 par value; 100,000,000 shares authorized, 27,093,026 and 26,259,254 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	3			3
Series C-12 Convertible Preferred Stock, $0.0001 par value; 11,000 shares authorized, 3,906 shares issued and outstanding at March 31, 2019 and December 31, 2018; and liquidation preference of $3,906 at March 31, 2019 and December 31, 2018	3,906			3,906
Series F Convertible Preferred Stock, $0.0001 par value; 10,000 shares authorized, 0 and 2,737 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively; and liquidation preference of $0 and $2,737 at March 31, 2019 and December 31, 2018, respectively	—			2,737
Additional paid-in capital	959,900			950,258
Accumulated deficit	(952,508		)	(920,983		)
Total shareholders’ equity	11,301			35,921
Total liabilities and shareholders’ equity	$	187,829		$	204,292

See accompanying notes to the condensed consolidated financial statements.

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LA JOLLA PHARMACEUTICAL COMPANY

Unaudited Condensed Consolidated Statements of Operations

(in thousands, except per share amounts)

	Three Months Ended   March 31,
	2019			2018
Revenue
Net product sales	$	4,395		$	809
Total revenue	4,395			809
Operating expenses
Cost of product sales	500			58
Research and development	21,244			28,429
Selling, general and administrative	12,320			23,016
Total operating expenses	34,064			51,503
Loss from operations	(29,669		)	(50,694		)
Other (expense) income
Interest expense	(2,729		)	—
Interest income	713			166
Total other (expense) income, net	(2,016		)	166
Net loss	$	(31,685	)	$	(50,528	)
Net loss per share, basic and diluted	$	(1.17	)	$	(2.22	)
Weighted-average common shares outstanding, basic and diluted	27,035			22,742

See accompanying notes to the condensed consolidated financial statements.

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LA JOLLA PHARMACEUTICAL COMPANY

Unaudited Condensed Consolidated Statements of Shareholders’ Equity

(in thousands)

	Series C-12 Convertible Preferred Stock			Series F Convertible Preferred Stock					Common Stock			Additional Paid-in Capital			Accumulated Deficit			Total Shareholders’ Equity
	Shares	Amount		Shares		Amount			Shares	Amount
Balance at December 31, 2018	4	$	3,906	3		$	2,737		26,259	$	3	$	950,258		$	(920,983	)	$	35,921
Share-based compensation expense	—	—		—		—			—	—		6,782			—			6,782
Issuance of common stock under ESPP	—	—		—		—			52	—		283			—			283
Issuance of common stock for conversion of Series F Preferred Stock	—	—		(3	)	(2,737		)	782	—		2,737			—			—
Cumulative-effect adjustment from adoption of ASU 2018-07	—	—		—		—			—	—		(160		)	160			—
Net loss	—	—		—		—			—	—		—			(31,685		)	(31,685		)
Balance at March 31, 2019	4	$	3,906	—		$	—		27,093	$	3	$	959,900		$	(952,508	)	$	11,301

	Series C-12 Convertible Preferred Stock			Series F Convertible Preferred Stock			Common Stock			Additional Paid-in Capital		Accumulated Deficit			Total Shareholders’ Equity
	Shares	Amount		Shares	Amount		Shares	Amount
Balance at December 31, 2017	4	$	3,906	3	$	2,737	22,167	$	2	$	803,071	$	(721,514	)	$	88,202
Issuance of common stock for March 2018 financing	—	—		—	—		3,910	1		109,808		—			109,809
Share-based compensation expense	—	—		—	—		—	—		9,402		—			9,402
Exercise of stock options and warrants for common stock	—	—		—	—		77	—		528		—			528
Net loss	—	—		—	—		—	—		—		(50,528		)	(50,528		)
Balance at March 31, 2018	4	$	3,906	3	$	2,737	26,154	$	3	$	922,809	$	(772,042	)	$	157,413

See accompanying notes to the condensed consolidated financial statements.

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LA JOLLA PHARMACEUTICAL COMPANY

Unaudited Condensed Consolidated Statements of Cash Flows

(in thousands)

	Three Months Ended   March 31,
	2019			2018
Operating activities
Net loss	$	(31,685	)	$	(50,528	)
Adjustments to reconcile net loss to net cash used for operating activities:
Share-based compensation expense	6,711			9,402
Depreciation expense	1,130			992
Loss on disposal of equipment	15			132
Accretion of right-of-use lease asset	(302		)	—
Non-cash interest expense	2,310			—
Changes in operating assets and liabilities:
Accounts receivable, net	(618		)	—
Inventory, net	43			(820		)
Prepaid expenses and other current assets	(28		)	(3,179		)
Accounts payable	(5,531		)	(4,163		)
Accrued expenses	742			3,577
Accrued payroll and related expenses	(5,473		)	(1,951		)
Deferred rent	—			688
Net cash used for operating activities	(32,686		)	(45,850		)
Investing activities
Purchase of property and equipment	(184		)	(994		)
Net cash used for investing activities	(184		)	(994		)
Financing activities
Proceeds from the issuance of common stock under ESPP	283			—
Net proceeds from the issuance of common stock	—			109,809
Net proceeds from the exercise of stock options for common stock	—			528
Net cash provided by financing activities	283			110,337
Net (decrease) increase in cash, cash equivalents and restricted cash	(32,587		)	63,493
Cash, cash equivalents and restricted cash at beginning of period	173,513			91,824
Cash, cash equivalents and restricted cash at end of period	$	140,926		$	155,317
Supplemental disclosure of non-cash investing and financing activities:
Conversion of Series F Convertible Preferred Stock into common stock	$	2,737		$	—
Cumulative-effect adjustment from adoption of ASU 2018-07	$	(160	)	$	—
Initial recognition of right-of-use lease asset	$	16,798		$	—
Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets
Cash and cash equivalents	$	140,017		$	154,408
Restricted cash	909			909
Total cash, cash equivalents and restricted cash	$	140,926		$	155,317

See accompanying notes to the condensed consolidated financial statements.

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LA JOLLA PHARMACEUTICAL COMPANY

Notes to Condensed Consolidated Financial Statements

(Unaudited)

1. Business

La Jolla Pharmaceutical Company (collectively with its wholly-owned subsidiaries, the Company) is a biopharmaceutical company focused on the discovery, development and commercialization of innovative therapies intended to significantly improve outcomes in patients suffering from life-threatening diseases. GIAPREZA^TM (angiotensin II), formerly known as LJPC-501, was approved by the U.S. Food and Drug Administration (FDA) on December 21, 2017 as a vasoconstrictor indicated to increase blood pressure in adults with septic or other distributive shock. LJPC-0118 is La Jolla’s investigational product for the treatment of severe malaria. LJPC-401 (synthetic human hepcidin), a clinical-stage investigational product, is being developed for the potential treatment of conditions characterized by iron overload, such as hereditary hemochromatosis, beta thalassemia, sickle cell disease, myelodysplastic syndrome and polycythemia vera.

As of March 31, 2019, the Company had $140.0 million in cash and cash equivalents, compared to $172.6 million in cash and cash equivalents as of December 31, 2018. Based on the Company’s current operating plans and projections, the Company expects that its cash and cash equivalents as of March 31, 2019 will be sufficient to fund operations for at least one year from the date this Quarterly Report on Form 10-Q is filed with the SEC.

2. Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation and Use of Estimates

The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of U.S. Securities and Exchange Commission (SEC) Regulation S-X. Accordingly, they should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2018 included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018, filed with the SEC on March 4, 2019 (the Form 10-K). The accompanying unaudited condensed consolidated financial statements include the accounts of La Jolla Pharmaceutical Company and its wholly-owned subsidiaries. All significant inter-company transactions and balances have been eliminated in consolidation. The unaudited condensed consolidated financial statements contain all normal recurring accruals and adjustments that, in the opinion of management, are necessary to present fairly the condensed consolidated balance sheet as of March 31, 2019, the condensed consolidated statements of operations for the three months ended March 31, 2019, the condensed consolidated statement of shareholder’s equity for the three months ended March 31, 2019 and the condensed consolidated statement of cash flows for the three months ended March 31, 2019.

The preparation of the Company’s unaudited condensed consolidated financial statements requires management to make estimates and assumptions that impact the reported amounts of assets, liabilities, revenue and expenses and the disclosure of contingent assets and liabilities in the Company’s unaudited condensed consolidated financial statements and the accompanying notes. Actual results may differ materially from these estimates. Certain amounts previously reported in the financial statements have been reclassified to conform to the current year presentation. Such reclassifications did not affect net loss, shareholders’ equity or cash flows. The results of operations for the three months ended March 31, 2019 are not necessarily indicative of the results to be expected for the full year or any future interim periods. The accompanying condensed consolidated balance sheet as of December 31, 2018 has been derived from the audited consolidated balance sheet as of December 31, 2018 contained in the Form 10-K.

Summary of Significant Accounting Policies

During the three months ended March 31, 2019, there have been no changes to the Company’s significant accounting policies as described in the Form 10-K, except as described below.

Leases

At lease commencement, the Company records a lease liability based on the present value of lease payments over the expected lease term. The Company calculates the present value of lease payments using the discount rate implicit in the lease,

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unless that rate cannot be readily determined. In that case, the Company uses its incremental borrowing rate, which is the rate of interest that the Company would have to pay to borrow on a collateralized basis an amount equal to the lease payments over the expected lease term. The Company records a corresponding right-of-use lease asset based on the lease liability, adjusted for any lease incentives received and any initial direct costs paid to the lessor prior to the lease commencement date.

After lease commencement, the Company measures its leases as follows: (i) the lease liability based on the present value of the remaining lease payments using the discount rate determined at lease commencement; and (ii) the right-of-use lease asset based on the remeasured lease liability, adjusted for any unamortized lease incentives received, any unamortized initial direct costs and the cumulative difference between rent expense and amounts paid under the lease agreement. Any lease incentives received and any initial direct costs are amortized on a straight-line basis over the expected lease term. Rent expense is recorded on a straight-line basis over the expected lease term.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash. The Company maintains its cash in checking and money market savings accounts at federally insured financial institutions in excess of federally insured limits.

The Company’s products are distributed in the U.S. through distributors and select wholesalers (collectively, customers) that resell its products to hospitals, the end users. The following table includes the percentage of net product sales and accounts receivable balances for the Company’s three major customers, each of which comprised 10% or more of its net product sales:

	Net Product Sales		Accounts Receivable
	Three Months Ended March 31, 2019		As of March 31, 2019
Customer A	34	%	29	%
Customer B	32	%	33	%
Customer C	30	%	29	%
Total	96	%	91	%

Net Loss per Share

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the period, without consideration of potential common shares. Diluted net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding plus potential common shares. Convertible preferred stock, stock options and warrants are considered potential common shares and are included in the calculation of diluted net loss per share using the treasury stock method when their effect is dilutive. Potential common shares are excluded from the calculation of diluted net loss per share when their effect is anti-dilutive. As of March 31, 2019 and 2018, there were 14.3 million shares and 14.1 million shares, respectively, of potential common shares, which were excluded from the calculation of diluted net loss per share because their effect was anti-dilutive.

Recent Accounting Pronouncements

In June 2018, the Financial Accounting Standards Board (FASB) issued ASU 2018-07, Stock Compensation (Topic 718): Improvements to Nonemployee Share-based Payment Accounting (ASU 2018-07). The standard expands the scope of Accounting Standards Codification (ASC) Topic 718 to include share-based payment awards granted to nonemployees in exchange for goods and services. ASU 2018-07 is effective for annual and interim reporting periods beginning after December 15, 2018.

In the first quarter 2019, the Company adopted ASU 2018-07. Prior to the adoption of ASU 2018-07, share-based payments awards granted to nonemployees were measured at fair value on their grant date, subject to periodic remeasurement, and share-based compensation expense was recognized on a straight-line basis over their vesting terms. After the adoption of ASU 2018-07, the fair value of share-based payment awards granted to nonemployees is not required to be remeasured periodically and share-based compensation expense will continue to be recorded on a straight-line basis over their vesting period, consistent with share-based payment awards granted to employees. As a result of the adoption of ASU 2018-07, the Company remeasured all of its outstanding nonemployee share-based payment awards at fair value and recognized a cumulative-effect adjustment of $0.2 million to accumulated deficit as of January 1, 2019.

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In February 2016, FASB issued ASU No. 2016-02. This guidance requires lessees to recognize operating leases with a term greater than one year on the balance sheet as a right-of-use asset and corresponding lease liability. ASU 2016-02 is effective for annual and interim reporting periods beginning after December 15, 2018. Although ASU 2016-02 is required to be adopted at the earliest period presented using a modified retrospective approach, the FASB issued ASU No. 2018-11, Leases (Topic 842): Targeted Improvements (“ASU 2018-11”), which allows for an alternative transition method of adoption by recognizing a cumulative-effect adjustment, if any, to the opening balance of retained earnings in the period of adoption.

The Company adopted ASU 2016-02 on January 1, 2019 utilizing the alternative transition method allowed for under ASU 2018-11. As a result, the Company recorded lease liabilities and right-of-use lease assets of $31.8 million and $16.8 million, respectively, on its balance sheet as of January 1, 2019. The lease liabilities represent the present value of the remaining lease payments of the Company’s corporate headquarters lease (see Note 5), discounted using the Company’s incremental borrowing rate as of January 1, 2019. The corresponding right-of-use lease assets are recorded based on the lease liabilities, adjusted for the unamortized lease incentives received and the cumulative difference between rent expense and amounts paid under the its corporate headquarters lease. The adoption of ASU 2016-02 did not have a material impact on either the statement of operations or statement of cash flows for the three months ended March 31, 2019.

3. Balance Sheet Account Details

Restricted Cash

Restricted cash as of March 31, 2019 and December 31, 2018 represents a standby letter of credit for the Company’s building lease in lieu of a security deposit during the term of such lease. There is a requirement to maintain $0.9 million of cash collateral in an account pledged as security for such letter of credit.

Inventory, Net

Inventory, net consisted of the following (in thousands):

	March 31, 2019		December 31, 2018
Work-in-process	$	1,839	$	1,907
Finished goods	138		113
Total inventory, net	$	1,977	$	2,020

As of March 31, 2019 and December 31, 2018, total inventory is recorded net of $0.8 million of inventory reserves.

Accrued Expenses

Accrued expenses consisted of the following (in thousands):

	March 31, 2019		December 31, 2018
Accrued clinical study costs	$	3,371	$	2,430
Accrued interest expense	2,676		2,260
Accrued manufacturing costs	1,775		1,823
Accrued other	1,750		1,972
Total accrued expenses	$	9,572	$	8,485

4. Company-wide Realignment

On October 18, 2018, the Company effected a Company-wide realignment to increase its efficiency and focus on achieving its corporate goals. For the year ended December 31, 2018, total expense for these activities was $4.0 million, with $1.6 million included in research and development expense and $2.4 million included in selling, general and administrative expense. Total expense was comprised of $7.7 million for severance costs, offset by a $3.7 million reversal of non-cash, stock-based compensation expense related to forfeited, unvested equity awards. As of March 31, 2019, all severance costs had been paid. No expense for these activities was recorded for the three months ended March 31, 2019.

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5. Leases

On December 29, 2016, the Company entered into an agreement with BMR-Axiom LP to lease office and laboratory space as its corporate headquarters located at 4550 Towne Centre Court, San Diego, California (Lease) for a period of 10 years commencing on October 30, 2017. The Company has an option to extend the Lease for an additional 5 years at the end of the initial term.

The Company provided a standby letter of credit for $0.9 million in lieu of a security deposit. This amount will decrease to $0.6 million after year two of the lease term and decrease to $0.3 million after year 5 of the lease term. As of March 31, 2019, $0.9 million was pledged as collateral for such letter of credit and recorded as restricted cash. The annual rent under the Lease is subject to escalation during the term. In addition to rent, the Lease requires the Company to pay certain taxes, insurance and operating costs relating to the leased premises. The Lease contains customary default provisions, representations, warranties and covenants. The Lease is classified as an operating lease.

Future minimum lease payments under the Lease as of March 31, 2019, are as follows (in thousands):

2019	$	2,963
2020	4,058
2021	4,174
2022	4,294
2023	4,417
Thereafter	18,134
Total future minimum lease payments	38,040
Less: discount	(6,881		)
Total lease liability	$	31,159

The Company recorded a lease liability and ROU lease asset for the Lease based on the present value of lease payments over the expected lease term, discounted using the Company’s incremental borrowing rate. The option to extend the Lease was not recognized as a part of the Company’s lease liability or ROU lease asset. The Company recorded $0.7 million of lease expense for each of the three months ended March 31, 2019 and 2018. Amortization for the right-of-use lease asset was $0.3 million for the three months ended March 31, 2019.

6. Deferred Royalty Obligation

On May 10, 2018, the Company closed a $125.0 million royalty financing agreement (the Royalty Agreement) with HealthCare Royalty Partners (HCR). Under the terms of the Royalty Agreement, the Company received $125.0 million in exchange for tiered royalty payments on worldwide net product sales of GIAPREZA. HCR is entitled to receive quarterly royalties on worldwide net product sales of GIAPREZA beginning April 1, 2018. Quarterly payments to HCR under the Royalty Agreement start at a maximum royalty rate, with step-downs based on the achievement of annual net product sales thresholds. Through December 31, 2021, the royalty rate will be a maximum of 10%. Starting January 1, 2022, the maximum royalty rate may increase by 4% if an agreed-upon, cumulative sales threshold has not been met, and, starting January 1, 2024, the maximum royalty rate may increase by an additional 4% if a different agreed-upon, cumulative sales threshold has not been met. The Royalty Agreement is subject to maximum aggregate royalty payments to HCR of 180% of the $125.0 million received by the Company, at which time the payment obligations under the Royalty Agreement would expire. The Royalty Agreement was entered into by the Company’s wholly-owned subsidiary, La Jolla Pharma, LLC, and HCR has no recourse under the Royalty Agreement against La Jolla Pharmaceutical Company or any assets other than GIAPREZA.

On receipt of the $125.0 million payment from HCR, the Company recorded a deferred royalty obligation of $125.0 million, net of issuance costs of $0.7 million. For the three months ended March 31, 2019, the Company recognized interest expense, including amortization of the obligation discount, of $2.7 million. The carrying value of the deferred royalty obligation as of March 31, 2019 was $124.3 million, net of unamortized obligation discount of $0.7 million, and was classified as noncurrent. The related accrued interest liability was $9.1 million and $6.8 million as of March 31, 2019 and December 31, 2018, respectively, of which $6.4 million and $4.5 million was classified as noncurrent as of March 31, 2019 and December 31, 2018, respectively. During the three months ended March 31, 2019, the Company made royalty payments to HCR of $0.4 million, and, as of March 31, 2019, the Company recorded royalty obligations payable of $0.4 million in accrued expenses.

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In the event of certain material breaches of the Royalty Agreement, HCR would have the right to terminate the Royalty Agreement and demand payment of an amount equal to either $125.0 million, minus aggregate royalties paid to HCR, or $225.0 million, minus aggregate royalties paid to HCR, depending on the type of breach. The Company concluded that certain of these contract provisions that could result in an acceleration of amounts due under the Royalty Agreement are embedded derivatives that require bifurcation from the deferred royalty obligation and fair value recognition. The Company determined the fair value of each derivative by assessing the probability of each event occurring, as well as the potential repayment amounts and timing of such repayments that would result under various scenarios. As a result of this assessment, the Company determined that the fair value of the embedded derivatives is immaterial as of March 31, 2019. Each reporting period, the Company estimates the fair value of the embedded derivatives until the features lapse and/or the termination of the Royalty Agreement. Any change in the fair value of the embedded derivatives will be recorded as either a gain or loss on the consolidated statements of operations.

7. Shareholders’ Equity

2018 Common Stock Offering

In March 2018, the Company offered and sold 3,910,000 shares of common stock in an underwritten public offering at a price of $29.50 per share for gross proceeds of approximately $115.3 million. The Company received proceeds of approximately $109.8 million, net of approximately $5.5 million in underwriting commissions, discounts and other issuance costs.

Preferred Stock

In January 2019, the Company issued 782,031 shares of common stock upon the conversion of 2,737 shares of Series F Convertible Preferred Stock. As of March 31, 2019, there were no shares of Series F Convertible Preferred Stock issued and outstanding.

Warrants

In March 2018, the Company issued 43,056 shares of common stock in a cashless exercise of 83,013 warrants to a third-party warrant holder. As of March 31, 2019, the Company had outstanding warrants to purchase 10,000 shares of common stock.

8. Equity Incentive Plans

2013 Equity Incentive Plan

A total of 8,100,000 shares of common stock have been reserved for future issuance under the La Jolla Pharmaceutical Company 2013 Equity Incentive Plan. As of March 31, 2019, 356,873 shares of common stock remained available for future grants under the 2013 Equity Plan.

2018 Employee Stock Purchase Plan

A total of 750,000 shares of common stock have been reserved for issuance under the La Jolla Pharmaceutical Company 2018 Employee Stock Purchase Plan (ESPP). As of March 31, 2019, 665,960 shares of common stock remained available for future grants under the ESPP.

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Equity Awards

The activity related to equity awards, which are comprised of stock options and an inducement grant (described below), is summarized as follows:

	Shares Underlying Stock Options		Weighted- average Exercise Price per Share
Outstanding at December 31, 2018	6,466,214		$	23.26
Granted(1)	1,764,041		$	6.06
Forfeited	(700,464	)	$	22.08
Outstanding at March 31, 2019	7,529,791		$	19.34

(1) In March 2019, the Company issued a stock option grant to the Company’s recently appointed Chief Commercial Officer to purchase 80,000 shares of common stock at an exercise price equal to the fair market value of the Company’s common stock on the grant date. The grant was awarded as an inducement grant outside of the 2013 Equity Plan. On the first anniversary of the grant date, 25% of the underlying shares become exercisable with the remaining shares vesting on a monthly basis over the subsequent three years subject to continued service during that time.

Share-based Compensation Expense

Total share-based compensation expense related to all share-based awards was comprised of the following (in thousands):

	Three Months Ended   March 31,
	2019		2018
Research and development	$	3,899	$	5,396
Selling, general and administrative	2,812		4,006
Total share-based compensation expense	$	6,711	$	9,402

As of March 31, 2019, $60.5 million of total unrecognized share-based compensation expense related to unvested stock options remains and is expected to be recognized over a weighted-average period of 2.7 years.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

In this report, all references to “we,” “our,” “us,” “La Jolla” and “the Company” refer to La Jolla Pharmaceutical Company, a California corporation, and our subsidiaries, including La Jolla Pharma, LLC, on a consolidated basis.

You should read the following discussion and analysis of our financial condition and results of operations together with our condensed financial statements and accompanying notes included in this Quarterly Report on Form 10-Q and our audited financial statements and accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2018 filed with the U.S. Securities and Exchange Commission (SEC) on March 4, 2019 (Form 10-K).

Forward-looking Statements

The forward-looking statements in this report involve significant risks, assumptions and uncertainties and a number of factors, both foreseen and unforeseen, which could cause actual results to differ materially from our current expectations. Forward-looking statements include those that express a plan, belief, expectation, estimation, anticipation, intent, contingency, future development or similar expression. Accordingly, you should not rely on forward-looking statements as predictions of future events. Forward-looking statements include, but are not limited to, statements regarding risks relating to: our ability to successfully commercialize, market and achieve market acceptance of GIAPREZA^TM (angiotensin II) and our product candidates; our ability to meet the demand for GIAPREZA in a timely manner; potential market sizes for our products and product candidates, including the market for the treatment of septic or distributive shock; the cost of producing GIAPREZA; unforeseen safety issues from the administration of GIAPREZA and our product candidates in patients; the timing and prospects for approval of GIAPREZA by the European Medicines Agency (EMA) or other regulatory authorities; the scope of product label(s) and potential market sizes, as well as the broader commercial opportunity for GIAPREZA and our product candidates; the impact of pharmaceutical industry regulation and healthcare legislation in the United States; the success of

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future development activities; the timing for commencement of preclinical studies and clinical trials; the anticipated timing for regulatory actions; the successful and timely completion of clinical studies; potential indications for which the Company’s product candidates may be developed; the anticipated treatment of future clinical data by the U.S. Food and Drug Administration (FDA), EMA and other regulatory authorities, including whether such data will be sufficient for approval; and the expected duration over which the Company’s cash balances will fund our operations. The outcomes of the events described in these forward-looking statements are subject to the risks, uncertainties and other factors described in the “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Risk Factors” sections contained in our Form 10-K, and in other reports and registration statements that we file with the SEC. We expressly disclaim any intent to update forward-looking statements.

Introduction

Management’s discussion and analysis of financial condition and results of operations is provided as a supplement to the accompanying unaudited condensed consolidated financial statements and notes, which are included in Item 1 of this Quarterly Report on Form 10-Q, to help provide an understanding of our financial condition, the changes in our financial condition and our results of operations. Our discussion is organized as follows:

• Business Overview. This section provides a general description of our business and significant events and transactions that we believe are important in understanding our financial condition and results of operations.

• Program Overview. This section provides an overview of GIAPREZA, LJPC-0118 and LJPC-401.

• Critical Accounting Policies and Estimates. This section provides a description of the material changes to our significant accounting policies, including the critical accounting policies and estimates, which are summarized in Note 2 to the accompanying unaudited condensed consolidated financial statements included in Item 1 of this Quarterly Report on Form 10-Q.

• Results of Operations. This section provides an analysis of our results of operations presented in the accompanying unaudited condensed consolidated statements of operations by comparing the results for the three months ended March 31, 2019 to the results for the three months ended March 31, 2018.

• Liquidity and Capital Resources. This section provides an analysis of our historical cash flows, as well as our future capital requirements.

Business Overview

La Jolla Pharmaceutical Company is a biopharmaceutical company focused on the discovery, development and commercialization of innovative therapies intended to significantly improve outcomes in patients suffering from life-threatening diseases. GIAPREZA^TM (angiotensin II), formerly known as LJPC-501, was approved by the U.S. Food and Drug Administration (FDA) on December 21, 2017 as a vasoconstrictor indicated to increase blood pressure in adults with septic or other distributive shock. LJPC-0118 is La Jolla’s investigational product for the treatment of severe malaria. LJPC-401 (synthetic human hepcidin), a clinical-stage investigational product, is being developed for the potential treatment of conditions characterized by iron overload, such as hereditary hemochromatosis, beta thalassemia, sickle cell disease, myelodysplastic syndrome and polycythemia vera.

Program Overview

GIAPREZA^TM (angiotensin II)

GIAPREZA^TM (angiotensin II), injection for intravenous infusion, was approved by the FDA on December 21, 2017 as a vasoconstrictor indicated to increase blood pressure in adults with septic or other distributive shock. Angiotensin II is a major bioactive component of the renin-angiotensin-aldosterone system (RAAS). The RAAS is one of three central regulators of blood pressure. In March 2018, we announced the commercial availability of GIAPREZA. GIAPREZA is available in 1 mL single-dose vials, each containing 2.5 mg of angiotensin II (as a sterile liquid) through authorized specialty distributors and select wholesalers.

More than 1 million Americans are affected by shock on an annual basis, with 1 in 3 patients being treated for shock in the intensive care unit. Distributive shock is the most common type of shock in the inpatient setting with approximately 800,000 distributive shock cases in the U.S. each year. Of these cases, an estimated 90% are septic shock patients. Approximately 300,000 do not achieve adequate blood pressure response with standard-of-care vasopressor therapy (catecholamines and vasopressin). The inability to achieve or maintain adequate blood pressure results in inadequate blood flow to the body’s organs and tissue and is associated with a mortality rate exceeding most acute conditions requiring

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hospitalization. In the European Union (EU), the annual incidence of sepsis in adults is estimated to be more than 500,000, with more than 170,000 progressing to septic shock.

The GIAPREZA clinical development program included a Phase 3 study of GIAPREZA in adult patients with septic or other distributive shock who remained hypotensive despite fluid and vasopressor therapy, known as the ATHOS-3 (Angiotensin II for the Treatment of High-Output Shock) Phase 3 study. In ATHOS-3, patients were randomized in a 1:1 fashion to receive either: (i) GIAPREZA plus standard-of-care vasopressors; or (ii) placebo plus standard-of-care vasopressors. ATHOS-3 completed enrollment of 344 patients in the fourth quarter of 2016. In February 2017, we reported positive top-line results from ATHOS-3, and, in May 2017, the results of ATHOS-3 were published by The New England Journal of Medicine.

The analysis of the primary efficacy endpoint, defined as the percentage of patients achieving a pre-specified target blood pressure response, was highly statistically significant: 23% of the 158 placebo-treated patients had a blood pressure response compared to 70% of the 163 GIAPREZA-treated patients (p<0.00001). In addition, there was a consistent trend toward longer survival over the 28-day study period: 22% reduction in mortality risk through day 28 [hazard ratio=0.78 (0.57-1.07), p=0.12] for GIAPREZA-treated patients.

In this critically ill patient population: 92% of placebo-treated patients compared to 87% of GIAPREZA-treated patients experienced at least one adverse event, and 22% of placebo-treated patients compared to 14% of GIAPREZA-treated patients discontinued treatment due to an adverse event.

In June 2018, we announced that the Marketing Authorization Application (MAA) for GIAPREZA was validated by the EMA. Validation of the MAA confirms that the submission is complete and starts the EMA’s centralized review process. This followed our announcement in September 2017, in which we reported that the EMA’s Committee for Medicinal Products for Human Use (CHMP) issued favorable Scientific Advice regarding the EU regulatory pathway for GIAPREZA. We expect a decision on the GIAPREZA MAA by the EMA in June 2019. If approved, GIAPREZA could be available for marketing in the EU in early 2020.

LJPC-0118

LJPC-0118 is an investigational product for the treatment of severe malaria. The active pharmaceutical ingredient in LJPC-0118 was demonstrated to be superior to quinine in reducing mortality in patients with severe falciparum malaria infection in two randomized, controlled, clinical studies. Severe malaria is a serious and sometimes fatal disease caused by a parasite that commonly infects a certain type of mosquito, which feeds on humans. Symptoms include, but are not limited to: fever, chills, sweating, hypoglycemia and shock. Severe malaria is often complicated by central nervous system infections that may lead to delirium, which may progress to coma. Infections usually occur a few weeks after being bitten. In 2017, an estimated 219 million cases of malaria occurred worldwide, with an estimated 200 million of these cases occurring in the World Health Organization (WHO) African Region, and, in 2013, the global annual incidence of severe malaria was estimated to be 2 million cases. In 2017, an estimated 435,000 people died from malaria worldwide.

In April 2019, we announced that we have been granted Breakthrough Therapy designation from the FDA for LJPC-0118. Breakthrough Therapy designation is designed to expedite the development and review of drugs that are intended to treat serious or life-threatening diseases and for which preliminary clinical evidence indicates substantial improvement over available therapies on clinically significant endpoint(s).

We plan to file an NDA for LJPC-0118 with the FDA in the fourth quarter of 2019.

LJPC-401

LJPC-401, a clinical-stage investigational product, is our proprietary formulation of synthetic human hepcidin. Hepcidin, an endogenous peptide hormone, is the body’s naturally occurring regulator of iron absorption and distribution. In healthy individuals, hepcidin prevents excessive iron accumulation in vital organs, such as the liver and heart, where it can cause significant damage and even result in death. We are developing LJPC-401 for the potential treatment of iron overload, which occurs as a result of primary iron overload diseases such as hereditary hemochromatosis (HH), or secondary iron overload diseases such as beta thalassemia (BT), sickle cell disease (SCD), myelodysplastic syndrome (MDS) and polycythemia vera.

HH is a disease characterized by a genetic deficiency in hepcidin. HH is the most common genetic disease in Caucasians and causes liver cirrhosis, liver cancer, heart disease and/or failure, diabetes, arthritis and joint pain. There are no FDA approved therapies for HH and the current standard treatment for HH is a blood removal procedure known as phlebotomy.

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Each phlebotomy procedure, which is usually conducted at a hospital, medical office or blood center, typically involves the removal of approximately one pint of blood. The required frequency of procedures varies by patient but often ranges from one to two times per week for an initial period after diagnosis and once every one to three months for life. Since most of the body’s iron is stored in red blood cells, chronic removal of blood can effectively lower iron levels if a phlebotomy regimen is adhered to. However, phlebotomy procedures may cause and may be associated with pain, bruising and scarring at the venous puncture site, joint pain, fatigue and dizziness during and following the procedure and disruption of daily activities. Furthermore, phlebotomy is not appropriate in patients with poor venous access, anemia or heart disease.

BT, SCD and MDS are genetic diseases of blood cells that can cause life-threatening anemia and usually require frequent and life-long blood transfusions. These blood transfusions cause excessive iron accumulation in the body, which is toxic to vital organs, such as the liver and heart. In addition, the underlying anemia causes excessive iron accumulation independent of blood transfusions.

In 2015, the EMA Committee for Orphan Medicinal Products (COMP) designated LJPC-401 as an orphan medicinal product for the treatment of beta thalassemia intermedia and major. In 2016, the EMA COMP designated LJPC-401 as an orphan medicinal product for the treatment of SCD.

In September 2016, we reported positive results from a Phase 1 study of LJPC-401 in patients at risk of iron overload suffering from HH, thalassemia and SCD. In this study, single, escalating doses of LJPC-401 were associated with a dose-dependent, statistically significant reduction in serum iron. LJPC-401 was well-tolerated with no dose-limiting toxicities. Injection-site reactions were the most commonly reported adverse event and were all mild or moderate in severity, self-limiting and fully resolved.

In June 2018, two presentations on LJPC-401 were given at the 23rd Congress of the European Hematology Association (EHA). The first was an oral presentation, entitled “A Phase 1, Open-Label Study to Determine the Safety, Tolerability, and Pharmacokinetics of Escalating Doses of LJPC-401 (Synthetic Human Hepcidin) in Patients with Iron Overload.” The second was a poster presentation, entitled “A Phase 1, Placebo-Controlled Study to Determine the Safety, Tolerability, and Pharmacokinetics of Escalating Subcutaneous Doses of LJPC-401 (Synthetic Human Hepcidin) in Healthy Adults.”

LJPC-401 is currently the subject of two clinical studies, LJ401-HH01 in patients with HH and LJ401-BT01 in patients with BT.

LJ401-HH01

In December 2017, we announced the initiation of LJ401-HH01, a Phase 2 clinical study of LJPC‑401 in patients with HH. LJ401-HH01 is a multinational, multicenter, randomized, Phase 2 study that is designed to evaluate the safety and efficacy of LJPC-401 as a treatment for HH. The primary efficacy endpoint of the study is the change in transferrin saturation, a standard measurement of iron levels in the body and one of the two key measurements used to detect iron overload, from baseline to end of treatment. Secondary efficacy endpoints include: (i) the change in serum ferritin, the other key measurement used to detect iron overload, from baseline to end of treatment; and (ii) the requirement for and frequency of phlebotomy procedures used during the study.

We expect to disclose the top-line results of LJ401-HH01 in the second half of 2019.

LJ401-BT01

In September 2016, we announced that we reached agreement with the EMA on the design of a pivotal study of LJPC-401 for the treatment of BT patients suffering from iron overload, a major unmet need in an orphan patient population. In December 2017, we announced the initiation of LJ401-BT01, a pivotal, multinational, multicenter, randomized, controlled study that is designed to evaluate the safety and efficacy of LJPC-401 as a treatment for BT patients who, despite chelation therapy, have cardiac iron levels above normal. The primary efficacy endpoint of this study is the change in iron content in the heart after 6 months, as measured by cardiac magnetic resonance imaging (MRI). If this study is successful, we would anticipate filing an MAA for LJPC-401 in the EU.

We expect to disclose the top-line results of LJ401-BT01 in mid-2020.

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Critical Accounting Policies and Estimates

The discussion and analysis of our financial condition and results of operations are based on our unaudited condensed consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles (GAAP). The preparation of these unaudited condensed consolidated financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. We evaluate our estimates on an ongoing basis. We base our estimates on historical experience and on other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ materially from these estimates under different assumptions or conditions.

There have been no material changes to the critical accounting policies as previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2018, which was filed on March 4, 2019, except for the leases policy disclosed in Note 2 to the accompanying unaudited condensed consolidated financial statements included in Item 1 of this Quarterly Report on Form 10-Q.

Recent Accounting Pronouncements

Recent accounting pronouncements are disclosed in Note 2 to the accompanying unaudited condensed consolidated financial statements included in Item 1 of this Quarterly Report on Form 10-Q.

Results of Operations

The following table summarizes our results of operations for each of the periods below (in thousands):

	Three Months Ended March 31,
	2019			2018
Net product sales	$	4,395		$	809
Cost of product sales	(500		)	(58		)
Research and development expense	(21,244		)	(28,429		)
Selling, general and administrative expense	(12,320		)	(23,016		)
Other (expense) income, net	(2,016		)	166
Net loss	$	(31,685	)	$	(50,528	)

Net Product Sales

For the three months ended March 31, 2019, GIAPREZA net product sales were $4.4 million compared to $0.8 million for the same period in 2018.

Cost of Product Sales

For the three months ended March 31, 2019, we recognized cost of product sales of $0.5 million compared to $0.1 million for the same period in 2018. Cost of product sales primarily included royalty and product manufacturing costs.

Prior to approval by the FDA, approximately $0.6 million of direct material costs to manufacture GIAPREZA were recorded to research and development expense in 2017. As of March 31, 2019, inventory excludes approximately $0.2 million of manufacturing costs that were recorded to research and development expense prior to FDA approval.

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Research and Development Expense

The following table summarizes our research and development expense for each of the periods below (in thousands):

	Three Months Ended   March 31,
	2019		2018
Clinical development costs	$	7,013	$	9,793
Personnel and related costs	6,696		9,164
Share-based compensation expense	3,899		5,396
Other research and development costs	3,636		4,076
Total research and development expense	$	21,244	$	28,429

During the three months ended March 31, 2019, research and development expense decreased to $21.2 million from $28.4 million for the same period in 2018. The decrease was primarily due to reduced clinical development costs, personnel and related costs and share-based compensation expense as a result of our Company-wide realignment in October 2018. We do not expect research and development expense to increase significantly in the near term.

Selling, General and Administrative Expense

The following table summarizes our selling, general and administrative expense for each of the periods below (in thousands):

	Three Months Ended   March 31,
	2019		2018
Personnel and related costs	$	5,522	$	9,586
Share-based compensation expense	2,812		4,006
Selling and marketing costs	2,021		7,096
General and administrative costs	1,965		2,328
Total selling, general and administrative expense	$	12,320	$	23,016

During the three months ended March 31, 2019, selling, general and administrative expense decreased to $12.3 million from $23.0 million for the same period in 2018. The decrease was due to reduced personnel and related costs and share-based compensation as a result of our Company-wide realignment in October 2018. We do not expect selling, general and administrative expense to increase significantly in the near term.

Other (Expense) Income, Net

During the three months ended March 31, 2019, other expense increased to $2.0 million of expense from $0.2 million of income for the same period in 2018. The increase in expense was due to interest accrued for our deferred royalty obligation.

Liquidity and Capital Resources

Since January 2012, when the Company was effectively restarted with new assets and a new management team, through March 31, 2019, our cash used in operating activities was $373.6 million. From inception through March 31, 2019, we have incurred a cumulative net loss of $952.5 million and have financed our operations through public and private offerings of securities, a royalty financing, revenues from collaborative agreements and net product sales, equipment financings and interest income on invested cash balances. As of March 31, 2019, we had $140.0 million in cash and cash equivalents, compared to $172.6 million of cash and cash equivalents at December 31, 2018. The Company had no debt as of March 31, 2019 and December 31, 2018. Based on our current operating plans and projections, we believe that our cash and cash equivalents as of March 31, 2019 will be sufficient to fund operations for at least one year from the date this Quarterly Report on Form 10-Q is filed with the SEC.

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Cash used for operating activities for the three months ended March 31, 2019, was $32.7 million compared to $45.9 million for the same period in 2018. The decrease in cash used for operating activities was a result of the decrease in our net loss, primarily offset by changes in working capital.

Cash used for investing activities for the three months ended March 31, 2019, was $0.2 million compared to $1.0 million for the same period in 2018. Net cash used in investing activities was the result of purchases of property and equipment.

Cash provided by financing activities for the three months ended March 31, 2019, was $0.3 million compared to $110.3 million for the same period in 2018. The decrease in cash provided by financing activities was primarily the result of $109.8 million of net proceeds from the March 2018 common stock offering.

Contractual Obligations

In May 2018, we closed a $125.0 million royalty financing agreement (the Royalty Agreement) with HealthCare Royalty Partners (HCR). Under the terms of the Royalty Agreement, we received $125.0 million in exchange for tiered royalty payments on worldwide net product sales of GIAPREZA. HCR is entitled to receive quarterly royalties on worldwide net product sales of GIAPREZA beginning April 1, 2018. Quarterly payments to HCR under the Royalty Agreement start at a maximum royalty rate, with step-downs based on the achievement of annual net product sales thresholds. Through December 31, 2021, the royalty rate will be a maximum of 10%. Starting January 1, 2022, the maximum royalty rate may increase by 4% if an agreed-upon, cumulative sales threshold has not been met, and, starting January 1, 2024, the maximum royalty rate may increase by an additional 4% if a different agreed-upon, cumulative sales threshold has not been met. The Royalty Agreement is subject to maximum aggregate royalty payments to HCR of 180% of the $125.0 million received by us, at which time the payment obligations under the Royalty Agreement would expire. The Royalty Agreement was entered into by our wholly owned subsidiary, La Jolla Pharma, LLC, and HCR has no recourse under the Royalty Agreement against us or any assets other than GIAPREZA.

In December 2014, we entered into a patent license agreement with the George Washington University (GW), which the parties amended and restated on March 1, 2016. Pursuant to the amended and restated license agreement, GW exclusively licensed to us certain intellectual property rights relating to GIAPREZA, including the exclusive rights to certain issued patents and patent applications covering GIAPREZA. Under the license agreement, we are obligated to use commercially reasonable efforts to develop, commercialize, market and sell GIAPREZA. We have paid a one-time license initiation fee, annual maintenance fees, an amendment fee, additional payments following the achievement of certain development and regulatory milestones, and royalty payments. We may be obligated to make additional milestone payments of up to $0.5 million in the aggregate. Following the commencement of commercial sales of GIAPREZA, we are obligated to pay tiered royalties in the low- to mid-single digits on products covered by the licensed rights. The patents and patent applications covered by the GW license agreement are expected to expire between 2029 and 2038, and the obligation to pay royalties under this agreement extends through the last-to-expire patent covering GIAPREZA.    

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements that have, or are reasonably likely to have, a current or future effect on our financial condition, changes in our financial condition, expenses, results of operations, liquidity, capital expenditures or capital resources.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are a smaller reporting company, as defined by Rule 12b-2 under the Securities and Exchange Act of 1934 and in Item 10(f)(1) of Regulation S-K, and are not required to provide the information under this item.

ITEM 4. CONTROLS AND PROCEDURES

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our reports, filed under the Securities Exchange Act of 1934, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable and not absolute assurance of achieving the desired control objectives. In reaching a reasonable level of assurance, management was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. In addition, the design of any

16

system of controls is also based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, a control may become inadequate because of changes in conditions or the degree of compliance with policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

As required by the SEC Rule 13a-15(b), we carried out an evaluation under the supervision and with the participation of our management, including our chief executive officer and chief financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the period covered by this report. Based on the foregoing, our chief executive officer and chief financial officer concluded that our disclosure controls and procedures were effective at the reasonable assurance level.

Other than controls implemented in connection with the newly adopted lease policy as disclosed in Note 2 to the accompanying unaudited condensed consolidated financial statements included in Item 1 of this Quarterly Report on Form 10-Q, there has been no change in our internal control over financial reporting during our most recent quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

In the ordinary course of business, we may face various claims brought by third parties. Any of these claims could subject us to costly litigation. As of the date of this report, we are not currently a party to any legal proceedings that we believe could have a material adverse effect on our business, financial condition or results of operations. However, litigation is inherently uncertain, and any judgment or injunctive relief entered against us or any adverse settlement could negatively affect our business, financial condition and results of operations.

ITEM 1A. RISK FACTORS

No material changes to risk factors have occurred as previously disclosed in Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2018, filed with the SEC on March 4, 2019.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

None.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None.

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ITEM 6. EXHIBITS

Exhibit Number	Description
31.1	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification 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

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

		La Jolla Pharmaceutical Company
Date:	May 6, 2019	/s/    George Tidmarsh
		George Tidmarsh, M.D., Ph.D.
		President and Chief Executive Officer
		(Principal Executive Officer)
		/s/    Dennis Mulroy
		Dennis Mulroy
		Chief Financial Officer
		(Principal Financial and Accounting Officer)

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EX-31.1

EXHIBIT 31.1

SECTION 302 CERTIFICATION

I, George Tidmarsh, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of La Jolla Pharmaceutical Company;

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(s) 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 annual 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(s) 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:	May 6, 2019	/s/ George Tidmarsh
		George Tidmarsh, M.D., Ph.D.
		President, Chief Executive Officer and Secretary
		(Principal Executive Officer)

EX-31.2

EXHIBIT 31.2

SECTION 302 CERTIFICATION

I, Dennis Mulroy, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of La Jolla Pharmaceutical Company;

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(s) 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 annual 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(s) 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:	May 6, 2019	/s/ Dennis Mulroy
		Dennis Mulroy
		Chief Financial Officer
		(Principal Financial and Accounting Officer)

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Each of the undersigned, in his capacity as an officer of La Jolla Pharmaceutical Company (Registrant), hereby certifies, for purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

• the Quarterly Report of the Registrant on Form 10-Q for the quarter ended March 31, 2019 (Report), which accompanies this certification, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

• the information contained in the Report fairly presents, in all material respects, the financial condition of the Registrant at the end of such quarter and the results of operations of the Registrant for such quarter.

Date:	May 6, 2019	/s/ George Tidmarsh
		George Tidmarsh, M.D., Ph.D.
		President, Chief Executive Officer and Secretary
		(Principal Executive Officer)
		/s/ Dennis Mulroy
		Dennis Mulroy
		Chief Financial Officer
		(Principal Financial and Accounting Officer)

Note: A signed original of this written statement required by Section 906 has been provided to La Jolla Pharmaceutical Company and will be retained by La Jolla Pharmaceutical Company and furnished to the Securities and Exchange Commission or its staff upon request.

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Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 25, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	LA JOLLA PHARMACEUTICAL CO
Entity Central Index Key	0000920465
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		27,098,778

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Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 140,017	$ 172,604
Accounts receivable, net	1,999	1,381
Inventory, net	1,977	2,020
Prepaid expenses and other current assets	5,139	5,111
Total current assets	149,132	181,116
Property and equipment, net	21,306	22,267
Right-of-use lease asset	16,482
Restricted cash	909	909
Total assets	187,829	204,292
Current liabilities:
Accounts payable	3,041	8,572
Accrued expenses	9,572	8,485
Accrued payroll and related expenses	2,036	7,509
Deferred rent, current portion	0	1,370
Lease liability, current portion	2,587
Total current liabilities	17,236	25,936
Deferred rent, less current portion	0	13,609
Lease liability, less current portion	28,572
Deferred royalty obligation, net	124,336	124,323
Other noncurrent liabilities	6,384	4,503
Total liabilities	176,528	168,371
Shareholders’ equity:
Common Stock, $0.0001 par value; 100,000,000 shares authorized, 27,093,026 and 26,259,254 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	3	3
Additional paid-in capital	959,900	950,258
Accumulated deficit	(952,508)	(920,983)
Total shareholders’ equity	11,301	35,921
Total liabilities and shareholders’ equity	187,829	204,292
Series C-1 Convertible Preferred Stock [Member]
Shareholders’ equity:
Convertible preferred stock, value	3,906	3,906
Series F Convertible Preferred Stock [Member]
Shareholders’ equity:
Convertible preferred stock, value	$ 0	$ 2,737

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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Common stock, par value (usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	27,093,026	26,259,254
Common stock, shares outstanding (in shares)	27,093,026	26,259,254
Series C-1 Convertible Preferred Stock [Member]
Preferred stock, par value (usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	11,000	11,000
Preferred stock, shares issued (in shares)	3,906	3,906
Preferred stock, shares outstanding (in shares)	3,906	3,906
Preferred stock, liquidation	$ 3,906	$ 3,906
Series F Convertible Preferred Stock [Member]
Preferred stock, par value (usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000	10,000
Preferred stock, shares issued (in shares)	0	2,737
Preferred stock, shares outstanding (in shares)	0	2,737
Preferred stock, liquidation	$ 0	$ 2,737

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Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue
Net product sales	$ 4,395	$ 809
Total revenue	4,395	809
Operating expenses
Cost of product sales	500	58
Research and development	21,244	28,429
Selling, general and administrative	12,320	23,016
Total operating expenses	34,064	51,503
Loss from operations	(29,669)	(50,694)
Interest expense	(2,729)	0
Interest income	713	166
Total other (expense) income, net	(2,016)	166
Net loss	$ (31,685)	$ (50,528)
Net loss per share, basic and diluted (usd per share)	$ (1.17)	$ (2.22)
Weighted-average common shares outstanding - basic and diluted (in shares)	27,035	22,742

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Unaudited Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock [Member] Series C-1 Convertible Preferred Stock [Member]	Preferred Stock [Member] Series F Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings
Beginning Balance (in shares) at Dec. 31, 2017		4	3	22,167
Beginning Balance at Dec. 31, 2017	$ 88,202	$ 3,906	$ 2,737	$ 2	$ 803,071	$ (721,514)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	9,402				9,402
Issuance of common stock for conversion of Series F Preferred Stock (in shares)				3,910
Issuance of common stock for conversion of Series F Preferred Stock	109,809			$ 1	109,808
Exercise of stock options for common stock (in shares)				77
Exercise of stock options for common stock	528				528
Net loss	(50,528)					(50,528)
Ending Balance (in shares) at Mar. 31, 2018		4	3	26,154
Ending Balance at Mar. 31, 2018	157,413	$ 3,906	$ 2,737	$ 3	922,809	(772,042)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of ASU 2018-07	0
Beginning Balance (in shares) at Dec. 31, 2018		4	3	26,259
Beginning Balance at Dec. 31, 2018	35,921	$ 3,906	$ 2,737	$ 3	950,258	(920,983)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	6,782				6,782
Issuance of common stock under ESPP (in shares)				52
Issuance of common stock under ESPP	283				283
Issuance of common stock for conversion of Series F Preferred Stock (in shares)			(3)	782
Issuance of common stock for conversion of Series F Preferred Stock			$ (2,737)		2,737
Net loss	(31,685)					(31,685)
Ending Balance (in shares) at Mar. 31, 2019		4	0	27,093
Ending Balance at Mar. 31, 2019	11,301	$ 3,906	$ 0	$ 3	$ 959,900	$ (952,508)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment from adoption of ASU 2018-07	$ (160)

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Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities
Net loss	$ (31,685)	$ (50,528)
Adjustments to reconcile net loss to net cash used for operating activities:
Share-based compensation expense	6,711	9,402
Depreciation expense	1,130	992
Loss on disposal of equipment	15	132
Accretion of right-of-use lease asset	(302)
Non-cash interest expense	2,310	0
Changes in operating assets and liabilities:
Accounts receivable, net	(618)	0
Inventory, net	43	(820)
Prepaid expenses and other current assets	(28)	(3,179)
Accounts payable	(5,531)	(4,163)
Accrued expenses	742	3,577
Accrued payroll and related expenses	(5,473)	(1,951)
Deferred rent	0	688
Net cash used for operating activities	(32,686)	(45,850)
Investing activities
Purchase of property and equipment	(184)	(994)
Net cash used for investing activities	(184)	(994)
Financing activities
Proceeds from the issuance of common stock under ESPP	283	0
Net proceeds from the issuance of common stock	0	109,809
Net proceeds from the exercise of stock options for common stock	0	528
Net cash provided by financing activities	283	110,337
Net (decrease) increase in cash, cash equivalents and restricted cash	(32,587)	63,493
Cash, cash equivalents and restricted cash at beginning of period	173,513	91,824
Cash, cash equivalents and restricted cash at end of period	140,926	155,317
Supplemental disclosure of non-cash investing and financing activities:
Noncash Or Part Noncash Transaction, Conversion Of Preferred Stock, Common Stock	2,737	0
Initial recognition of right-of-use lease asset	16,798
Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets
Total cash, cash equivalents and restricted cash	$ 173,513	$ 91,824

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Basis of Presentation and Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation and Summary of Significant Accounting Policies

Basis of Presentation and Use of Estimates

The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of U.S. Securities and Exchange Commission (SEC) Regulation S-X. Accordingly, they should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2018 included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018, filed with the SEC on March 4, 2019 (the Form 10-K). The accompanying unaudited condensed consolidated financial statements include the accounts of La Jolla Pharmaceutical Company and its wholly-owned subsidiaries. All significant inter-company transactions and balances have been eliminated in consolidation. The unaudited condensed consolidated financial statements contain all normal recurring accruals and adjustments that, in the opinion of management, are necessary to present fairly the condensed consolidated balance sheet as of March 31, 2019, the condensed consolidated statements of operations for the three months ended March 31, 2019, the condensed consolidated statement of shareholder’s equity for the three months ended March 31, 2019 and the condensed consolidated statement of cash flows for the three months ended March 31, 2019.

The preparation of the Company’s unaudited condensed consolidated financial statements requires management to make estimates and assumptions that impact the reported amounts of assets, liabilities, revenue and expenses and the disclosure of contingent assets and liabilities in the Company’s unaudited condensed consolidated financial statements and the accompanying notes. Actual results may differ materially from these estimates. Certain amounts previously reported in the financial statements have been reclassified to conform to the current year presentation. Such reclassifications did not affect net loss, shareholders’ equity or cash flows. The results of operations for the three months ended March 31, 2019 are not necessarily indicative of the results to be expected for the full year or any future interim periods. The accompanying condensed consolidated balance sheet as of December 31, 2018 has been derived from the audited consolidated balance sheet as of December 31, 2018 contained in the Form 10-K.

Summary of Significant Accounting Policies

During the three months ended March 31, 2019, there have been no changes to the Company’s significant accounting policies as described in the Form 10-K, except as described below.

Leases

At lease commencement, the Company records a lease liability based on the present value of lease payments over the expected lease term. The Company calculates the present value of lease payments using the discount rate implicit in the lease, unless that rate cannot be readily determined. In that case, the Company uses its incremental borrowing rate, which is the rate of interest that the Company would have to pay to borrow on a collateralized basis an amount equal to the lease payments over the expected lease term. The Company records a corresponding right-of-use lease asset based on the lease liability, adjusted for any lease incentives received and any initial direct costs paid to the lessor prior to the lease commencement date.

After lease commencement, the Company measures its leases as follows: (i) the lease liability based on the present value of the remaining lease payments using the discount rate determined at lease commencement; and (ii) the right-of-use lease asset based on the remeasured lease liability, adjusted for any unamortized lease incentives received, any unamortized initial direct costs and the cumulative difference between rent expense and amounts paid under the lease agreement. Any lease incentives received and any initial direct costs are amortized on a straight-line basis over the expected lease term. Rent expense is recorded on a straight-line basis over the expected lease term.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash. The Company maintains its cash in checking and money market savings accounts at federally insured financial institutions in excess of federally insured limits.

The Company’s products are distributed in the U.S. through distributors and select wholesalers (collectively, customers) that resell its products to hospitals, the end users. The following table includes the percentage of net product sales and accounts receivable balances for the Company’s three major customers, each of which comprised 10% or more of its net product sales:

	Net Product Sales		Accounts Receivable
	Three Months Ended March 31, 2019		As of March 31, 2019
Customer A	34	%	29	%
Customer B	32	%	33	%
Customer C	30	%	29	%
Total	96	%	91	%

Net Loss per Share

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the period, without consideration of potential common shares. Diluted net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding plus potential common shares. Convertible preferred stock, stock options and warrants are considered potential common shares and are included in the calculation of diluted net loss per share using the treasury stock method when their effect is dilutive. Potential common shares are excluded from the calculation of diluted net loss per share when their effect is anti-dilutive. As of March 31, 2019 and 2018, there were 14.3 million shares and 14.1 million shares, respectively, of potential common shares, which were excluded from the calculation of diluted net loss per share because their effect was anti-dilutive.

Recent Accounting Pronouncements

In June 2018, the Financial Accounting Standards Board (FASB) issued ASU 2018-07, Stock Compensation (Topic 718): Improvements to Nonemployee Share-based Payment Accounting (ASU 2018-07). The standard expands the scope of Accounting Standards Codification (ASC) Topic 718 to include share-based payment awards granted to nonemployees in exchange for goods and services. ASU 2018-07 is effective for annual and interim reporting periods beginning after December 15, 2018.

In the first quarter 2019, the Company adopted ASU 2018-07. Prior to the adoption of ASU 2018-07, share-based payments awards granted to nonemployees were measured at fair value on their grant date, subject to periodic remeasurement, and share-based compensation expense was recognized on a straight-line basis over their vesting terms. After the adoption of ASU 2018-07, the fair value of share-based payment awards granted to nonemployees is not required to be remeasured periodically and share-based compensation expense will continue to be recorded on a straight-line basis over their vesting period, consistent with share-based payment awards granted to employees. As a result of the adoption of ASU 2018-07, the Company remeasured all of its outstanding nonemployee share-based payment awards at fair value and recognized a cumulative-effect adjustment of $0.2 million to accumulated deficit as of January 1, 2019.

In February 2016, FASB issued ASU No. 2016-02. This guidance requires lessees to recognize operating leases with a term greater than one year on the balance sheet as a right-of-use asset and corresponding lease liability. ASU 2016-02 is effective for annual and interim reporting periods beginning after December 15, 2018. Although ASU 2016-02 is required to be adopted at the earliest period presented using a modified retrospective approach, the FASB issued ASU No. 2018-11, Leases (Topic 842): Targeted Improvements (“ASU 2018-11”), which allows for an alternative transition method of adoption by recognizing a cumulative-effect adjustment, if any, to the opening balance of retained earnings in the period of adoption.

The Company adopted ASU 2016-02 on January 1, 2019 utilizing the alternative transition method allowed for under ASU 2018-11. As a result, the Company recorded lease liabilities and right-of-use lease assets of $31.8 million and $16.8 million, respectively, on its balance sheet as of January 1, 2019. The lease liabilities represent the present value of the remaining lease payments of the Company’s corporate headquarters lease (see Note 5), discounted using the Company’s incremental borrowing rate as of January 1, 2019. The corresponding right-of-use lease assets are recorded based on the lease liabilities, adjusted for the unamortized lease incentives received and the cumulative difference between rent expense and amounts paid under the its corporate headquarters lease. The adoption of ASU 2016-02 did not have a material impact on either the statement of operations or statement of cash flows for the three months ended March 31, 2019.

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Business

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Business

Business

La Jolla Pharmaceutical Company (collectively with its wholly-owned subsidiaries, the Company) is a biopharmaceutical company focused on the discovery, development and commercialization of innovative therapies intended to significantly improve outcomes in patients suffering from life-threatening diseases. GIAPREZA^TM (angiotensin II), formerly known as LJPC-501, was approved by the U.S. Food and Drug Administration (FDA) on December 21, 2017 as a vasoconstrictor indicated to increase blood pressure in adults with septic or other distributive shock. LJPC-0118 is La Jolla’s investigational product for the treatment of severe malaria. LJPC-401 (synthetic human hepcidin), a clinical-stage investigational product, is being developed for the potential treatment of conditions characterized by iron overload, such as hereditary hemochromatosis, beta thalassemia, sickle cell disease, myelodysplastic syndrome and polycythemia vera.

As of March 31, 2019, the Company had $140.0 million in cash and cash equivalents, compared to $172.6 million in cash and cash equivalents as of December 31, 2018. Based on the Company’s current operating plans and projections, the Company expects that its cash and cash equivalents as of March 31, 2019 will be sufficient to fund operations for at least one year from the date this Quarterly Report on Form 10-Q is filed with the SEC.

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Balance Sheet Account Details

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Balance Sheet Account Details

Balance Sheet Account Details

Restricted Cash

Restricted cash as of March 31, 2019 and December 31, 2018 represents a standby letter of credit for the Company’s building lease in lieu of a security deposit during the term of such lease. There is a requirement to maintain $0.9 million of cash collateral in an account pledged as security for such letter of credit.

Inventory, Net

Inventory, net consisted of the following (in thousands):

	March 31, 2019		December 31, 2018
Work-in-process	$	1,839	$	1,907
Finished goods	138		113
Total inventory, net	$	1,977	$	2,020

As of March 31, 2019 and December 31, 2018, total inventory is recorded net of $0.8 million of inventory reserves.

Accrued Expenses

Accrued expenses consisted of the following (in thousands):

	March 31, 2019		December 31, 2018
Accrued clinical study costs	$	3,371	$	2,430
Accrued interest expense	2,676		2,260
Accrued manufacturing costs	1,775		1,823
Accrued other	1,750		1,972
Total accrued expenses	$	9,572	$	8,485

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Company-wide Realignment (Notes)

3 Months Ended

Mar. 31, 2019

Restructuring and Related Activities [Abstract]

Company-wide Realignment

Company-wide Realignment

On October 18, 2018, the Company effected a Company-wide realignment to increase its efficiency and focus on achieving its corporate goals. For the year ended December 31, 2018, total expense for these activities was $4.0 million, with $1.6 million included in research and development expense and $2.4 million included in selling, general and administrative expense. Total expense was comprised of $7.7 million for severance costs, offset by a $3.7 million reversal of non-cash, stock-based compensation expense related to forfeited, unvested equity awards. As of March 31, 2019, all severance costs had been paid. No expense for these activities was recorded for the three months ended March 31, 2019.

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Leases Leases

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Leases

Leases

On December 29, 2016, the Company entered into an agreement with BMR-Axiom LP to lease office and laboratory space as its corporate headquarters located at 4550 Towne Centre Court, San Diego, California (Lease) for a period of 10 years commencing on October 30, 2017. The Company has an option to extend the Lease for an additional 5 years at the end of the initial term.

The Company provided a standby letter of credit for $0.9 million in lieu of a security deposit. This amount will decrease to $0.6 million after year two of the lease term and decrease to $0.3 million after year 5 of the lease term. As of March 31, 2019, $0.9 million was pledged as collateral for such letter of credit and recorded as restricted cash. The annual rent under the Lease is subject to escalation during the term. In addition to rent, the Lease requires the Company to pay certain taxes, insurance and operating costs relating to the leased premises. The Lease contains customary default provisions, representations, warranties and covenants. The Lease is classified as an operating lease.

Future minimum lease payments under the Lease as of March 31, 2019, are as follows (in thousands):

2019	$	2,963
2020	4,058
2021	4,174
2022	4,294
2023	4,417
Thereafter	18,134
Total future minimum lease payments	38,040
Less: discount	(6,881		)
Total lease liability	$	31,159

The Company recorded a lease liability and ROU lease asset for the Lease based on the present value of lease payments over the expected lease term, discounted using the Company’s incremental borrowing rate. The option to extend the Lease was not recognized as a part of the Company’s lease liability or ROU lease asset. The Company recorded $0.7 million of lease expense for each of the three months ended March 31, 2019 and 2018. Amortization for the right-of-use lease asset was $0.3 million for the three months ended March 31, 2019.

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Deferred Royalty Obligation

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Deferred Royalty Obligation

Deferred Royalty Obligation

On May 10, 2018, the Company closed a $125.0 million royalty financing agreement (the Royalty Agreement) with HealthCare Royalty Partners (HCR). Under the terms of the Royalty Agreement, the Company received $125.0 million in exchange for tiered royalty payments on worldwide net product sales of GIAPREZA. HCR is entitled to receive quarterly royalties on worldwide net product sales of GIAPREZA beginning April 1, 2018. Quarterly payments to HCR under the Royalty Agreement start at a maximum royalty rate, with step-downs based on the achievement of annual net product sales thresholds. Through December 31, 2021, the royalty rate will be a maximum of 10%. Starting January 1, 2022, the maximum royalty rate may increase by 4% if an agreed-upon, cumulative sales threshold has not been met, and, starting January 1, 2024, the maximum royalty rate may increase by an additional 4% if a different agreed-upon, cumulative sales threshold has not been met. The Royalty Agreement is subject to maximum aggregate royalty payments to HCR of 180% of the $125.0 million received by the Company, at which time the payment obligations under the Royalty Agreement would expire. The Royalty Agreement was entered into by the Company’s wholly-owned subsidiary, La Jolla Pharma, LLC, and HCR has no recourse under the Royalty Agreement against La Jolla Pharmaceutical Company or any assets other than GIAPREZA.

On receipt of the $125.0 million payment from HCR, the Company recorded a deferred royalty obligation of $125.0 million, net of issuance costs of $0.7 million. For the three months ended March 31, 2019, the Company recognized interest expense, including amortization of the obligation discount, of $2.7 million. The carrying value of the deferred royalty obligation as of March 31, 2019 was $124.3 million, net of unamortized obligation discount of $0.7 million, and was classified as noncurrent. The related accrued interest liability was $9.1 million and $6.8 million as of March 31, 2019 and December 31, 2018, respectively, of which $6.4 million and $4.5 million was classified as noncurrent as of March 31, 2019 and December 31, 2018, respectively. During the three months ended March 31, 2019, the Company made royalty payments to HCR of $0.4 million, and, as of March 31, 2019, the Company recorded royalty obligations payable of $0.4 million in accrued expenses.

In the event of certain material breaches of the Royalty Agreement, HCR would have the right to terminate the Royalty Agreement and demand payment of an amount equal to either $125.0 million, minus aggregate royalties paid to HCR, or $225.0 million, minus aggregate royalties paid to HCR, depending on the type of breach. The Company concluded that certain of these contract provisions that could result in an acceleration of amounts due under the Royalty Agreement are embedded derivatives that require bifurcation from the deferred royalty obligation and fair value recognition. The Company determined the fair value of each derivative by assessing the probability of each event occurring, as well as the potential repayment amounts and timing of such repayments that would result under various scenarios. As a result of this assessment, the Company determined that the fair value of the embedded derivatives is immaterial as of March 31, 2019. Each reporting period, the Company estimates the fair value of the embedded derivatives until the features lapse and/or the termination of the Royalty Agreement. Any change in the fair value of the embedded derivatives will be recorded as either a gain or loss on the consolidated statements of operations.

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Stockholders' Equity Stockholders' Equity

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Stockholders' Equity

Shareholders’ Equity

2018 Common Stock Offering

In March 2018, the Company offered and sold 3,910,000 shares of common stock in an underwritten public offering at a price of $29.50 per share for gross proceeds of approximately $115.3 million. The Company received proceeds of approximately $109.8 million, net of approximately $5.5 million in underwriting commissions, discounts and other issuance costs.

Preferred Stock

In January 2019, the Company issued 782,031 shares of common stock upon the conversion of 2,737 shares of Series F Convertible Preferred Stock. As of March 31, 2019, there were no shares of Series F Convertible Preferred Stock issued and outstanding.

Warrants

In March 2018, the Company issued 43,056 shares of common stock in a cashless exercise of 83,013 warrants to a third-party warrant holder. As of March 31, 2019, the Company had outstanding warrants to purchase 10,000 shares of common stock.

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Equity Incentive Plans

3 Months Ended

Mar. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Equity Incentive Plans

Equity Incentive Plans

2013 Equity Incentive Plan

A total of 8,100,000 shares of common stock have been reserved for future issuance under the La Jolla Pharmaceutical Company 2013 Equity Incentive Plan. As of March 31, 2019, 356,873 shares of common stock remained available for future grants under the 2013 Equity Plan.

2018 Employee Stock Purchase Plan

A total of 750,000 shares of common stock have been reserved for issuance under the La Jolla Pharmaceutical Company 2018 Employee Stock Purchase Plan (ESPP). As of March 31, 2019, 665,960 shares of common stock remained available for future grants under the ESPP.

Equity Awards

The activity related to equity awards, which are comprised of stock options and an inducement grant (described below), is summarized as follows:

	Shares Underlying Stock Options		Weighted- average Exercise Price per Share
Outstanding at December 31, 2018	6,466,214		$	23.26
Granted(1)	1,764,041		$	6.06
Forfeited	(700,464	)	$	22.08
Outstanding at March 31, 2019	7,529,791		$	19.34

(1) In March 2019, the Company issued a stock option grant to the Company’s recently appointed Chief Commercial Officer to purchase 80,000 shares of common stock at an exercise price equal to the fair market value of the Company’s common stock on the grant date. The grant was awarded as an inducement grant outside of the 2013 Equity Plan. On the first anniversary of the grant date, 25% of the underlying shares become exercisable with the remaining shares vesting on a monthly basis over the subsequent three years subject to continued service during that time.

Share-based Compensation Expense

Total share-based compensation expense related to all share-based awards was comprised of the following (in thousands):

	Three Months Ended   March 31,
	2019		2018
Research and development	$	3,899	$	5,396
Selling, general and administrative	2,812		4,006
Total share-based compensation expense	$	6,711	$	9,402

As of March 31, 2019, $60.5 million of total unrecognized share-based compensation expense related to unvested stock options remains and is expected to be recognized over a weighted-average period of 2.7 years.

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Basis of Presentation and Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation and Use of Estimates

The accompanying unaudited condensed consolidated financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of U.S. Securities and Exchange Commission (SEC) Regulation S-X. Accordingly, they should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2018 included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018, filed with the SEC on March 4, 2019 (the Form 10-K).

Principles of Consolidation

The accompanying unaudited condensed consolidated financial statements include the accounts of La Jolla Pharmaceutical Company and its wholly-owned subsidiaries. All significant inter-company transactions and balances have been eliminated in consolidation. The unaudited condensed consolidated financial statements contain all normal recurring accruals and adjustments that, in the opinion of management, are necessary to present fairly the condensed consolidated balance sheet as of March 31, 2019, the condensed consolidated statements of operations for the three months ended March 31, 2019, the condensed consolidated statement of shareholder’s equity for the three months ended March 31, 2019 and the condensed consolidated statement of cash flows for the three months ended March 31, 2019.

Use of Estimates

The preparation of the Company’s unaudited condensed consolidated financial statements requires management to make estimates and assumptions that impact the reported amounts of assets, liabilities, revenue and expenses and the disclosure of contingent assets and liabilities in the Company’s unaudited condensed consolidated financial statements and the accompanying notes. Actual results may differ materially from these estimates. Certain amounts previously reported in the financial statements have been reclassified to conform to the current year presentation. Such reclassifications did not affect net loss, shareholders’ equity or cash flows. The results of operations for the three months ended March 31, 2019 are not necessarily indicative of the results to be expected for the full year or any future interim periods. The accompanying condensed consolidated balance sheet as of December 31, 2018 has been derived from the audited consolidated balance sheet as of December 31, 2018 contained in the Form 10-K.

Leases

Leases

At lease commencement, the Company records a lease liability based on the present value of lease payments over the expected lease term. The Company calculates the present value of lease payments using the discount rate implicit in the lease, unless that rate cannot be readily determined. In that case, the Company uses its incremental borrowing rate, which is the rate of interest that the Company would have to pay to borrow on a collateralized basis an amount equal to the lease payments over the expected lease term. The Company records a corresponding right-of-use lease asset based on the lease liability, adjusted for any lease incentives received and any initial direct costs paid to the lessor prior to the lease commencement date.

After lease commencement, the Company measures its leases as follows: (i) the lease liability based on the present value of the remaining lease payments using the discount rate determined at lease commencement; and (ii) the right-of-use lease asset based on the remeasured lease liability, adjusted for any unamortized lease incentives received, any unamortized initial direct costs and the cumulative difference between rent expense and amounts paid under the lease agreement. Any lease incentives received and any initial direct costs are amortized on a straight-line basis over the expected lease term. Rent expense is recorded on a straight-line basis over the expected lease term.

Concentration of Credit Risk

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash. The Company maintains its cash in checking and money market savings accounts at federally insured financial institutions in excess of federally insured limits.

Net Loss per Share

Net Loss per Share

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the period, without consideration of potential common shares. Diluted net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding plus potential common shares. Convertible preferred stock, stock options and warrants are considered potential common shares and are included in the calculation of diluted net loss per share using the treasury stock method when their effect is dilutive. Potential common shares are excluded from the calculation of diluted net loss per share when their effect is anti-dilutive.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In June 2018, the Financial Accounting Standards Board (FASB) issued ASU 2018-07, Stock Compensation (Topic 718): Improvements to Nonemployee Share-based Payment Accounting (ASU 2018-07). The standard expands the scope of Accounting Standards Codification (ASC) Topic 718 to include share-based payment awards granted to nonemployees in exchange for goods and services. ASU 2018-07 is effective for annual and interim reporting periods beginning after December 15, 2018.

In the first quarter 2019, the Company adopted ASU 2018-07. Prior to the adoption of ASU 2018-07, share-based payments awards granted to nonemployees were measured at fair value on their grant date, subject to periodic remeasurement, and share-based compensation expense was recognized on a straight-line basis over their vesting terms. After the adoption of ASU 2018-07, the fair value of share-based payment awards granted to nonemployees is not required to be remeasured periodically and share-based compensation expense will continue to be recorded on a straight-line basis over their vesting period, consistent with share-based payment awards granted to employees. As a result of the adoption of ASU 2018-07, the Company remeasured all of its outstanding nonemployee share-based payment awards at fair value and recognized a cumulative-effect adjustment of $0.2 million to accumulated deficit as of January 1, 2019.

In February 2016, FASB issued ASU No. 2016-02. This guidance requires lessees to recognize operating leases with a term greater than one year on the balance sheet as a right-of-use asset and corresponding lease liability. ASU 2016-02 is effective for annual and interim reporting periods beginning after December 15, 2018. Although ASU 2016-02 is required to be adopted at the earliest period presented using a modified retrospective approach, the FASB issued ASU No. 2018-11, Leases (Topic 842): Targeted Improvements (“ASU 2018-11”), which allows for an alternative transition method of adoption by recognizing a cumulative-effect adjustment, if any, to the opening balance of retained earnings in the period of adoption.

The Company adopted ASU 2016-02 on January 1, 2019 utilizing the alternative transition method allowed for under ASU 2018-11. As a result, the Company recorded lease liabilities and right-of-use lease assets of $31.8 million and $16.8 million, respectively, on its balance sheet as of January 1, 2019. The lease liabilities represent the present value of the remaining lease payments of the Company’s corporate headquarters lease (see Note 5), discounted using the Company’s incremental borrowing rate as of January 1, 2019. The corresponding right-of-use lease assets are recorded based on the lease liabilities, adjusted for the unamortized lease incentives received and the cumulative difference between rent expense and amounts paid under the its corporate headquarters lease. The adoption of ASU 2016-02 did not have a material impact on either the statement of operations or statement of cash flows for the three months ended March 31, 2019.

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Basis of Presentation and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedules of Concentration of Risk

The following table includes the percentage of net product sales and accounts receivable balances for the Company’s three major customers, each of which comprised 10% or more of its net product sales:

	Net Product Sales		Accounts Receivable
	Three Months Ended March 31, 2019		As of March 31, 2019
Customer A	34	%	29	%
Customer B	32	%	33	%
Customer C	30	%	29	%
Total	96	%	91	%

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Balance Sheet Account Details (Tables)

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Inventory

Inventory, net consisted of the following (in thousands):

	March 31, 2019		December 31, 2018
Work-in-process	$	1,839	$	1,907
Finished goods	138		113
Total inventory, net	$	1,977	$	2,020

Accrued Expenses

Accrued expenses consisted of the following (in thousands):

	March 31, 2019		December 31, 2018
Accrued clinical study costs	$	3,371	$	2,430
Accrued interest expense	2,676		2,260
Accrued manufacturing costs	1,775		1,823
Accrued other	1,750		1,972
Total accrued expenses	$	9,572	$	8,485

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Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Lessee, Operating Lease, Liability, Maturity

Future minimum lease payments under the Lease as of March 31, 2019, are as follows (in thousands):

2019	$	2,963
2020	4,058
2021	4,174
2022	4,294
2023	4,417
Thereafter	18,134
Total future minimum lease payments	38,040
Less: discount	(6,881		)
Total lease liability	$	31,159

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Equity Incentive Plans Equity Incentive Plan (Tables)

3 Months Ended

Mar. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Equity award activity

The activity related to equity awards, which are comprised of stock options and an inducement grant (described below), is summarized as follows:

	Shares Underlying Stock Options		Weighted- average Exercise Price per Share
Outstanding at December 31, 2018	6,466,214		$	23.26
Granted(1)	1,764,041		$	6.06
Forfeited	(700,464	)	$	22.08
Outstanding at March 31, 2019	7,529,791		$	19.34

(1) In March 2019, the Company issued a stock option grant to the Company’s recently appointed Chief Commercial Officer to purchase 80,000 shares of common stock at an exercise price equal to the fair market value of the Company’s common stock on the grant date. The grant was awarded as an inducement grant outside of the 2013 Equity Plan. On the first anniversary of the grant date, 25% of the underlying shares become exercisable with the remaining shares vesting on a monthly basis over the subsequent three years subject to continued service during that time.

Share-based compensation expense

Total share-based compensation expense related to all share-based awards was comprised of the following (in thousands):

	Three Months Ended   March 31,
	2019		2018
Research and development	$	3,899	$	5,396
Selling, general and administrative	2,812		4,006
Total share-based compensation expense	$	6,711	$	9,402

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Business (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 140,017	$ 172,604	$ 154,408

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Basis of Presentation and Summary of Significant Accounting Policies (Schedule of Concentration Risk) (Details)		3 Months Ended
	Mar. 31, 2019	Mar. 31, 2019
Net Product Sales
Concentration Risk [Line Items]
Concentration of credit risk		96.00%
Accounts Receivable
Concentration Risk [Line Items]
Concentration of credit risk	91.00%
Customer A | Net Product Sales
Concentration Risk [Line Items]
Concentration of credit risk		34.00%
Customer A | Accounts Receivable
Concentration Risk [Line Items]
Concentration of credit risk	29.00%
Customer B | Net Product Sales
Concentration Risk [Line Items]
Concentration of credit risk		32.00%
Customer B | Accounts Receivable
Concentration Risk [Line Items]
Concentration of credit risk	33.00%
Customer C | Net Product Sales
Concentration Risk [Line Items]
Concentration of credit risk		30.00%
Customer C | Accounts Receivable
Concentration Risk [Line Items]
Concentration of credit risk	29.00%

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Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Potentially dilutive common shares related to the outstanding preferred stock, stock options, restricted stock units and warrants (in shares)	14.3	14.1
Cumulative effect adjustment to accumulated deficit	$ (160)	$ 0
Total lease liability	31,159
Right-of-use lease asset	$ 16,482
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total lease liability			$ 31,800
Right-of-use lease asset			16,800
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment to accumulated deficit			160
Retained Earnings | Accounting Standards Update 2018-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment to accumulated deficit			$ 200

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Balance Sheet Account Details (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Restricted Cash and Cash Equivalents Items [Line Items]
Inventory reserves	$ 0.8	$ 0.8
4550 Towne Centre Court, San Diego, California | Financial Standby Letter of Credit | Letter of Credit
Restricted Cash and Cash Equivalents Items [Line Items]
Cash collateral as security	$ 0.9

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Balance Sheet Account Details (Schedule of Inventory) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Work-in-process	$ 1,839	$ 1,907
Finished goods	138	113
Total inventory, net	$ 1,977	$ 2,020

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Balance Sheet Account Details (Summary of Accrued Expenses) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued clinical study costs	$ 3,371	$ 2,430
Accrued manufacturing costs	1,775	1,823
Accrued other	1,750	1,972
Total accrued expenses	$ 9,572	$ 8,485

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Restructuring (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ 4,000,000
Reversal of non-cash-stock-based compensation expense		3,700,000
Research and development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		1,600,000
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		2,400,000
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 7,700,000

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Leases (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Oct. 30, 2022	Oct. 30, 2019	Dec. 29, 2016
Lessee, Lease, Description [Line Items]
Term of lease contract					10 years
Renewal term of lease contract					5 years
Lease expense	$ 0.7	$ 0.7
Right of use asset amortization	0.3
Standby Letters of Credit
Lessee, Lease, Description [Line Items]
Security deposit					$ 0.9
Forecast | Standby Letters of Credit
Lessee, Lease, Description [Line Items]
Security deposit			$ 0.3	$ 0.6
4550 Towne Centre Court, San Diego, California | Financial Standby Letter of Credit | Letter of Credit
Lessee, Lease, Description [Line Items]
Cash collateral as security	$ 0.9

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Leases (Lease liability maturity) (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
2019	$ 2,963
2020	4,058
2021	4,174
2022	4,294
2023	4,417
Thereafter	18,134
Total future minimum lease payments	38,040
Less: discount	(6,881)
Total lease liability	$ 31,159

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Deferred Royalty Obligation (Details) - USD ($)		3 Months Ended
	May 10, 2018	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Deferred royalty obligation, net		$ 124,336,000	$ 124,323,000
Royalty Obligation Payable		400,000
HealthCare Royalty Partners
Debt Instrument [Line Items]
Proceeds from royalty agreement	$ 125,000,000
Maximum potential royalty payout	180.00%
Required payment for breach of agreement, payment one	$ 125,000,000.0
Required payment for breach of agreement, payment two	225,000,000.0
HealthCare Royalty Partners | Loans Payable | Royalty Financing Agreement
Debt Instrument [Line Items]
Deferred royalty obligation, net	125,000,000	124,300,000
Debt issuance costs	$ 700,000
Interest expense		2,700,000
Unamortized debt discount		700,000
Accrued interest expense		9,100,000	6,800,000
Royalty payments		400,000
HealthCare Royalty Partners | Period One
Debt Instrument [Line Items]
Maximum potential royalty payout	10.00%
HealthCare Royalty Partners | Period Two
Debt Instrument [Line Items]
Increase in maximum potential payout percent	4.00%
HealthCare Royalty Partners | Payout Period
Debt Instrument [Line Items]
Increase in maximum potential payout percent	4.00%
Other Noncurrent Liabilities | HealthCare Royalty Partners | Loans Payable | Royalty Financing Agreement
Debt Instrument [Line Items]
Accrued interest expense		$ 6,400,000	$ 4,500,000

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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jan. 31, 2019	Dec. 31, 2018
Common Stock [Member]
Class of Stock [Line Items]
Shares issued upon conversion (in share)				782,031
Series F Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)		0		2,737	2,737
Underwriting Agreement [Member]
Class of Stock [Line Items]
Number of shares of common stock issued (in shares)	3,910,000
Price per share (usd per share)	$ 29.50		$ 29.50
Proceeds from sale of stock	$ 115.3
Proceeds, net of underwriting commissions	109.8
Sale of stock issuance costs	$ 5.5
Common Stock [Member]
Class of Stock [Line Items]
Stock issued during period (in shares)	43,056	782,000	3,910,000
Warrants exercised during period (in shares)	83,013
Warrants outstanding (in shares)		10,000

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Equity Incentive Plans (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Jul. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized share-based compensation expense	$ 60.5
Recognized weighted average period	2 years 7 months 50 days
2013 Equity Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			8,100,000
Shares available for grant (in shares)	356,873
2018 Employee Stock Purchase Plan [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)	665,960	750,000

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Equity Incentive Plans (Stock Option Activity) (Details) - $ / shares	1 Months Ended	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2019
Shares Underlying Stock Options
Outstanding beginning balance, Shares underlying stock options and restricted stock awards (in shares)		6,466,214
Granted, Shares underlying stock options and restricted stock awards (in shares)		1,764,041
Forfeited, Shares underlying stock options and restricted stock awards (in shares)		(700,464)
Outstanding ending balance, Shares underlying stock options and restricted stock awards (in shares)	7,529,791	7,529,791
Weighted- Average Exercise Price per Share
Outstanding beginning balance, Weighted - average exercise price (usd per share)		$ 23.26
Granted, Weighted - average exercise price (usd per share)		6.06
Forfeited, Weighted - average exercise price (usd per share)		22.08
Outstanding ending balance, Weighted - average exercise price (usd per share)	$ 19.34	$ 19.34
Chief Commercial Officer [Member]
Shares Underlying Stock Options
Granted, Shares underlying stock options and restricted stock awards (in shares)	80,000
Employee Stock Option [Member] | Chief Commercial Officer [Member]
Weighted- Average Exercise Price per Share
Options vesting percentage	25.00%
Award vesting period	3 years

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Equity Incentive Plans (Share-based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 6,711	$ 9,402
Research and development [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	3,899	5,396
Selling, General and Administrative Expenses [Member]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 2,812	$ 4,006

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Label	Element	Value
Restricted Cash	us-gaap_RestrictedCash	$ 909,000
Restricted Cash	us-gaap_RestrictedCash	909,000
Additional Paid-in Capital [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (160,000)