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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2019	Nov. 04, 2019
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Registrant Name	EyePoint Pharmaceuticals, Inc.
Entity Central Index Key	0001314102
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	EYPT
Entity Common Stock, Shares Outstanding		108,117,440
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	false
Entity File Number	000-51122
Entity Tax Identification Number	26-2774444
Entity Address, Address Line One	480 Pleasant Street
Entity Address, City or Town	Watertown
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02472
City Area Code	(617)
Local Phone Number	926-5000
Document Quarterly Report	true
Document Transition Report	false
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common Stock, par value $0.001
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 31,760	$ 45,261
Accounts and other receivables, net	8,855	627
Prepaid expenses and other current assets	3,887	1,434
Inventory	2,559	279
Total current assets	47,061	47,601
Property and equipment, net	386	288
Operating lease right-of-use assets	3,186	0
Intangible assets, net	28,284	30,129
Restricted cash	150	150
Total assets	79,067	78,168
Current liabilities:
Accounts payable	5,461	2,640
Accrued expenses	4,446	3,789
Accrued development milestone		15,000
Deferred revenue		30
Operating lease liabilities - current portion	461	0
Total current liabilities	10,368	21,459
Long-term debt	46,733	17,621
Operating lease liabilities - noncurrent	3,028	0
Other long-term liabilities	3,000	1,455
Total liabilities	63,129	40,535
Contingencies (Note 13)
Stockholders' equity:
Preferred stock, $.001 par value, 5,000,000 shares authorized, no shares issued and outstanding		0
Common stock, $.001 par value, 150,000,000 shares authorized at September 30, 2019 and December 31, 2018; 108,029,244 and 95,372,236 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	108	95
Additional paid-in capital	469,866	445,192
Accumulated deficit	(454,876)	(408,493)
Accumulated other comprehensive income	840	839
Total stockholders' equity	15,938	37,633
Total liabilities and stockholders' equity	$ 79,067	$ 78,168

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	108,029,244	95,372,236
Common stock, shares outstanding	108,029,244	95,372,236

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Total revenues	$ 2,509	$ 486	$ 11,732	$ 2,129
Operating expenses:
Cost of sales, excluding amortization of acquired intangible assets	327	0	1,363	0
Research and development	3,484	6,233	11,237	14,323
Sales and marketing	7,778	3,646	22,373	5,158
General and administrative	4,365	4,161	13,790	10,662
Amortization of acquired intangible assets	615	0	1,845	0
Total operating expenses	16,569	14,040	50,608	30,143
Loss from operations	(14,060)	(13,554)	(38,876)	(28,014)
Other income (expense):
Interest and other income, net	183	129	692	181
Interest expense	(1,770)	(815)	(4,389)	(1,535)
Loss on extinguishment of debt		0	(3,810)	0
Change in fair value of derivative liability		(18,886)		(45,164)
Total other expense, net	(1,587)	(19,572)	(7,507)	(46,518)
Net loss	$ (15,647)	$ (33,126)	$ (46,383)	$ (74,532)
Net loss per share - basic and diluted	$ (0.15)	$ (0.44)	$ (0.45)	$ (1.27)
Weighted average shares outstanding - basic and diluted	106,938	75,170	102,900	58,840
Net loss	$ (15,647)	$ (33,126)	$ (46,383)	$ (74,532)
Foreign currency translation adjustments			1	2
Comprehensive loss	(15,647)	(33,126)	(46,382)	(74,530)
Product [Member]
Revenues:
Total revenues	1,009	0	8,941	0
License and Collaboration Agreement [Member]
Revenues:
Total revenues	1,054	56	1,125	798
Royalty Income [Member]
Revenues:
Total revenues	$ 446	$ 430	$ 1,666	$ 1,331

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]
Balance at Dec. 31, 2017	$ 9,905	$ 45	$ 331,609	$ (322,585)	$ 836
Balance, shares at Dec. 31, 2017		45,256,999
Cumulative effect adjustment for adoption of new accounting principle	218			218
Net loss	(74,532)			(74,532)
Other comprehensive income	2				2
Issuance of stock, net of issue costs	40,938	$ 29	40,909
Issuance of stock, net of issue costs, shares		28,790,548
Fair value of warrants issued	355		355
Exercise of stock options	503		503
Exercise of stock options, shares		310,900
Vesting of stock units	(27)		(27)
Vesting of stock units, shares		153,601
Exercise of warrants	28,863	$ 21	28,842
Exercise of warrants , shares		20,184,224
Settlement of derivative liability	38,666		38,666
Stock-based compensation	2,814		2,814
Balance at Sep. 30, 2018	47,705	$ 95	443,671	(396,899)	838
Balance, shares at Sep. 30, 2018		94,696,272
Balance at Jun. 30, 2018	11,687	$ 74	374,766	(363,991)	838
Balance, shares at Jun. 30, 2018		74,512,048
Cumulative effect adjustment for adoption of new accounting principle	218			218
Net loss	(33,126)			(33,126)
Exercise of warrants	28,863	$ 21	28,842
Exercise of warrants , shares		20,184,224
Settlement of derivative liability	38,666		38,666
Stock-based compensation	1,397		1,397
Balance at Sep. 30, 2018	47,705	$ 95	443,671	(396,899)	838
Balance, shares at Sep. 30, 2018		94,696,272
Balance at Dec. 31, 2018	$ 37,633	$ 95	445,192	(408,493)	839
Balance, shares at Dec. 31, 2018	95,372,236	95,372,236
Net loss	$ (46,383)			(46,383)
Other comprehensive income	1				1
Issuance of stock, net of issue costs	20,755	$ 12	20,743
Issuance of stock, net of issue costs, shares		12,234,495
Exercise of stock options	308	$ 1	307
Exercise of stock options, shares		166,760
Vesting of stock units	(87)		(87)
Vesting of stock units, shares		255,753
Stock-based compensation	3,711		3,711
Balance at Sep. 30, 2019	$ 15,938	$ 108	469,866	(454,876)	840
Balance, shares at Sep. 30, 2019	108,029,244	108,029,244
Balance at Jun. 30, 2019	$ 28,210	$ 106	466,493	(439,229)	840
Balance, shares at Jun. 30, 2019		106,297,792
Net loss	(15,647)			(15,647)
Issuance of stock, net of issue costs	2,412	$ 2	2,410
Issuance of stock, net of issue costs, shares		1,707,995
Vesting of stock units	(14)		(14)
Vesting of stock units, shares		23,457
Stock-based compensation	977		977
Balance at Sep. 30, 2019	$ 15,938	$ 108	$ 469,866	$ (454,876)	$ 840
Balance, shares at Sep. 30, 2019	108,029,244	108,029,244

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net loss	$ (46,383)	$ (74,532)
Adjustments to reconcile net loss to cash flows used in operating activities:
Amortization of intangible assets	1,845	1,230
Depreciation of property and equipment	109	127
Amortization of debt discount	430	363
Non-cash interest expense	728
Loss on extinguishment of debt	3,810	0
Stock-based compensation	3,711	2,814
Change in fair value of derivative liability		45,164
Changes in operating assets and liabilities:
Accounts receivable and other current assets	(10,681)	(770)
Inventory	(2,280)
Accounts payable and accrued expenses	3,481	3,415
Right-of-use assets and operating lease liabilities	47	0
Deferred revenue	(30)	(505)
Deferred rent		27
Net cash used in operating activities	(45,213)	(22,667)
Cash flows from investing activities:
Acquisition of Icon Bioscience Inc., net of cash acquired	0	(16,780)
Purchases of property and equipment	(207)	(153)
Net cash used in investing activities	(207)	(16,933)
Cash flows from financing activities:
Proceeds from issuance of stock, net of issuance costs	20,755	34,471
Proceeds from exercise of warrants		28,863
Proceeds from issuance of long-term debt	50,000	20,000
Payment of debt issue costs	(1,341)	(1,347)
Payment of long-term debt principal	(20,000)
Payment of extinguishment of debt costs	(2,716)
Net settlement of stock units to satisfy statutory tax withholding	(87)
Proceeds from exercise of stock options	308	503
Payment of contingent development milestone	(15,000)
Net cash provided by financing activities	31,919	82,490
Effect of foreign exchange rate changes on cash and cash equivalents	0	(2)
Net (decrease) increase in cash, cash equivalents and restricted cash	(13,501)	42,888
Cash, cash equivalents and restricted cash at beginning of period	45,411	13,026
Cash, cash equivalents and restricted cash at end of period	31,910	55,914
Supplemental cash flow information:
Cash interest paid	3,574	841
Supplemental disclosure of non-cash investing and financing activities:
Accrued development milestone		15,000
Accrued term loan exit fee	$ 3,000	1,200
Fair value of second tranche purchase liability		4,734
Fair value of warrants issued with debt		355
Fair value of second tranche warrants		$ 18,165

Operations and Basis of Presentation

9 Months Ended

Sep. 30, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Operations and Basis of Presentation

1.	Operations and Basis of Presentation

Overview

The accompanying condensed consolidated financial statements of EyePoint Pharmaceuticals, Inc. and subsidiaries (collectively, the “Company”) as of September 30, 2019 and for the three and nine months ended September 30, 2019 and 2018 are unaudited. Certain information in the footnote disclosures of these financial statements has been condensed or omitted in accordance with the rules and regulations of the Securities and Exchange Commission (the “SEC”). These financial statements should be read in conjunction with the Company’s audited consolidated financial statements and footnotes included in the Company’s Transition Report on Form 10-K for the six months ended December 31, 2018. In the opinion of management, these statements have been prepared on the same basis as the audited consolidated financial statements as of and for the six months ended December 31, 2018, and include all adjustments, consisting only of normal recurring adjustments, that are necessary for the fair presentation of the Company’s financial position, results of operations, comprehensive loss and cash flows for the periods indicated. The preparation of financial statements in accordance with United States (“U.S.”) generally accepted accounting principles (“GAAP”) requires management to make assumptions and estimates that affect, among other things, (i) reported amounts of assets and liabilities; (ii) disclosure of contingent assets and liabilities at the date of the consolidated financial statements; and (iii) reported amounts of revenues and expenses during the reporting period. The results of operations for the three and nine months ended September 30, 2019 are not necessarily indicative of the results that may be expected for the entire fiscal year or any future period.

The Company is a specialty biopharmaceutical company committed to developing and commercializing innovative ophthalmic products for the treatment of eye diseases. The Company has two products, YUTIQ^® and DEXYCU^®, which were approved by the U.S. Food and Drug Administration (“FDA”) in October 2018 and February 2018, respectively.

YUTIQ (fluocinolone acetonide intravitreal implant) 0.18 mg for intravitreal injection, was launched directly in the U.S. in February 2019. YUTIQ is indicated for the treatment of chronic non-infectious uveitis affecting the posterior segment of the eye, which affects between 55,000 to 120,000 people in the U.S. each year and causes approximately 30,000 new cases of blindness every year, making it the third leading cause of blindness. Injected into the eye in an office visit, YUTIQ is a micro-insert that delivers a micro-dose of a corticosteroid to the back of the eye on a sustained constant (zero order release) basis for up to 36 months. YUTIQ is based on the Company’s proprietary Durasert™ sustained-release drug delivery technology platform, which can deliver drugs for predetermined periods of time ranging from months to years.

DEXYCU (dexamethasone intraocular suspension) 9%, for intraocular administration, was launched directly in the U.S. in March 2019. Indicated for the treatment of post-operative ocular inflammation, DEXYCU is administered as a single dose at the end of ocular surgery and is the first long-acting intraocular product approved by the FDA for this indication. DEXYCU utilizes the Company’s proprietary Verisome^® drug-delivery platform, which allows for a single intraocular injection that releases dexamethasone, a corticosteroid, over time. There were approximately 4.8 million cataract surgeries performed during 2018 in the U.S., with growth projected at an estimated annual rate of 8%, and the Company launched DEXYCU with a primary focus on its use following cataract surgery. The Company acquired DEXYCU in connection with its acquisition of Icon Bioscience, Inc. (“Icon”) in March 2018.

ILUVIEN^® for diabetic macular edema (“DME”), the Company’s lead licensed product, is sold directly in the U.S. and several European Union (“EU”) countries by Alimera Sciences, Inc. (“Alimera”). In July 2017, the Company expanded its license agreement with Alimera to include the uveitis indication utilizing the Durasert technology in Europe, the Middle East and Africa (“EMEA”), which received European regulatory approval in March 2019 and, subject to obtaining pricing and reimbursement in each applicable country, will be marketed as ILUVIEN. Retisert^®, one of the Company’s earlier generation products, was approved in 2005 by the FDA for the treatment of chronic non-infectious uveitis affecting the posterior segment of the eye and is sold in the U.S. by Bausch & Lomb Inc. (“Bausch & Lomb”). The Company’s development programs are focused primarily on developing sustained release products that utilize its Durasert and Verisome technology platforms to deliver approved drugs to treat chronic diseases. The Company’s strategy includes developing products independently while continuing to leverage its technology platforms through collaborations and license agreements.

Liquidity

The Company has a history of operating losses and has not had significant recurring cash inflows from revenue. The Company’s operations have been financed primarily from sales of its equity securities, issuance of debt and a combination of royalty income and other fees received from collaboration partners. During the three months ended September 30, 2019, the Company received gross cash proceeds of approximately $2.6 million from utilization of its at-the-market (“ATM”) equity program (see Note 10). The Company had cash and cash equivalents of $31.8 million at September 30, 2019. Accordingly, the foregoing conditions, taken together, continue to raise substantial doubt about the Company’s ability to continue as a going concern for one year from the issuance of these financial statements.

In the first quarter of 2019, the Company commenced the U.S. launch of its first two commercial products, YUTIQ and DEXYCU. During the ensuing months, the commercial progress of YUTIQ and DEXYCU has been positive, with demand for YUTIQ meeting the Company’s expectations. However, the Company, has no history of direct commercialization of its products and management does not yet have sufficient historical evidence to assert that it is probable that the Company will receive sufficient revenues from its sales of YUTIQ and DEXYCU to fund operations. As of September 30, 2019, the Company has had recurring operating losses since its inception and has an accumulated deficit of approximately $454.9 million and working capital of $36.7 million. The Company expects that its existing cash and cash equivalents at September 30, 2019, and cash inflows from anticipated YUTIQ and DEXYCU product sales will be sufficient to fund the Company’s operating plan into 2020.

The Company anticipates that it will need to raise additional capital to fund its operations until its cash flows reach a level sufficient to fund the Company’s operating plan through 2020. Actual cash requirements could differ from management’s projections due to many factors, including the success of commercialization for YUTIQ and DEXYCU, the actual costs of these commercialization efforts, additional investments in research and development programs, competing technological and market developments and the costs of any strategic acquisitions and/or development of complementary business opportunities.

Recently Adopted and Recently Issued Accounting Pronouncements

New accounting pronouncements are issued periodically by the Financial Accounting Standards Board (“FASB”) and are adopted by the Company as of the specified effective dates. Unless otherwise disclosed below, the Company believes that recently issued and adopted accounting pronouncements will not have a material impact on the Company’s financial position, results of operations and cash flows or do not apply to the Company’s operations.

In February 2016, the FASB issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842) (“ASU 2016-02”). In July 2018, the FASB issued ASU No. 2018-11, Leases (Topic 842), Targeted Improvements, which contains certain amendments to ASU 2016-02 intended to provide relief in implementing the new standard. The new standard establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all operating leases, with an exception provided for leases with a duration of one year or less. The Company adopted ASU 2016-02 on January 1, 2019 using the modified retrospective transition approach which, pursuant to ASU 2018-11, allows companies to recognize existing leases at the adoption date without requiring comparable period presentation. Comparative periods are presented in accordance with the previous guidance in Accounting Standards Codification (“ASC”) 840, Leases.

In adopting the new standard, the Company elected to utilize the available package of practical expedients permitted under the transition guidance within the new standard, which does not require the reassessment of the following: (i) whether existing or expired arrangements are or contain a lease, (ii) the lease classification of existing or expired leases, and (iii) whether previous initial direct costs would qualify for capitalization under the new lease standard. Additionally, the Company elected to combine lease and non-lease components and to exclude leases with a term of 12 months or less. The adoption of this accounting standard resulted in recording operating lease ROU assets for three real estate operating lease arrangements and corresponding operating lease liabilities of $3.5 million and $3.7 million, respectively, as of January 1, 2019. The operating lease assets at adoption were lower than the operating lease liabilities because the balance of the Company’s deferred rent liabilities at December 31, 2018, which represented lease incentives, was reclassified into operating lease assets. The adoption of the standard did not have a material effect on the Company’s consolidated statements of operations or consolidated statements of cash flows.

Under Topic 842, the Company determines whether the arrangement is or contains a lease at inception. Operating leases are recognized on the consolidated balance sheets as ROU assets, current portion of lease liabilities and long-term lease liabilities. ROU assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Operating lease liabilities and their corresponding ROU assets are recorded based on the present value of lease payments over the expected remaining lease term. For this purpose, the Company considers only payments that are fixed and determinable at the time of commencement. The operating lease ROU assets also include any lease payments made and adjustments for prepayments and lease incentives. The interest rate implicit in lease contracts is typically not readily determinable. As a result, the Company utilized its incremental borrowing rate, which is the rate incurred to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment. Lease terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, to replace the current incurred loss impairment methodology for financial assets measured at amortized cost with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information, including forecasted information, to develop credit loss estimates. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted for fiscal years beginning after December 15, 2018. This standard will be effective for the Company in the first quarter of its fiscal year ending December 31, 2020. The Company is currently evaluating the impact the adoption of this update will have on its consolidated financial statements.

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

2.	Summary of Significant Accounting Policies

The Company’s significant accounting policies are described in Note 2 to our audited financial statements included in the Company’s Transition Report on Form 10-K for the six-month transition period ended December 31, 2018. There have been no subsequent changes to the Company’s significant accounting policies except for the policies discussed below related to revenue and cost of goods sold for commercial product sales and for the adoption of the new accounting standard for lessee operating leases (see Note 1).

Revenue Recognition

Revenue is recognized when a customer obtains control of promised goods or services, in an amount that reflects the consideration which the entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, Revenue from Contracts with Customers (“ASC 606”), the Company performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised within each contract, determines those that are performance obligations and assesses whether each promised good or service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied. Sales, value add, and other taxes collected on behalf of third parties are excluded from revenue.

Product sales, net — The Company began selling YUTIQ and DEXYCU in February and March 2019, respectively. The Company is currently selling YUTIQ and DEXYCU in the U.S. through a single third-party logistics provider (the “3PL”), which takes title to the goods. The 3PL distributes the products through a limited number of specialty distributors and specialty pharmacies (collectively the “Distributors”), with whom the Company has entered into formal agreements, for delivery to physician practices for YUTIQ and to hospital outpatient departments and ambulatory surgical centers for DEXYCU. The Company recognizes revenue on sales of products when the 3PL obtains control of the products, which occurs at a point in time, typically upon delivery. The Company expects to enter into arrangements with healthcare providers and payors that provide for government mandated and/or privately negotiated rebates, chargebacks, and discounts with respect to the purchase of the Company’s products.

Reserves for variable consideration — Product sales are recorded at the wholesale acquisition costs, net of applicable reserves for variable consideration. Components of variable consideration include trade discounts and allowances, provider chargebacks and discounts, payor rebates, product returns, and other allowances that are offered within contracts between the Company and its Distributors, payors, and other contracted purchasers relating to the Company’s product sales. These reserves, as detailed below, are based on the amounts earned, or to be claimed on the related sales, and are classified either as reductions of accounts receivable or a current liability, depending on how the amount is to be settled. Overall, these reserves reflect the Company’s best estimates of the amount of consideration to which it is entitled based on the terms of the respective underlying contracts. Actual amounts of consideration ultimately received may differ from our estimates. If actual results in the future vary from our estimates, the Company adjusts these estimates, which would affect product revenue and earnings in the period such variances become known.

Distribution fees — The Company compensates its Distributors for services explicitly stated in the Company’s contracts and are recorded as a reduction of revenue in the period the related product sale is recognized.

Provider chargebacks and discounts — Chargebacks are discounts that represent the estimated obligations resulting from contractual commitments to sell products at prices lower than the list prices charged to our Distributors. These Distributors charge us for the difference between what they pay for the product and our contracted selling price. These reserves are established in the same period that the related revenue is recognized, resulting in a reduction of product revenue and the establishment of a current liability. Reserves for chargebacks consist of amounts that the Company expects to pay for units that remain in the distribution channel inventories at each reporting period-end that the Company expects will be sold under a contracted selling price, and chargebacks that Distributors have claimed, but for which the Company has not yet settled.

Government rebates — The Company is subject to discount obligations under state Medicaid programs and Medicare. These reserves are recorded in the same period the related revenue is recognized, resulting in a reduction of product revenue and the establishment of a current liability which is included in accrued expenses and other current liabilities on the condensed consolidated balance sheets. The Company’s liability for these rebates consists of invoices received for claims from prior quarters that have not been paid or for which an invoice has not yet been received, estimates of claims for the current quarter, and estimated future claims that will be made for product that has been recognized as revenue, but which remains in the distribution channel inventories at the end of each reporting period.

Payor rebates — The Company expects to contract with certain private payor organizations, primarily insurance companies, for the payment of rebates with respect to utilization of its products. The Company estimates these rebates and records such estimates in the same period the related revenue is recognized, resulting in a reduction of product revenue and the establishment of a current liability.

Co-Payment assistance — The Company offers co-payment assistance to commercially insured patients meeting certain eligibility requirements. The calculation of the accrual for co-pay assistance is based on an estimate of claims and the cost per claim that the Company expects to receive associated with product that has been recognized as revenue.

Product returns — The Company generally offers a limited right of return based on its returned goods policy, which includes damaged product and remaining shelf life. The Company estimates the amount of its product sales that may be returned and records this estimate as a reduction of revenue in the period the related product revenue is recognized, as well as reductions to trade receivables, net on the condensed consolidated balance sheets.

Cost of sales, excluding amortization of acquired intangible assets — Cost of sales, excluding amortization of acquired intangible assets, consist of costs associated with the manufacture of YUTIQ and DEXYCU, certain period costs, product shipping and, as applicable, royalty expense. The inventory costs for YUTIQ include purchases of various components, the active pharmaceutical ingredient (“API”) and internal labor and overhead for the product manufactured in the Company’s Watertown, MA facility. The inventory costs for DEXYCU include purchased components, the API and third-party manufacturing and assembly. Capitalization of inventory costs begins after FDA approval of the product. Prior thereto, inventory costs of products and product candidates are recorded as research and development expense, even if this inventory may later be sold as commercial product.

Acquisition of Icon Bioscience, Inc.

9 Months Ended

Sep. 30, 2019

Business Combinations [Abstract]

Acquisition of Icon Bioscience, Inc.

3.	Acquisition of Icon Bioscience, Inc.

On March 28, 2018, the Company and its newly-created wholly-owned subsidiary, Oculus Merger Sub, Inc., acquired Icon, a specialty biopharmaceutical company, through a reverse triangular merger (the “Icon Acquisition”) pursuant to an Agreement and Plan of Merger (the “Merger Agreement”) between the Company, Icon, and Shareholder Representative Services LLC (“SRS”), solely in its capacity as representative of Icon’s securityholders. The Icon Acquisition was accounted for as an asset acquisition because substantially all of the fair value of the gross assets acquired were deemed to be concentrated in a group of similar identifiable assets related to Icon’s lead product, DEXYCU. A portion of the Icon Acquisition was funded by a debt financing and an equity financing, both of which closed concurrently with the Icon Acquisition (see Notes 9 and 10).

Pursuant to the Merger Agreement, the Company made a closing payment of $15.0 million to SRS, net of an estimated $127,000 working capital adjustment, and is obligated to pay certain post-closing contingent cash payments upon the achievement of specified milestones and based upon certain net sales and partnering revenue standards, in each case subject to the terms and conditions set forth in the Merger Agreement. These include but are not limited to (i) a one-time development milestone of $15.0 million payable in cash upon the first commercial sale of DEXYCU in the U.S., (ii) sales milestone payments totaling up to $95.0 million upon the achievement of certain sales thresholds and subject to certain Centers for Medicare & Medicaid Services (“CMS”) reimbursement conditions set forth in the Merger Agreement, (iii) quarterly earn-out payments equal to 12% on net sales of DEXYCU in a given year, which earn-out payments will increase to 16% of net sales of DEXYCU in such year beginning in the calendar quarter for such year to the extent aggregate annual DEXYCU consideration exceeds $200.0 million in such year, (iv) quarterly earn-out payments equal to 20% of partnering revenue received by the Company for DEXYCU outside of the U.S., and (v) single-digit percentage quarterly earn-out payments with respect to net sales and/or partnering income, if any, resulting from future clinical development, regulatory approval and commercialization of any other product candidates the Company acquired in the Icon Acquisition. Following the first commercial sale of DEXYCU, the Company paid the $15.0 million one-time development milestone to SRS in April 2019.

The purchase price on the date of the Icon Acquisition was $32.0 million, and was comprised of the closing consideration of $15.0 million, including the assumption of an estimated $127,000 of net current liabilities of Icon, the contingent development milestone payment of $15.0 million and transaction costs of approximately $2.0 million. Given the stage of development of DEXYCU, the Company determined these payments did not represent research and development costs. The contingent consideration in the form of sales milestones will be capitalized as additional intangible assets when any such consideration becomes probable and can be reasonably estimated. Sales-based royalty payments will be expensed as incurred.

The purchase price was allocated to a single finite-lived intangible asset with an expected amortization life of approximately 13 years. The intangible asset is being amortized on a straight-line basis over that period. The acquisition did not have a net tax impact due to a full valuation allowance against the acquired net deferred tax assets.

For the three and nine months ended September 30, 2019, the Company accrued sales-based royalty expense of $97,000 and $195,000 respectively, as a component of cost of sales.

License and Collaboration Agreements

9 Months Ended

Sep. 30, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

License and Collaboration Agreements

4.	License and Collaboration Agreements

Alimera

Under a collaboration agreement with Alimera, as amended in March 2008 (the “Prior Alimera Agreement”), the Company licensed to Alimera the rights to develop, market and sell certain product candidates, including ILUVIEN for DME, and Alimera assumed all financial responsibility for the development of the licensed products. The Company was entitled to receive a share of any net profits (as defined) on sales of each licensed product (including ILUVIEN) by Alimera, measured on a quarter-by-quarter and country-by-country basis, and Alimera was entitled to recover a share of previously incurred and unapplied net losses (as defined) for commercialization of each product in a country. The Company was also entitled to reimbursement of certain patent maintenance costs with respect to the patents licensed to Alimera.

On July 10, 2017, the Company entered into a further amended and restated collaboration agreement (the “Amended Alimera Agreement”), pursuant to which the Company (i) licensed its then Durasert three-year uveitis product candidate (currently marketed by the Company as YUTIQ in the U.S.) to Alimera for regulatory approval and distribution under its ILUVIEN trade name in EMEA and (ii) converted the net profit share arrangement for each licensed product (including ILUVIEN) under the Prior Alimera Agreement to a sales-based royalty on a calendar quarter basis commencing July 1, 2017, with payments from Alimera due 60 days following the end of each quarter.

Following the completion of the Amended Alimera Agreement, Alimera filed a Type II variation in December 2017 for ILUVIEN for the treatment of non-infectious uveitis affecting the posterior segment of the eye in all seventeen European countries in which it previously received regulatory approval for ILUVIEN for DME. In March 2019, Alimera received regulatory approval for the uveitis indication. After the label for this new indication is finalized consistent with each such country’s local requirements, Alimera has indicated that it plans to commercialize the product for this indication under its ILUVIEN trademark.

Under the Amended Alimera Agreement, sales-based royalties started at the rate of 2%. Commencing December 12, 2018, the royalty rate increased to 6% on aggregate calendar year net sales up to $75 million and to 8% on any calendar year net sales in excess of $75 million. Alimera’s share of contingently recoverable accumulated ILUVIEN commercialization losses under the Prior Alimera Agreement, capped at $25 million, are being reduced as follows: (i) $10.0 million was cancelled in lieu of an upfront license fee on the effective date of the Amended Alimera Agreement; (ii) for the period from December 12, 2018 through calendar year 2020, 50% of earned sales-based royalties in excess of 2% will be offset against quarterly royalty payments otherwise due from Alimera; (iii) in March 2019, another $5.0 million was cancelled upon Alimera’s receipt of regulatory approval for ILUVIEN for the uveitis indication; and (iv) commencing in calendar year 2021, 20% of earned sales-based royalties in excess of 2% will be offset against quarterly royalty payments otherwise due from Alimera until such time as the balance of the original $25 million of recoverable commercialization losses has been fully recouped. At September 30, 2019, the remaining recoverable balance of these commercialization losses was approximately $9.2 million.

Revenue recognized under the Amended Alimera Agreement totaled $475,000 and $249,000 for the three months ended September 30, 2019 and 2018, respectively, and $1.5 million and $682,000 for the nine months ended September 30, 2019 and 2018, respectively. In addition to patent fee reimbursements in both periods, the Company recorded $446,000 and $215,000 of sales-based royalty income for the three months ended September 30, 2019 and 2018, respectively, and $1.4 million and $594,000 for the nine months ended September 30, 2019 and 2018, respectively.

Bausch & Lomb

Pursuant to a licensing and development agreement, as amended, Bausch & Lomb has a worldwide exclusive license to make and sell Retisert in return for royalties based on sales. Royalty income was $0 and $215,000 for the three months ended September 30, 2019 and 2018, respectively, and $204,000 and $737,000 for the nine months ended September 30, 2019 and 2018, respectively. Accounts receivable from Bausch & Lomb was $0 at September 30, 2019 and $253,000 at December 31, 2018.

OncoSil Medical

The Company entered into an exclusive, worldwide royalty-bearing license agreement in December 2012, amended and restated in March 2013, with OncoSil Medical UK Limited (f/k/a Enigma Therapeutics Limited), a wholly-owned subsidiary of OncoSil Medical Ltd (“OncoSil”) for the development of BrachySil, the Company’s previous product candidate for the treatment of pancreatic and other types of cancer. The Company received an upfront fee of $100,000 and is entitled to 8% sales-based royalties, 20% of sublicense consideration and milestone payments based on aggregate product sales. OncoSil is obligated to pay an annual license maintenance fee of $100,000 by the end of each calendar year, the most recent of which was received in December 2018. For each calendar year commencing with 2014, the Company is entitled to receive reimbursement of any patent maintenance costs, sales-based royalties and sub-licensee sales-based royalties earned, but only to the extent such amounts, in the aggregate, exceed the $100,000 annual license maintenance fee. As of September 30, 2019, OncoSil has not received regulatory approval in any jurisdiction. In March 2019 the Clinical Oversight Committee of the British Standards Institute (“BSI”) advised OncoSil that insufficient clinical benefit had been demonstrated to recommend approval of its longstanding CE Mark application. In October 2019, Oncosil announced that it had completed its follow up meeting with BSI and is focused on submitting an updated Clinical Evaluation Report for CE Mark approval. The Company has no consequential performance obligations under the OncoSil license agreement. No revenue was recognized related to the OncoSil agreement for each of the three and nine months ended September 30, 2019 and 2018. As of September 30, 2019, no deferred revenue was recorded for this agreement.

Ocumension Therapeutics

In November 2018, the Company entered into an exclusive license agreement with Ocumension Therapeutics (“Ocumension”) for the development and commercialization of its three-year micro insert using the Durasert technology for the treatment of chronic non-infectious uveitis affecting the posterior segment of the eye in the greater China territory, which is comprised of China, Hong Kong, Macau and Taiwan. The Company received a one-time upfront payment of $1.75 million from Ocumension and is eligible to receive up to (i) $7.25 million upon the achievement by Ocumension of certain prescribed development and regulatory milestones, and (ii) $3 million commercial sales-based milestones. In addition, the Company is entitled to receive mid-single digit sales-based royalties. In August 2019, the Company received $1.0 million in development milestone payment from Ocumension triggered by the approval of its Investigational New Drug (“IND”) in China for Eyepoint’s three-year intravitreal micro-insert containing 0.18mg of fluocinolone acetonide using the Durasert™ technology (known as YUTIQ in the United States). The IND allows the importation of finished product into China for use in its initiated clinical trial to support regulatory approval for the treatment of chronic uveitis affecting the posterior segment of the eye, which was recognized as license and collaboration agreement revenue during the period.

Ocumension has also received a special approval by the Hainan Province People's Government to market this product for chronic, non-infectious posterior segment uveitis in the Hainan Bo Ao Lecheng International Medical Tourism Pilot Zone (“Hainan Pilot Zone”). In March 2019, the Company entered into a Memorandum of Understanding, pursuant to which, the Company will supply product for the clinical trials and Hainan Pilot Zone use. Paralleling to Ocumension’s normal registration process of the product with the Chinese Regulatory Authorities, the Company is entitled to product supply milestones and development milestones, whichever comes first, totaling up to $7.25 million. In August 2019, the Company began shipping this product to Ocumension.

Other than a fixed number of hours of technical assistance support to be provided at no cost by the Company, Ocumension is responsible for all development, regulatory and commercial costs, including any additional technical assistance requested. Ocumension has a first right of negotiation for an additional exclusive license to the Company’s shorter-duration line extension candidate for this indication.

During the three and nine months ended September 30, 2019, $53,000 was recognized as revenue from product sales, respectively, and $0 and $30,000, attributable to the Company’s technical assistance obligation was recognized as license and collaboration revenue, respectively. At September 30, 2019, no deferred revenue was recorded for this agreement.

Feasibility Study Agreements

The Company from time to time enters into funded agreements to evaluate the potential use of its technology systems for sustained release of third-party drug candidates in the treatment of various diseases. Consideration received is generally recognized as revenue over the term of the feasibility study agreement. Revenue recognition for consideration, if any, related to a license option right is assessed based on the terms of any such future license agreement or is otherwise recognized at the completion of the feasibility study agreement. No revenue under feasibility study agreements was recognized for the three and nine months ended September 30, 2019, and revenues of $15,000 and $700,000 were recognized for the three and nine months ended September 30, 2018, respectively. At September 30, 2019, no deferred revenue was recorded for any such agreements.

Product Revenue Reserves and Allowances

9 Months Ended

Sep. 30, 2019

Disclosure Of Product Revenue Reserves And Allowances [Abstract]

Product Revenue Reserves and Allowances

5.	Product Revenue Reserves and Allowances

The Company’s product revenues have been primarily from sales of YUTIQ and DEXYCU in the U.S., which it began shipping to its 3PL in February 2019 and March 2019, respectively.

Net product revenues by product for the three and nine months ended September 30, 2019 were as follows (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2019		September 30, 2019
YUTIQ	$	55	$	7,303
DEXYCU		954		1,638
Total product sales, net	$	1,009	$	8,941

During the three and nine months ended September 30, 2019, revenues from the Company’s single 3PL accounted for 39.0% and 76.0% of total revenues, respectively. Accounts receivable from the 3PL accounted for 93.0% of total accounts receivable at September 30, 2019. The Company recorded no allowance for doubtful accounts as of September 30, 2019.

The following table summarizes activity in each of the product revenue allowance and reserve categories for the nine months ended September 30, 2019 (in thousands):

	Chargebacks, Discounts			Government and Other
	and Fees			Rebates			Returns			Total
Beginning balance at January 1, 2019	$	—		$	—		$	—		$	—
Provision related to sales in the current year		833			161			367			1,361
Adjustments related to prior period sales		—			—			—			—
Deductions applied and payments made		(178	)		(105	)		(171	)		(454	)
Ending balance at September 30, 2019	$	655		$	56		$	196		$	907

Returns are recorded as a reduction of accounts receivable on the condensed consolidated balance sheets. Chargebacks, discounts and fees and rebates are recorded as a component of accrued expenses on the condensed consolidated balance sheets (See Note 7).

Intangible Assets

9 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets

6.	Intangible Assets

The reconciliation of intangible assets for the nine months ended September 30, 2019 and 2018 was as follows (in thousands):

	September 30,			September 30,
	2019			2018
Patented technologies
Gross carrying cost at beginning of period	$	68,322		$	36,349
Acquisition of Icon Bioscience Inc.		—			31,973
Gross carrying cost at end of period		68,322			68,322
Accumulated amortization at beginning of period		(38,193	)		(36,349	)
Amortization expense		(1,845	)		(1,230	)
Accumulated amortization at end of period		(40,038	)		(37,579	)
Net book value at end of period	$	28,284		$	30,743

The Company amortizes intangible assets with finite lives on a straight-line basis over their respective estimated useful lives. Amortization of intangible assets totaled $615,000 and $1.8 million for the three and nine months ended September 30, 2019, respectively, and $615,000 and $1.2 million for the three and nine months ended September 30, 2018.

In connection with the Icon Acquisition (see Note 3), the initial purchase price was attributed to the DEXYCU product intangible asset. This finite-lived intangible asset is being amortized on a straight-line basis over its expected remaining useful life of 11.5 years at the rate of approximately $2.5 million per year. Amortization expense was reported as a component of cost of sales for the three and nine months ended September 30, 2019 and was included in research and development for the three and nine months ended September 30, 2018 in the condensed consolidated statement of comprehensive loss.

Accrued Expenses

9 Months Ended

Sep. 30, 2019

Payables And Accruals [Abstract]

Accrued Expenses

7.	Accrued Expenses

Accrued expenses consisted of the following at September 30, 2019 and December 31, 2018 (in thousands):

	September 30,		December 31,
	2019		2018
Personnel costs	$	2,224	$	1,998
Clinical trial costs		619		798
Professional fees		643		571
Sales chargebacks, rebates and other revenue reserves		711		—
Other		249		422
	$	4,446	$	3,789

Leases

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Leases

On May 17, 2018, the Company amended the lease for its headquarters in Watertown, Massachusetts. The original five-year lease for approximately 13,650 square feet of combined office and laboratory space was set to expire in April 2019. Under the amendment, the Company leased an additional 6,590 square feet of rentable area of the building, with a commencement date of September 10, 2018. The amendment extended the term of the lease for the combined space through May 31, 2025. The landlord agreed to provide the Company a construction allowance of up to $670,750 to be applied toward the aggregate work completed on the total space. The Company has an option to further extend the term of the lease for one additional five-year period. Per the terms of the lease agreement, the Company does not have a residual value guarantee. The Company previously provided a cash-collateralized $150,000 irrevocable standby letter of credit as security for the Company’s obligations under the lease, which was extended through the period that is four months beyond the expiration date of the amended lease. The Company will also be required to pay its proportionate share of certain operating costs and property taxes applicable to the leased premises in excess of new base year amounts.

In July 2017, the Company leased approximately 3,000 square feet of office space in Basking Ridge, New Jersey under a lease term extending through June 2022, with two five-year renewal options at 95% of the then-prevailing market rates. In addition to base rent, the Company is obligated to pay its proportionate share of building operating expenses and real estate taxes in excess of base year amounts. In June 2018, the Company subleased an additional 1,381 square feet of adjoining space from Caladrius Biosciences, Inc. (“Caladrius”) through May 2022. The Chief Executive Officer of Caladrius is a director of the Company. Per the terms of the lease and sublease agreements, the Company does not have any residual value guarantees.

The Company identified and assessed the following significant assumptions in recognizing its ROU assets and corresponding lease liabilities:

•

As the Company’s leases do not provide an implicit rate, the Company estimated the incremental borrowing rate in calculating the present value of the lease payments. The Company utilized the borrowing rate under its existing 5-year term loan facility (see Note 9) as the discount rate.

•

Since the Company elected to account for each lease component and its associated non-lease components as a single combined component, all contract consideration was allocated to the combined lease component.

•

The expected lease terms include noncancelable lease periods. Renewal option periods have not been included in the determination of the lease terms as they are not deemed reasonably certain of exercise.

•

Variable lease payments, such as common area maintenance, real estate taxes and property insurance are not included in the determination of the lease’s ROU asset or lease liability.

As of September 30, 2019, the weighted average remaining term of the Company’s operating leases was 5.4 years and the lease liabilities arising from obtaining ROU assets reflect a weighted average discount rate of 12.5%. Maturities of lease liabilities due under these operating lease agreements as of September 30, 2019 are as follows (in thousands):

Remainder of 2019	$	215
2020		867
2021		889
2022		849
2023		815
Thereafter		1,176
Total lease payments		4,811
Less imputed interest		(1,322	)
Total operating lease liabilities		3,489
Less: current portion		461
Non-current portion	$	3,028

Operating lease expense recognized during the three and nine months ended September 30, 2019 related to ROU assets were $213,000 and $640,000, respectively, excluding $9,000 and $27,000 of variable lease costs, respectively, and were included in general and administrative expense in the Company’s statement of comprehensive loss. Cash paid for amounts included in the measurement of operating lease liabilities were $210,000 and $593,000, respectively, for the three and nine months ended September 30, 2019.

As previously disclosed in the Company’s Transition Report on Form 10-K for the six months ended December 31, 2018, and, under the previous lease accounting standard, ASC 840, Leases, the Company’s total future minimum lease payments under non-cancellable operating leases at December 31, 2018 were as follows (in thousands):

2019	$	826
2020		879
2021		895
2022		849
2023 and beyond		1,990
	$	5,439

Term Loan Agreements

9 Months Ended

Sep. 30, 2019

Debt Disclosure [Abstract]

Term Loan Agreements

9.	Term Loan Agreements

CRG Term Loan Agreement

On February 13, 2019 (the “CRG Closing Date”), the Company entered into the CRG Loan Agreement among the Company, as borrower, CRG Servicing LLC, as administrative agent and collateral agent (the “Agent”), and the lenders party thereto from time to time (the “Lenders”), providing for a senior secured term loan of up to $60 million (the “CRG Loan”). On the CRG Closing Date, $35 million of the CRG Loan was advanced (the “CRG Initial Advance”). The Company utilized the proceeds from the CRG Initial Advance for the repayment in full of all outstanding obligations under its prior credit agreement (the “SWK Credit Agreement”) with SWK Funding LLC (“SWK”). In April 2019, the Company exercised its option to borrow an additional $15 million of the CRG Loan (the “CRG Second Advance”). The Company may draw up to an additional $10 million, subject to achievement of prescribed three-month trailing product revenues of YUTIQ and DEXYCU on or before March 31, 2020.

The CRG Loan is due and payable on December 31, 2023 (the “Maturity Date”). The CRG Loan bears interest at a fixed rate of 12.5% per annum payable in arrears on the last business day of each calendar quarter. The Company is required to make quarterly, interest only payments until the Maturity Date. So long as no default has occurred and is continuing, the Company may elect on each applicable interest payment date to pay 2.5% of the 12.5% per annum interest as Paid In-Kind (“PIK”), whereby such PIK amount would be added to the aggregate principal amount and accrue interest at 12.5% per annum. Through September 30, 2019, total PIK amounts of $728,000 have been added to the principal balance of the CRG Loan. In addition, the Company is required to pay an upfront fee of 1.5% of amounts borrowed under the CRG Loan (excluding any paid-in-kind amounts), which is payable as amounts are advanced under the CRG Loan. The Company will also be required to pay an exit fee equal to 6% of (i) the aggregate principal amounts advanced and (ii) PIK amounts issued, under the CRG Loan Agreement. In connection with the CRG Initial Advance, a 1.5% financing fee of $525,000 and an expense reimbursement of $350,000 were deducted from the net borrowing proceeds. In connection with the CRG Second Advance, a 1.5% financing fee of $225,000 was deducted from the net borrowing proceeds.

Upon the occurrence of a bankruptcy-related event of default, all amounts outstanding with respect to the CRG Loan become due and payable immediately, and upon the occurrence of any other Event of Default (as defined in the CRG Loan Agreement), all or any amounts outstanding with respect to the CRG Loan may become due and payable upon request of the Agent or majority Lenders. Subject to certain exceptions, the Company is required to make mandatory prepayments of the CRG Loan with the proceeds of assets sales and in the event of a change of control of the Company. In addition, the Company may make a voluntary prepayment of the CRG Loan, in whole or in part, at any time. All mandatory and voluntary prepayments of the CRG Loan are subject to the payment of prepayment premiums as follows: (i) if prepayment occurs on or prior to December 31, 2019, an amount equal to 10% of the aggregate outstanding principal amount of the CRG Loan being prepaid, (ii) if prepayment occurs after December 31, 2019 and on or prior to December 31, 2020, 5% of the aggregate outstanding principal amount of the CRG Loan being prepaid and (iii) if prepayment occurs after December 31, 2020 and on or prior to December 31, 2021, an amount equal to 3% of the aggregate outstanding principal amount of the Loan being prepaid. No prepayment premium is due on any principal prepaid after December 31, 2021. Certain of the Company’s existing and future subsidiaries are guaranteeing the obligations of the Company under the CRG Loan Agreement. The obligations of the Company under the CRG Loan Agreement and the guarantee of such obligations are secured by a pledge of substantially all of the Company’s and the guarantors’ assets.

The CRG Loan Agreement contains affirmative and negative covenants customary for financings of this type, including limitations on our and our subsidiaries’ abilities, among other things, to incur additional debt, grant or permit additional liens, make investments and acquisitions, merge or consolidate with others, dispose of assets, pay dividends and distributions and enter into affiliate transactions, in each case, subject to certain exceptions. In addition, the CRG Loan Agreement contains the following financial covenants requiring the Company and the Guarantors to maintain:

•

liquidity in an amount which shall exceed the greater of (i) $5 million and (ii) to the extent the Company has incurred certain permitted debt, the minimum cash balance, if any, required of the Company by the creditors of such permitted debt; and

•

annual minimum product revenue from YUTIQ and DEXYCU: (i) for the twelve-month period beginning on January 1, 2019 and ending on December 31, 2019, of at least $15 million, (ii) for the twelve-month period beginning on January 1, 2020 and ending on December 31, 2020, of at least $45 million, (iii) for the twelve-month period beginning on January 1, 2021 and ending on December 31, 2021, of at least $80 million and (iv) for the twelve-month period beginning on January 1, 2022 and ending on December 31, 2022, of at least $90 million.

The total debt discount related to the CRG Initial Advance was approximately $3.2 million and consisted of (i) the accrual of a $2.1 million exit fee; (ii) the $525,000 upfront fee; and (iii) $591,000 of legal and other transaction costs. This amount is being amortized as additional interest expense over the term of the Loan using the effective interest rate method.

The total debt discount related to the CRG Second Advance was approximately $1.1 million and consisted of (i) the accrual of a $900,000 exit fee; and (ii) the $225,000 upfront fee. This amount is being amortized as additional interest expense over the term of the Loan using the effective interest rate method.

Amortization of debt discount under the CRG Loan totaled $160,000 and $346,000 for the three and nine months ended September 30, 2019, respectively.

SWK Credit Agreement

On March 28, 2018 (the “SWK Closing Date”), the Company entered into the SWK Credit Agreement among the Company, as borrower, SWK, as agent, and the lenders party thereto from time to time, providing for a senior secured term loan of up to $20 million (the “SWK Loan”). On the SWK Closing Date, $15 million of the SWK Loan was advanced (the “SWK Initial Advance”). The remaining $5 million of the SWK Loan was advanced on June 26, 2018 (the “SWK Additional Advance”).

In connection with the SWK Loan, the Company issued a warrant (the “SWK Warrant”) to the Agent to purchase (a) 409,091 shares of Common Stock (the “Initial Advance Warrant Shares”) at an exercise price of $1.10 per share and (b) 77,721 shares of Common Stock (the “Additional Advance Warrant Shares”) at an exercise price of $1.93 per share (see Note 10). The SWK Warrant is exercisable (i) with respect to the Initial Advance Warrant Shares, any time on or after the SWK Closing Date until the close of business on the 7-year anniversary of the SWK Initial Advance and (ii) with respect to the Additional Advance Warrant Shares, any time on or after the closing of the SWK Additional Advance until the close of business on the 7-year anniversary of the SWK Additional Advance. The Agent may exercise the SWK Warrant on a cashless basis at any time. In the event the Agent exercises the SWK Warrant on a cashless basis, the Company will not receive any proceeds.

The Additional Advance Warrant Shares were recorded as a liability at the Closing Date and were remeasured at fair value at each reporting period until the date of the SWK Additional Advance. The aggregate fair value of the Additional Advance Warrant Shares at the Closing Date was $69,000. The Initial Advance Warrant Shares were recorded as equity on the Company’s balance sheet at their relative fair value of $284,000. The remaining $14.6 million of the proceeds received were allocated to the SWK Initial Advance term loan. Upon the closing of the SWK Additional Advance in June 2018, the Additional Advance Warrant Shares were re-valued at $87,000 and reclassified to equity.

The total debt discount related to the SWK Initial Advance was $2.1 million and was comprised of (1) $1.8 million, which included a 1.5% upfront fee, a 6% exit fee (the “Exit Fee”) and legal and other transaction costs, which were ratably allocated to each of the two tranches of the SWK Loan based upon the total principal amount available to the Company under each tranche and (2) $353,000 related to the aggregate fair value of the Initial Advance Warrant Shares and the Additional Advance Warrant Shares. This amount was being amortized as additional interest expense over the term of the SWK Loan using the effective interest rate method.

The total debt issue costs related to the SWK Additional Advance was $299,000 and was comprised of the allocated portions of the 1.5% upfront fee and the Exit Fee. This amount was recorded as a prepaid expense to be amortized ratably from the SWK Closing Date through December 31, 2018. Through the date of the SWK Additional Advance, $97,000 was amortized and the remaining balance of $202,000 was reclassified to debt discount in June 2018. Together with the 6% Exit Fee on the SWK Additional Advance and other transaction costs, total debt discount of $652,000 associated with the SWK Additional Advance was to be amortized over the remaining life of the SWK Additional Advance portion of the SWK Loan using the effective interest rate method.

The SWK Loan was originally scheduled to mature on March 27, 2023 and bore interest at a per annum rate of the three-month LIBOR rate (subject to a 1.5% floor) plus 10.50%. On February 13, 2019, the Company repaid the SWK Loan in connection with the consummation of the CRG Loan Agreement. In addition to repayment of the $20 million principal balance, the Company paid (i) a $1.2 million prepayment penalty, (ii) the $1.2 million Exit Fee, (iii) accrued and unpaid interest of $664,000 through that date and (iv) an additional make-whole interest payment of $306,000 covering the additional period through what would have been the first anniversary of the SWK Loan. In connection with the prepayment of the SWK Loan, the Company recorded a loss on extinguishment of debt of $3.8 million in the three months ended March 31, 2019. In addition to the prepayment penalty and make-whole interest payment amounts, the loss on extinguishment of debt included the write-off of the remaining balance of unamortized debt discount of approximately $2.3 million.

Amortization of debt discount under the SWK Loan totaled $84,000 in the first quarter of 2019 through the SWK loan extinguishment date. The Company recorded $153,000 and $362,000 of amortized deferred debt issue costs and debt discount for the three and nine months ended September 30, 2018, respectively.

Stockholders' Equity

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

Stockholders' Equity

10.	Stockholders’ Equity

2019 Equity Financing

ATM Facility

In January 2019, the Company entered into an at-the-market program (the “ATM Program”). Pursuant to the ATM Program, under a Form S-3 shelf registration statement that was declared effective by the SEC in December 2018, the Company may, at its option, offer and sell shares of its Common Stock from time to time for an aggregate offering price of up to $20.0 million. The Company will pay the sales agent a commission of up to 3.0% of the gross proceeds from any future sales of such shares.

During the three and nine months ended September 30, 2019, the Company sold 1,707,995 shares of its Common Stock at a weighted average price of $1.50 per share for gross proceeds of approximately $2.6 million. Share issue costs, including sales agent commissions, totaled $151,000 during the reporting period.

Share Offering

In April 2019, the Company sold 10,526,500 shares of common stock in an underwritten public offering at a price of $1.90 per share for gross proceeds of $20.0 million. Underwriter discounts and commissions and other share issue costs totaled approximately $1.7 million.

2018 Equity Financing

On the SWK Closing Date, the Company entered into a Securities Purchase Agreement (the “First Tranche Securities Purchase Agreement”) with EW Healthcare Partners, L.P. and EW Healthcare Partners-A, L.P. (collectively, the “First Tranche Investors”), pursuant to which the Company offered and sold to the First Tranche Investors an aggregate of 8,606,324 shares of Common Stock at a purchase price of $1.10 per share (the “First Tranche Purchase Price”) for aggregate gross proceeds of approximately $9.5 million (the “First Tranche Transaction”).

On the SWK Closing Date, the Company entered into a Second Securities Purchase Agreement (the “Second Tranche Securities Purchase Agreement” and together with the First Tranche Securities Purchase Agreement, the “Securities Purchase Agreements”) with the First Tranche Investors and certain other accredited investors (collectively, the “Second Tranche Investors”), pursuant to which the Company, subject to the approval of the Company’s stockholders, would offer and sell to the Second Tranche Investors an aggregate of approximately $25.5 million of Units, with each Unit consisting of (a) one share of Common Stock and (b) one warrant to purchase a share of Common Stock (the “Second Tranche Transaction” and together with the First Tranche Transaction, the “Equity Transactions”).

At a special meeting of stockholders held on June 22, 2018, the Company’s stockholders approved the Second Tranche Transaction, following which, on June 25, 2018, the Company sold to the Second Tranche Investors an aggregate of 20,184,224 Units at a purchase price of $1.265 per Unit for gross proceeds of approximately $25.5 million, not including any proceeds that would be received from an exercise of the warrants (each a “Second Tranche Warrant”, and collectively, the “Second Tranche Warrants”). In addition, the stockholders approved the adoption of an amendment to the Company’s Certificate of Incorporation, as amended, to increase the number of authorized shares of Common Stock from 120,000,000 shares to 150,000,000 shares.

The Company determined that the shares of Common Stock issued in the First Tranche Transaction and the future obligation to issue Units in the Second Tranche Transaction were freestanding instruments. The Common Stock issued in the First Tranche Transaction was recorded as equity on the Company’s balance sheet. The future obligation to issue Units in the Second Tranche Transaction was recorded as a liability on the Company’s balance sheet, subject to remeasurement at fair value at each reporting period until settled.

The Company determined that the First Tranche Transaction and the Second Tranche Transaction should be accounted for as a single transaction. Accordingly, the total consideration received on the SWK Closing Date of $9.5 million was first allocated to the future obligation to issue Units in the Second Tranche Transaction at fair value as of the SWK Closing Date, with the residual amount allocated to the Common Stock issued in the First Tranche Transaction. Further, issuance costs of $343,000 were allocated to each of the freestanding instruments on the basis of relative fair value. A net amount of approximately $4.6 million was allocated to each of the Common Stock issued in the First Tranche Transaction and the future obligation to issue Units in the Second Tranche Transaction, respectively, as of the SWK Closing Date. As of March 31, 2018, the fair value of the Second Tranche Transaction derivative liability was approximately $6.9 million and the Company recorded the $2.2 million change in fair value for the quarter ended March 31, 2018.

The future obligation to issue Units in the second tranche transaction was revalued immediately prior to the Second Tranche Transaction on June 25, 2018 and resulted in a change in fair value of approximately $22.2 million. Upon consummation of the Second Tranche Transaction, the resulting derivative liability balance of approximately $29.1 million was reclassified to equity.

The Company determined that the Second Tranche Warrants were considered puttable warrants that represented an obligation that was indexed to the repurchase of the Company’s shares and could require a transfer of assets that required classification as derivative liabilities. The initial valuation of the Second Tranche Warrants on June 25, 2018 of approximately $18.2 million was revalued at June 30, 2018 and then immediately prior to exercise and resulted in a change in fair value of $1.6 million and $18.9 million, respectively. The change in fair value immediately prior to exercise, in September 2018, was determined as the excess of the closing share price of the Company’s Common Stock on the respective dates on which exercise notices were submitted by each of the Second Tranche Investors over the $1.43 exercise price. Upon exercise of the Second Tranche Warrants, the resulting derivative liability balance of $38.7 million was reclassified to equity.

Warrants to Purchase Common Shares

The following table provides a reconciliation of fixed price warrants to purchase shares of the Company’s Common Stock for the nine months ended September 30, 2019 and 2018:

	Nine Months Ended September 30,
	2019				2018
			Weighted				Weighted
			Average				Average
	Number of		Exercise		Number of		Exercise
	Warrants		Price		Warrants		Price
Balance at beginning of period		486,812	$	1.23		—	$	—
Issued		—		—		486,812		1.23
Balance and exercisable at end of period		486,812	$	1.23		486,812	$	1.23

In connection with the SWK Credit Agreement (see Note 9), the Company issued the SWK Warrant to purchase (i) 409,091 Initial Advance Warrant Shares on March 28, 2018 at an exercise price of $1.10 per share with a seven-year term and (ii) 77,721 Additional Advance Warrant Shares on June 26, 2018 at an exercise price of $1.93 per share with a seven-year term. At September 30, 2019, the weighted average remaining life of the warrants was approximately 5.54 years.

At June 30, 2018, a total of 20,184,224 Second Tranche Warrants were outstanding with a variable exercise price and, accordingly, were excluded from the above table. These warrants were exercised in full in late September 2018 for proceeds of approximately $28.9 million.

Share-Based Payment Awards

9 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Share-Based Payment Awards

11.	Share-Based Payment Awards

Equity Incentive Plan

The 2016 Long-Term Incentive Plan (the “2016 Plan”), approved by the Company’s stockholders on December 12, 2016 (the “Adoption Date”), provides for the issuance of up to 3,000,000 shares of the Company’s Common Stock reserved for issuance under the 2016 Plan plus any additional shares of the Company’s Common Stock that were available for grant under the 2008 Incentive Plan (the “2008 Plan”) at the Adoption Date or would otherwise become available for grant under the 2008 Plan as a result of subsequent termination or forfeiture of awards under the 2008 Plan. At the Company’s Annual Meeting of Stockholders held on June 25, 2019, the Company’s stockholders approved an amendment to the 2016 Plan to increase the number of shares authorized for issuance by 11,000,000 shares. At September 30, 2019, a total of 9,630,240 shares were available for new awards.

Certain inducement awards, although not awarded under the 2016 Plan or the 2008 Plan, are subject to and governed by the terms and conditions of the 2016 Plan or 2008 Plan, as applicable.

Stock Options

The following table provides a reconciliation of stock option activity under the Company’s equity incentive plans and for inducement awards for the nine months ended September 30, 2019:

						Weighted
				Weighted		Average
				Average		Remaining		Aggregate
	Number			Exercise		Contractual		Intrinsic
	of Options			Price		Life		Value
						(in years)		(in thousands)
Outstanding at January 1, 2019		8,139,377		$	2.83
Granted		4,474,096			2.36
Exercised		(166,760	)		1.84
Forfeited		(1,361,109	)		2.49
Expired		(473,346	)		3.77
Outstanding at September 30, 2019		10,612,258		$	2.65		7.69	$	289
Exercisable at September 30, 2019		4,957,932		$	3.07		6.11	$	41

In January 2019, the Company expanded the terms of its annual stock option grants to include vesting ratable monthly over four years, or with 25% vesting after one year followed by ratable monthly vesting over three years. Previously, the Company’s option grants generally had ratable annual vesting over three years, or 1-year cliff vesting. Nonemployee awards are granted similar to the Company’s employee awards. All option grants have a 10-year term. Options to purchase a total of 1,839,397 shares of the Company’s Common Stock vested during the nine months ended September 30, 2019.

In determining the grant date fair value of option awards during the nine months ended September 30, 2019, the Company applied the Black-Scholes option pricing model based on the following key assumptions:

Option life (in years)		5.50 - 6.08
Stock volatility		60% - 64%
Risk-free interest rate		1.29% - 2.63%
Expected dividends		0.0%

The following table summarizes information about employee, non-executive director and external consultant stock options for the nine months ended September 30, 2019 (in thousands, except per share amount):

	Nine Months Ended
	September 30, 2019
Weighted-average grant date fair value per share	$	0.95
Total cash received from exercise of stock options		308
Total intrinsic value of stock options exercised		63

Time-Vested Restricted Stock Units

Time-vested restricted stock unit awards (“RSUs”) issued to date under the 2016 Plan generally vest on a ratable annual basis over 3 years. The related stock-based compensation expense is recorded over the requisite service period, which is the vesting period. The fair value of all time-vested RSUs is based on the closing share price of the Company’s Common Stock on the date of grant.

The following table provides a reconciliation of RSU activity under the 2016 Plan for the nine months ended September 30, 2019:

				Weighted
	Number of			Average
	Restricted			Grant Date
	Stock Units			Fair Value
Nonvested at January 1, 2019		590,213		$	1.86
Granted		587,761			1.90
Vested		(229,294	)		1.81
Forfeited		(136,333	)		2.18
Nonvested at September 30, 2019		812,347		$	1.85

At September 30, 2019, the weighted average remaining vesting term of the RSUs was 1.29 years.

Performance-Based Stock Units

Performance Stock Units (“PSUs”) were previously awarded under the 2016 Plan to certain employees. The performance conditions associated with the PSU awards were as follows: (a) for one third of the PSUs, upon an FDA acceptance of the Company’s NDA submission of YUTIQ for review on or before March 31, 2018 and (b) for two-thirds of the PSUs, upon an FDA approval of YUTIQ on or before March 31, 2019. For each performance criteria achieved, 50% of the PSUs associated with that performance condition vest at the achievement date and 50% vest on the first anniversary of such date, in each case subject to continued employment through such date. As a result of the achievement of the first performance condition on March 19, 2018, 48,332 PSUs vested at that date and the other 48,334 PSUs became subject only to a service-based condition with a vesting date of March 19, 2019. As a result of the achievement of the second performance condition on October 12, 2018, 96,668 PSUs vested at that date and the other 96,666 PSUs became subject only to a service-based condition with a vesting date of October 12, 2019.

In addition, there were 0 and 225,000 outstanding PSUs at September 30, 2019 and December 31, 2018, respectively, which were granted as inducement awards to the Company’s former Chief Financial Officer in connection with his hire at August 1, 2018. The PSUs are subject to proportional vesting based on cumulative measurement over a 3-year period, with two-thirds of the award based upon the achievement of defined amounts of the Company’s product revenues through June 30, 2021 and one-third of the award based upon the net present value of each applicable business development transaction, as defined, through August 1, 2021 measured as of the date that each such transaction is consummated by the Company. The Company’s former Chief Financial Officer resigned from his position on July 8, 2019 and as a result, the award was cancelled and the performance metrics for vesting were not met.

The following table provides a reconciliation of PSU activity for the nine months ended September 30, 2019:

				Weighted
	Number of			Average
	Performance			Grant Date
	Stock Units			Fair Value
Nonvested at January 1, 2019		370,000		$	2.01
Vested		(58,334	)		1.56
Forfeited		(255,000	)		2.26
Nonvested at September 30, 2019		56,666		$	1.34

The weighted-average remaining vesting term of the outstanding PSUs at September 30, 2019 under the 2016 Plan was approximately 0.36 months. On October 12, 2019, 56,666 PSUs vested at that date.

Deferred Stock Units

There were 0 and 35,418 non-vested deferred stock units (“DSUs”) issued and outstanding to the Company’s non-executive directors at each of September 30, 2019 and December 31, 2018, respectively. Each DSU vests one year from the date of grant. Subsequent to vesting, the DSUs will be settled in shares of the Company’s Common Stock upon the earliest to occur of (i) each director’s termination of service on the Company’s Board of Directors and (ii) the occurrence of a change of control as defined in the award agreement. At September 30, 2019, there were 71,251 vested DSUs that have not been settled in shares of the Company’s Common Stock.

				Weighted
	Number of			Average
	Deferred			Grant Date
	Stock Units			Fair Value
Nonvested at January 1, 2019		35,418		$	1.95
Vested		(35,418	)		1.95
Nonvested at September 30, 2019		—		$	—

Market-Based Restricted Stock Units

At September 30, 2019 and December 31, 2018, there were 0 and 500,000 market-based RSUs (“market-based RSUs”) outstanding that were issued on September 15, 2016 as an inducement award to the Company’s President and CEO in connection with her hire. Subject to a service condition through September 15, 2019, the number of shares underlying the market-based RSUs that will vest will be based upon the determination of the relative percentile rank of the 3-year change in the closing price of the Company’s Common Stock compared to that of the companies that make up the Nasdaq Biotechnology Index over that same 3-year period. The weighted average grant date fair value of the market-based RSUs of $1.45 per share was determined using a Monte Carlo valuation model at the date of grant. Stock-based compensation has been recorded from the grant date on a straight-line basis. The performance metrics were not met for vesting through the measurement date.

Employee Stock Purchase Plan

On June 25, 2019, the Company’s stockholders approved the adoption of the EyePoint Pharmaceuticals, Inc. 2019 Employee Stock Purchase Plan (the “ESPP”) and authorized up to 1,100,000 shares of Common Stock reserved for issuance to participating employees. The ESPP allows qualified participants to purchase the Company’s Common Stock twice a year at 85% of the lesser of the average of the high and low sales price of the Company’s Common Stock on (i) the first trading day of the relevant offering period and (ii) the last trading day of the relevant offering period. The number of shares of the Company’s Common Stock each employee may purchase under this plan, when combined with all other employee stock purchase plans, is limited to the lower of an aggregate fair market value of $25,000 during each calendar year, or 50,000 shares of the Company’s Common Stock in any one offering period. The first six month offering period under the ESPP began on August 1, 2019 and will end on January 31, 2020. As of September 30, 2019, no shares of the Company’s Common Stock were issued pursuant to the ESPP.

The Company estimated the fair value of the option component of the ESPP shares at the date of grant using a Black-Scholes valuation model. During the third quarter of 2019, the compensation expense from ESPP shares was immaterial.

Stock-Based Compensation Expense

The Company’s consolidated statements of comprehensive loss included total compensation expense from stock-based payment awards for the three and nine months ended September 30, 2019 and 2018, respectively, as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Compensation expense included in:
Research and development	$	210	$	486	$	874	$	1,145
Sales and marketing		189		263		512		314
General and administrative		578		648		2,325		1,355
	$	977	$	1,397	$	3,711	$	2,814

At September 30, 2019, there was approximately $4.3 million of unrecognized compensation expense related to outstanding equity awards under the 2016 Plan, the 2008 Plan, the inducement awards and the ESPP that is expected to be recognized as expense over a weighted-average period of approximately 1.54 years.

Fair Value Measurements

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements

12.	Fair Value Measurements

The following tables summarize the Company’s assets carried at fair value measured on a recurring basis at September 30, 2019 and December 31, 2018 by valuation hierarchy (in thousands):

	September 30, 2019
			Quoted prices in		Significant other		Significant
	Total Carrying		active markets		observable inputs		unobservable inputs
Description	Value		(Level 1)		(Level 2)		(Level 3)
Assets:
Cash equivalents	$	31,386	$	31,386	$	—	$	—
	$	31,386	$	31,386	$	—	$	—

	December 31, 2018
			Quoted prices in		Significant other		Significant
	Total Carrying		active markets		observable inputs		unobservable inputs
Description	Value		(Level 1)		(Level 2)		(Level 3)
Assets:
Cash equivalents	$	43,194	$	43,194	$	—	$	—
	$	43,194	$	43,194	$	—	$	—

Financial instruments that potentially subject the Company to concentrations of credit risk have historically consisted principally of cash and cash equivalents. At September 30, 2019 and December 31, 2018, substantially all of the Company’s interest-bearing cash equivalent balances were concentrated in one U.S. Government institutional money market fund that has investments consisting primarily of U.S. Government Agency debt, U.S. Treasury Repurchase Agreements and U.S. Government Agency Repurchase Agreements. These deposits may be redeemed upon demand and, therefore, generally have minimal risk. The Company’s cash equivalents are classified within Level 1 on the basis of valuations using quoted market prices.

As described in Note 10, the Second Tranche Transaction was determined to be liability classified, which required that the liability be measured at fair value each period with changes in fair value being recorded as a component of net income (loss) in the statement of operations. The purchase price for each share of Common Stock issuable in the Second Tranche Transaction was defined as the lower of (a) $1.265 (which was a 15% premium to the First Tranche Purchase Price) and (b) a 20% discount to the volume weighted average price (“VWAP”) of the shares of Common Stock on the Nasdaq Stock Market for the 20 trading days immediately prior to the closing of the Second Tranche Transaction; provided, however, that the purchase price could not be lower than $0.88, which was a 20% discount to the First Tranche Purchase Price.

The Second Tranche Warrants were exercisable any time on or after the closing of the Second Tranche Transaction until on or prior to the close of business on the 15th business day following the date on which the holders of the Second Tranche Warrants received written notice from the Company that CMS had announced that a new C-code had been established for DEXYCU. The exercise price of each Second Tranche Warrant was an amount equal to the lower of (a) $1.43 (a 30% premium to the First Tranche Purchase Price) and (b) a 20% discount to the VWAP of the shares of the Company’s Common Stock on Nasdaq for the 20 trading days immediately prior to the exercise of a Second Tranche Warrant; provided, however, that the exercise price could not be lower than $0.88, which was a 20% discount to the First Tranche Purchase Price.

The valuation of the Second Tranche Transaction was determined to be a level 3 valuation because it included unobservable inputs. Changes in the valuation subsequent to the initial valuation were recorded as a component of non-operating expense in the consolidated statement of comprehensive loss. The Second Tranche Transaction liability was valued using a Monte Carlo simulation valuation model. This model incorporated several inputs, including the Common Stock price on the date of valuation, the historical volatility of the price of Common Stock, the risk-free interest rate and management’s assessment of the probability and timing of the issuance of the Units occurring. A significant fluctuation in the Company’s stock price or the Company’s estimate of the number of Units to be issued could result in a material increase or decrease in the fair value of the Second Tranche liability. The Second Tranche Transaction liability was settled upon the closing of the Second Tranche Transaction in June 2018. The Company remeasured the Second Tranche Transaction liability to fair value immediately prior to settlement. This valuation at settlement was calculated as the excess of the sum of (i) the fair value of the Second Tranche Warrants and (ii) the fair value of the shares of Common Stock issued to settle the liability over the cash proceeds received by the Company for the Units. Significant assumptions used to value this liability were as follows:

	March 28, 2018 (Date of Issuance)			June 25, 2018 (Date of Settlement)
Volatility		54.20	%	N/A
Risk free interest rate		1.70	%	N/A
Estimated date of stockholder approval	June 2018			N/A
Estimated number of units issuable		26,900,000			20,184,224
Valuation date stock price	$	1.07		$	1.93

Upon the closing of the Second Tranche Transaction, the Company issued the Second Tranche Warrants, which were determined to be liability classified, which required that the liability be measured at fair value each period with changes in fair value being recorded as a component of non-operating expense in the consolidated statement of comprehensive loss. This valuation was determined to be a level 3 valuation because it included unobservable inputs. The Second Tranche Warrants were valued using a Monte Carlo simulation valuation model. This model incorporated several inputs, including the Common Stock price on the date of valuation, the historical volatility of the price of the Common Stock and the risk-free interest rate. The Second Tranche Investors delivered exercise notices covering all of the Second Tranche Warrants during the period from September 25 - 28, 2018 (see Note 10). The Company revalued the Second Tranche Warrants liability immediately prior to the respective exercise notice dates of the Second Tranche Investors, measured as the excess of the closing share price on the exercise notice date over the actual warrant exercise price of $1.43 per share times the number of shares purchased. The resulting liability balance was then reclassified to equity.

The following table sets forth a summary of changes in the fair value of the Company’s derivative liability for which fair value was determined by Level 3 inputs (in thousands):

	Second Tranche Liability			Additional Advance Warrant Liability			Second Tranche Warrants			Total
Balance at January 1, 2018	$	—		$	—		$	—		$	—
Initial fair value of derivative liability		4,734			69			18,165			22,968
Change in fair value		24,319			18			20,501			44,838
Reclassification to equity		—			(87	)		(38,666	)		(38,753	)
Settlement		(29,053	)		—			—			(29,053	)
Balance at September 30, 2018	$	—		$	—		$	—		$	—

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Contingencies

9 Months Ended

Sep. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Contingencies

13.	Contingencies

Legal Proceedings

The Company is subject to various other routine legal proceedings and claims incidental to its business, which management believes will not have a material effect on the Company’s financial position, results of operations or cash flows.

Net Loss per Share

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Net Loss per Share

14.	Net Loss per Share

Basic net loss per share is computed by dividing the net loss by the weighted average number of common shares outstanding during the period. For periods in which the Company reports net income, diluted net income per share is determined by adding to the basic weighted average number of common shares outstanding the total number of dilutive common equivalent shares using the treasury stock method, unless the effect is anti-dilutive. Potentially dilutive shares were not included in the calculation of diluted net loss per share for each of the three and nine months ended September 30, 2019 and 2018, respectively, as their inclusion would be anti-dilutive.

Potential common stock equivalents excluded from the calculation of diluted earnings per share because the effect would have been anti-dilutive were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Stock options		10,612,258		7,984,469		10,612,258		7,984,469
ESPP		54,895		—		54,895		—
Warrants		486,812		486,812		486,812		486,812
Restricted stock units		812,347		1,395,829		812,347		1,395,829
Performance stock units		56,666		466,668		56,666		466,668
Deferred stock units		—		35,418		—		35,418
		12,022,978		10,369,196		12,022,978		10,369,196

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Revenue Recognition

Product Revenue Reserves and Allowances (Tables)

9 Months Ended

Sep. 30, 2019

Disclosure Of Product Revenue Reserves And Allowances [Abstract]

Disaggregation of Revenue

Net product revenues by product for the three and nine months ended September 30, 2019 were as follows (in thousands):

	Three Months Ended		Nine Months Ended
	September 30, 2019		September 30, 2019
YUTIQ	$	55	$	7,303
DEXYCU		954		1,638
Total product sales, net	$	1,009	$	8,941

Product Revenue Allowances and Reserves

The following table summarizes activity in each of the product revenue allowance and reserve categories for the nine months ended September 30, 2019 (in thousands):

	Chargebacks, Discounts			Government and Other
	and Fees			Rebates			Returns			Total
Beginning balance at January 1, 2019	$	—		$	—		$	—		$	—
Provision related to sales in the current year		833			161			367			1,361
Adjustments related to prior period sales		—			—			—			—
Deductions applied and payments made		(178	)		(105	)		(171	)		(454	)
Ending balance at September 30, 2019	$	655		$	56		$	196		$	907

Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Reconciliation of Intangible Assets

The reconciliation of intangible assets for the nine months ended September 30, 2019 and 2018 was as follows (in thousands):

	September 30,			September 30,
	2019			2018
Patented technologies
Gross carrying cost at beginning of period	$	68,322		$	36,349
Acquisition of Icon Bioscience Inc.		—			31,973
Gross carrying cost at end of period		68,322			68,322
Accumulated amortization at beginning of period		(38,193	)		(36,349	)
Amortization expense		(1,845	)		(1,230	)
Accumulated amortization at end of period		(40,038	)		(37,579	)
Net book value at end of period	$	28,284		$	30,743

Accrued Expenses (Tables)

9 Months Ended

Sep. 30, 2019

Payables And Accruals [Abstract]

Schedule of Accrued Expenses

Accrued expenses consisted of the following at September 30, 2019 and December 31, 2018 (in thousands):

	September 30,		December 31,
	2019		2018
Personnel costs	$	2,224	$	1,998
Clinical trial costs		619		798
Professional fees		643		571
Sales chargebacks, rebates and other revenue reserves		711		—
Other		249		422
	$	4,446	$	3,789

Leases (Tables)

9 Months Ended

Sep. 30, 2019

Leases [Abstract]

Maturities of Lease Liabilities

Remainder of 2019	$	215
2020		867
2021		889
2022		849
2023		815
Thereafter		1,176
Total lease payments		4,811
Less imputed interest		(1,322	)
Total operating lease liabilities		3,489
Less: current portion		461
Non-current portion	$	3,028

Future Minimum Lease Payments Under Non-Cancellable Operating Leases

2019	$	826
2020		879
2021		895
2022		849
2023 and beyond		1,990
	$	5,439

Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2019

Equity [Abstract]

Summary of Reconciliation of Warrants to Purchase Common Stock

The following table provides a reconciliation of fixed price warrants to purchase shares of the Company’s Common Stock for the nine months ended September 30, 2019 and 2018:

	Nine Months Ended September 30,
	2019				2018
			Weighted				Weighted
			Average				Average
	Number of		Exercise		Number of		Exercise
	Warrants		Price		Warrants		Price
Balance at beginning of period		486,812	$	1.23		—	$	—
Issued		—		—		486,812		1.23
Balance and exercisable at end of period		486,812	$	1.23		486,812	$	1.23

Share-Based Payment Awards (Tables)

9 Months Ended

Sep. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock Option Activity Under Plan

The following table provides a reconciliation of stock option activity under the Company’s equity incentive plans and for inducement awards for the nine months ended September 30, 2019:

						Weighted
				Weighted		Average
				Average		Remaining		Aggregate
	Number			Exercise		Contractual		Intrinsic
	of Options			Price		Life		Value
						(in years)		(in thousands)
Outstanding at January 1, 2019		8,139,377		$	2.83
Granted		4,474,096			2.36
Exercised		(166,760	)		1.84
Forfeited		(1,361,109	)		2.49
Expired		(473,346	)		3.77
Outstanding at September 30, 2019		10,612,258		$	2.65		7.69	$	289
Exercisable at September 30, 2019		4,957,932		$	3.07		6.11	$	41

Schedule of Key Assumptions Used

Option life (in years)		5.50 - 6.08
Stock volatility		60% - 64%
Risk-free interest rate		1.29% - 2.63%
Expected dividends		0.0%

Summary of Information about Stock Options

	Nine Months Ended
	September 30, 2019
Weighted-average grant date fair value per share	$	0.95
Total cash received from exercise of stock options		308
Total intrinsic value of stock options exercised		63

Summary of Restricted Stock Unit Activity

The following table provides a reconciliation of RSU activity under the 2016 Plan for the nine months ended September 30, 2019:

				Weighted
	Number of			Average
	Restricted			Grant Date
	Stock Units			Fair Value
Nonvested at January 1, 2019		590,213		$	1.86
Granted		587,761			1.90
Vested		(229,294	)		1.81
Forfeited		(136,333	)		2.18
Nonvested at September 30, 2019		812,347		$	1.85

Summary of Performance Stock Unit Activity

The following table provides a reconciliation of PSU activity for the nine months ended September 30, 2019:

				Weighted
	Number of			Average
	Performance			Grant Date
	Stock Units			Fair Value
Nonvested at January 1, 2019		370,000		$	2.01
Vested		(58,334	)		1.56
Forfeited		(255,000	)		2.26
Nonvested at September 30, 2019		56,666		$	1.34

Summary of Deferred Stock Unit Activity

				Weighted
	Number of			Average
	Deferred			Grant Date
	Stock Units			Fair Value
Nonvested at January 1, 2019		35,418		$	1.95
Vested		(35,418	)		1.95
Nonvested at September 30, 2019		—		$	—

Compensation Expense from Stock-Based Payment Awards

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Compensation expense included in:
Research and development	$	210	$	486	$	874	$	1,145
Sales and marketing		189		263		512		314
General and administrative		578		648		2,325		1,355
	$	977	$	1,397	$	3,711	$	2,814

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets and Liabilities Carried at Fair Value Measured on Recurring Basis

The following tables summarize the Company’s assets carried at fair value measured on a recurring basis at September 30, 2019 and December 31, 2018 by valuation hierarchy (in thousands):

	September 30, 2019
			Quoted prices in		Significant other		Significant
	Total Carrying		active markets		observable inputs		unobservable inputs
Description	Value		(Level 1)		(Level 2)		(Level 3)
Assets:
Cash equivalents	$	31,386	$	31,386	$	—	$	—
	$	31,386	$	31,386	$	—	$	—

	December 31, 2018
			Quoted prices in		Significant other		Significant
	Total Carrying		active markets		observable inputs		unobservable inputs
Description	Value		(Level 1)		(Level 2)		(Level 3)
Assets:
Cash equivalents	$	43,194	$	43,194	$	—	$	—
	$	43,194	$	43,194	$	—	$	—

Summary of Changes in the Fair Value of the Company's Derivative Liability

The following table sets forth a summary of changes in the fair value of the Company’s derivative liability for which fair value was determined by Level 3 inputs (in thousands):

	Second Tranche Liability			Additional Advance Warrant Liability			Second Tranche Warrants			Total
Balance at January 1, 2018	$	—		$	—		$	—		$	—
Initial fair value of derivative liability		4,734			69			18,165			22,968
Change in fair value		24,319			18			20,501			44,838
Reclassification to equity		—			(87	)		(38,666	)		(38,753	)
Settlement		(29,053	)		—			—			(29,053	)
Balance at September 30, 2018	$	—		$	—		$	—		$	—

Second Tranche Transaction Liability [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Schedule of Assumptions Used to Value Liability

Significant assumptions used to value this liability were as follows:

	March 28, 2018 (Date of Issuance)			June 25, 2018 (Date of Settlement)
Volatility		54.20	%	N/A
Risk free interest rate		1.70	%	N/A
Estimated date of stockholder approval	June 2018			N/A
Estimated number of units issuable		26,900,000			20,184,224
Valuation date stock price	$	1.07		$	1.93

Net Loss per Share (Tables)

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Potentially Dilutive Securities Excluded from Computation of Diluted Weighted-Average Shares

Potential common stock equivalents excluded from the calculation of diluted earnings per share because the effect would have been anti-dilutive were as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Stock options		10,612,258		7,984,469		10,612,258		7,984,469
ESPP		54,895		—		54,895		—
Warrants		486,812		486,812		486,812		486,812
Restricted stock units		812,347		1,395,829		812,347		1,395,829
Performance stock units		56,666		466,668		56,666		466,668
Deferred stock units		—		35,418		—		35,418
		12,022,978		10,369,196		12,022,978		10,369,196

Operations and Basis of Presentation - Additional Information (Detail) $ in Thousands, Surgery in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($) Product _People Case	Dec. 31, 2018 USD ($) Surgery	Jan. 01, 2019 USD ($)
Operations [Line Items]
Number of products approved \| Product		2
Cash and cash equivalents	$ 31,760	$ 31,760	$ 45,261
Accumulated deficit	454,876	454,876	408,493
Working capital	36,700	36,700
Operating Lease, Liability	3,489	3,489
Operating Lease, Right-of-Use Asset	3,186	3,186	$ 0
Accounting Standards Update 2018-11 [Member]
Operations [Line Items]
Operating Lease, Liability				$ 3,700
Operating Lease, Right-of-Use Asset				$ 3,500
At-the-Market Offering [Member]
Operations [Line Items]
Gross proceeds from issuance of common stock	$ 2,600	$ 2,600
YUTIQ [Member]
Operations [Line Items]
Number of new cases of blindness every year \| Case		30,000
YUTIQ [Member] \| Minimum [Member]
Operations [Line Items]
Number of people affected by posterior segment of eye in U.S. each year \| _People		55,000
YUTIQ [Member] \| Maximum [Member]
Operations [Line Items]
Number of people affected by posterior segment of eye in U.S. each year \| _People		120,000
DEXYCU [Member]
Operations [Line Items]
Number of cataract surgeries performed in U.S. \| Surgery			4.8
Estimated annual growth rate of cataract surgeries performed in U.S.		8.00%

Acquisition of Icon Bioscience, Inc - Additional Information (Detail) - USD ($)		1 Months Ended	3 Months Ended	9 Months Ended
	Mar. 28, 2018	Apr. 30, 2019	Sep. 30, 2019	Sep. 30, 2019
Business Acquisition [Line Items]
Percentage of partnering income received to be paid quarterly as earn-out consideration	20.00%
Icon Bioscience Inc [Member]
Business Acquisition [Line Items]
Development milestone payment due following the first commercial sales of DEXYCU	$ 15,000,000
Maximum of potential sales milestone payments	$ 95,000,000
Quarterly percentage earn-out consideration due on product net sales	12.00%
Increased percentage earn-out on product net sales if net sales and partnering revenue exceed $200 million in a given year	16.00%
Contingent cash payments, description				These include but are not limited to (i) a one-time development milestone of $15.0 million payable in cash upon the first commercial sale of DEXYCU in the U.S., (ii) sales milestone payments totaling up to $95.0 million upon the achievement of certain sales thresholds and subject to certain Centers for Medicare & Medicaid Services (“CMS”) reimbursement conditions set forth in the Merger Agreement, (iii) quarterly earn-out payments equal to 12% on net sales of DEXYCU in a given year, which earn-out payments will increase to 16% of net sales of DEXYCU in such year beginning in the calendar quarter for such year to the extent aggregate annual DEXYCU consideration exceeds $200.0 million in such year, (iv) quarterly earn-out payments equal to 20% of partnering revenue received by the Company for DEXYCU outside of the U.S., and (v) single-digit percentage quarterly earn-out payments with respect to net sales and/or partnering income, if any, resulting from future clinical development, regulatory approval and commercialization of any other product candidates the Company acquired in the Icon Acquisition
Transaction costs	$ 2,000,000
Icon Bioscience Inc [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Threshold level of annual aggregate consideration above which the 16% royalty on net sales applies in any given year				$ 200,000,000
Icon Bioscience Inc [Member] \| DEXYCU [Member]
Business Acquisition [Line Items]
Development milestone payment due following the first commercial sales of DEXYCU			$ 15,000,000	15,000,000
Estimated working capital adjustment at closing				127,000
Accrued development milestone consideration paid following the first commercial sale of DEXYCU	15,000,000	$ 15,000,000
Purchase price of acquisition	$ 32,000,000
Finite-lived intangible asset expected amortization life	13 years
Accrued sales-based royalty expense			$ 97,000	$ 195,000

License and Collaboration Agreements - Additional Information (Detail)				1 Months Ended			3 Months Ended			6 Months Ended	9 Months Ended
	Jan. 01, 2021	Dec. 12, 2018 USD ($)	Jul. 10, 2017 USD ($)	Aug. 31, 2019 USD ($)	Nov. 30, 2018 USD ($)	Mar. 31, 2013 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2019 USD ($) Country	Sep. 30, 2018 USD ($)
Collaborative Agreements And Contracts [Line Items]
Revenue							$ 2,509,000		$ 486,000		$ 11,732,000	$ 2,129,000
Accounts receivable							8,855,000			$ 627,000	8,855,000
Amended Alimera Agreement [Member]
Collaborative Agreements And Contracts [Line Items]
Royalty percentage earned from sales of product										2.00%
Calendar year net sales threshold for increase in royalty rate		$ 75,000,000
Contingently recoverable accumulated commercialization losses			$ 25,000,000								9,200,000
Partial cancellation of contingently recoverable accumulated commercialization losses in lieu of upfront license fee			$ 10,000,000
Royalty percentage offset for amounts earned above 2% to be applied against balance of accumulated commercialization losses		50.00%
Additional cancellation of contingently recoverable commercialization losses								$ 5,000,000
Accrued sales-based royalty income							446,000		215,000		1,400,000	594,000
Revenue							475,000		249,000		1,500,000	682,000
Amended Alimera Agreement [Member] \| Scenario, Forecast [Member]
Collaborative Agreements And Contracts [Line Items]
Royalty percentage offset for amounts earned above 2% to be applied against balance of accumulated commercialization losses	20.00%
Amended Alimera Agreement [Member] \| Minimum [Member]
Collaborative Agreements And Contracts [Line Items]
Royalty percentage earned from sales of product		6.00%
Amended Alimera Agreement [Member] \| Maximum [Member]
Collaborative Agreements And Contracts [Line Items]
Royalty percentage earned from sales of product		8.00%
Bausch and Lomb [Member]
Collaborative Agreements And Contracts [Line Items]
Accounts receivable							0		253,000		$ 0	253,000
OncoSil Medical UK Limited [Member]
Collaborative Agreements And Contracts [Line Items]
Royalty percentage earned from sales of product											8.00%
Revenue							0		0		$ 0	0
Percentage of non-royalty consideration received from sublicense											20.00%
Deferred revenue							0				$ 0
License agreement commencement date											2012-12
Receipt of upfront license fee						$ 100,000
Ocumension Therapeutics [Member]
Collaborative Agreements And Contracts [Line Items]
Deferred revenue							0				$ 0
Receipt of upfront license fee					$ 1,750,000
Potential future payments based on achievement of development and regulatory milestones											7,250,000
Potential future payments based on achievement of commercial-based milestones											3,000,000
Development milestone payment received				$ 1,000,000
Ocumension Therapeutics [Member] \| Maximum [Member]
Collaborative Agreements And Contracts [Line Items]
Product supply milestones and development milestones											$ 7,250,000
ILUVIEN [Member] \| Europe [Member]
Collaborative Agreements And Contracts [Line Items]
Number of countries in which lead licensed product received regulatory approval \| Country											17
Royalty Income [Member]
Collaborative Agreements And Contracts [Line Items]
Revenue							446,000		430,000		$ 1,666,000	1,331,000
Royalty Income [Member] \| Bausch and Lomb [Member]
Collaborative Agreements And Contracts [Line Items]
Revenue							0		215,000		204,000	737,000
Collaborative Research and Development [Member] \| OncoSil Medical UK Limited [Member]
Collaborative Agreements And Contracts [Line Items]
Revenue										$ 100,000
Collaborative Research and Development [Member] \| Feasibility Study Agreement [Member]
Collaborative Agreements And Contracts [Line Items]
Revenue							0		15,000		0	700,000
Deferred revenue							0				0
Product [Member]
Collaborative Agreements And Contracts [Line Items]
Revenue							1,009,000		0		8,941,000	0
Product [Member] \| Ocumension Therapeutics [Member]
Collaborative Agreements And Contracts [Line Items]
Revenue							53,000				53,000
License and Collaboration Agreement [Member]
Collaborative Agreements And Contracts [Line Items]
Revenue							1,054,000		$ 56,000		1,125,000	$ 798,000
License and Collaboration Agreement [Member] \| Ocumension Therapeutics [Member]
Collaborative Agreements And Contracts [Line Items]
Revenue							$ 0				$ 30,000

Product Revenue Reserves and Allowances - Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues	$ 2,509	$ 486	$ 11,732	$ 2,129
YUTIQ [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues	55		7,303
DEXYCU [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues	954		1,638
Product [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Revenues	$ 1,009	$ 0	$ 8,941	$ 0

Product Revenue Reserves and Allowances - Additional Information (Detail)	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Entity Wide Revenue Major Customer [Line Items]
Allowance for doubtful accounts	$ 0	$ 0
3PL [Member] \| Product Revenue [Member] \| Total Revenues [Member]
Entity Wide Revenue Major Customer [Line Items]
Concentration risk, percentage	39.00%	76.00%
3PL [Member] \| Credit Concentration Risk [Member] \| Total Accounts Receivable [Member]
Entity Wide Revenue Major Customer [Line Items]
Concentration risk, percentage		93.00%

Product Revenue Reserves and Allowances - Product Revenue Allowance and Reserves (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Beginning balance at January 1, 2019	$ 0
Provision related to sales in the current year	1,361
Deductions applied and payments made	(454)
Ending balance at September 30, 2019	907
Chargebacks, Discounts and Fees [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Beginning balance at January 1, 2019	0
Provision related to sales in the current year	833
Deductions applied and payments made	(178)
Ending balance at September 30, 2019	655
Government and Other Rebates [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Beginning balance at January 1, 2019	0
Provision related to sales in the current year	161
Deductions applied and payments made	(105)
Ending balance at September 30, 2019	56
Returns [Member]
Disclosure of Product Revenue Reserves and Allowances [Line Items]
Beginning balance at January 1, 2019	0
Provision related to sales in the current year	367
Deductions applied and payments made	(171)
Ending balance at September 30, 2019	$ 196

Intangible Assets - Reconciliation of Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Gross carrying cost at beginning of period			$ 68,322	$ 36,349
Acquisition of Icon Bioscience Inc.			0	31,973
Gross carrying cost at end of period	$ 68,322	$ 68,322	68,322	68,322
Accumulated amortization at beginning of period			(38,193)	(36,349)
Amortization expense	(615)	(615)	(1,845)	(1,230)
Accumulated amortization at end of period	(40,038)	(37,579)	(40,038)	(37,579)
Net book value at end of period	$ 28,284	$ 30,743	$ 28,284	$ 30,743	$ 30,129

Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 28, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 615	$ 615	$ 1,845	$ 1,230
DEXYCU [Member] \| Icon Bioscience Inc [Member]
Finite-Lived Intangible Assets [Line Items]
Annual amortization expense					$ 2,500
Finite-lived intangible asset, useful life			11 years 6 months

Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Payables And Accruals [Abstract]
Personnel costs	$ 2,224	$ 1,998
Clinical trial costs	619	798
Professional fees	643	571
Sales chargebacks, rebates and other revenue reserves	711
Other	249	422
Accrued expenses	$ 4,446	$ 3,789

Leases - Additional Information (Detail)	1 Months Ended	3 Months Ended	9 Months Ended
Leases - Additional Information (Detail)	Jun. 30, 2018 ft²	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($) ft² Tranche
Disclosure of Leases [Line Items]
Loan facility term			5 years
Operating lease weighted average remaining lease term		5 years 4 months 24 days	5 years 4 months 24 days
Operating lease weighted average discount rate		12.50%	12.50%
Operating lease expense		$ 213,000	$ 640,000
Variable lease cost		9,000	27,000
Operating lease payments		210,000	$ 593,000
Caladrius [Member]
Disclosure of Leases [Line Items]
Additional subleased property office area \| ft²	1,381
Basking Ridge Office Space [Member]
Disclosure of Leases [Line Items]
Number of renewal options \| Tranche			2
Massachusetts [Member] \| Maximum [Member]
Disclosure of Leases [Line Items]
Construction allowance		$ 670,750	$ 670,750
Massachusetts [Member] \| Original Lease [Member]
Disclosure of Leases [Line Items]
Area of leased office and laboratory space \| ft²			13,650
Original lease term		5 years	5 years
Lease term expiration date			Apr. 30, 2019
Massachusetts [Member] \| Second Amendment Lease [Member]
Disclosure of Leases [Line Items]
Lease term expiration date			May 31, 2025
Lease commencement date			Sep. 10, 2018
Additional lease renewal option period		5 years	5 years
Additional Space leased \| ft²			6,590
Irrevocable standby letter of credit		$ 150,000	$ 150,000
NEW JERSEY \| Basking Ridge Office Space [Member]
Disclosure of Leases [Line Items]
Lease term expiration date			Jun. 30, 2022
Lease commencement date			Jul. 31, 2017
Additional lease renewal option period		5 years	5 years
Area of leased office space \| ft²			3,000
Lease renewal rate at 95% of market rent at time of renewal			95.00%

Leases - Maturities of Lease Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Disclosure Of Leases [Abstract]
Remainder of 2019	$ 215
2020	867
2021	889
2022	849
2023	815
Thereafter	1,176
Total lease payments	4,811
Less imputed interest	(1,322)
Total operating lease liabilities	3,489
Less: current portion	461	$ 0
Non-current portion	$ 3,028	$ 0

Leases - Future Minimum Lease Payments Under Non-Cancellable Operating Leases (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Leases [Abstract]
Fiscal Year 2019	$ 826
Fiscal Year 2020	879
Fiscal Year 2021	895
Fiscal Year 2022	849
Fiscal Year 2023 and beyond	1,990
Total future minimum lease payments	$ 5,439

Term Loan Agreements - Additional Information (Detail)				1 Months Ended	3 Months Ended			9 Months Ended
Term Loan Agreements - Additional Information (Detail)	Feb. 13, 2019 USD ($)	Jun. 26, 2018 USD ($) $ / shares shares	Mar. 28, 2018 USD ($) Tranche $ / shares shares	Jun. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) $ / shares	Sep. 30, 2018 USD ($) $ / shares	Apr. 30, 2019 USD ($)
Term Loan Agreement [Line Items]
Exercise price of issued warrants \| $ / shares								$ 0	$ 1.23
Loss on extinguishment of debt							$ 0	$ (3,810,000)	$ 0
Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
Amortization of debt discount (premium)					$ 160,000			$ 346,000
Senior Secured Term Loan [Member] \| Warrants [Member]
Term Loan Agreement [Line Items]
Exercise price of issued warrants \| $ / shares		$ 1.93	$ 1.10
Initial Advance [Member] \| Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
Proceeds from issuance of term loan, net of allocation to the debt warrant			$ 14,600,000
Initial Advance [Member] \| Senior Secured Term Loan [Member] \| Warrants [Member]
Term Loan Agreement [Line Items]
Warrants issued in connection with loan \| shares			409,091
Exercise price of issued warrants \| $ / shares			$ 1.10
Fair value of warrants issued			$ 284,000
Additional Advance [Member] \| Senior Secured Term Loan [Member] \| Warrants [Member]
Term Loan Agreement [Line Items]
Warrants issued in connection with loan \| shares		77,721
Exercise price of issued warrants \| $ / shares		$ 1.93
Warrants, contingent issuance fair value			$ 69,000
Revaluation of additional advance warrants shares reclassified to equity				$ 87,000
Additional Advance [Member] \| SWK Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
Upfront loan origination fee percentage		1.50%
Exit fee percentage payable upon repayment of the total secured term loan		6.00%
Total debt discount		$ 652,000
Loan origination fee, exit fee and other loan transaction costs		299,000
Amortization of deferred debt issue cost through the date of the Additional Advance		97,000
Debt issuance costs remaining balance reclassified to debt discount				$ 202,000
CRG Servicing LLC [Member]
Term Loan Agreement [Line Items]
Restriction of the right to capitalize a portion of quarterly interest in the event of a loan default								So long as no default has occurred and is continuing, the Company may elect on each applicable interest payment date to pay 2.5% of the 12.5% per annum interest as Paid In-Kind (“PIK”), whereby such PIK amount would be added to the aggregate principal amount and accrue interest at 12.5% per annum.
Upfront loan origination fee percentage	1.50%
Minimum liquidity amount	$ 5,000,000
Total debt discount	3,200,000
CRG Servicing LLC [Member] \| Period One [Member]
Term Loan Agreement [Line Items]
Annual minimum product revenue	15,000,000
Annual minimum product revenue period								on January 1, 2019 and ending on December 31, 2019
CRG Servicing LLC [Member] \| Period Two [Member]
Term Loan Agreement [Line Items]
Annual minimum product revenue	45,000,000
Annual minimum product revenue period								January 1, 2020 and ending on December 31, 2020
CRG Servicing LLC [Member] \| Period Three [Member]
Term Loan Agreement [Line Items]
Annual minimum product revenue	80,000,000
Annual minimum product revenue period								January 1, 2021 and ending on December 31, 2021
CRG Servicing LLC [Member] \| Period Four [Member]
Term Loan Agreement [Line Items]
Annual minimum product revenue	$ 90,000,000
Annual minimum product revenue period								January 1, 2022 and ending on December 31, 2022
CRG Servicing LLC [Member] \| Loan Prepayment Prior to December 31, 2019 [Member]
Term Loan Agreement [Line Items]
Principal prepayment premium percentage	10.00%
CRG Servicing LLC [Member] \| Loan Prepayment after December 31, 2019 and Prior to December 31, 2020 [Member]
Term Loan Agreement [Line Items]
Principal prepayment premium percentage	5.00%
CRG Servicing LLC [Member] \| Loan prepayment after December 31, 2020 and prior to December 31, 2021 [Member]
Term Loan Agreement [Line Items]
Principal prepayment premium percentage	3.00%
CRG Servicing LLC [Member] \| Loan prepayment after December 31 2021 [Member]
Term Loan Agreement [Line Items]
Principal prepayment premium percentage	0.00%
CRG Servicing LLC [Member] \| Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
Agreement date	Feb. 13, 2019
Senior secured term loan borrowing facility	$ 60,000,000
Term loan agreement, initial advance	$ 35,000,000
Line of Credit Facility, Remaining Borrowing Capacity subject to milestone achievement										$ 10,000,000
Maturity date	Dec. 31, 2023
Annual interest rate on term loan balance	12.50%
Paid in Kind Interest Added to Principal					$ 728,000			$ 728,000
Exit fee percentage payable upon repayment of the total secured term loan	6.00%
Upfront loan original fee payment, initial advance	$ 525,000
Reimbursement of lender's legal fees and other transaction costs	350,000
Exit fee accrued	2,100,000
Line of credit facility, legal and other transaction costs	591,000
CRG Servicing LLC [Member] \| Second Advance [Member]
Term Loan Agreement [Line Items]
Term loan agreement, additional loan advance										$ 15,000,000
Total debt discount	$ 1,100,000
CRG Servicing LLC [Member] \| Second Advance [Member] \| Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
One-time upfront financing fee percentage applied to borrowing amounts under the line of credit facility	1.50%
Upfront loan original fee payment, initial advance	$ 225,000
Exit fee accrued	$ 900,000
CRG Servicing LLC [Member] \| Initial Advance [Member] \| Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
One-time upfront financing fee percentage applied to borrowing amounts under the line of credit facility	1.50%
Upfront loan original fee payment, initial advance	$ 525,000
SWK Funding LLC [Member] \| Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
Agreement date			Mar. 28, 2018
Senior secured term loan borrowing facility			$ 20,000,000
Term loan agreement, initial advance			$ 15,000,000
Maturity date			Mar. 27, 2023
Exit fee percentage payable upon repayment of the total secured term loan			6.00%
Amortization of debt discount (premium)						$ 84,000
Senior secured term loan, additional advance that followed satisfaction of applicable conditions		$ 5,000,000
Loss on extinguishment of debt						(3,800,000)
Write-off of remaining unamortized debt discount included as a component of the loss on extinguishment of debt						$ 2,300,000
Amortized deferred debt issue costs and debt discount							$ 153,000		$ 362,000
SWK Funding LLC [Member] \| Senior Secured Term Loan [Member] \| Loan Refinancing [Member]
Term Loan Agreement [Line Items]
Prepayment penalty for voluntary repayment of the secured term loan	1,200,000
Payment of contractual 6% exit fee upon repayment of secured term loan	1,200,000
Payment of accrued and unpaid interest through the date of the secured term loan refinancing	664,000
Payment of additional make-whole interest from the loan refinancing date through the first anniversary of the secured term loan (Mar 28, 2019)	306,000
SWK Funding LLC [Member] \| Senior Secured Term Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Term Loan Agreement [Line Items]
Interest rate								Three-month LIBOR rate (subject to a 1.5% floor) plus 10.50%.
LIBOR rate floor			1.50%
Interest rate percentage above LIBOR rate			10.50%
Repayment of senior secured term loan	$ 20,000,000
First Tranche Advance [Member] \| SWK Senior Secured Term Loan [Member]
Term Loan Agreement [Line Items]
Upfront loan origination fee percentage			1.50%
Total debt discount			$ 2,100,000
Cost allocated tranches, number \| Tranche			2
Loan origination fee, exit fee and other loan transaction costs			$ 1,800,000
Aggregate fair value of warrants			$ 353,000

Stockholders' Equity - 2019 Equity Financing - Additional Information (Detail) - USD ($)		1 Months Ended	3 Months Ended	9 Months Ended
	Apr. 01, 2019	Jan. 31, 2019	Sep. 30, 2019	Sep. 30, 2019
At-the-Market Offering [Member]
Class of Stock [Line Items]
Common stock shares maximum aggregate offering price		$ 20,000,000
Stock issuances, sales agent commission maximum percentage		3.00%
Common stock issued			1,707,995	1,707,995
Weighted average common stock price per share			$ 1.50	$ 1.50
Gross proceeds from issuance of common stock			$ 2,600,000	$ 2,600,000
Share issuance costs			$ 151,000	$ 151,000
2019 Equity Financing [Member] \| Share Offering [Member]
Class of Stock [Line Items]
Common stock issued	10,526,500
Gross proceeds from issuance of common stock	$ 20,000,000
Share issuance costs	$ 1,700,000
Price per share	$ 1.90

Stockholders' Equity - 2018 Equity Financing - Additional Information (Detail) - USD ($)					1 Months Ended	3 Months Ended			9 Months Ended	12 Months Ended
	Jun. 30, 2018	Jun. 25, 2018	Jun. 22, 2018	Mar. 28, 2018	Sep. 30, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2019	Dec. 31, 2018	Jun. 21, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Common Stock, Shares Authorized		150,000,000									150,000,000	150,000,000
Change in fair value of derivative liability						$ (18,886,000)			$ (45,164,000)
Exercise price of Second Tranche Warrants					$ 1.23	$ 1.23			$ 1.23		$ 1.23	$ 1.23		$ 0
First Tranche Securities Purchase Agreement [Member]
Class of Stock [Line Items]
Common stock issued to investors				8,606,324
Common stock price per share				$ 1.10
Gross proceeds from issuance of common stock				$ 9,500,000
Portion of First Tranche net proceeds allocated to equity				$ 4,600,000
Second Securities Purchase Agreement [Member]
Class of Stock [Line Items]
Gross proceeds to be received from issuance of common shares, subject to stockholder approval			$ 25,500,000
2018 Equity Financing [Member]
Class of Stock [Line Items]
Common Stock, Shares Authorized													120,000,000
Share issuance costs								$ 343,000
2018 Equity Financing [Member] \| Second Tranche Transaction [Member]
Class of Stock [Line Items]
Units issued to investors, with each Unit consisting of one common share and one warrant to purchase one common share		20,184,224
Unit price per share		$ 1.265
Gross proceeds from issuance of units		$ 25,500,000
Fair value of derivative liability								6,900,000
Change in fair value of derivative liability								$ 2,200,000		$ 22,200,000
Reclassification of the derivative liability balance to equity upon the exercise of the Second Tranche Warrants										$ 29,100,000
2018 Equity Financing [Member] \| Second Tranche Warrants [Member]
Class of Stock [Line Items]
Change in fair value of derivative liability	$ 1,600,000				$ 18,900,000		$ 18,200,000
Reclassification of the derivative liability balance to equity upon the exercise of the Second Tranche Warrants					$ 38,700,000
Exercise price of Second Tranche Warrants					$ 1.43	$ 1.43			$ 1.43

Stockholders' Equity - Summary of Reconciliation of Warrants to Purchase Share of the Company's Common Stock (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Stockholders Equity Note [Abstract]
Number of Warrants, Outstanding and exercisable, Beginning balance	486,812	0
Number of Warrants, Issued	0	486,812
Number of Warrants, Outstanding and exercisable, Ending balance	486,812	486,812
Weighted Average Exercise Price, Outstanding and exercisable, Beginning balance	$ 1.23	$ 0
Weighted Average Exercise Price, Issued	0	1.23
Weighted Average Exercise Price, Outstanding and exercisable, Ending balance	$ 1.23	$ 1.23

Stockholders' Equity - Warrants to Purchase Common Shares - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	9 Months Ended
	Jun. 26, 2018	Mar. 28, 2018	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Warrants issued in connection with term loan facility				0	486,812
Exercise price of issued warrants				$ 0	$ 1.23
Warrants, outstanding			486,812	486,812	486,812	486,812		0
Proceeds from exercise of warrants					$ 28,863
Second Tranche Warrants [Member]
Class of Stock [Line Items]
Exercise price of issued warrants			$ 1.43
Warrants, outstanding							20,184,224
Proceeds from exercise of warrants			$ 28,900
Warrants [Member] \| Investor [Member]
Class of Stock [Line Items]
Weighted average remaining life of lender warrants				5 years 6 months 14 days
Senior Secured Term Loan [Member] \| Warrants [Member]
Class of Stock [Line Items]
Warrants issued in connection with term loan facility	77,721	409,091
Exercise price of issued warrants	$ 1.93	$ 1.10
Warrants exercise period	7 years	7 years

Share-Based Payment Awards - Equity Incentive Plans - Additional Information (Detail) - 2016 Long Term Incentive Plan [Member] - shares	Sep. 30, 2019	Jun. 25, 2019	Dec. 12, 2016
Class of Stock [Line Items]
Number of common stock, authorized for issuance		11,000,000	3,000,000
Shares available for grant under the Long Term Incentive Plan, including forfeited and terminated awards transferred from the 2008 Incentive Plan	9,630,240

Share-Based Payment Awards - Stock Option Activity Under Company's Equity Incentive Plan (Detail) - Equity Incentive Plans [Member] $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options Outstanding, Beginning balance \| shares	8,139,377
Number of Options, Granted \| shares	4,474,096
Number of Options, Exercised \| shares	(166,760)
Number of Options, Forfeited \| shares	(1,361,109)
Number of Options, Expired \| shares	(473,346)
Number of Options Outstanding, Ending balance \| shares	10,612,258
Number of Options, Exercisable at September 30, 2019 \| shares	4,957,932
Weighted Average Exercise Price Outstanding, Beginning balance \| $ / shares	$ 2.83
Weighted Average Exercise Price, Granted \| $ / shares	2.36
Weighted Average Exercise Price, Exercised \| $ / shares	1.84
Weighted Average Exercise Price, Forfeited \| $ / shares	2.49
Weighted Average Exercise Price, Expired \| $ / shares	3.77
Weighted Average Exercise Price Outstanding, Ending balance \| $ / shares	2.65
Weighted Average Exercise Price, Exercisable at September 30, 2019 \| $ / shares	$ 3.07
Weighted Average Remaining Contractual Life, Outstanding at September 30, 2019	7 years 8 months 8 days
Weighted Average Remaining Contractual Life, Exercisable at September 30, 2019	6 years 1 month 9 days
Aggregate Intrinsic Value, Outstanding at September 30, 2019 \| $	$ 289
Aggregate Intrinsic Value, Exercisable at September 30, 2019 \| $	$ 41

Share-Based Payment Awards - Stock Options - Additional Information (Detail) - shares	1 Months Ended	9 Months Ended
	Jan. 31, 2019	Sep. 30, 2019
2016 Long Term Incentive Plan [Member]
Class of Stock [Line Items]
Ratable monthly vesting period	4 years
Contractual life of option grants	10 years
Stock Compensation Plan [Member]
Class of Stock [Line Items]
Ratable monthly vesting period	1 year
Cliff vesting period	3 years
Common stock vested during the period		1,839,397
Newly Appointed Non Executive Director [Member]
Class of Stock [Line Items]
Ratable annual vesting period	3 years
External consultant [Member]
Class of Stock [Line Items]
Cliff vesting period	1 year

Share-Based Payment Awards - Summary of Company Applied the Black-Scholes Option Pricing (Detail) - 2016 Long Term Incentive Plan [Member]	9 Months Ended
	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock volatility, minimum	60.00%
Stock volatility, maximum	64.00%
Risk-free interest rate, minimum	1.29%
Risk-free interest rate, maximum	2.63%
Expected dividends	0.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option life (in years)	5 years 6 months
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option life (in years)	6 years 29 days

Share-Based Payment Awards - Summary of Information about Stock Options (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Total cash received from exercise of stock options	$ 308	$ 503
Equity Incentive Plans [Member]
Weighted-average grant date fair value per share	$ 0.95
Total cash received from exercise of stock options	$ 308
Total intrinsic value of stock options exercised	$ 63

Share-Based Payment Awards - Time-Vested Restricted Stock Units - Additional Information (Detail) - 2016 Long Term Incentive Plan [Member]	1 Months Ended	9 Months Ended
	Jan. 31, 2019	Sep. 30, 2019
Class of Stock [Line Items]
Ratable annual vesting period of equity awards	4 years
RSU [Member]
Class of Stock [Line Items]
Ratable annual vesting period of equity awards		3 years
Weighted average remaining vesting term		1 year 3 months 14 days

Share-Based Payment Awards - Summary of Restricted Stock Unit Activity (Detail) - 2016 Long Term Incentive Plan [Member] - RSU [Member]	9 Months Ended
	Sep. 30, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Stock Units Outstanding, Beginning Balance \| shares	590,213
Number of stock units, granted \| shares	587,761
Number of Stock Units, Vested \| shares	(229,294)
Number of Stock Units, Forfeited \| shares	(136,333)
Number of Stock Units Outstanding, Ending Balance \| shares	812,347
Weighted Average Grant Date Fair Value Nonvested, Beginning balance \| $ / shares	$ 1.86
Weighted average grant date fair value, granted \| $ / shares	1.90
Weighted Average Grant Date Fair value, Vested \| $ / shares	1.81
Weighted Average Grant Date Fair value, Forfeited \| $ / shares	2.18
Weighted Average Grant Date Fair Value Nonvested, Ending balance \| $ / shares	$ 1.85

Share-Based Payment Awards - Performance-Based Stock Units - Additional Information (Detail) - Performance Stock Units [Member] - shares					9 Months Ended
	Oct. 12, 2019	Mar. 19, 2019	Oct. 12, 2018	Mar. 19, 2018	Sep. 30, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Weighted average remaining vesting term					10 days
Former Chief Financial Officer [Member]
Class of Stock [Line Items]
Cumulative measurement period					3 years
Resignation date of employee					Jul. 08, 2019
Long Term Incentive Plan [Member]
Class of Stock [Line Items]
Number of Stock Units Outstanding					0	225,000
Subsequent Event [Member]
Class of Stock [Line Items]
Number of Stock Units Outstanding	56,666
Performance Condition One [Member]
Class of Stock [Line Items]
Portion of stock units subject to an FDA acceptance of the Company's NDA submission of YUTIQ for review on or before March 31, 2018					One third
Stock units vesting, percentage		50.00%		50.00%
Number of Performance-Based Stock Units, vested				48,332
Number of performance-based stock units subject to service-based vesting of one year from performance condition achievement date		48,334
Performance Condition Two [Member]
Class of Stock [Line Items]
Portion of stock units subject to an FDA approval of YUTIQ on or before March 31, 2019					Two-thirds
Stock units vesting, percentage			50.00%
Number of Performance-Based Stock Units, vested			96,668
Performance Condition Two [Member] \| Subsequent Event [Member]
Class of Stock [Line Items]
Stock units vesting, percentage	50.00%
Number of performance-based stock units subject to service-based vesting of one year from performance condition achievement date	96,666
Inducement Award Grants [Member] \| Former Chief Financial Officer [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award					The PSUs are subject to proportional vesting based on cumulative measurement over a 3-year period, with two-thirds of the award based upon the achievement of defined amounts of the Company’s product revenues through June 30, 2021 and one-third of the award based upon the net present value of each applicable business development transaction, as defined, through August 1, 2021 measured as of the date that each such transaction is consummated by the Company.

Share-Based Payment Awards - Summary of Performance Stock Unit Activity (Detail) - 2016 Long Term Incentive Plan [Member] - Performance Stock Units [Member]	9 Months Ended
	Sep. 30, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Stock Units Outstanding, Beginning Balance \| shares	370,000
Number of Stock Units, Vested \| shares	(58,334)
Number of Stock Units, Forfeited \| shares	(255,000)
Number of Stock Units Outstanding, Ending Balance \| shares	56,666
Weighted Average Grant Date Fair Value Nonvested, Beginning balance \| $ / shares	$ 2.01
Weighted Average Grant Date Fair value, Vested \| $ / shares	1.56
Weighted Average Grant Date Fair value, Forfeited \| $ / shares	2.26
Weighted Average Grant Date Fair Value Nonvested, Ending balance \| $ / shares	$ 1.34

Share-Based Payment Awards - Deferred Stock Units - Additional Information (Detail) - shares	1 Months Ended	9 Months Ended
	Jan. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
2016 Long Term Incentive Plan [Member]
Class of Stock [Line Items]
Ratable annual vesting period of equity awards	4 years
Non Executive Directors [Member]
Class of Stock [Line Items]
Non-vested deferred stock units outstanding		0	35,418
Deferred Stock Units [Member]
Class of Stock [Line Items]
Non-vested deferred stock units outstanding			35,418
Ratable annual vesting period of equity awards		1 year
Deferred Stock Units [Member] \| 2016 Long Term Incentive Plan [Member]
Class of Stock [Line Items]
Vested deferred stock units vested		71,251

Share-Based Payment Awards - Summary of Deferred Stock Unit Activity (Detail) - Deferred Stock Units [Member]	9 Months Ended
	Sep. 30, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Stock Units Outstanding, Beginning Balance \| shares	35,418
Number of Stock Units, Vested \| shares	(35,418)
Weighted Average Grant Date Fair Value Nonvested, Beginning balance \| $ / shares	$ 1.95
Weighted Average Grant Date Fair value, Vested \| $ / shares	$ 1.95

Share-Based Payment Awards - Market-Based Restricted Stock Units - Additional Information (Detail) - Market-based RSUs [Member] - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Restricted stock units outstanding	0	500,000
Change in closing price of common stock period	3 years
Grant date fair value per share	$ 1.45

Share-Based Payment Awards - Employee Stock Purchase Plan - Additional Information (Detail) - USD ($)	Jun. 25, 2019	Sep. 30, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Common stock, shares issued		108,029,244	95,372,236
Employee Stock Purchase Plan [Member]
Class of Stock [Line Items]
Shares of common stock reserved for issuance	1,100,000
Price of common stock purchased twice a year under ESPP, percent	85.00%
Employee stock purchase plan aggregate fair market value of common stock	$ 25,000
Employee stock purchase plan aggregate fair market value of common stock shares	50,000
Offering period, start date	Aug. 01, 2019
Offering period, end date	Jan. 31, 2020
Common stock, shares issued		0

Share-Based Payment Awards - Compensation Expense from Stock-Based Payment Awards (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 977	$ 1,397	$ 3,711	$ 2,814
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	210	486	874	1,145
Sales and Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	189	263	512	314
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 578	$ 648	$ 2,325	$ 1,355

Share-Based Payment Awards - Stock-Based Compensation Expense - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Unrecognized compensation expense	$ 4.3
Unrecognized compensation expense weighted average period	1 year 6 months 14 days

Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets:
Cash equivalents	$ 31,386	$ 43,194
Total cash equivalents	31,386	43,194
Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Cash equivalents	31,386	43,194
Total cash equivalents	31,386	43,194
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Cash equivalents	0	0
Total cash equivalents	0	0
Significant Unobservable Inputs (Level 3) [Member]
Assets:
Cash equivalents	0	0
Total cash equivalents	$ 0	$ 0

Fair Value Measurements - Additional Information (Detail) - $ / shares		1 Months Ended	9 Months Ended
	Mar. 28, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exercise price of issued warrants			$ 0	$ 1.23
Remeasurement of second tranche transaction liability to fair value description			This valuation at settlement was calculated as the excess of the sum of (i) the fair value of the Second Tranche Warrants and (ii) the fair value of the shares of Common Stock issued to settle the liability over the cash proceeds received by the Company for the Units.
Second Tranche Transaction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Common Stock purchase price description			The purchase price for each share of Common Stock issuable in the Second Tranche Transaction was defined as the lower of (a) $1.265 (which was a 15% premium to the First Tranche Purchase Price) and (b) a 20% discount to the volume weighted average price (“VWAP”) of the shares of Common Stock on the Nasdaq Stock Market for the 20 trading days immediately prior to the closing of the Second Tranche Transaction; provided, however, that the purchase price could not be lower than $0.88, which was a 20% discount to the First Tranche Purchase Price.
Percentage discount to volume weighted average price for 20 days immediately preceding the closing of the Second Tranche Transaction	20.00%
Second Tranche Transaction [Member] \| Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Common stock price per share	$ 1.265
Percentage of premium to first tranche share purchase price	15.00%
Second Tranche Transaction [Member] \| Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Common stock price per share	$ 0.88
Percentage of discount to first tranche share purchase price	20.00%
Second Tranche Warrants [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage discount to volume weighted average price for 20 days immediately preceding the closing of the Second Tranche Transaction		20.00%
Warrant purchase price description			The exercise price of each Second Tranche Warrant was an amount equal to the lower of (a) $1.43 (a 30% premium to the First Tranche Purchase Price) and (b) a 20% discount to the VWAP of the shares of the Company’s Common Stock on Nasdaq for the 20 trading days immediately prior to the exercise of a Second Tranche Warrant; provided, however, that the exercise price could not be lower than $0.88, which was a 20% discount to the First Tranche Purchase Price.
Exercise price of issued warrants		$ 1.43
Second Tranche Warrants [Member] \| Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exercise price of issued warrants		$ 1.43
Percentage of premium to first tranche share purchase price		30.00%
Second Tranche Warrants [Member] \| Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of discount to first tranche share purchase price		20.00%
Exercise price of issued warrants		$ 0.88

Fair Value Measurements - Schedule of Assumptions Used to Value Liability (Detail) - Second Tranche Transaction Liability [Member]	Jun. 25, 2018 shares	Mar. 28, 2018 shares
Estimated date of stockholder approval		2018-06
Estimated number of units issuable	20,184,224	26,900,000
Measurement Input, Price Volatility % [Member]
Measurement input		54.20
Measurement Input, Risk Free Interest Rate % [Member]
Measurement input		1.70
Measurement Input, Valuation Date Stock Price % [Member]
Measurement input	1.93	1.07

Fair Value Measurements - Summary of Changes in Fair Value of the Company's Derivative Liability (Detail) - Significant Unobservable Inputs (Level 3) [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 0
Initial fair value of derivative liability	22,968
Change in fair value	44,838
Reclassification to equity	(38,753)
Settlement	(29,053)
Ending balance	0
Additional Advance Warrant Liability [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	0
Initial fair value of derivative liability	69
Change in fair value	18
Reclassification to equity	(87)
Settlement	0
Ending balance	0
Second Tranche Transaction Liability [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	0
Initial fair value of derivative liability	4,734
Change in fair value	24,319
Reclassification to equity	0
Settlement	(29,053)
Ending balance	0
Second Tranche Warrants [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	0
Initial fair value of derivative liability	18,165
Change in fair value	20,501
Reclassification to equity	(38,666)
Settlement	0
Ending balance	$ 0

Net Loss per Share - Potentially Dilutive Securities Excluded from Computation of Diluted Weighted-Average Shares (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents outstanding excluded from diluted earnings per share calculation	12,022,978	10,369,196	12,022,978	10,369,196
Stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents outstanding excluded from diluted earnings per share calculation	10,612,258	7,984,469	10,612,258	7,984,469
ESPP [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents outstanding excluded from diluted earnings per share calculation	54,895		54,895
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents outstanding excluded from diluted earnings per share calculation	486,812	486,812	486,812	486,812
Restricted stock units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents outstanding excluded from diluted earnings per share calculation	812,347	1,395,829	812,347	1,395,829
Performance Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents outstanding excluded from diluted earnings per share calculation	56,666	466,668	56,666	466,668
Deferred Stock Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents outstanding excluded from diluted earnings per share calculation		35,418		35,418