Document

Restricted
Stock

Weighted-Average
Grant Date
Fair Value

Unvested at December 31, 2017

Unvested at March 31, 2018

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)



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

For the quarterly period ended March 31, 2018



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

For the transition period from to

Commission File No. 001-36296

Eleven Biotherapeutics, Inc.

(Exact name of registrant as specified in its charter)



DELAWARE	26-2025616
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)



245 First Street, Suite 1800 Cambridge, MA	02142
(Address of principal executive offices)	(Zip code)

Registrant’s telephone number, including area code: (617) 444-8550

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

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). x Yes o No

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



Large Accelerated filer	o	Accelerated filer	o
Non-accelerated filer	o (Do not check if a smaller reporting company)	Smaller reporting company	x
		Emerging growth company	x

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act.):

o Yes x No

Number of outstanding shares of Common Stock as of May 10, 2018: 48,390,072

Table of Contents

ELEVEN BIOTHERAPEUTICS, INC.

TABLE OF CONTENTS



		Page
PART I
Item 1.	Condensed Consolidated Financial Statements (Unaudited)	1
	Condensed Consolidated Balance Sheets as of March 31, 2018 and December 31, 2017	1
	Condensed Consolidated Statements of Operations and Comprehensive Loss for the Three Months Ended March 31, 2018 and 2017	2
	Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2018 and 2017	3
	Notes to Unaudited Condensed Consolidated Financial Statements	4
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	12
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	23
Item 4.	Controls and Procedures	23

PART II
Item 1.	Legal Proceedings	25
Item 1A.	Risk Factors	25
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	26
Item 3.	Defaults Upon Senior Securities	26
Item 4.	Mine Safety Disclosures	26
Item 5.	Other Information	26
Item 6.	Exhibits	26

Table of Contents

FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, contained in this Quarterly Report on Form 10-Q, including statements regarding our strategy, future operations, future product research or development, future financial position, future revenues, projected costs, prospects, plans and objectives of management, are forward-looking statements. The words “anticipate,” “believe,” “goals,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “predict,” “project,” “target,” “potential,” “will,” “would,” “could,” “should,” “continue” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words.

The forward-looking statements in this Quarterly Report on Form 10-Q include, among other things, statements about:


•	our expected future loss and accumulated deficit levels;


•	our projected financial position and estimated cash burn rate;


•	our estimates regarding expenses, future revenues, capital requirements and needs for, and ability to obtain, additional financing;


•	our ability to continue as a going concern;


•	our need to raise substantial additional capital to fund our operations;


•	the potential impairment of our goodwill and our indefinite-lived intangible assets;


•	the effect of recent changes in our senior management team on our business;


•	the success, cost and timing of our pre-clinical studies and clinical trials in the United States, Canada and in other foreign jurisdictions;


•	the potential that results of pre-clinical studies and clinical trials indicate our product candidates are unsafe or ineffective;


•	our dependence on third parties, including contract research organizations, or CROs, in the conduct of our pre-clinical studies and clinical trials;


•	the difficulties and expenses associated with obtaining and maintaining regulatory approval of our product candidates and companion diagnostics, if any, in the United States, Canada and in other foreign jurisdictions, and the labeling under any approval we may obtain;


•	our plans and ability to develop and commercialize our product candidates;


•	our ability to achieve certain future regulatory, development and commercialization milestones under our license agreement, which we refer to as the License Agreement, with F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc., or collectively, Roche;


•	market acceptance of our product candidates, the size and growth of the potential markets for our product candidates, and our ability to serve those markets;


•	obtaining and maintaining intellectual property protection for our product candidates and our proprietary technology;


•	the successful development of our commercialization capabilities, including sales and marketing capabilities; and


•	the success of competing therapies and products that are or become available.

Our product candidates are investigational biologics undergoing clinical development and have not been approved by or submitted for approval to the U.S. Food and Drug Administration, or FDA, Health Canada, or the European Commission. Our product candidates have not been, nor may they ever be, approved by any regulatory agency or competent authorities nor marketed anywhere in the world.

We may not actually achieve the plans, intentions or expectations disclosed in our forward-looking statements, and our stockholders should not place undue reliance on our forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in the forward-looking statements we make. We have included important factors in the cautionary statements included in this Quarterly Report on Form 10-Q, particularly in the “Risk Factors” section, that could cause actual results or events to differ materially from the forward-looking statements that we make. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures or investments we may make.

You should read this Quarterly Report on Form 10-Q and the documents that we have filed as exhibits to this Quarterly Report on Form 10-Q completely and with the understanding that our actual future results may be materially different from what we expect. The forward-looking statements contained in this Quarterly Report on Form 10-Q are made as of the date of this Quarterly Report on Form 10-Q, and we do not assume any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by applicable law.

Table of Contents

PART I—FINANCIAL INFORMATION

Item 1. Financial Statements

ELEVEN BIOTHERAPEUTICS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited)

(in thousands, except share and per share data)



	March 31, 2018			December 31, 2017
Assets
Current assets:
Cash and cash equivalents	$	19,688		$	14,680
Prepaid expenses and other current assets	638			301
Total current assets	20,326			14,981
Property and equipment, net	473			522
Restricted cash	10			10
Intangible assets	46,400			46,400
Goodwill	13,064			13,064
Other assets	19			120
Total assets	$	80,292		$	75,097
Liabilities and stockholders’ equity
Current liabilities:
Accounts payable	$	1,393		$	907
Accrued expenses	3,853			3,813
Total current liabilities	5,246			4,720
Other liabilities	260			215
Deferred tax liability	12,528			12,528
Contingent consideration	38,400			39,600
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value per share; 5,000,000 shares authorized at March 31, 2018 and December 31, 2017 and no shares issued and outstanding at March 31, 2018 and December 31, 2017	—			—
Common stock, $0.001 par value per share; 200,000,000 shares authorized at March 31, 2018 and December 31, 2017 and 43,105,466 and 34,702,565 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	43			35
Additional paid-in capital	180,109			170,330
Accumulated deficit	(156,294		)	(152,331		)
Total stockholders’ equity	23,858			18,034
Total liabilities and stockholders’ equity	$	80,292		$	75,097

See accompanying notes.

Table of Contents

ELEVEN BIOTHERAPEUTICS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(unaudited)

(in thousands, except per share data)



	Three Months Ended March 31,
	2018			2017
Revenue:
License revenue	—			425
Total revenue	—			425
Operating expenses:
Research and development	3,255			2,874
General and administrative	1,952			2,213
(Gain) Loss from change in fair value of contingent consideration	(1,200		)	1,500
Total operating expenses	4,007			6,587
Loss from operations	(4,007		)	(6,162		)
Other income:
Other income, net	44			101
Total other income, net	44			101
Net loss and comprehensive loss	$	(3,963	)	$	(6,061	)
Net loss per share — basic and diluted	$	(0.11	)	$	(0.25	)
Weighted-average number of common shares used in net loss per share — basic and diluted	35,674			24,610

See accompanying notes.

Table of Contents

ELEVEN BIOTHERAPEUTICS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited)

(in thousands)



	Three Months Ended March 31,
	2018			2017
Operating activities
Net loss	$	(3,963	)	$	(6,061	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	49			82
Stock-based compensation expense	401			244
Change in fair value of warrant liability	—			(3		)
Loss from change in fair value of contingent consideration	(1,200		)	1,500
Gain on sale of equipment	(5		)	(76		)
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(236		)	(127		)
Accounts payable	486			(453		)
Accrued expenses and other liabilities	85			123
Deferred revenue	—			(425		)
Due to related party	—			1
Net cash used in operating activities	(4,383		)	(5,195		)
Investing activities
Sales of equipment	5			76
Net cash provided by investing activities	5			76
Financing activities
Proceeds from exercise of common stock options	—			40
Proceeds from issuance of common stock and common stock warrants, net of issuance costs	9,376			—
Proceeds from sale of common stock pursuant to ESPP	10			5
Net cash provided by financing activities	9,386			45
Net increase (decrease) in cash, cash equivalents and restricted cash	5,008			(5,074		)
Cash, cash equivalents and restricted cash at beginning of period	14,690			25,352
Cash, cash equivalents and restricted cash at end of period	$	19,698		$	20,278
Supplemental non-cash investing and financing activities

See accompanying notes.

Table of Contents

ELEVEN BIOTHERAPEUTICS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1. Organization and Basis of Presentation

Eleven Biotherapeutics, Inc. (the “Company”), a Delaware corporation, is a biologics oncology company focused primarily on designing, engineering and developing targeted next generation antibody drug conjugates ("ADC"s). The Company's next generation ADCs are single protein therapeutics composed of targeting moieties genetically fused via linker domains to cytotoxic protein payloads that are produced through the Company's proprietary one-step manufacturing process. The Company targets tumor cell surface antigens that allow for rapid internalization into the targeted cancer cell while also having limited expression on normal cells. The Company has designed its next generation ADCs to overcome the fundamental efficacy and safety challenges inherent in existing ADCs, where a payload is chemically attached to a targeting antibody.

Basis of presentation

The condensed consolidated financial statements as of March 31, 2018 and December 31, 2017 and for the three months ended March 31, 2018 and 2017 and the related information contained within the notes to the condensed consolidated financial statements are unaudited. The unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting standards applicable to interim financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to present fairly the Company’s consolidated financial position as of March 31, 2018 and its results of operations and its cash flows for the three months ended March 31, 2018 and 2017. The financial data and the other financial information disclosed in these notes to the condensed consolidated financial statements related to the three-month periods are also unaudited. The results of operations for the three months ended March 31, 2018 are not necessarily indicative of the results to be expected for the year ending December 31, 2018 or for any other future annual or interim period. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 that was filed with the Securities and Exchange Commission (“SEC”) on April 2, 2018 (the "2017 Form 10-K").

The condensed consolidated financial statements include the accounts of Eleven Biotherapeutics, Inc., its wholly owned subsidiary, Viventia Bio Inc. ("Viventia"), and its indirect subsidiaries, Viventia Bio USA Inc. and Viventia Biotech (EU) Limited. All inter-company transactions and balances have been eliminated in consolidation. The condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles.

The functional currency of Viventia Bio Inc., Viventia Bio USA Inc. and Viventia Biotech (EU) Limited is the U.S. dollar.

Liquidity

The Company has financed its operations to date primarily through debt and equity offerings and collaboration and licensing arrangements. As of March 31, 2018, the Company had cash and cash equivalents totaling $19.7 million, net working capital of $15.1 million and an accumulated deficit of $156.3 million.

On March 23, 2018, the Company raised approximately $9.0 million of net proceeds from the sale of 7,968,128 shares of common stock at a price of $1.13 per share in a registered direct offering and the sale of common stock purchase warrants to purchase 7,968,128 shares of common stock at a price of $0.125 for each warrant to purchase one share of common stock in a concurrent private placement (collectively, the “March 2018 Financing”). Subject to certain ownership limitations, the common stock purchase warrants issued in the March 2018 Financing were exercisable immediately upon issuance at an exercise price equal to $1.20 per share of common stock, subject to adjustments as provided under the terms of such common stock purchase warrants. The common stock purchase warrants are exercisable for five years from March 23, 2018.

In addition, between April 1, 2018 and May 10, 2018, the Company received proceeds of $4.2 million from the issuance of 5.2 million shares of common stock due to the exercise of common stock purchase warrants issued in connection with its underwritten public offering in November 2017 ("November 2017 Financing").

Management must evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date that the financial statements are issued. This evaluation initially does not take into consideration the potential mitigating effect of management’s plans that have not been fully implemented as of the date the financial statements are issued. When substantial doubt exists, management evaluates whether the mitigating effect of its plans sufficiently alleviates substantial doubt about the Company’s ability to continue as a going concern. The mitigating effect of management’s plans, however, is only considered if both (1) it is probable

Table of Contents

that the plans will be effectively implemented within one year after the date that the financial statements are issued, and (2) it is probable that the plans, when implemented, will mitigate the relevant conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued. Generally, to be considered probable of being effectively implemented, the plans must have been approved by the Company’s board of directors ("Board") before the date that the financial statements are issued.

The future success of the Company is dependent on its ability to develop its product candidates and ultimately upon its ability to attain profitable operations. The Company is subject to a number of risks similar to other early-stage life science companies, including, but not limited to, successful discovery and development of its product candidates, raising additional capital with favorable terms, development by its competitors of new technological innovations, protection of proprietary technology and market acceptance of the Company’s products. The successful discovery and development of product candidates requires substantial working capital which may not be available to the Company on favorable terms or not at all.

To date, the Company has no revenue from product sales and management expects continuing operating losses in the future. As of March 31, 2018, the Company had available cash and cash equivalents of $19.7 million, which it believes, together with the additional $4.2 million of proceeds received between April 1, 2018 and May 10, 2018 from the issuance of 5.2 million shares of common stock due to the exercise of common stock purchase warrants issued in the November 2017 Financing, is not sufficient to fund the Company’s current operating plan for twelve months from the date of issuance of these financial statements. Management expects to seek additional funds through equity or debt financings or through additional collaboration, licensing transactions or other sources. The Company may be unable to obtain equity or debt financings or enter into additional collaboration or licensing transactions and, if necessary, the Company will be required to implement cost reduction strategies. These factors raise substantial doubt about the Company’s ability to continue as a going concern. The accompanying condensed consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and satisfaction of liabilities in the ordinary course of business. The condensed consolidated financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of this uncertainty.

2. Significant Accounting Policies and Recent Accounting Pronouncements

Recently adopted accounting standards

In May 2014, the FASB issued ASU No. 2014-09, codified as Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers ("ASC 606"), which supersedes all existing revenue recognition requirements, including most industry-specific guidance. The new standard requires a company to recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. The new standard was effective on January 1, 2018 and the Company adopted this standard using the modified retrospective approach. As a result of this adoption, no amounts were recorded as a cumulative effect adjustment to accumulated deficit as of January 1, 2018.

In May 2017, the FASB issued ASU No. 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting ("ASU 2017-09"). This update clarifies the changes to terms or conditions of a share-based payment award that require an entity to apply modification accounting. ASU 2017-09 is effective as of January 1, 2018. The adoption of this guidance did not have an impact on the Company's financial position, results of operations or cash flows.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. ASU 2016-18 requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash or restricted cash equivalents. Amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 was effective for annual and interim periods beginning after December 15, 2017, with early adoption permitted. The Company adopted this standard effective January 1, 2018. Upon adoption of ASU 2016-18, the Company applied the retrospective transition method for each period presented and included $10,000 of restricted cash in the beginning-of-period and end-of-period cash, cash equivalents and restricted cash balance reflected in the condensed consolidated statement of cash flows for the three months ended March 31, 2017. A reconciliation of cash, cash equivalents and restricted cash for each period presented is provided in note 9 to the condensed consolidated financial statements.

On December 22, 2017, the Tax Cuts and Jobs Act (the “Act”) was enacted in the United States. The Act reduces the U.S. federal corporate tax rate from 34% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred and creates new taxes on certain foreign sourced earnings. In December 2017, the SEC issued guidance under SAB No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act directing taxpayers to consider the impact of the U.S. legislation as “provisional” when it does not have the necessary information

Table of Contents

available, prepared or analyzed (including computations) in reasonable detail to complete its accounting for the change in tax law. As of March 31, 2018, the Company had not yet completed its accounting for all of the tax effects of the enactment of the Act.

Recently issued accounting pronouncements

In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842) ("ASU 2016-02"). ASU

2016-02 addresses the financial reporting of leasing transactions. Under current guidance for lessees, leases are only included

on the balance sheet if certain criteria, classifying the agreement as a capital lease, are met. This update will require the

recognition of a right-of-use asset and a corresponding lease liability, discounted to the present value, for all leases that extend

beyond 12 months. For operating leases, the asset and liability will be expensed over the lease term on a straight-line basis, with all cash flows included in the operating section of the statement of cash flows. For finance leases, interest on the lease liability will be recognized separately from the amortization of the right-of-use asset in the statement of operations and the repayment of the principal portion of the lease liability will be classified as a financing activity while the interest component will be included in the operating section of the statement of cash flows. This guidance is effective for annual and interim reporting periods beginning after December 15, 2018. Early adoption is permitted. The Company has not yet completed the analysis of how adopting this guidance will affect its consolidated financial statements.

Critical accounting policies

There have been no material changes to the critical accounting polices recently disclosed in the 2017 Form 10-K other than the adoption of ASU 2014-09 and related updates which are codified as ASC 606.

The Company enters into collaboration agreements with strategic partners for the development and commercialization of product candidates which are within the scope of ASC 606. Under these agreements, the Company license rights to certain of the Company’s product candidates and may complete other performance obligations, such as the deliver of drug product or research and development services. The terms of these arrangements typically include payment of non-refundable upfront fees, milestone payments, and royalties on net sales of licensed products and may also contain additional payment provisions.

Under ASC 606, an entity recognizes revenue when its 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 the appropriate amount of revenue to be recognized for arrangements determined to be within the scope of ASC 606, the Company performs the following five steps: (i) identification of the promised goods or services in the contract, (ii) determination of whether the promised goods or services are performance obligations included whether they are distinct in the context of the contact, (iii) measurement of the transaction price, including the constraint on variable consideration, (iv) allocation of the transaction price to the performance obligations, and (v) recognition of revenue when the Company satisfies each performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect consideration it is entitled to in exchange for the goods or services it transfers to the customer.

The Company estimates the transaction price based on the amount expected to be received for transferring the promised goods or services in the contract. The consideration may include fixed consideration or variable consideration. At the inception of each arrangement that includes variable consideration, the Company evaluates the amount of potential payments and the likelihood that the payments will be received. The Company utilizes either the most likely amount method or expected amount method to estimate the amount expected to be received based on which method best predicts the amount expected to be received. The amount of variable consideration which is included in the transaction price may be constrained, and is included in the transaction price only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized will not occur in a future period.

The Company’s contracts include development and regulatory milestone payments which are assessed under the most likely amount method and constrained if it is probable that a significant revenue reversal would occur. At the end of each reporting period, the Company re-evaluates the probability of achievement of such milestones and any related constraint, and if necessary, adjusts its estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect revenue in the period of adjustment.

For arrangements that include sales-based royalties, including milestone payments based on the level of sales, and the license is deemed to be the predominant item to which the royalties relate, the Company recognizes revenue at the later of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). To date, the Company has not recognized any consideration related to sales-based royalty revenue resulting from any of the Company’s collaboration arrangements.

Table of Contents

The Company allocates the transaction price based on the estimated stand-alone selling price of each of the performance obligations. The Company must develop assumptions that require judgment to determine the stand-alone selling price for each performance obligation identified in the contract.

The consideration allocated to each performance obligation is recognized as revenue when control is transferred for the related goods or services.

3. Fair Value of Financial Instruments

The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels as follows: Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly; and Level 3 inputs are unobservable inputs that reflect the Company’s own assumptions about the assumptions market participants would use in pricing the asset or liability. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

The following table presents information about the Company’s financial assets and liabilities that have been measured at fair value, and indicates the fair value hierarchy of the valuation inputs utilized to determine such fair value. The Company determines the fair value of the common stock warrants and contingent consideration using Level 3 inputs.

The following table summarizes the assets and liabilities measured at fair value on a recurring basis at March 31, 2018 (in thousands):



Description	March 31, 2018		Active Markets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	$	19,688	$	19,688	$	—	$	—
Restricted cash	10		10		—		—
Total assets	$	19,698	$	19,698	$	—	$	—
Liabilities:
Contingent consideration	38,400		—		—		38,400
Total liabilities	$	38,400	$	—	$	—	$	38,400

The following table summarizes the assets and liabilities measured at fair value on a recurring basis at December 31, 2017 (in thousands):



Description	December 31, 2017		Active Markets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	$	14,680	$	14,680	$	—	$	—
Restricted cash	10		10		—		—
Total assets	$	14,690	$	14,690	$	—	$	—
Liabilities:
Contingent consideration	39,600		—		—		39,600
Total liabilities	$	39,600	$	—	$	—	$	39,600

Contingent consideration

In 2016, the Company acquired Viventia Bio, Inc. ("Viventia") through the issuance of common stock and contingent consideration (the "Acquisition"). The Company has valued the acquired assets and liabilities based on their estimated fair values as of September 20, 2016 and finalized its purchase accounting for the Acquisition during the third quarter of 2017. The contingent consideration relates to amounts potentially payable to Viventia's shareholders pursuant to the terms of the share purchase agreement. Contingent consideration is measured at fair value and is based on significant inputs not observable in the

Table of Contents

market, which represents a Level 3 measurement within the fair value hierarchy. The valuation of contingent consideration uses assumptions the Company believes would be made by a market participant. The Company assesses these estimates on an on-going basis as additional data impacting the assumptions is obtained. Future changes in the fair value of contingent consideration related to updated assumptions and estimates are recognized within the condensed consolidated statements of operations and comprehensive loss.

Contingent consideration may change significantly as development progresses and additional data are obtained, impacting the Company’s assumptions regarding probabilities of successful achievement of related milestones used to estimate the fair value of the liability and the timing in which they are expected to be achieved. In evaluating the fair value information, considerable judgment is required to interpret the market data used to develop the estimates. The estimates of fair value may not be indicative of the amounts that could be realized in a current market exchange. Accordingly, the use of different market assumptions and/or different valuation techniques could result in materially different fair value estimates. The following table sets forth a summary of changes in the fair value of the Company's contingent consideration liability (in thousands):



Beginning balance, December 31, 2017	$	39,600
Gain from change in fair value of contingent consideration	(1,200		)
Ending balance, March 31, 2018	$	38,400

The fair value of the Company’s contingent consideration was determined using probabilities of successful achievement of regulatory milestones and commercial sales, the period in which these milestones and sales are expected to be achieved ranging from 2020 to 2033, the level of commercial sales of Vicinium, and discount rates ranging from 8.3% to 10.5% as of December 31, 2017 and 9.1% to 10.5% as of March 31, 2018. Significant changes in any of these assumptions would result in a significantly higher or lower fair value measurement.

There have been no changes to the valuation methods utilized during the three months ended March 31, 2018. The Company evaluates transfers between levels at the end of each reporting period. There were no transfers of assets or liabilities between levels during the three months ended March 31, 2018.

4. License Agreement with Roche

On June 10, 2016, the Company entered into the License Agreement with F. Hoffmann-La Roche and Hoffmann La-Roche Inc. (collectively, "Roche"), which became effective on August 16, 2016 (the "License Agreement"). Under the License Agreement, the Company granted Roche an exclusive, worldwide license, including the right to sublicense, to its patent rights and know-how related to the Company’s monoclonal antibody EBI-031 or any other IL-6 antagonist anti-IL-6 monoclonal antibody, to make, have made, use, have used, register, have registered, sell, have sold, offer for sale, import and export any product containing such an antibody or any companion diagnostic used to predict or monitor response to treatment with such a product (collectively, the “Licensed Intellectual Property”).

During 2016, the Company received an upfront license fee of $7.5 million and a milestone payment of $22.5 million. The Company is entitled to receive up to $240.0 million in additional consideration upon the achievement of specified regulatory, development and commercial milestones. Specifically, an aggregate amount of up to $175.0 million is payable to the Company for the achievement of specified milestones with respect to the first indication: $50.0 million in development milestones, $50.0 million in regulatory milestones and $75.0 million in commercialization milestones. Additional amounts of up to $65.0 million are payable upon the achievement of specified development and regulatory milestones in a second indication. In addition, the Company is entitled to receive royalty payments in accordance with a tiered royalty rate scale, with rates ranging from 7.5% to 15% for net sales of potential future products containing EBI-031 and up to 50% of these rates for net sales of potential future products containing other IL-6 compounds, with each of the royalties subject to reduction under certain circumstances and to buy-out options.

The License Agreement is subject to the provisions of ASC 606, which was adopted effective January 1, 2018 utilizing a modified retrospective method. The Company concluded that all performance obligations had been achieved as of the adoption date and therefore the full transaction price was considered earned. The transaction price was determined to be the $30.0 million received in 2016. Additional consideration to be paid to the Company upon the achievement of certain milestones will be included if it is expected that the amounts will be received and the amounts would not be subject to a constraint. As of the date of the adoption, no amounts were expected to be received from the achievement of any milestones due to the nature of the milestones and the development status of the product candidates at the time of the adoption. As a result, there were no amounts

Table of Contents

required to be recorded as a cumulative adoption adjustment as the consideration recognized under ASC 606 was consistent with the amounts recognized under the previous accounting literature.

As of March 31, 2018, the Company concluded that there would be no adjustments to the transaction price as the Company continued to not expect any amounts to be received from any milestones within the License Agreement. This is due to the nature of the milestones and the development status of the product candidates at the time of the adoption. As a result, no revenue was recognized during the three-month period ended March 31, 2018 as all performance obligations had been previously achieved and there was no change in the transaction price during the period. No revenue would have been recognized under the previous accounting literature during the three month period ended March 31, 2018 as no milestones were achieved in the period, which was the revenue recognition criteria under the previous accounting literature.

5. Accrued Expenses

Accrued expenses consisted of the following (in thousands):



	March 31, 2018		December 31, 2017
Development costs	$	2,650	$	2,581
Employee compensation (including reduction in workforce)	896		735
Professional fees	237		463
Other	70		34
	$	3,853	$	3,813

6. Share-Based Payments

Pursuant to the terms of the Company's 2014 Stock Incentive Plan (the "2014 Plan"), the number of shares authorized for issuance automatically increases on the first day of each fiscal year. On January 1, 2018, the number of shares reserved for issuance under the 2014 Plan increased by 1,388,103 shares. As of March 31, 2018, the total number of shares of common stock available for issuance under the 2014 Plan was 2,594,634.

The Company also maintains the Eleven Biotherapeutics, Inc. 2009 Stock Incentive Plan, as amended and restated, and the 2014 Employee Stock Purchase Plan ("2014 ESPP").

Stock-Based Compensation Expense

Stock-based compensation expense by award type was as follows (in thousands):



	Three Months Ended March 31,
	2018		2017
Stock options	$	375	$	187
Restricted stock	23		51
Restricted stock units	—		3
Employee stock purchase plan	3		3
	$	401	$	244

The Company allocated stock-based compensation expense as follows in the condensed consolidated statements of operations and comprehensive loss (in thousands):



	Three Months Ended March 31,
	2018		2017
Research and development expense	$	165	$	40
General and administrative expense	236		204
	$	401	$	244

Table of Contents

At March 31, 2018, there was $1.0 million of total unrecognized compensation expense related to unvested stock options and shares issued pursuant to the Company's 2014 ESPP. This unrecognized compensation expense is expected to be recognized over a weighted-average period of 2.40 years.

Stock Options

A summary of the stock option activity is presented below:



	Shares		Weighted-Average Exercise Price
Outstanding at December 31, 2017	2,695,796		$	3.16
Granted	102,500		0.93
Exercised	—		—
Cancelled or forfeited	(150,292	)	2.20
Outstanding at March 31, 2018	2,648,004		$	3.13
Exercisable at March 31, 2018	1,580,060		$	3.79
Vested and expected to vest at March 31, 2018⁽¹⁾	2,586,804		$	3.16


⁽¹⁾	Represents the number of vested stock options, plus the number of unvested stock options expected to vest. The Company adopted ASU 2016-09 as of January 1, 2017 and records forfeitures as they occur.

During the fourth quarter of 2017, the Company issued stock option awards to certain employees which contained performance vesting conditions. Certain of the vesting milestones were achieved during the fourth quarter 2017 and the expense related to these awards was recognized in full during the period. Certain other performance conditions had previously not been considered probable of vesting and therefore no expense was recognized. During the first quarter of 2018, these conditions were deemed probable of occurring and the expense for these awards has been recognized over the estimated vesting period.

Restricted Stock

From time to time, upon approval by the Board, certain employees, directors and advisors have been granted restricted shares of common stock. A summary of the restricted stock is presented below:

Employee Stock Purchase Plan

On March 14, 2018, the Company issued and sold 9,565 shares of its common stock pursuant to the 2014 ESPP at a purchase price of $0.98 per share. The Company has estimated the number of shares to be issued at the end of the current offering period and recognizes expense over the requisite service period.

7. Net (Loss) Income Per Share

Basic net (loss) income per share is calculated by dividing net (loss) income by the weighted-average shares outstanding during the period, without consideration for common stock equivalents. Diluted net (loss) income per share is calculated by adjusting weighted-average shares outstanding for the dilutive effect of common stock equivalents outstanding for the period, determined using the treasury-stock method. For purposes of the diluted net (loss) income per share calculation, stock options, unvested restricted stock, and common stock warrants are considered to be common stock equivalents.

Table of Contents

The following common stock equivalents were excluded from the calculation of diluted net (loss) income per share for the periods indicated because including them would have had an anti-dilutive effect or the exercise prices were greater than the average market price of the common shares.



	Three Months Ended March 31,
	2018	2017
Stock options	2,648,004	1,717,181
Unvested restricted stock	—	17,720
Common stock warrants	17,602,350	926,840
	20,250,354	2,661,741

8. Reduction in Workforce

In 2017, the Board approved a strategic restructuring of the Company to eliminate a portion of the Company’s workforce and recorded restructuring costs, including severance and benefits in accordance with the Company's severance benefit plan, and recorded an accrued liability of $0.1 million as of December 31, 2017. The Company paid $0.1 million in severance costs during the three month ending March 31, 2018.

The table below provides a roll-forward of the reduction in workforce liability (in thousands):



Balance as of January 1, 2017	$	111
Payments	(53		)
Balance as of March 31, 2018	$	58

9. Cash, cash equivalents and restricted cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheets that sum to the total of the same such amounts shown in the condensed consolidated statements of cash flows (in thousands):



	March 31,	December 31,
	2018	2017
Cash and cash equivalents	19,688	$	14,680
Restricted cash	10	10
Total cash, cash equivalents and restricted cash	19,698	14,690

Amounts included in restricted cash represent cash held to collateralize a credit limit with Silicon Valley Bank of $10,000 as of March 31, 2018 and December 31, 2017, respectively.

10. Subsequent Event

The Company has evaluated, for potential recognition and disclosure, events that occurred prior to the date at which the condensed consolidated financial statements were issued.

On April 9, 2018, the Company granted 970,900 stock options at an exercise price of $1.50.

From April 1, 2018 through May 10, 2018, the Company received approximately $4.2 million of net proceeds from the issuance of 5.2 million shares of common stock due to the exercise of common stock purchase warrants issued in connection with the Company's November 2017 Financing.

Table of Contents

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our condensed consolidated financial statements and the notes to those financial statements appearing elsewhere in this Quarterly Report on Form 10-Q and the audited consolidated financial statements and notes thereto and management's discussion and analysis of financial condition and results of operations for the year ended December 31, 2017 included in our Annual Report on Form 10-K. This discussion and analysis contains forward-looking statements that involve risks and uncertainties. As a result of many factors, including those factors set forth in Part II, Item 1A, "Risk Factors" of this Quarterly Report on Form 10-Q and in Part I, Item IA, “Risk Factors” of our Annual Report on Form 10-K which are incorporated herein by reference, our actual results could differ materially from the results described in or implied by the forward-looking statements.

Overview

We are a biologics oncology company focused primarily on designing, engineering and developing targeted next generation ADCs. Our next generation ADCs are single protein therapeutics composed of targeting moieties genetically fused via a peptide linker domain to cytotoxic protein payloads that are produced through our proprietary one-step manufacturing process. We target tumor cell surface antigens that allow for rapid internalization into the targeted cancer cell while having limited expression on normal cells. We have designed our next generation ADCs to overcome the fundamental efficacy and safety challenges inherent in existing ADCs, where a payload is chemically attached to a targeting antibody.

Our most advanced product candidate is VB4-845, also known as Vicinium^TM for the treatment of high-grade non-muscle invasive bladder cancer, or NMIBC, which is a locally-administered next generation ADC. In a completed Phase 2 clinical trial, of the 45 evaluable subjects treated with Vicinium, 40% achieved a complete response or no evidence of disease at three months while 16% remained disease-free for at least 18 months. In the third quarter of 2015, we, through our subsidiary, Viventia Bio Inc., or Viventia, commenced in the United States and Canada a Phase 3 clinical trial of Vicinium for the treatment of subjects with high-grade non-muscle invasive bladder cancer, or NMIBC. We completed enrollment in this clinical trial of the primary endpoint population, subjects with carcinoma in situ, in March 2018 and anticipate reporting three-month data in May 2018 and twelve-month data in mid-2019. In June 2017, we entered into a Cooperative Research and Development Agreement, or CRADA, with the National Cancer Institute, or NCI, for the development of Vicinium in combination with AstraZeneca’s immune checkpoint inhibitor, durvalumab, for the treatment of NMIBC. Under the terms of the CRADA, the NCI will conduct a Phase 1 clinical trial in subjects with high-grade NMIBC to evaluate the safety, efficacy and biological correlates of Vicinium in combination with durvalumab. This Phase 1 trial is open and actively recruiting patients.

Vicinium has also been evaluated as a locally-administered next generation ADC for the treatment of squamous cell carcinoma of the head and neck, or SCCHN. Vicinium, or VB4-845, for the treatment of SCCHN had been previously designated as Proxinium^TM to indicate its different fill volume and vial size for local administration via intratumoral injection. In our two Phase 1 clinical trials, 53% of evaluable subjects treated with Vicinium demonstrated antitumor activity with epithelial cell adhesion molecule, or EpCAM-expressing tumors as assessed by the investigators' clinical measurements, the investigators' overall assessment including qualitative changes, and assessment of available radiologic data. In addition, three out of the four subjects with complete responses of injected tumors had regression or complete resolution of adjacent non injected lesions. In a Phase 2 clinical trial, we observed tumor shrinkage in 10 of the 14 evaluable subjects (71.4%). We intend to initiate a Phase 1/2a clinical trial that will explore the potential of Vicinium in combination with a checkpoint inhibitor for the treatment of SCCHN and are actively seeking partners for a combination program. In addition to our locally-administered next generation ADCs, our pipeline also includes systemically-administered next generation ADCs in development. Our systemically-administered next generation ADCs are built around our proprietary de-immunized variant of the plant-derived cytotoxin bouganin, or deBouganin. Our lead systemically-administered product candidate, VB6-845d, is being developed for the treatment of multiple types of EpCAM-positive solid tumors. VB6-845d is administered by intravenous infusion. A Phase 1 clinical trial conducted with VB6-845, the prior version of VB6-845d, revealed no clinically relevant immune response to the deBouganin payload.

We have deferred further development of VB6-845d and of Vicinium for the treatment of SCCHN in order to focus our efforts and our resources on our ongoing development of Vicinium for the treatment of high-grade NMIBC. We are also exploring collaborations for Vicinium for the treatment of SCCHN and VB6-845d, and plan on submitting an Investigational New Drug application, or IND, with VB6-845d once funding or a partner is secured for this program.

Table of Contents

We maintain global development, marketing and commercialization rights for all of our next generation ADC-based product candidates. We intend to explore various commercialization strategies to market our approved products. If we obtain regulatory approval for Vicinium for the treatment of high-grade NMIBC, we may build a North American specialty urology sales force to market the product or seek commercialization partners. If we obtain regulatory approval for Vicinium for the treatment of SCCHN or for our other product candidates, including VB6-845d, we may seek partners with oncology expertise in order to maximize the commercial value of each asset or a portfolio of assets. We also own or exclusively license worldwide intellectual property rights for all of our next generation ADC-based product candidates, covering our key patents with protection ranging from 2018 to 2036.

Our operations to date have been limited to organizing and staffing our company, acquiring rights to intellectual property, business planning, raising capital, developing our technology, identifying potential product candidates, undertaking pre-clinical studies and conducting clinical trials. To date, we have financed our operations primarily through debt and equity offerings and collaboration and licensing arrangements. We have devoted substantially all of our financial resources and efforts to research and development activities. We have not completed development of any of our product candidates. We expect to continue to incur significant expenses and operating losses over the next several years. Our net losses may fluctuate significantly from quarter-to-quarter and year-to-year.

License Agreement with Roche and Other Product Candidates

On June 10, 2016, we entered into a License Agreement, which we refer to as the License Agreement, with F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc., or collectively, Roche, pursuant to which we licensed our monoclonal antibody EBI-031 and all other IL-6 antagonist antibody technology owned by us. Under the License Agreement, Roche is required to continue developing EBI-031 at its cost. At the time of the License Agreement, EBI-031, which was derived using our previous AMP-Rx platform, was in pre-clinical development as an intravitreal injection for diabetic macular edema and uveitis. We have received $30.0 million in payments from Roche pursuant to the License Agreement, including a $7.5 million upfront payment and a $22.5 million milestone payment as a result of the IND application for EBI-031 becoming effective. We are also entitled to receive up to an additional $240.0 million upon the achievement of other specified regulatory, development and commercial milestones, as well as royalties based on net sales of potential future products containing EBI-031 or any other potential future products containing other IL-6 compounds.

Liquidity

Since inception, we have incurred significant operating losses and expect to continue to incur operating losses for the foreseeable future. We had a net loss of $4.0 million for the three months ended March 31, 2018. As of March 31, 2018, we had an accumulated deficit of $156.3 million.

On March 23, 2018, we raised approximately $9.0 million of net proceeds from the sale of 7,968,128 shares of our common stock in a registered direct offering and the sale of common stock purchase warrants to purchase 7,968,128 shares of common stock at a price of $0.125 for each warrant to purchase one share of our common stock in a concurrent private placement. We refer to the registered direct offering and concurrent private placement as the “March 2018 Financing.” Subject to certain ownership limitations, the common stock purchase warrants issued in the March 2018 Financing were exercisable immediately upon issuance at an exercise price equal to $1.20 per share of common stock, subject to adjustments as provided under the terms of such common stock purchase warrants. The common stock purchase warrants are exercisable for five years from March 23, 2018.

In addition, from April 1, 2018 through May 10, 2018, we received approximately $4.2 million in proceeds from the issuance of 5.2 million shares of common stock due to the exercise of common stock purchase warrants issued in connection with our underwritten public offering completed in November 2017, or the November 2017 Financing.

We do not know when, or if, we will generate any revenue from the sale of our product candidates as we seek regulatory approval for, and potentially begin to commercialize, any of our product candidates. We anticipate that we will continue to incur losses for the next several years and we expect the losses to increase as we continue the development of, and seek regulatory approvals for, our product candidates, and begin to commercialize any approved products. We are subject to all of the risks common to the development of new products and we may encounter unforeseen expenses, difficulties, complications, delays and other unknown factors that may adversely affect our business. Until we can generate substantial revenue from commercial sales, if ever, we expect to seek additional capital through a combination of private and public equity offerings, debt financings, strategic collaborations and alliances and licensing arrangements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interests of existing shareholders will be diluted and the terms may include liquidation or other preferences that adversely affect the rights of existing shareholders. Debt financing, if

Table of Contents

available, may involve agreements that include liens or other restrictive covenants limiting our ability to take important actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise additional funds through strategic collaborations and alliances or licensing arrangements with third parties we may have to relinquish valuable rights to our technologies or grant licenses on terms that are not favorable to us. If we are unable to raise additional funds when needed we may be required to further delay, limit, reduce or terminate our development or commercialization efforts or grant rights to develop and market our technologies that we would otherwise prefer to develop and market ourselves.

Table of Contents

Our future capital requirements will depend on many factors, including:


•	the scope, initiation, progress, timing, costs and results of pre-clinical development and laboratory testing and clinical trials for our product candidates;


•	our ability to establish collaborations on favorable terms, if at all, particularly manufacturing, marketing and distribution arrangements for our product candidates;


•	the costs and timing of the implementation of commercial-scale manufacturing activities;


•	the costs and timing of establishing sales, marketing and distribution capabilities for any product candidates for which we may receive regulatory approval;


•	the costs and timing of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending any intellectual property-related claims;


•	our obligation to make milestone, royalty and other payments to third party licensors under our licensing agreements;


•	the extent to which we in-license or acquire rights to other products, product candidates or technologies;


•	the outcome, timing and cost of regulatory review by the FDA and comparable foreign regulatory authorities, including the potential for the FDA or comparable foreign regulatory authorities, including Health Canada, to require that we perform more studies or clinical trials than those that we currently expect;


•	our ability to achieve certain future regulatory, development and commercialization milestones under the License Agreement with Roche;


•	the effect of competing technological and market developments; and


•	the revenue, if any, received from commercial sales of any product candidates for which we receive regulatory approval.

Accordingly, until such time that we can generate substantial revenue from product sales, if ever, we expect to finance our operations through public or private equity or debt financings, collaboration or licensing arrangements, or other sources. However, we may be unable to raise additional funds or enter into such arrangements when needed on favorable terms, or at all, which would have a negative impact on our financial condition and could force us to delay, limit, reduce or terminate our development programs or commercialization efforts or grant to others rights to develop or market product candidates that we would otherwise prefer to develop and market ourselves. Failure to receive additional funding could cause us to cease operations, in part or in full. Furthermore, even if we believe we have sufficient funds for our current or future operating plans, we may seek additional capital due to favorable market conditions or strategic considerations.

We believe that our cash and cash equivalents of $19.7 million as of March 31, 2018, together with the approximate $4.2 million of net proceeds received from the issuance of 5.2 million shares of common stock due to the exercise of common stock purchase warrants between April 1, 2018 and May 10, 2018, will be sufficient to fund our current operating plan into early 2019, however, we have based this estimate on assumptions that may prove to be wrong, and we could use our capital resources sooner than we currently expect.

Financial Operations Overview

Revenue

To date, we have not generated any revenue from the sale of products. Substantially all of our revenue to date has been derived from the License Agreement with Roche and, to a lesser extent, from our former collaboration with ThromboGenics N.V., or ThromboGenics. We do not expect to generate significant product revenue unless and until we obtain marketing approval for and commercialize our product candidates.

Table of Contents

Research and Development Expenses

Research and development expenses consist primarily of costs incurred for the development of our product candidates, which include:


•	employee-related expenses, including salaries, benefits, travel and stock-based compensation expense;


•	expenses incurred under agreements with contract research organizations, or CROs, and investigative sites that conduct our clinical trials;


•	expenses associated with developing manufacturing capabilities and manufacturing clinical study materials;


•	facilities, depreciation, and other expenses, which include direct and allocated expenses for rent and maintenance of facilities, insurance, and other supplies; and


•	expenses associated with pre-clinical and regulatory activities.

We expense research and development costs as incurred. We recognize external development costs based on an evaluation of the progress to completion of specific tasks using information and data provided to us by our vendors and our clinical sites.

The successful development and commercialization of any product candidate is highly uncertain. This is due to the numerous risks and uncertainties associated with product development and commercialization, including the uncertainty of:


•	the scope, progress, outcome and costs of our clinical trials and other research and development activities;


•	the efficacy and potential advantages of our product candidates compared to alternative treatments, including any standard of care;


•	the market acceptance of our product candidates;


•	the cost and timing of the implementation of commercial-scale manufacturing of our product candidates;


•	obtaining, maintaining, defending and enforcing patent claims and other intellectual property rights;

Table of Contents


•	significant and changing government regulation; and


•	the timing, receipt and terms of any marketing approvals.

A change in the outcome of any of these variables with respect to the development of any product candidate could mean a significant change in the costs and timing associated with the development of that product candidate. For example, if the FDA or another regulatory authority were to require us to conduct clinical trials or other testing beyond those that we currently contemplate will be required for the completion of clinical development of any product candidate, we could be required to expend significant additional financial resources and time on the completion of clinical development of that product candidate.

We allocate direct research and development expenses, consisting principally of external costs, such as fees paid to investigators, consultants, central laboratories and CROs in connection with our clinical trials, and costs related to manufacturing or purchasing clinical trial materials, to specific product programs. We do not allocate employee and contractor-related costs, costs associated with our platform and facility expenses, including depreciation or other indirect costs, to specific product programs because these costs may be deployed across multiple product programs under research and development and, as such, are separately classified. The table below provides research and development expenses incurred for Vicinium for the treatment of high-grade NMIBC, Vicinium for the treatment of SCCHN, and VB6-845d product programs and other expenses by category. We have deferred further development of Vicinium for the treatment of SCCHN and VB6-845d in order to focus our efforts and our resources on our ongoing development of Vicinium for the treatment of NMIBC. Since our acquisition of Viventia, our research and development expenses have been related primarily to the development of Vicinium for the treatment of high-grade NMIBC. We expect our research and development expenses for Vicinium for the treatment of NMIBC will continue to increase during subsequent periods. We did not allocate research and development expenses to any other specific product program during the periods presented:



	Three Months Ended March 31,
	2018		2017
	(in thousands)
Programs:
Vicinium, for the treatment of high-grade NMIBC (1)	$	1,922	$	1,519
Vicinium, for the treatment of SCCHN (2)	—		27
VB6-845d (2)	—		72
Total direct program expenses	1,922		1,618
Personnel and other expenses:
Employee and contractor-related expenses	965		855
Platform-related lab expenses	63		127
Facility expenses	95		91
Other expenses	210		183
Total personnel and other expenses	1,333		1,256
Total research and development expenses	$	3,255	$	2,874

(1) We expect our development activities for Vicinium for the treatment of high-grade NMIBC will increase significantly during subsequent periods.

(2) We have deferred further development of Vicinium for the treatment of SCCHN and of VB6-845d in order to focus our efforts and our resources on our ongoing development of Vicinium for the treatment of high-grade NMIBC.

General and Administrative Expenses

General and administrative expenses consist primarily of salaries and related costs for personnel, including stock-based compensation, in executive, operational, finance, business development and human resource functions. Other general and administrative expenses include facility-related costs and professional fees for legal, patent, consulting and accounting services.

Changes in Fair Value of Contingent Consideration

In connection with the Acquisition, we recorded contingent consideration pertaining to the amounts potentially payable to Viventia's shareholders pursuant to the terms of the share purchase agreement. The fair value of contingent consideration is

Table of Contents

assessed at each balance sheet date and changes, if any, to the fair value are recognized within the condensed consolidated statements of operations and comprehensive income (loss).

Other Income (Expense), Net

Other income (expense), net consists primarily of interest income earned on cash and cash equivalents.

Critical Accounting Policies and Significant Judgments and Estimates

Our critical accounting policies are those policies which require the most significant judgments and estimates in the preparation of our condensed consolidated financial statements. Management has determined that our most critical accounting policies are those relating to revenue recognition, accrued research and development expenses, stock-based compensation, fair value of warrants to purchase common stock, fair value of intangible assets and goodwill, income taxes including the valuation allowance for deferred tax assets, contingent consideration and going concern considerations.

Recently adopted accounting standards

In May 2014, the FASB issued ASU No. 2014-09, codified as ASC-606, Revenue from Contracts with Customers, or ASC-606, which supersedes all existing revenue recognition requirements, including most industry-specific guidance. The new standard requires a company to recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. The new standard was effective on January 1, 2018 and we adopted this standard using the modified retrospective approach. All of the revenue generated in the three months ended March 31, 2017 is from our license arrangement with Roche. We did not record any revenue for the three months ended March 31, 2018. We evaluated variable consideration, and in particular, milestone payments from Roche to assess the timing of when to include them in the transaction price. This assessment did not result in earlier revenue recognition under ASC 606 compared to the current guidance and did not result in any revenue being recorded for the three months ended March 31, 2018. As such, the adoption of ASC 606 did not have material impact on its financial position and results of operations or cash flows.

In May 2017, the FASB issued ASU No. 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting, or ASU 2017-09. This update clarifies the changes to terms or conditions of a share-based payment award that require an entity to apply modification accounting. ASU 2017-09 is effective as of January 1, 2018. The adoption of this guidance did not have a significant impact on our financial position, results of operations or cash flows.

In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. ASU 2016-18 requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash or restricted cash equivalents. Amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 was effective for annual and interim periods beginning after December 15, 2017, with early adoption permitted. We adopted this standard effective January 1, 2018. Upon adoption of ASU 2016-18, we applied the retrospective transition method for each period presented and included $10,000 of restricted cash in the beginning-of-period and end-of-period cash, cash equivalents and restricted cash balance reflected in the condensed consolidated statement of cash flows for the three months ended March 31, 2017. A reconciliation of cash, cash equivalents and restricted cash for each period presented is provided in note 10 to the condensed consolidated financial statements.

Recently issued accounting pronouncements

In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842) ("ASU 2016-02"). ASU

2016-02 addresses the financial reporting of leasing transactions. Under current guidance for lessees, leases are only included

on the balance sheet if certain criteria, classifying the agreement as a capital lease, are met. This update will require the

recognition of a right-of-use asset and a corresponding lease liability, discounted to the present value, for all leases that extend

Table of Contents

liability will be recognized separately from the amortization of the right-of-use asset in the statement of operations and the repayment of the principal portion of the lease liability will be classified as a financing activity while the interest component will be included in the operating section of the statement of cash flows. This guidance is effective for annual and interim reporting periods beginning after December 15, 2018. Early adoption is permitted. The Company has not yet completed the analysis of how adopting this guidance will affect its consolidated financial statements.

There have been no significant changes to our critical accounting policies discussed in our Annual Report on Form 10-K for the year ended December 31, 2017, which we refer to as our 2017 Form 10-K, other than the adoption of ASC 606.

Results of Operations

Comparison of the Three Months Ended March 31, 2018 and 2017



	Three Months Ended March 31,
	2018			2017			Change
	(in thousands)
Revenue:
Collaboration revenue	$	—		$	—		$	—
License revenue	—			425			(425		)
Total revenue	—			425			(425		)
Operating expenses:
Research and development	3,255			2,874			381
General and administrative	1,952			2,213			(261		)
(Gain) Loss from change in fair value of contingent consideration	(1,200		)	1,500			(2,700		)
Total operating expenses	4,007			6,587			(2,580		)
(Loss) income from operations	(4,007		)	(6,162		)	2,155
Other income (expense), net	44			101			(57		)
Net (loss) income and comprehensive (loss) income	$	(3,963	)	$	(6,061	)	$	2,098

Revenue. We recorded no revenue for the three months ended March 31, 2018 compared to $0.4 million for the three months ended March 31, 2017. The decrease was due to a decrease in license revenue recognized pursuant to our License Agreement with Roche.

Research and development expenses. Research and development expenses were $3.3 million for the three months ended March 31, 2018 compared to $2.9 million for the three months ended March 31, 2017. The increase of $0.4 million was due primarily to increases in Vicinium for the treatment of high-grade NMIBC related development expenses of $0.4 million and increases in stock-based compensation of $0.2 million, offset by decreases of $0.2 million in pre-clinical and manufacturing expenses.

General and administrative expenses. General and administrative expenses were $2.0 million for the three months ended March 31, 2018 compared to $2.2 million for the three months ended March 31, 2017. The decrease of $0.3 million was due primarily to a decrease in legal and professional fees.

(Gain) Loss from change in fair value of contingent consideration. The change in fair value of contingent consideration was a $(1.2) million gain for the three months ended March 31, 2018 compared to a $1.5 million loss for the three months ended March 31, 2017. The change of $(2.7) million was due primarily to changes in the discount rates.

Other income (expense), net. Other income, net was $44,000 for the three months ended March 31, 2018 compared to other expense, net of $101,000 for the three months ended March 31, 2017. The change of $(57,000) was due primarily to the decrease in proceeds from sales of equipment.

Liquidity and Capital Resources

Sources of Liquidity

Table of Contents

Since inception, we have incurred significant operating losses and expect to continue to incur operating losses for the foreseeable future. To date, we have financed our operations primarily through debt and equity offerings and collaboration and licensing arrangements.

In June 2016, we entered into the License Agreement with Roche and received an up-front license fee of $7.5 million and up to an additional $262.5 million upon the achievement of specified regulatory, development and commercial milestones with respect to up to two unrelated indications. Specifically, an aggregate amount of up to $197.5 million is payable to us for the achievement of specified milestones with respect to the first indication: consisting of $72.5 million in development milestones, $50.0 million in regulatory milestones and $75.0 million in commercialization milestones. We received the first development milestone payment of $22.5 million as a result of the IND for EBI-031 becoming effective. In addition, we are entitled to receive royalty payments in accordance with a tiered royalty rate scale, with rates ranging from 7.5% to 15% for net sales of potential future products containing EBI-031 and at up to 50% of these rates for net sales of potential future products containing other IL-6 compounds, with each of the royalties subject to reduction under certain circumstances and to the buy-out options of Roche.

On March 23, 2018, we raised approximately $9.0 million of net proceeds from the sale of 7,968,128 shares of our common stock in a registered direct offering and the sale of common stock purchase warrants to purchase 7,968,128 shares of common stock at a price of $0.125 for each warrant to purchase one share of our common stock in a concurrent private placement. Subject to certain ownership limitations, the common stock purchase warrants issued in the March 2018 Financing were exercisable immediately upon issuance at an exercise price equal to $1.20 per share of common stock, subject to adjustments as provided under the terms of such common stock purchase warrants. The common stock purchase warrants are exercisable for five years from March 23, 2018.

Between April 1, 2018 and May 10, 2018, we received approximately $4.2 million in proceeds from the issuance of 5.2 million shares of common stock due to the exercise of common stock purchase warrants issued in connection with the November 2017 Financing.

Cash Flows

As of March 31, 2018, we had cash and cash equivalents of $19.7 million. Cash in excess of immediate requirements is invested in accordance with our investment policy, primarily with a view to liquidity and capital preservation.

The following table sets forth the primary sources and uses of cash for each of the periods set forth below:



	Three Months Ended March 31,
	2018			2017
	(in thousands)
Net cash (used in) provided by :
Operating activities	$	(4,383	)	$	(5,195	)
Investing activities	5			76
Financing activities	9,386			45
Net decrease in cash and cash equivalents	$	5,008		$	(5,074	)

Operating activities. Net cash used in operating activities was $4.4 million for the three months ended March 31, 2018 and consisted primarily of net loss of $4.0 million, adjusted for non-cash items, including stock-based compensation expense of $0.4 million, a change in fair value of contingent consideration of $1.2 million, and a net change in operating assets and liabilities of $0.3 million.

Net cash provided by operating activities was $5.2 million for the three months ended March 31, 2017, and consisted primarily of net income of $6.1 million resulting from the License Agreement with Roche, adjusted for non-cash items, including stock-based compensation expense of $0.2 million, depreciation expense of $0.1 million, change in fair value of contingent consideration of $1.5 million, gain on sale of property and equipment of $(0.1) million and a net change in operating assets and liabilities of $(0.9) million.

Investing activities. Net cash provided by investing activities consisted of sales of property and equipment. We had cash proceeds from the sale of property and equipment of approximately $5,000 and $76,000 for the three months ended March 31, 2018 and 2017, respectively.

Table of Contents

Financing activities. Net cash provided by financing activities for the three months ended March 31, 2018 consisted of the proceeds from the cash exercise of common stock purchase warrants issued in connection with our November 2017 Financing, as well as the sale of 7,968,128 shares of our common stock and common stock purchase warrants to purchase 7,968,128 shares of our common stock in the March 2018 Financing.

Funding Requirements

We will incur substantial expenses if and as we:


•	continue our Phase 3 clinical trial for Vicinium for the treatment of high-grade NMIBC;


•	incur research and pre-clinical and clinical development of our other product candidates;


•	seek to discover and develop additional product candidates;


•	in-license or acquire the rights to other products, product candidates or technologies;


•	seek marketing approvals for any product candidates that successfully complete clinical trials;


•	establish sales, marketing and distribution capabilities and scale up and validate external manufacturing capabilities to commercialize any products for which we may obtain marketing approval;


•	maintain, expand and protect our intellectual property portfolio;


•	add equipment and physical infrastructure to support our research and development;


•	hire additional clinical, quality control, scientific and management personnel; and


•	expand our operational, financial and management systems and personnel.

We believe that our cash and cash equivalents of $19.7 million as of March 31, 2018, together with the $4.2 million of proceeds received from April 1, 2018 through May 10, 2018 from the issuance of 5.2 million shares of common stock due to the exercise of common stock purchase warrants issued in the November 2017 Financing, will be sufficient to fund our current operating plan into early 2019; however, we have based this estimate on assumptions that may prove to be wrong, and we could use our capital resources sooner than we currently expect.

Our future capital requirements will depend on many factors, including:


•	the scope, initiation, progress, timing, costs and results of pre-clinical development and laboratory testing of our pre-clinical product candidates;


•	our ability to establish collaborations on favorable terms, if at all, particularly manufacturing, marketing and distribution arrangements for our product candidates;


•	the costs and timing of the implementation of commercial-scale manufacturing activities;


•	the costs and timing of establishing sales, marketing and distribution capabilities for any product candidates for which we may receive regulatory approval;


•	the costs and timing of preparing, filing and prosecuting patent applications, maintaining and enforcing our intellectual property rights and defending any intellectual property-related claims;


•	our obligation to make milestone, royalty and other payments to third party licensors under our licensing agreements;


•	the extent to which we in-license or acquire rights to other products, product candidates or technologies;


•	the outcome, timing and cost of regulatory review by the FDA and comparable foreign regulatory authorities, including the potential for the FDA or comparable foreign regulatory authorities, including Health Canada, to require that we perform more studies than those that we currently expect;


•	our ability to achieve certain future regulatory, development and commercialization milestones under the License Agreement with Roche;


•	the effect of competing technological and market developments; and


•	the revenue, if any, received from commercial sales of any product candidates for which we receive regulatory approval.

Table of Contents

Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a combination of equity offerings, debt financings, government or other third-party funding, collaborations, strategic alliances, licensing arrangements and marketing and distribution arrangements. We do not have any committed external source of funds other than the amounts payable under the License Agreement with Roche. To the extent that we raise additional capital through the sale of equity or debt securities, such as the financings we completed in November 2017 and March 2018, our stockholders' ownership interest will be diluted and the terms of these securities may include liquidation or other preferences that adversely affect our stockholders’ rights as holders of our common stock. Debt financing and equity financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise additional funds through government or other third-party funding, collaborations, strategic alliances, licensing arrangements or marketing and distribution arrangements, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization efforts or grant rights to develop and market products or product candidates that we would otherwise prefer to develop and market ourselves.

Contractual Obligations and Commitments

The disclosure of our contractual obligations and commitments is set forth under the heading “Management’s Discussion and Analysis of Financial Condition and Results of Operations — Contractual Obligations and Commitments” in our 2017 Form 10-K.

During the three months ended March 31, 2018, there were no material changes from the contractual commitments and obligations previously disclosed in our 2017 Form 10-K.

License Agreements

The disclosure of our obligations under our license agreements is set forth under the heading “Management’s Discussion and Analysis of Financial Condition and Results of Operations — License Agreements” in our 2017 Form 10-K.

During the three months ended March 31, 2018, there were no material changes to our obligations under our license agreements previously disclosed in our 2017 Form 10-K.

Off-balance Sheet Arrangements

We did not have during the periods presented, and we do not currently have, any off-balance sheet arrangements, as defined in the rules and regulations of the Securities and Exchange Commission, or SEC.

Table of Contents

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

Interest Rate Risk

We are exposed to market risk related to changes in interest rates. As of March 31, 2018, we had cash and cash equivalents of $19.7 million, primarily money market mutual funds consisting of U.S. government-backed securities. Our primary exposure to market risk is interest rate sensitivity, which is affected by changes in the general level of U.S. interest rates, particularly because our investments are in short-term securities. Due to the short-term duration of our investment portfolio and the low risk profile of our investments, an immediate 100 basis point (1.0%) change in interest rates would not have a material effect on the fair market value of our portfolio.

Foreign Currency Risk

As our functional currency is in U.S. Dollars, we face foreign exchange rate risk as a result of entering into transactions denominated in Canadian dollars. As a result, our primary foreign currency exposure is to fluctuations in the Canadian dollar relative to the U.S. dollar. A hypothetical 10% change in average foreign currency exchange rates during any of the preceding periods presented would not have a material effect on our net loss. Foreign exchange rates may continue to be a factor in the future periods as we continue to expand and grow our business.

Item 4. Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of March 31, 2018. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e)) under Securities Exchange Act of 1934, as amended, or the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time period specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of March 31, 2018, our Chief Executive Officer and Chief Financial Officer concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.

Notwithstanding our assessment that, as noted below, our internal control over financial reporting was not effective as of December 31, 2017 related to accounting for business combinations, our management concluded that our disclosure controls and procedures were effective at the reasonable assurance level. The material weakness in our internal control over financial reporting was attributable primarily to our lack of expertise in our finance and accounting group related to the accounting for business combinations.

As more fully discussed in our 2017 Annual Report on Form 10-K, to remediate the material weakness referenced above, we have implemented or have plans to implement the remediation initiatives described in Part II, Item 9A of our 2017 Annual Report on Form 10-K and will continue to evaluate the remediation and plan to implement additional measures in the future.

Previously Identified Material Weakness

Our management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. Our internal control system was designed to provide reasonable assurance to our management and our board of directors regarding the preparation and fair presentation of published financial statements. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2017. In making this assessment, our management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway

Table of Contents

Commission in Internal Control-Integrated Framework (2013). Based on this evaluation, our management concluded that our internal control over financial reporting was not effective as of December 31, 2017.

As of December 31, 2017 there was a material weakness in our controls over the financial reporting process related to business combinations. As a result of a lack of expertise in our finance and accounting group related to the accounting for business combinations, we lacked sufficient review of assumptions used and conclusions reached from the perspective of a typical market participant used in the acquisition valuation model. As a result, our management concluded that our internal control over financial reporting was not effective as of December 31, 2017.

Remediation Status

As more fully discussed in our 2017 Annual Report on Form 10-K, to remediate the material weaknesses referenced above, we have implemented or have plans to implement the remediation initiatives described in Part II, Item 9A of our 2017 Annual Report on Form 10-K and will continue to evaluate the remediation and plan to implement additional measures in the future. Effective as of October 20, 2017, John McCabe resigned as our Chief Financial Officer and Richard Fitzgerald was appointed as our Interim Chief Financial Officer and on January 23, 2018, Mr. Fitzgerald was appointed as our Chief Financial Officer. In order to stabilize our remediation efforts in light of this transition, we also retained consultants to assist with the review of assumptions used and conclusions reached from the perspective of a typical market participant used in the acquisition valuation model for the final purchase price allocation. In connection with our remediation plan, in early 2018 we added an employee to our financial and accounting group and may add additional employees during 2018 to broaden capacity. We also continue to engage independent consultants to aid in the review of our financial reporting process and continue to evaluate steps to address the material weakness.

Changes in Internal Control Over Financial Reporting

During the three months ended March 31, 2018, management continued to implement certain remediation initiatives discussed in Part II, Item 9A of our 2017 Annual Report on Form 10-K. However, there were no material changes to our internal control over financial reporting during the period covered by this Quarterly Report on Form 10-Q that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Table of Contents

PART II—OTHER INFORMATION

Item 1. Legal Proceedings

We are not currently subject to any material legal proceedings.


Item 1A.	Risk Factors

There have been no material changes to the risk factors previously disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2017.

Table of Contents

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Other than as previously disclosed on our Current Reports on Form 8-K filed with the SEC, we did not issue any unregistered equity securities during the three months ended March 31, 2018.

Item 3. Defaults Upon Senior Securities.

Not applicable.

Item 4. Mine Safety Disclosures.

Not applicable.

Item 5. Other Information.

Not applicable.

Item 6. Exhibits

The exhibits filed as part of this Quarterly Report on Form 10-Q are set forth on the Exhibit Index, which Exhibit Index is incorporated herein by reference.

Table of Contents

EXHIBIT INDEX



Exhibit No.		Description
4.1		Form of Warrant. Incorporated by reference to Exhibit 4.1 to our Current Report on Form 8-K filed with the SEC on March 23, 2018 (File. No. 001-36296).
10.1		Employment Agreement, dated January 23, 2018, by and between Eleven Biotherapeutics, Inc. and Richard Fitzgerald. Incorporated herein by reference to Exhibit 10.1 to our Current Report on Form 8-K filed with the SEC on January 25, 2018 (File No. 001-36296).
10.2		Form of Securities Purchase Agreement. Incorporated by reference to Exhibit 10.1 to our Current Report on Form 8-K filed with the SEC on March 23, 2018 (File. No. 001-36296).
31.1*		Rule 13a-14(a) Certification of Principal Executive Officer
31.2*		Rule 13a-14(a) Certification of Principal Financial Officer
32.1*		Certification of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. §1350
101.INS*		XBRL Instance Document
101.SCH*		XBRL Taxonomy Extension Schema Document
101.CAL*		XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*		XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*		XBRL Taxonomy Extension Label Linkbase Document
101.PRE*		XBRL Taxonomy Extension Presentation Linkbase Document



*	Filed herewith.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.



ELEVEN BIOTHERAPEUTICS, INC.

By:		/s/ Stephen A. Hurly
		Stephen A. Hurly
		President and Chief Executive Officer
		(Principal Executive Officer and Duly Authorized Officer)

May 15, 2018

Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2018	May 10, 2018
Document And Entity Information [Abstract]
Trading Symbol	EBIO
Entity Registrant Name	Eleven Biotherapeutics, Inc.
Entity Central Index Key	0001485003
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		48,390,072

CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred stock, par value (in USD per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	43,105,466	34,702,565
Common stock, shares outstanding (in shares)	43,105,466	34,702,565

Organization and Basis of Presentation	3 Months Ended
Organization and Basis of Presentation	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation Eleven Biotherapeutics, Inc. (the “Company”), a Delaware corporation, is a biologics oncology company focused primarily on designing, engineering and developing targeted next generation antibody drug conjugates ("ADC"s). The Company's next generation ADCs are single protein therapeutics composed of targeting moieties genetically fused via linker domains to cytotoxic protein payloads that are produced through the Company's proprietary one-step manufacturing process. The Company targets tumor cell surface antigens that allow for rapid internalization into the targeted cancer cell while also having limited expression on normal cells. The Company has designed its next generation ADCs to overcome the fundamental efficacy and safety challenges inherent in existing ADCs, where a payload is chemically attached to a targeting antibody. Basis of presentation The condensed consolidated financial statements as of March 31, 2018 and December 31, 2017 and for the three months ended March 31, 2018 and 2017 and the related information contained within the notes to the condensed consolidated financial statements are unaudited. The unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting standards applicable to interim financial statements and, in the opinion of management, reflect all adjustments, which include only normal recurring adjustments, necessary to present fairly the Company’s consolidated financial position as of March 31, 2018 and its results of operations and its cash flows for the three months ended March 31, 2018 and 2017. The financial data and the other financial information disclosed in these notes to the condensed consolidated financial statements related to the three-month periods are also unaudited. The results of operations for the three months ended March 31, 2018 are not necessarily indicative of the results to be expected for the year ending December 31, 2018 or for any other future annual or interim period. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 that was filed with the Securities and Exchange Commission (“SEC”) on April 2, 2018 (the "2017 Form 10-K"). The condensed consolidated financial statements include the accounts of Eleven Biotherapeutics, Inc., its wholly owned subsidiary, Viventia Bio Inc. ("Viventia"), and its indirect subsidiaries, Viventia Bio USA Inc. and Viventia Biotech (EU) Limited. All inter-company transactions and balances have been eliminated in consolidation. The condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles. The functional currency of Viventia Bio Inc., Viventia Bio USA Inc. and Viventia Biotech (EU) Limited is the U.S. dollar. Liquidity The Company has financed its operations to date primarily through debt and equity offerings and collaboration and licensing arrangements. As of March 31, 2018, the Company had cash and cash equivalents totaling $19.7 million, net working capital of $15.1 million and an accumulated deficit of $156.3 million. On March 23, 2018, the Company raised approximately $9.0 million of net proceeds from the sale of 7,968,128 shares of common stock at a price of $1.13 per share in a registered direct offering and the sale of common stock purchase warrants to purchase 7,968,128 shares of common stock at a price of $0.125 for each warrant to purchase one share of common stock in a concurrent private placement (collectively, the “March 2018 Financing”). Subject to certain ownership limitations, the common stock purchase warrants issued in the March 2018 Financing were exercisable immediately upon issuance at an exercise price equal to $1.20 per share of common stock, subject to adjustments as provided under the terms of such common stock purchase warrants. The common stock purchase warrants are exercisable for five years from March 23, 2018. In addition, between April 1, 2018 and May 10, 2018, the Company received proceeds of $4.2 million from the issuance of 5.2 million shares of common stock due to the exercise of common stock purchase warrants issued in connection with its underwritten public offering in November 2017 ("November 2017 Financing"). Management must evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date that the financial statements are issued. This evaluation initially does not take into consideration the potential mitigating effect of management’s plans that have not been fully implemented as of the date the financial statements are issued. When substantial doubt exists, management evaluates whether the mitigating effect of its plans sufficiently alleviates substantial doubt about the Company’s ability to continue as a going concern. The mitigating effect of management’s plans, however, is only considered if both (1) it is probable that the plans will be effectively implemented within one year after the date that the financial statements are issued, and (2) it is probable that the plans, when implemented, will mitigate the relevant conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date that the financial statements are issued. Generally, to be considered probable of being effectively implemented, the plans must have been approved by the Company’s board of directors ("Board") before the date that the financial statements are issued. The future success of the Company is dependent on its ability to develop its product candidates and ultimately upon its ability to attain profitable operations. The Company is subject to a number of risks similar to other early-stage life science companies, including, but not limited to, successful discovery and development of its product candidates, raising additional capital with favorable terms, development by its competitors of new technological innovations, protection of proprietary technology and market acceptance of the Company’s products. The successful discovery and development of product candidates requires substantial working capital which may not be available to the Company on favorable terms or not at all. To date, the Company has no revenue from product sales and management expects continuing operating losses in the future. As of March 31, 2018, the Company had available cash and cash equivalents of $19.7 million, which it believes, together with the additional $4.2 million of proceeds received between April 1, 2018 and May 10, 2018 from the issuance of 5.2 million shares of common stock due to the exercise of common stock purchase warrants issued in the November 2017 Financing, is not sufficient to fund the Company’s current operating plan for twelve months from the date of issuance of these financial statements. Management expects to seek additional funds through equity or debt financings or through additional collaboration, licensing transactions or other sources. The Company may be unable to obtain equity or debt financings or enter into additional collaboration or licensing transactions and, if necessary, the Company will be required to implement cost reduction strategies. These factors raise substantial doubt about the Company’s ability to continue as a going concern. The accompanying condensed consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and satisfaction of liabilities in the ordinary course of business. The condensed consolidated financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of this uncertainty.

Significant Accounting Policies and Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Significant Accounting Policies and Recent Accounting Pronouncements	Significant Accounting Policies and Recent Accounting Pronouncements Recently adopted accounting standards In May 2014, the FASB issued ASU No. 2014-09, codified as Accounting Standards Codification ("ASC") 606, Revenue from Contracts with Customers ("ASC 606"), which supersedes all existing revenue recognition requirements, including most industry-specific guidance. The new standard requires a company to recognize revenue when it transfers goods or services to customers in an amount that reflects the consideration that the company expects to receive for those goods or services. The new standard was effective on January 1, 2018 and the Company adopted this standard using the modified retrospective approach. As a result of this adoption, no amounts were recorded as a cumulative effect adjustment to accumulated deficit as of January 1, 2018. In May 2017, the FASB issued ASU No. 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting ("ASU 2017-09"). This update clarifies the changes to terms or conditions of a share-based payment award that require an entity to apply modification accounting. ASU 2017-09 is effective as of January 1, 2018. The adoption of this guidance did not have an impact on the Company's financial position, results of operations or cash flows. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. ASU 2016-18 requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents and amounts generally described as restricted cash or restricted cash equivalents. Amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 was effective for annual and interim periods beginning after December 15, 2017, with early adoption permitted. The Company adopted this standard effective January 1, 2018. Upon adoption of ASU 2016-18, the Company applied the retrospective transition method for each period presented and included $10,000 of restricted cash in the beginning-of-period and end-of-period cash, cash equivalents and restricted cash balance reflected in the condensed consolidated statement of cash flows for the three months ended March 31, 2017. A reconciliation of cash, cash equivalents and restricted cash for each period presented is provided in note 9 to the condensed consolidated financial statements. On December 22, 2017, the Tax Cuts and Jobs Act (the “Act”) was enacted in the United States. The Act reduces the U.S. federal corporate tax rate from 34% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred and creates new taxes on certain foreign sourced earnings. In December 2017, the SEC issued guidance under SAB No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act directing taxpayers to consider the impact of the U.S. legislation as “provisional” when it does not have the necessary information available, prepared or analyzed (including computations) in reasonable detail to complete its accounting for the change in tax law. As of March 31, 2018, the Company had not yet completed its accounting for all of the tax effects of the enactment of the Act. Recently issued accounting pronouncements In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842) ("ASU 2016-02"). ASU 2016-02 addresses the financial reporting of leasing transactions. Under current guidance for lessees, leases are only included on the balance sheet if certain criteria, classifying the agreement as a capital lease, are met. This update will require the recognition of a right-of-use asset and a corresponding lease liability, discounted to the present value, for all leases that extend beyond 12 months. For operating leases, the asset and liability will be expensed over the lease term on a straight-line basis, with all cash flows included in the operating section of the statement of cash flows. For finance leases, interest on the lease liability will be recognized separately from the amortization of the right-of-use asset in the statement of operations and the repayment of the principal portion of the lease liability will be classified as a financing activity while the interest component will be included in the operating section of the statement of cash flows. This guidance is effective for annual and interim reporting periods beginning after December 15, 2018. Early adoption is permitted. The Company has not yet completed the analysis of how adopting this guidance will affect its consolidated financial statements. Critical accounting policies There have been no material changes to the critical accounting polices recently disclosed in the 2017 Form 10-K other than the adoption of ASU 2014-09 and related updates which are codified as ASC 606. The Company enters into collaboration agreements with strategic partners for the development and commercialization of product candidates which are within the scope of ASC 606. Under these agreements, the Company license rights to certain of the Company’s product candidates and may complete other performance obligations, such as the deliver of drug product or research and development services. The terms of these arrangements typically include payment of non-refundable upfront fees, milestone payments, and royalties on net sales of licensed products and may also contain additional payment provisions. Under ASC 606, an entity recognizes revenue when its 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 the appropriate amount of revenue to be recognized for arrangements determined to be within the scope of ASC 606, the Company performs the following five steps: (i) identification of the promised goods or services in the contract, (ii) determination of whether the promised goods or services are performance obligations included whether they are distinct in the context of the contact, (iii) measurement of the transaction price, including the constraint on variable consideration, (iv) allocation of the transaction price to the performance obligations, and (v) recognition of revenue when the Company satisfies each performance obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect consideration it is entitled to in exchange for the goods or services it transfers to the customer. The Company estimates the transaction price based on the amount expected to be received for transferring the promised goods or services in the contract. The consideration may include fixed consideration or variable consideration. At the inception of each arrangement that includes variable consideration, the Company evaluates the amount of potential payments and the likelihood that the payments will be received. The Company utilizes either the most likely amount method or expected amount method to estimate the amount expected to be received based on which method best predicts the amount expected to be received. The amount of variable consideration which is included in the transaction price may be constrained, and is included in the transaction price only to the extent that it is probable that a significant reversal in the amount of the cumulative revenue recognized will not occur in a future period. The Company’s contracts include development and regulatory milestone payments which are assessed under the most likely amount method and constrained if it is probable that a significant revenue reversal would occur. At the end of each reporting period, the Company re-evaluates the probability of achievement of such milestones and any related constraint, and if necessary, adjusts its estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect revenue in the period of adjustment. For arrangements that include sales-based royalties, including milestone payments based on the level of sales, and the license is deemed to be the predominant item to which the royalties relate, the Company recognizes revenue at the later of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). To date, the Company has not recognized any consideration related to sales-based royalty revenue resulting from any of the Company’s collaboration arrangements. The Company allocates the transaction price based on the estimated stand-alone selling price of each of the performance obligations. The Company must develop assumptions that require judgment to determine the stand-alone selling price for each performance obligation identified in the contract. The consideration allocated to each performance obligation is recognized as revenue when control is transferred for the related goods or services.

License Agreement with Roche	3 Months Ended
License Agreement with Roche	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
License Agreement with Roche	License Agreement with Roche On June 10, 2016, the Company entered into the License Agreement with F. Hoffmann-La Roche and Hoffmann La-Roche Inc. (collectively, "Roche"), which became effective on August 16, 2016 (the "License Agreement"). Under the License Agreement, the Company granted Roche an exclusive, worldwide license, including the right to sublicense, to its patent rights and know-how related to the Company’s monoclonal antibody EBI-031 or any other IL-6 antagonist anti-IL-6 monoclonal antibody, to make, have made, use, have used, register, have registered, sell, have sold, offer for sale, import and export any product containing such an antibody or any companion diagnostic used to predict or monitor response to treatment with such a product (collectively, the “Licensed Intellectual Property”). During 2016, the Company received an upfront license fee of $7.5 million and a milestone payment of $22.5 million. The Company is entitled to receive up to $240.0 million in additional consideration upon the achievement of specified regulatory, development and commercial milestones. Specifically, an aggregate amount of up to $175.0 million is payable to the Company for the achievement of specified milestones with respect to the first indication: $50.0 million in development milestones, $50.0 million in regulatory milestones and $75.0 million in commercialization milestones. Additional amounts of up to $65.0 million are payable upon the achievement of specified development and regulatory milestones in a second indication. In addition, the Company is entitled to receive royalty payments in accordance with a tiered royalty rate scale, with rates ranging from 7.5% to 15% for net sales of potential future products containing EBI-031 and up to 50% of these rates for net sales of potential future products containing other IL-6 compounds, with each of the royalties subject to reduction under certain circumstances and to buy-out options. The License Agreement is subject to the provisions of ASC 606, which was adopted effective January 1, 2018 utilizing a modified retrospective method. The Company concluded that all performance obligations had been achieved as of the adoption date and therefore the full transaction price was considered earned. The transaction price was determined to be the $30.0 million received in 2016. Additional consideration to be paid to the Company upon the achievement of certain milestones will be included if it is expected that the amounts will be received and the amounts would not be subject to a constraint. As of the date of the adoption, no amounts were expected to be received from the achievement of any milestones due to the nature of the milestones and the development status of the product candidates at the time of the adoption. As a result, there were no amounts required to be recorded as a cumulative adoption adjustment as the consideration recognized under ASC 606 was consistent with the amounts recognized under the previous accounting literature. As of March 31, 2018, the Company concluded that there would be no adjustments to the transaction price as the Company continued to not expect any amounts to be received from any milestones within the License Agreement. This is due to the nature of the milestones and the development status of the product candidates at the time of the adoption. As a result, no revenue was recognized during the three-month period ended March 31, 2018 as all performance obligations had been previously achieved and there was no change in the transaction price during the period. No revenue would have been recognized under the previous accounting literature during the three month period ended March 31, 2018 as no milestones were achieved in the period, which was the revenue recognition criteria under the previous accounting literature.


1.	I have reviewed this Quarterly Report on Form 10-Q of Eleven Biotherapeutics, Inc.;


2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;


3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;


4.	The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:


a)	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;


b)	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;


c)	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and


d)	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and


a)	all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and


b)	any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.


(1)	the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and


(2)	the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 19,688	$ 14,680
Prepaid expenses and other current assets	638	301
Total current assets	20,326	14,981
Property and equipment, net	473	522
Restricted cash	10	10
Intangible assets	46,400	46,400
Goodwill	13,064	13,064
Other assets	19	120
Total assets	80,292	75,097
Current liabilities:
Accounts payable	1,393	907
Accrued expenses	3,853	3,813
Total current liabilities	5,246	4,720
Other liabilities	260	215
Deferred tax liability	12,528	12,528
Contingent consideration	38,400	39,600
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value per share; 5,000,000 shares authorized at March 31, 2018 and December 31, 2017 and no shares issued and outstanding at March 31, 2018 and December 31, 2017	0	0
Common stock, $0.001 par value per share; 200,000,000 shares authorized at March 31, 2018 and December 31, 2017 and 43,105,466 and 34,702,565 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	43	35
Additional paid-in capital	180,109	170,330
Accumulated deficit	(156,294)	(152,331)
Total stockholders’ equity	23,858	18,034
Total liabilities and stockholders’ equity	$ 80,292	$ 75,097

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
License revenue	$ 0	$ 425
Total revenue	0	425
Operating expenses:
Research and development	3,255	2,874
General and administrative	1,952	2,213
(Gain) Loss from change in fair value of contingent consideration	(1,200)	1,500
Total operating expenses	4,007	6,587
Loss from operations	(4,007)	(6,162)
Other income:
Other income, net	44	101
Total other income, net	44	101
Net loss and comprehensive loss	$ (3,963)	$ (6,061)
Net loss per share — basic and diluted (in dollars per share)	$ (0.11)	$ (0.25)
Weighted-average number of common shares used in net loss per share- basic and diluted (in shares)	35,674	24,610

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating activities
Net loss	$ (3,963)	$ (6,061)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	49	82
Stock-based compensation expense	401	244
Change in fair value of warrant liability	0	(3)
(Gain) Loss from change in fair value of contingent consideration	(1,200)	1,500
Gain on sale of equipment	(5)	(76)
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(236)	(127)
Accounts payable	486	(453)
Accrued expenses and other liabilities	85	123
Deferred revenue	0	(425)
Due to related party	0	1
Net cash used in operating activities	(4,383)	(5,195)
Investing activities
Sales of equipment	5	76
Net cash provided by investing activities	5	76
Financing activities
Proceeds from exercise of common stock options	0	40
Proceeds from issuance of common stock and common stock warrants, net of issuance costs	9,376	0
Proceeds from sale of common stock pursuant to ESPP	10	5
Net cash provided by financing activities	9,386	45
Net increase (decrease) in cash, cash equivalents and restricted cash	5,008	(5,074)
Cash, cash equivalents and restricted cash at beginning of period	14,690	25,352
Cash, cash equivalents and restricted cash at end of period	$ 19,698	$ 20,278

Subsequent Event	3 Months Ended
Subsequent Event	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event The Company has evaluated, for potential recognition and disclosure, events that occurred prior to the date at which the condensed consolidated financial statements were issued. On April 9, 2018, the Company granted 970,900 stock options at an exercise price of $1.50. From April 1, 2018 through May 10, 2018, the Company received approximately $4.2 million of net proceeds from the issuance of 5.2 million shares of common stock due to the exercise of common stock purchase warrants issued in connection with the Company's November 2017 Financing.

Organization and Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended
	Mar. 23, 2018	May 10, 2018	Mar. 31, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents			$ 19,688	$ 14,680
Net working capital			15,100
Accumulated deficit			$ 156,294	$ 152,331
Subsidiary, Sale of Stock [Line Items]
Net proceeds from sale of stock	$ 9,000
Number of shares sold (in shares)	7,968,128
Price per share (in usd per share)	$ 1.13
Number of warrant sold (in shares)	7,968,128
Warrant price per unit (usd per unit)	$ 0.125
Share of stock for each warrant (in shares)	1
Exercise price of warrants (usd per share)	$ 1.20
Expiration period	5 years
Subsequent Event
Subsidiary, Sale of Stock [Line Items]
Number of warrant sold (in shares)		5,200,000
Proceeds from exercise of warrants		$ 4,200

Significant Accounting Policies and Recent Accounting Pronouncements - Recently Adopted Accounting Standards (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash	$ 10	$ 10
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restricted cash		$ 10

Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets:
Restricted cash	$ 10	$ 10
Liabilities:
Contingent consideration	38,400	39,600
Unobservable Inputs (Level 3)
Liabilities:
Contingent consideration	38,400	39,600
Recurring
Assets:
Cash and cash equivalents	19,688	14,680
Restricted cash	10	10
Total assets	19,698	14,690
Liabilities:
Contingent consideration	38,400	39,600
Total liabilities	38,400	39,600
Recurring \| Active Markets (Level 1)
Assets:
Cash and cash equivalents	19,688	14,680
Restricted cash	10	10
Total assets	19,698	14,690
Liabilities:
Contingent consideration	0	0
Total liabilities	0	0
Recurring \| Observable Inputs (Level 2)
Assets:
Cash and cash equivalents	0	0
Restricted cash	0	0
Total assets	0	0
Liabilities:
Contingent consideration	0	0
Total liabilities	0	0
Recurring \| Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	0	0
Restricted cash	0	0
Total assets	0	0
Liabilities:
Contingent consideration	38,400	39,600
Total liabilities	$ 38,400	$ 39,600

Fair Value of Financial Instruments - Summary of Changes in Fair Value of Contingent Consideration (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance, December 31, 2017	$ 38,400	$ 39,600
Ending balance, March 31, 2018	38,400
Unobservable Inputs (Level 3)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance, December 31, 2017	38,400	$ 39,600
Gain from change in fair value of contingent consideration	(1,200)
Ending balance, March 31, 2018	$ 38,400

Fair Value of Financial Instruments - Additional Information (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Discount rate (in percentage)	9.10%	8.30%
Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Discount rate (in percentage)	10.50%	10.50%

License Agreement with Roche (Details) - USD ($)			3 Months Ended	7 Months Ended
License Agreement with Roche (Details) - USD ($)	Jan. 01, 2018	Jun. 10, 2016	Mar. 31, 2018	Dec. 31, 2016
Organization And Basis Of Presentation [Line Items]
Adjustments to transaction price			$ 0
Revenue recognized			0
Milestones achieved			0
Calculated under Revenue Guidance in Effect before Topic 606
Organization And Basis Of Presentation [Line Items]
Revenue recognized, transaction price			$ 0
Roche
Organization And Basis Of Presentation [Line Items]
Up-front license fee				$ 7,500,000
Additional up-front fee		$ 240,000,000
Roche \| Collaborative Arrangement, Revenue Based on Development Milestone
Organization And Basis Of Presentation [Line Items]
Amounp payable upon achievement of specified milestones		50,000,000
Roche \| First Indication
Organization And Basis Of Presentation [Line Items]
Amounp payable upon achievement of specified milestones		175,000,000
Roche \| Collaborative Arrangement, Revenue Based on Regulatory Milestone
Organization And Basis Of Presentation [Line Items]
Amounp payable upon achievement of specified milestones		50,000,000
Roche \| Collaborative Arrangement, Revenue Based on Commercialization Milestone
Organization And Basis Of Presentation [Line Items]
Amounp payable upon achievement of specified milestones		75,000,000
Roche \| Second Indication
Organization And Basis Of Presentation [Line Items]
Amounp payable upon achievement of specified milestones		$ 65,000,000
Roche \| EBI-031 \| Minimum
Organization And Basis Of Presentation [Line Items]
Royalty rate		7.50%
Roche \| EBI-031 \| Maximum
Organization And Basis Of Presentation [Line Items]
Royalty rate		15.00%
Roche \| EBI-031 \| Collaborative Arrangement, Revenue Based on Development Milestone
Organization And Basis Of Presentation [Line Items]
Amounp payable upon achievement of specified milestones				$ 22,500,000
Roche \| IL-6
Organization And Basis Of Presentation [Line Items]
Royalty rate		50.00%
Roche
Organization And Basis Of Presentation [Line Items]
Revenue recognized, transaction price	$ 30,000,000

Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Development costs	$ 2,650	$ 2,581
Employee compensation (including reduction in workforce)	896	735
Professional fees	237	463
Other	70	34
Total accrued expenses	$ 3,853	$ 3,813

Share-Based Payments - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended
	Mar. 14, 2018	Jan. 01, 2018	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense			$ 1.0
2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in number of shares reserved for future issuance (in shares)		1,388,103
Shares available for issuance (in shares)			2,594,634
2014 ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expected to be recognized over a weighted-average period (in years)			2 years 4 months 24 days
Employee stock purchase plan issued during period (in shares)	9,565
Purchase price of shares authorized (in USD per share)	$ 0.98

Share-Based Payments - Summary of Stock Option Activity (Detail)	3 Months Ended
	Mar. 31, 2018 $ / shares shares
Shares
Outstanding at beginning of period (in shares) \| shares	2,695,796
Granted (in shares) \| shares	102,500
Exercised (in shares) \| shares	0
Cancelled or forfeited (in shares) \| shares	(150,292)
Outstanding at end of period (in shares) \| shares	2,648,004
Exercisable at end of period (in shares) \| shares	1,580,060
Vested and expected to vest at end of period (in shares) \| shares	2,586,804
Weighted-Average Exercise Price
Outstanding at beginning of period (in USD per share) \| $ / shares	$ 3.16
Granted (in USD per share) \| $ / shares	0.93
Exercised (in USD per share) \| $ / shares	0.00
Cancelled or forfeited (in USD per share) \| $ / shares	2.20
Outstanding at end of period (in USD per share) \| $ / shares	3.13
Exercisable at end of period (in USD per share) \| $ / shares	3.79
Vested and expected to vest at end of period (in USD per share) \| $ / shares	$ 3.16

Share-Based Payments - Summary of Restricted Stock (Detail) - Restricted stock	3 Months Ended
	Mar. 31, 2018 $ / shares shares
Restricted Stock Units
Unvested at beginning of period (in shares) \| shares	4,430
Vested (in shares) \| shares	(4,430)
Unvested at end of period (in shares) \| shares	0
Weighted-Average Grant Date Fair Value
Unvested at beginning of period (in usd per share) \| $ / shares	$ 11.43
Vested (in usd per share) \| $ / shares	11.43
Unvested at end of period (in USD per share) \| $ / shares

Net (Loss) Income Per Share - Antidilutive Securities (Details) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock equivalents excluded from calculation of diluted net (loss) income per share (in shares)	20,250,354	2,661,741
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock equivalents excluded from calculation of diluted net (loss) income per share (in shares)	2,648,004	1,717,181
Unvested restricted stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock equivalents excluded from calculation of diluted net (loss) income per share (in shares)	0	17,720
Common stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock equivalents excluded from calculation of diluted net (loss) income per share (in shares)	17,602,350	926,840

Reduction in Workforce (Details) - USD ($) $ in Thousands	3 Months Ended
Reduction in Workforce (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Restructuring and Related Activities [Abstract]
Expected cost		$ 100
Severance costs paid	$ 100
Restructuring Reserve
Balance as of January 1, 2017	111
Payments	(53)
Balance as of March 31, 2018	$ 58

Cash, cash equivalents and restricted cash (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 19,688	$ 14,680
Restricted cash	10	10
Total cash, cash equivalents and restricted cash	$ 19,698	$ 14,690	$ 20,278	$ 25,352

Subsequent Event (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended
	Apr. 09, 2018	May 10, 2018	Mar. 31, 2018	Mar. 23, 2018
Subsequent Event [Line Items]
Options granted (in shares)			102,500
Exercise price of options granted (in USD per share)			$ 0.93
Number of warrant sold (in shares)				7,968,128
Subsequent Event
Subsequent Event [Line Items]
Options granted (in shares)	970,900
Exercise price of options granted (in USD per share)	$ 1.50
Proceeds from exercise of warrants		$ 4.2
Number of warrant sold (in shares)		5,200,000