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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2018	Nov. 02, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2018
Entity Registrant Name	AGENUS INC
Entity Central Index Key	0001098972
Trading Symbol	AGEN
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		119,982,965

Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 46,169,404	$ 60,186,617
Inventories	55,491	79,491
Accounts receivable	6,068,854	1,134,493
Prepaid expenses	14,530,053	11,070,960
Other current assets	811,925	1,081,993
Total current assets	67,635,727	73,553,554
Property, plant and equipment, net of accumulated amortization and depreciation of $37,108,300 and $34,029,085 at September 30, 2018 and December 31, 2017, respectively	25,838,782	26,178,622
Goodwill	22,959,112	23,048,804
Acquired intangible assets, net of accumulated amortization of $6,998,903 and $5,461,834 at September 30, 2018 and December 31, 2017, respectively	12,827,224	14,406,650
Other long-term assets	1,214,394	1,214,394
Total assets	130,475,239	138,402,024
LIABILITIES AND STOCKHOLDERS’ DEFICIT
Current portion, long-term debt	146,061	20,639,735
Current portion, liability related to sale of future royalties and milestones	23,920,667
Current portion, deferred revenue	843,150	4,484,882
Accounts payable	11,146,451	8,086,992
Accrued liabilities	21,665,078	21,569,449
Other current liabilities	468,978	1,657,063
Total current liabilities	58,190,385	56,438,121
Long-term debt, net of current portion	13,053,895	142,385,024
Liability related to sale of future royalties and milestones, net of current portion	183,322,966
Deferred revenue, net of current portion	1,469,131	7,748,284
Contingent purchase price considerations	2,917,000	4,373,000
Other long-term liabilities	2,914,480	3,273,387
Commitments and contingencies
STOCKHOLDERS’ DEFICIT
Common stock, par value $0.01 per share; 240,000,000 shares authorized; 118,352,706 and 101,706,117 shares issued at September 30, 2018 and December 31, 2017, respectively	1,183,527	1,017,061
Additional paid-in capital	999,580,589	951,811,958
Accumulated other comprehensive loss	(1,615,893)	(2,169,354)
Accumulated deficit	(1,129,556,515)	(1,026,475,773)
Total stockholders’ deficit attributable to Agenus Inc.	(130,407,976)	(75,815,792)
Non-controlling interest	(984,642)
Total stockholders’ deficit	(131,392,618)	(75,815,792)
Total liabilities and stockholders’ deficit	130,475,239	138,402,024
Series A-1 convertible preferred stock [Member]
STOCKHOLDERS’ DEFICIT
Preferred stock, par value $0.01 per share; 5,000,000 shares authorized: Series A-1 convertible preferred stock; 31,620 shares designated, issued, and outstanding at September 30, 2018 and December 31, 2017; liquidation value of $32,780,230 at September 30, 2018	$ 316	$ 316

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Property plant and equipment, accumulated amortization and depreciation	$ 37,108,300	$ 34,029,085
Acquired intangible assets, accumulated amortization	$ 6,998,903	$ 5,461,834
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	240,000,000	240,000,000
Common stock, shares issued	118,352,706	101,706,117
Series A-1 convertible preferred stock [Member]
Series A-1 convertible preferred stock, shares designated	31,620	31,620
Series A-1 convertible preferred stock, shares issued	31,620	31,620
Series A-1 convertible preferred stock, shares outstanding	31,620	31,620
Series A-1 convertible preferred stock, liquidation value	$ 32,780,230

Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Total revenues	$ 12,802,427	$ 3,359,399	$ 30,333,093	$ 34,522,815
Operating expenses:
Research and development	(29,854,310)	(25,788,707)	(88,569,123)	(84,253,129)
General and administrative	(9,203,406)	(8,050,783)	(27,616,079)	(23,956,543)
Contingent purchase price consideration fair value adjustment	180,000	(1,184,000)	1,456,000	(123,000)
Operating loss	(26,075,289)	(31,664,091)	(84,396,109)	(73,809,857)
Other expense:
Loss on early extinguishment of debt			(10,766,625)
Non-operating (expense) income	(117,172)	(472,745)	(1,489,835)	1,917,200
Interest expense, net	(7,538,096)	(4,704,871)	(16,542,911)	(13,765,271)
Net loss	(33,730,557)	(36,841,707)	(113,195,480)	(85,657,928)
Dividends on Series A-1 convertible preferred stock	(51,752)	(51,426)	(155,011)	(154,034)
Less: net loss attributable to non-controlling interest	(604,887)		(1,258,242)
Net loss attributable to Agenus Inc. common stockholders	$ (33,177,422)	$ (36,893,133)	$ (112,092,249)	$ (85,811,962)
Per common share data:
Basic and diluted net loss attributable to Agenus Inc. common stockholders	$ (0.29)	$ (0.37)	$ (1.04)	$ (0.88)
Weighted average number of Agenus Inc. common shares outstanding:
Basic and diluted	114,977,416	99,891,980	107,601,000	97,557,409
Other comprehensive loss:
Foreign currency translation (loss) gain	$ (38,276)	$ 231,177	$ 553,461	$ (529,118)
Other comprehensive (loss) income	(38,276)	231,177	553,461	(529,118)
Comprehensive loss	(33,215,698)	(36,661,956)	(111,538,788)	(86,341,080)
Research and Development [Member]
Revenue:
Total revenues	6,276,136	$ 3,359,399	18,385,111	$ 34,522,815
Non-Cash Royalty Revenue Related to the Sale of Future Royalties [Member]
Revenue:
Total revenues	$ 6,526,291		$ 11,947,982

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net loss	$ (113,195,480)	$ (85,657,928)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,744,672	4,561,815
Share-based compensation	5,694,829	7,083,948
Non-cash royalty revenue	(11,947,982)
Non-cash interest expense	16,063,404	13,360,630
Loss (gain) on disposal of assets	117,817	(19,822)
Gain on issuance of stock for settlement of milestone obligation		(14,063)
Change in fair value of contingent obligations	(1,456,000)	123,000
Loss on extinguishment of debt	10,766,625
Changes in operating assets and liabilities:
Accounts receivable	(4,934,361)	9,160,979
Inventories	24,000	7,959
Prepaid expenses	(3,469,828)	(8,178,360)
Accounts payable	2,882,184	1,006,808
Deferred revenue	(1,064,391)	(2,006,858)
Accrued liabilities and other current liabilities	222,462	(5,962,198)
Other operating assets and liabilities	269,216	(1,823,880)
Net cash used in operating activities	(95,282,833)	(68,357,970)
Cash flows from investing activities:
Proceeds from sale of plant and equipment	6,187	120,000
Purchases of plant and equipment	(2,995,572)	(2,366,429)
Purchases of held-to-maturity securities		(14,936,047)
Proceeds from securities held-to-maturity		15,000,000
Net cash used in investing activities	(2,989,385)	(2,182,476)
Cash flows from financing activities:
Net proceeds from sale of equity	41,279,969	63,677,302
Proceeds from employee stock purchases and option exercises	1,233,900	833,982
Purchase of treasury shares to satisfy tax withholdings		(527,223)
Proceeds from sale of future royalties	204,878,400
Transaction costs from sale of future royalties and milestones	(494,394)
Repayments of debt	(161,847,220)
Payment of capital lease obligation	(193,164)	(216,982)
Net cash provided by financing activities	84,857,491	63,767,079
Effect of exchange rate changes on cash	(602,486)	400,708
Net (decrease) increase in cash and cash equivalents	(14,017,213)	(6,372,659)
Cash and cash equivalents, beginning of period	60,186,617	71,448,016
Cash and cash equivalents, end of period	46,169,404	65,075,357
Supplemental cash flow information:
Cash paid for interest	837,699	837,699
Supplemental disclosures - non-cash activities:
Purchases of plant and equipment in accounts payable and accrued liabilities	$ 122,038	222,203
Milestone obligation [Member]
Supplemental disclosures - non-cash activities:
Issuance of common stock, $0.01 par value, issued in connection with the settlement of milestone obligation		$ 1,485,937

Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical)	Sep. 30, 2018 $ / shares
Supplemental disclosures - non-cash activities:
Common stock, par value	$ 0.01
Milestone obligation [Member]
Supplemental disclosures - non-cash activities:
Common stock, par value	$ 0.01

Business, Liquidity and Basis of Presentation

9 Months Ended

Sep. 30, 2018

Description Of Business [Abstract]

Business, Liquidity And Basis of Presentation

Note A - Business, Liquidity and Basis of Presentation

Agenus Inc. (including its subsidiaries, collectively referred to as “Agenus,” the “Company,” “we,” “us,” and “our”) is a clinical-stage immuno-oncology (“I-O”) company dedicated to becoming a leader in the discovery and development of innovative combination therapies and committed to bringing effective medicines to patients with cancer. Our business is designed to drive success in I-O through speed, innovation, and effective combination therapies. We have assembled fully integrated capabilities from novel target discovery, antibody generation, cell line development, and good manufacturing practice (“GMP”) manufacturing together with a comprehensive portfolio consisting of antibody-based therapeutics, adjuvants, cancer vaccine platforms, and cell therapy (through our subsidiary, AgenTus Therapeutics, Inc. (“AgenTus Therapeutics”)). We leverage our immune biology platforms to identify effective combination therapies for development and have developed productive partnerships to advance our innovation.

We are developing a comprehensive I-O portfolio driven by the following platforms and programs, which we intend to utilize individually and in combination:

•

our antibody discovery platforms, including our Retrocyte Display™, SECANT^® yeast display, and phage display technologies designed to drive the discovery of future CPM antibody candidates;

•

our antibody candidate programs, including our CPM programs;

•

our vaccine programs, including Prophage™, AutoSynVax™ and PhosPhoSynVax™;

•

our saponin-based vaccine adjuvants, principally our QS-21 Stimulon^® adjuvant, or QS-21 Stimulon; and

•

our cell therapy subsidiary, AgenTus Therapeutics, which is designed to drive the discovery of future adoptive cell therapy, or “living drugs” (CAR-T and TCR) programs.

Our business activities include product research and development, intellectual property prosecution, manufacturing, regulatory and clinical affairs, corporate finance and development activities, and support of our collaborations. Our product candidates require clinical trials and approvals from regulatory agencies, as well as acceptance in the marketplace. Part of our strategy is to develop and commercialize some of our product candidates by continuing our existing arrangements with academic and corporate collaborators and licensees and by entering into new collaborations.

Our cash and cash equivalents at September 30, 2018 were $46.2 million, a decrease of $14.0 million from December 31, 2017.

The following table outlines our quarter end cash and cash equivalents balances and the changes therein (in millions).

	Quarter Ended
	March 31, 2018			June 30, 2018			September 30, 2018
Cash and cash equivalents	$	52.3		$	43.2		$	46.2
(Decrease) increase in cash and cash equivalents	$	(7.8	)	$	(9.2	)	$	3.0
Cash used in operating activities	$	(40.2	)	$	(30.5	)	$	(24.6	)
Reported net loss	$	(54.3	)	$	(25.2	)	$	(33.7	)

We have incurred significant losses since our inception. As of September 30, 2018, we had an accumulated deficit of $1.1 billion. Since our inception, we have successfully financed our operations through the sale of equity, notes, corporate partnerships, and interest income. Based on our current plans, including the additional funding we received during October 2018 (see Note O), and funding we anticipate from other sources, including out-licensing and/or partnering opportunities, we believe that our cash resources of $46.2 million as of September 30, 2018 will be sufficient to satisfy our liquidity requirements into the second quarter of 2019. We also continue to monitor the likelihood of success of our key initiatives and can discontinue funding of such activities if they do not prove to be successful, restrict capital expenditures and/or reduce the scale of our operations if necessary. In spite of these anticipated sources of funding and our ability to control our cash burn, in accordance with the requirements of ASU 2014-15, we are required to disclose the existence of a substantial doubt regarding our ability to continue as a going concern for twelve months from when these financial statements were issued.

Our future liquidity needs will be determined primarily by the success of our operations with respect to the progression of our product candidates and key development and regulatory events in the future. Potential sources of additional funding include: (1) pursuing collaboration, out-licensing and/or partnering opportunities for our portfolio programs and product candidates with one or more third parties, (2) renegotiating third party agreements, (3) selling assets, (4) securing additional debt financing and/or (5) selling equity securities. We believe the execution of one or more of these transactions will enable us to fund our planned operations for at least one year from when these financial statements were issued. Our ability to address our liquidity needs will largely be determined by the success of our product candidates and key development and regulatory events and our decisions in the future as well as the execution of one or more of the aforementioned contemplated transactions.

The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete annual consolidated financial statements. In the opinion of our management, the condensed consolidated financial statements include all normal and recurring adjustments considered necessary for a fair presentation of our financial position and operating results. All significant intercompany transactions and accounts have been eliminated in consolidation. Operating results for the nine months ended September 30, 2018, are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. For further information, refer to our consolidated financial statements and footnotes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2017 filed with the Securities and Exchange Commission (the “SEC”) on March 16, 2018.

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management bases its estimates on historical experience and on various assumptions that are believed to be reasonable under the circumstances. Actual results could differ materially from those estimates.

For our foreign subsidiaries the local currency is the functional currency. Assets and liabilities of our foreign subsidiaries are translated into U.S. dollars using rates in effect at the balance sheet date while revenues and expenses are translated into U.S. dollars using average exchange rates during the period. The cumulative translation adjustment resulting from changes in exchange rates are included in the consolidated balance sheets as a component of accumulated other comprehensive loss in total stockholders’ deficit.

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Note B - Summary of Significant Accounting Policies

Except as detailed below, there have been no material changes to our significant accounting policies during the nine months ended September 30, 2018, as compared to the significant accounting policies disclosed in Note 2 of the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017.

Revenue

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes existing revenue recognition guidance. We adopted ASU 2014-09 and its related amendments (collectively known as “ASC 606”) on January 1, 2018 using the modified retrospective method- i.e., by recognizing the cumulative effect of initially applying ASC 606 as an adjustment to the opening balance of equity at January 1, 2018. The reported results for 2018 reflect the application of ASC 606 guidance while the reported results for 2017 were prepared under the guidance of ASC 605, Revenue Recognition (“ASC 605”). The adoption of ASC 606 represents a change in accounting principle that will more closely align revenue recognition with the delivery of our goods and services and will provide financial statement readers with enhanced disclosures. The details of the significant changes and quantitative impact of the changes are disclosed in Note J.

In accordance with ASC 606, revenue is recognized when a customer obtains control of promised goods or services. The amount of revenue recognized reflects the consideration to which we expect to be entitled to receive in exchange for these goods and services. To achieve this core principle, we apply the following five steps:

1) Identify the contract with the customer

A contract with a customer exists when (i) the Company enters into an enforceable contract with a customer that defines each party’s rights regarding the goods or services to be transferred and identifies the related payment terms, (ii) the contract has commercial substance, and (iii) the Company determines that collection of substantially all consideration for goods and services that are transferred is probable based on the customer’s intent and ability to pay the promised consideration. The Company applies judgment in determining the customer’s intent and ability to pay, which is based on a variety of factors including the customer’s historical payment experience, or in the case of a new customer, published credit and financial information pertaining to the customer.

2) Identify the performance obligations in the contract

Performance obligations promised in a contract are identified based on the goods and services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the good or service either on its own or together with other available resources, and are distinct in the context of the contract, whereby the transfer of the good or service is separately identifiable from other promises in the contract. To the extent a contract includes multiple promised goods and services, the Company must apply judgment to determine whether promised goods and services are capable of being distinct and are distinct in the context of the contract. If these criteria are not met, the promised goods and services are accounted for as a combined performance obligation.

3) Determine the transaction price

The transaction price is determined based on the consideration to which the Company will be entitled in exchange for transferring goods and services to the customer. To the extent the transaction price includes variable consideration, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing either the expected value method or the most likely amount method depending on the nature of the variable consideration. Variable consideration is included in the transaction price if, in the Company’s judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. Any estimates, including the effect of the constraint on variable consideration, are evaluated at each reporting period for any changes. Determining the transaction price requires significant judgment, which is discussed in further detail for each of the Company’s contracts with customers in Note J.

4) Allocate the transaction price to performance obligations in the contract

If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. Contracts that contain multiple performance obligations require an allocation of the transaction price to each performance obligation on a relative stand-alone selling price basis unless the transaction price is variable and meets the criteria to be allocated entirely to a performance obligation or to a distinct service that forms part of a single performance obligation. The consideration to be received is allocated among the separate performance obligations based on relative stand-alone selling prices. Determining the amount of the transaction price to allocate to each separate performance obligation requires significant judgement, which is discussed in further detail for each of the Company’s contracts with customers in Note J.

5) Recognize revenue when or as the Company satisfies a performance obligation

The Company satisfies performance obligations either over time or at a point in time. Revenue is recognized over time if either 1) the customer simultaneously receives and consumes the benefits provided by the entity’s performance, 2) the entity’s performance creates or enhances an asset that the customer controls as the asset is created or enhanced, or 3) the entity’s performance does not create an asset with an alternative use to the entity and the entity has an enforceable right to payment for performance completed to date. If the entity does not satisfy a performance obligation over time, the related performance obligation is satisfied at a point in time by transferring the control of a promised good or service to a customer. Examples of control are using the asset to produce goods or services, enhance the value of other assets, settle liabilities, and holding or selling the asset. ASC 606 requires the Company to select a single revenue recognition method for the performance obligation that faithfully depicts the Company’s performance in transferring control of the goods and services. The guidance allows entities to choose between two methods to measure progress toward complete satisfaction of a performance obligation:

Output methods - recognize revenue on the basis of direct measurements of the value to the customer of the goods or services transferred to date relative to the remaining goods or services promised under the contract (e.g. surveys of performance completed to date, appraisals of results achieved, milestones reached, time elapsed, and units of produced or units delivered); and

Input methods - recognize revenue on the basis of the entity’s efforts or inputs to the satisfaction of a performance obligation (e.g., resources consumed, labor hours expended, costs incurred, or time elapsed) relative to the total expected inputs to the satisfaction of that performance obligation.

Licenses of intellectual property: If the license to the Company’s intellectual property is determined to be distinct from the other performance obligations identified in the arrangement, the Company recognizes revenue from non-refundable, up-front fees allocated to the license when the license is transferred to the customer and the customer is able to use and benefit from the license. For licenses that are bundled with other promises, the Company utilizes judgment to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue from non-refundable, up-front fees. The Company evaluates the measure of progress each reporting period and, if necessary, adjusts the measure of performance and related revenue recognition.

Milestone payments: At the inception of each arrangement that includes development, regulatory or commercial milestone payments, the Company evaluates whether the milestones are considered probable of being reached and estimates the amount to be included in the transaction price. ASC 606 suggests two alternatives to use when estimating the amount of variable consideration: the expected value method and the most likely amount method. Under the expected value method, an entity considers the sum of probability-weighted amounts in a range of possible consideration amounts. Under the most likely amount method, an entity considers the single most likely amount in a range of possible consideration amounts. Whichever method is used, it should be consistently applied throughout the life of the contract; however, it is not necessary for the Company to use the same approach for all contracts. The Company uses the most likely amount method for development and regulatory milestone payments. If it is probable that a significant revenue reversal would not occur, the associated milestone value is included in the transaction price. The transaction price is then allocated to each performance obligation on a relative stand-alone selling price basis. The Company recognizes revenue as or when the performance obligations under the contract are satisfied. At the end of each subsequent reporting period, the Company re-evaluates the probability or achievement of each such milestone and any related constraint, and if necessary, adjusts its estimates of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect revenues and earnings in the period of adjustment.

Royalties: 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).

Up-front Fees: Depending on the nature of the agreement, up-front payments and fees may be recorded as deferred revenue upon receipt or when due and may require deferral of revenue recognition to a future period until the Company performs its obligations under these arrangements. Amounts payable to the Company are recorded as accounts receivable when the Company’s right to consideration is unconditional. The Company does not assess whether a contract has a significant financing component if the expectation at contract inception is such that the period between payment by the customer and the transfer of the promised goods or services to the customer will be one year or less.

Impact of Adopting ASC 606 on Financial Statements

We adopted ASC 606 using the modified retrospective method. The cumulative effect of applying the new guidance to all contracts with customers that were not completed as of January 1, 2018 was recorded as an adjustment to accumulated deficit as of the adoption date. We elected to apply a practical expedient to reflect the aggregate effect of all modifications that occurred before January 1, 2018 when identifying the satisfied and unsatisfied performance obligations, determining the transaction price, and allocating the transaction price to the satisfied and unsatisfied performance obligations. The estimated effect of applying this practical expedient results in a slower recognition of the transaction price, as more consideration is allocated to performance obligations originally identified as a material right at contract inception. As a result of applying the modified retrospective method to adopt the new revenue guidance, the following adjustments were made to the consolidated balance sheet as of January 1, 2018 (in thousands):

	As Reported December 31, 2017			ASC 606 Adjustment			Adjusted January 1, 2018
Consolidated Balance Sheet Data:
Current portion, deferred revenue	$	4,485		$	(2,986	)	$	1,499
Deferred revenue, net of current portion		7,748			(5,870	)		1,878
Accumulated deficit	$	(1,026,476	)	$	8,856		$	(1,017,620	)

Impact of ASC 606 on Financial Statements

In accordance with Topic 606, the disclosure of the impact of adoption to our condensed consolidated statements of income and balance sheets was as follows (in thousands):

	Nine months ended September 30, 2018
	As Reported Under ASC 606			Adjustments			Notes			Balances without Adoption of ASC 606
Consolidated Balance Sheet Data:
Accounts receivable	$	6,069		$	(5,000	)		(1	)	$	1,069
Current portion, deferred revenue		843			1,045			(2	)		1,888
Deferred revenue, net of current portion		1,469			4,863			(2	)		6,332
Accumulated deficit		(1,129,557	)		(10,908	)		(3	)		(1,140,465	)

Consolidated Statement of Operations Data:
Research and development revenue	$	18,385		$	(2,051	)		(4	)	$	16,334

	Three months ended September 30, 2018
Consolidated Statement of Operations Data:
Research and development revenue	$	6,276		$	(790	)		(4	)	$	5,486

(1)

Adjustment to accounts receivable to reflect a milestone recognized under ASC 606 and included in accounts receivable on September 30, 2018.

(2)

Adjustment to deferred revenue to reflect recognition of revenue under ASC 605 primarily attributable to the change in the timing of revenue recognition for amounts received under the Incyte Collaboration Agreement, see Note J.

(3)

Adjustment to accumulated deficit to reflect the reversal of the cumulative transition adjustment and the difference in revenue from ASC 606 to ASC 605, see Note J.

(4)

Adjustment to reflect the difference in revenue recognition from ASC 606 to ASC 605 primarily attributable to the timing of milestone recognition and the change in recognition of an upfront fee related to the GSK License and Amended Supply Agreements, see Note J.

Net Loss Per Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share

Note C - Net Loss Per Share

Basic net loss per common share is calculated by dividing the net loss attributable to common stockholders by the weighted average number of common shares outstanding (including common shares issuable under our Directors’ Deferred Compensation Plan, or “DDCP”). Diluted income per common share is calculated by dividing net income attributable to common stockholders by the weighted average number of common shares outstanding (including common shares issuable under our DDCP) plus the dilutive effect of outstanding instruments such as warrants, stock options, non-vested shares, convertible preferred stock, and convertible notes. Because we reported a net loss attributable to common stockholders for all periods presented, diluted loss per common share is the same as basic loss per common share, as the effect of utilizing the fully diluted share count would have reduced the net loss per common share. Therefore, the following potentially dilutive securities have been excluded from the computation of diluted weighted average shares outstanding as of September 30, 2018 and 2017, as they would be anti-dilutive:

	Three and Nine Months Ended September 30,
	2018		2017
Warrants		2,900,000		4,351,450
Stock options		16,917,576		14,749,924
Non-vested shares		2,221,795		1,915,991
Convertible preferred stock		333,333		333,333

Investments

9 Months Ended

Sep. 30, 2018

Cash And Cash Equivalents [Abstract]

Investments

Note D - Investments

Cash equivalents consisted of the following as of September 30, 2018 and December 31, 2017 (in thousands):

September 30, 2018

December 31, 2017

Cost

Estimated

Fair Value

Cost

Estimated

Fair Value

Institutional money market funds

25,372

57,036

As a result of the short-term nature of our investments, there were minimal unrealized holding gains or losses for the three and nine months ended September 30, 2018 and 2017.

Goodwill and Acquired Intangible Assets

9 Months Ended

Sep. 30, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Acquired Intangible Assets

Note E - Goodwill and Acquired Intangible Assets

The following table sets forth the changes in the carrying amount of goodwill for the nine months ended September 30, 2018 (in thousands):

Balance, December 31, 2017	$	23,049
Foreign currency translation adjustment		(90	)
Balance, September 30, 2018	$	22,959

Acquired intangible assets consisted of the following as of September 30, 2018 and December 31, 2017 (in thousands):

	As of September 30, 2018
	Amortization period (years)	Gross carrying amount		Accumulated amortization			Net carrying amount
Intellectual property	7-15 years	$	16,520	$	(5,684	)	$	10,836
Trademarks	4.5 years		821		(821	)		-
Other	2-6 years		569		(494	)		75
In-process research and development	Indefinite		1,916		—			1,916
Total		$	19,826	$	(6,999	)	$	12,827

	As of December 31, 2017
	Amortization period (years)	Gross carrying amount		Accumulated amortization			Net carrying amount
Intellectual property	7-15 years	$	16,545	$	(4,290	)	$	12,255
Trademarks	4.5 years		826		(711	)		115
Other	2-6 years		570		(461	)		109
In-process research and development	Indefinite		1,928		—			1,928
Total		$	19,869	$	(5,462	)	$	14,407

The weighted average amortization period of our finite-lived intangible assets is 9 years. Amortization expense related to acquired intangibles is estimated at $0.5 million for the remainder of 2018 and $1.9 million for each of the years ending December 31, 2019, 2020, 2021 and 2022.

Debt

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Debt

Note F - Debt

Debt obligations consisted of the following as of September 30, 2018 and December 31, 2017 (in thousands):

Debt instrument	Principal at September 30, 2018		Non-cash Interest		Unamortized Debt Issuance Costs			Unamortized Debt Discount			Balance at September 30, 2018
Current Portion:
Debentures	$	146	$	—	$	—		$	—		$	146
Long-term Portion:
2015 Subordinated Notes		14,000		—		—			(946	)		13,054
Total	$	14,146	$	—	$	—		$	(946	)	$	13,200

Debt instrument	Principal at December 31, 2017		Non-cash Interest		Unamortized Debt Issuance Costs			Unamortized Debt Discount			Balance at December 31, 2017
Current Portion:
Debentures	$	146	$	—	$	—		$	—		$	146
Note Purchase Agreement		15,000		5,494		—			—			20,494
Total current		15,146		5,494		—			—			20,640
Long-term Portion:
2015 Subordinated Notes		14,000		—		—			(1,375	)		12,625
Note Purchase Agreement		100,000		31,323		(1,362	)		(201	)		129,760
Total long-term		114,000		31,323		(1,362	)		(1,576	)		142,385
Total	$	129,146	$	36,817	$	(1,362	)	$	(1,576	)	$	163,025

We have capital lease agreements that expire in 2020 for equipment with a carrying value of approximately $950,000, which is included in property, plant and equipment, net on our condensed consolidated balance sheet. Under the terms of the capital lease agreements, we will remit payments to the lessors of $94,000 for the remainder of 2018, $375,000 for the year ending December 31, 2019 and $165,000 for the year ending December 31, 2020. As of September 30, 2018, our remaining obligation under the capital lease agreements is approximately $550,000, of which $360,000 and $180,000 are classified as other current and other long-term liabilities, respectively, on our condensed consolidated balance sheet.

In January 2018, we, through our wholly-owned subsidiary, Antigenics LLC (“Antigenics”), entered into a Royalty Purchase Agreement (the “HCR Royalty Purchase Agreement”) with Healthcare Royalty Partners III, L.P., and certain of its affiliates (collectively “HCR”), whereby we received gross proceeds of $190.0 million (refer to Note G). Concurrently with the closing of the HCR Royalty Purchase Agreement, we used $161.9 million of these proceeds to redeem Antigenics’ $115.0 million principal amount of notes issued pursuant to the Note Purchase Agreement dated September 4, 2015 with Oberland Capital SA Zermatt LLC and the purchasers named therein (the “Note Purchase Agreement”), as well as the associated accrued and unpaid interest, and the Note Purchase Agreement and the notes issued thereunder were redeemed in full and terminated. In connection with this redemption, we recorded a $10.8 million loss on early extinguishment of debt which primarily reflects the payment of premiums to fully redeem the notes and the write-off of unamortized debt issuance costs and discounts.

Liability Related to the Sale of Future Royalties and Milestones

9 Months Ended

Sep. 30, 2018

Note G – Liability Related to the Sale of Future Royalties and Milestones

The following table shows the activity within the liability account in the nine months ended September 30, 2018 (in thousands):

	Nine months ended September 30, 2018
Liability related to sale of future royalties and milestones - beginning balance	$	—
Proceeds from sale of future royalties and milestones		205,000
Non-cash royalty revenue		(11,948	)
Non-cash interest expense recognized		14,741
Liability related to sale of future royalties and milestones - ending balance		207,793
Less: unamortized transaction costs		(549	)
Liability related to sale of future royalties and milestones, net	$	207,244

Healthcare Royalty Partners

On January 6, 2018, we, through Antigenics, entered into the HCR Royalty Purchase Agreement with HCR, which closed on January 19, 2018. Pursuant to the terms of the HCR Royalty Purchase Agreement, we sold to HCR 100% of Antigenics’ worldwide rights to receive royalties from GlaxoSmithKline (“GSK”) on sales of GSK’s vaccines containing our QS-21 Stimulon adjuvant. At closing, we received gross proceeds of $190.0 million from HCR. As part of the transaction, we reimbursed HCR for transaction costs of $100,000 and incurred approximately $500,000 in transaction costs of our own, which are presented net of the liability in the consolidated balance sheet and will be amortized to interest expense over the estimated life of the HCR Royalty Purchase Agreement. Although we sold all of our rights to receive royalties on sales of GSK’s vaccines containing QS-21, as a result of our obligation to HCR, we are required to account for these royalties as revenue when earned, and we recorded the $190.0 million in proceeds from this transaction as a liability on our condensed consolidated balance sheet that will be amortized using the interest method over the estimated life of the HCR Royalty Purchase Agreement. The liability is classified between the current and non-current portion of liability related to sale of future royalties and milestones in the consolidated balance sheets based on the estimated recognition of the royalty payments to be received by HCR in the next 12 months from the financial statement reporting date.

During the nine months ended September 30, 2018, we recognized $11.9 million of non-cash royalty revenue, and we recorded $14.7 million of related non-cash interest expense related to the HCR Royalty Purchase Agreement.

As royalties are remitted to HCR from GSK, the balance of the recorded liability will be effectively repaid over the life of the HCR Royalty Purchase Agreement. To determine the amortization of the recorded liability, we are required to estimate the total amount of future royalty payments to be received by HCR. The sum of these amounts less the $190.0 million proceeds we received will be recorded as interest expense over the life of the HCR Royalty Purchase Agreement. Periodically, we assess the estimated royalty payments to be paid to HCR from GSK, and to the extent the amount or timing of the payments is materially different from our original estimates, we will prospectively adjust the amortization of the liability. During the three months ended September 30, 2018, our estimate of the effective annual interest rate over the life of the agreement increased to 14.6%, which results in a prospective interest rate of 14.0%.

There are a number of factors that could materially affect the amount and timing of royalty payments from GSK, all of which are not within our control. Such factors include, but are not limited to, changing standards of care, the introduction of competing products, manufacturing or other delays, biosimilar competition, patent protection, adverse events that result in governmental health authority imposed restrictions on the use of the drug products, significant changes in foreign exchange rates, and other events or circumstances that could result in reduced royalty payments from GSK, all of which would result in a reduction of non-cash royalty revenues and the non-cash interest expense over the life of the HCR Royalty Purchase Agreement. Conversely, if sales of GSK’s vaccines containing QS-21 are more than expected, the non-cash royalty revenues and the non-cash interest expense recorded by us would be greater over the life of the HCR Royalty Purchase Agreement.

Pursuant to the HCR Royalty Purchase Agreement, we will also be entitled to receive up to $40.4 million in milestone payments based on sales of GSK’s vaccines as follows: (i) $15.1 million upon reaching $2.0 billion last-twelve-months net sales any time prior to 2024 and (ii) $25.3 million upon reaching $2.75 billion last-twelve-months net sales any time prior to 2026.

Additionally, pursuant to the HCR Royalty Purchase Agreement, we would owe approximately $25.9 million to HCR in 2021 (the “Rebate Payment”) if neither of the following sales milestones are achieved: (i) 2019 sales exceed $1.0 billion or (ii) 2020 sales exceed $1.75 billion. As part of the transaction, we provided a guaranty for the potential Rebate Payment and secured the obligation with substantially all of our assets pursuant to a security agreement, subject to certain customary exceptions and excluding all assets necessary for AgenTus Therapeutics.

XOMA

On September 20, 2018, we, through our wholly-owned subsidiary, Agenus Royalty Fund, LLC, entered into a Royalty Purchase Agreement (the “XOMA Royalty Purchase Agreement”) with XOMA (US) LLC (“XOMA”). Pursuant to the terms of the XOMA Royalty Purchase Agreement, XOMA paid us $15.0 million at closing in exchange for the right to receive 33% of the future royalties and 10% of the future milestones that we are entitled to receive from Incyte Corporation (“Incyte”) and Merck Sharpe & Dohme (“Merck”) under our agreements with each party (see Note J), net of certain of our obligations to a third party and excluding the $5.0 million milestone from Incyte that we recognized in the quarter ended September 30, 2018. We retained 90% of the future milestones and 67% of the future royalties under our agreements with Incyte and Merck. Although we sold our rights to receive 33% of future royalties and 10% of future milestones, as a result of our significant continued involvement in the generation of the potential royalties and milestones, we are required to account for the full amount of these royalties and milestones as revenue when earned, and we recorded the $15.0 million in proceeds from this transaction as a liability on our condensed consolidated balance sheet. Under the terms of the XOMA Royalty Purchase Agreement, should the percentage of milestones and royalties ultimately received by XOMA fail to repay the amount received by us at closing we would have no further obligation to XOMA.

Accrued Liabilities

9 Months Ended

Sep. 30, 2018

Other Liabilities Disclosure [Abstract]

Accrued Liabilities

Note H - Accrued Liabilities

Accrued liabilities consisted of the following as of September 30, 2018 and December 31, 2017 (in thousands):

	September 30, 2018		December 31, 2017
Payroll	$	5,364	$	7,790
Professional fees		2,790		2,021
Contract manufacturing costs		5,883		5,528
Research services		6,260		4,663
Other		1,368		1,567
Total	$	21,665	$	21,569

Fair Value Measurements

9 Months Ended

Sep. 30, 2018

Fair Value Measurements [Abstract]

Fair Value Measurements

Note I - Fair Value Measurements

We measure our contingent purchase price considerations at fair value.

The fair values of our contingent purchase price considerations, $2.9 million, are based on significant inputs not observable in the market, which require them to be reported as Level 3 liabilities within the fair value hierarchy. The valuation of these liabilities use assumptions we believe would be made by a market participant and are based on estimates from a Monte Carlo simulation of our market capitalization and share price, and other factors impacting the probability of triggering the milestone payments. Market capitalization and share price were evolved using a geometric Brownian motion, calculated daily for the life of the contingent purchase price considerations.

Liabilities measured at fair value are summarized below (in thousands):

Description	September 30, 2018		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Liabilities:
Contingent purchase price considerations	$	2,917	$	—	$	—	$	2,917
Total	$	2,917	$	—	$	—	$	2,917

Description	December 31, 2017		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Liabilities:
Contingent purchase price consideration	$	4,373	$	—	$	—	$	4,373
Total	$	4,373	$	—	$	—	$	4,373

The following table presents our liabilities measured at fair value using significant unobservable inputs (Level 3), as of September 30, 2018 (in thousands):

Balance, December 31, 2017

4,373

Change in fair value of contingent purchase price considerations

during the period

(1,456

)

Balance, September 30, 2018

2,917

The estimated fair values of all of our financial instruments, excluding our outstanding debt as of December 31, 2017, approximate their carrying amounts in our condensed consolidated balance sheets.

The fair value of our outstanding debt balance at September 30, 2018 and December 31, 2017 was $14.2 million and $205.9 million, respectively, based on the Level 2 valuation hierarchy of the fair value measurements standard using a present value methodology that was derived by evaluating the nature and terms of each note and considering the prevailing economic and market conditions at the balance sheet date. The principal amount of our outstanding debt balance at September 30, 2018 and December 31, 2017 was $14.1 million and $129.1 million, respectively.

- Definition

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

+ References + Details

Revenue from Contracts with Customers

9 Months Ended

Sep. 30, 2018

Collaboration [Abstract]

Revenue from Contracts with Customers

Note J - Revenue from Contracts with Customers

GSK License and Amended GSK Supply Agreements

In July 2006, we entered into a license agreement and a supply agreement with GSK for the use of QS-21 Stimulon (the “GSK License Agreement” and the “GSK Supply Agreement”, respectively). In January 2009, we entered into an Amended and Restated Manufacturing Technology Transfer and Supply Agreement (the “Amended GSK Supply Agreement”) under which GSK has the right to manufacture all of its requirements of commercial grade QS-21 Stimulon. GSK is obligated to supply us (or our affiliates, licensees, or customers) certain quantities of commercial grade QS-21 Stimulon for a stated period of time. Under these agreements, GSK paid an upfront license fee of $3.0 million and agreed to pay aggregate milestones of $5.0 million. In July 2007, the Amended GSK Supply Agreement was further amended, and we were paid an additional fixed fee of $7.3 million. In March 2012 we entered into a First Right to Negotiate and Amendment Agreement amending the GSK License Agreement and the Amended GSK Supply Agreement to clarify and include additional rights for the use of our QS-21 Stimulon (the “GSK First Right to Negotiate Agreement”). In addition, we granted GSK the first right to negotiate for the purchase of the Company or certain of our assets, which such rights expired in March 2017. As consideration for entering into the GSK First Right to Negotiate Agreement, GSK paid us an upfront, non-refundable payment of $9.0 million, $2.5 million of which is creditable toward future royalty payments. As of December 31, 2017, we had received all of the potential $24.3 million in upfront and milestone payments related to the GSK Agreements. We were also generally entitled to receive 2% royalties on net sales of prophylactic vaccines for a period of 10 years after the first commercial sale of a resulting GSK product, but we sold these royalty rights to HCR in January 2018 pursuant to the HCR Royalty Purchase Agreement (See Note G). The GSK License and Amended GSK Supply Agreements may be terminated by either party upon a material breach if the breach is not cured within the time specified in the respective agreement. The termination or expiration of the GSK License Agreement does not relieve either party from any obligation which accrued prior to the termination or expiration. Among other provisions, the license rights granted to GSK survive expiration of the GSK License Agreement. The license rights and payment obligations of GSK under the Amended GSK Supply Agreement survive termination or expiration, except that GSK's license rights and future royalty obligations do not survive if we terminate due to GSK's material breach unless we elect otherwise.

We assessed this arrangement in accordance with ASC 606 and concluded that the contract counterparty, GSK, is a customer. We identified the following performance obligations under the contract: (1) an exclusive license to QS-21 in the specified field and related technology transfer; and (2) and exclusive license to QS-21 in an additional field.

We determined that the fixed payments of $19.3 million constituted all of the consideration to be included in the transaction price and to be allocated to the performance obligations based on their relative stand-alone selling prices. The fixed upfront consideration is recognized under ASC 606 based on when control of the combined performance obligation is transferred to the customer, which corresponds with the service period (through December 2014). At contract inception, the milestones of $5.0 million had been excluded from the transaction price, as we could not conclude that it was probable a significant reversal would not occur. Event driven milestones are a form of variable consideration as the payments are variable based on the occurrence of future events. As part of its estimation of the amount, we considered numerous factors, including that receipt of the milestones is outside of our control and contingent upon success in future clinical trials and the licensee’s efforts. Recognition of event driven milestones should be recognized when the variable consideration is able to be estimated. As of December 31, 2017, all milestones had been received, and therefore recognized.

Any consideration related to royalties will be recognized when the related sales occur as they were determined to relate predominantly to the license granted to GSK and therefore have also been excluded from the transaction price. We will re-evaluate the transaction price in each reporting period and as uncertain events are resolved or other changes in circumstances occur.

For the three and nine months ended September 30, 2018, we recognized $6.5 million and $11.9 million, respectively, in non-cash royalty revenue from GSK. For both the three and nine months ended September 30, 2017 we did not recognize any revenue from GSK.

The cumulative impact of changing the timing of revenue recognition for the GSK License and Amended GSK Supply Agreements as of January 1, 2018 was a decrease to stockholders' deficit of approximately $2.5 million and a corresponding decrease in deferred revenue of $2.5 million for the portion of the upfront fee creditable toward future royalties, as described above. This amount was included in the transition adjustment, as under ASC 606 it would have been recognized as revenue in March 2012, at the time of the amendment.

Merck Collaboration and License Agreement

During the quarter ended June 30, 2014, we entered into a collaboration and license agreement with Merck to discover and optimize fully-human antibodies against two undisclosed cancer targets using the Retrocyte Display^®. Under this agreement, Merck is responsible for the clinical development and commercialization of antibodies generated under the collaboration. There are no unsatisfied performance obligations relating to this contract. Pursuant to the XOMA Royalty Purchase Agreement, we sold to XOMA 33% of the future royalties and 10% of the future milestones that we are entitled to receive from Merck, and we remain eligible to receive from Merck approximately $85.5 million in potential payments associated with the completion of certain clinical, regulatory and commercial milestones, as well as 67% of all future royalties on worldwide product sales.

For the three months ended September 30, 2018, we did not recognize any revenue from this agreement. For the nine months ended September 30, 2018, we recognized $4.0 million in research and development revenue related to the achievement of a milestone. For both the three and nine months ended September 30, 2017, we did not recognize any revenue from this agreement.

The adoption of ASC 606 did not have an impact on the Merck collaboration and license agreement.

Incyte Collaboration Agreement

On January 9, 2015 and effective February 19, 2015, we entered into a global license, development and commercialization agreement (the “Collaboration Agreement”) with Incyte pursuant to which the parties plan to develop and commercialize novel immuno-therapeutics using our antibody discovery platforms. The Collaboration Agreement was initially focused on four checkpoint modulator programs directed at GITR, OX40, LAG-3 and TIM-3. In addition to the four identified antibody programs, the parties have an option to jointly nominate and pursue the development and commercialization of antibodies against additional targets during a five-year discovery period which, upon mutual agreement of the parties for no additional consideration, can be extended for an additional three years. In November 2015, we and Incyte jointly nominated and agreed to pursue the development and commercialization of three additional CPM targets. In February 2017, we amended the Collaboration Agreement by entering into a First Amendment to License, Development and Commercialization Agreement (the “Amendment”). See “Amendment” section below.

On January 9, 2015, we also entered into the Stock Purchase Agreement with Incyte Corporation whereby, for an aggregate purchase price of $35.0 million, Incyte purchased approximately 7.76 million shares of our common stock.

Agreement Structure

Under the terms of the Collaboration Agreement, we received non-creditable, nonrefundable upfront payments totaling $25.0 million. In addition, until the Amendment, the parties shared all costs and profits for the GITR, OX40 and two of the additional antibody programs on a 50:50 basis (profit-share products), and we were eligible to receive up to $20.0 million in future contingent development milestones under these programs. Incyte is obligated to reimburse us for all development costs that we incur in connection with the TIM-3, LAG-3 and one of the additional antibody programs (royalty-bearing products) and we are eligible to receive (i) up to $155.0 million in future contingent development, regulatory, and commercialization milestone payments and (ii) tiered royalties on global net sales at rates generally ranging from 6% to 12%. For each royalty-bearing product, we will also have the right to elect to co-fund 30% of development costs incurred following initiation of pivotal clinical trials in return for an increase in royalty rates. Additionally, we had the option to retain co-promotion participation rights in the United States on any profit-share product. Through the direction of a joint steering committee, until the Amendment, the parties anticipated that, for each program, we would serve as the lead for pre-clinical development activities through investigational new drug (“IND”) application filing, and Incyte would serve as the lead for clinical development activities. The parties initiated the first clinical trials of antibodies arising from these programs in 2016. For each additional program beyond GITR, OX40, TIM-3 and LAG-3 that the parties elect to bring into the collaboration, we will have the option to designate it as a profit-share product or a royalty-bearing product.

The Collaboration Agreement will continue as long as (i) any product is being developed or commercialized or (ii) the discovery period remains in effect. Incyte may terminate the Collaboration Agreement or any individual program for convenience upon 12 months’ notice. The Collaboration Agreement may also be terminated by either party upon the occurrence of an uncured material breach of the other party or by us if Incyte challenges patent rights controlled by us. In addition, either party may terminate the Collaboration Agreement as to any program if the other party is acquired and the acquiring party controls a competing program.

Amendment

Pursuant to the terms of the Amendment, the GITR and OX40 programs immediately converted from profit-share programs to royalty-bearing programs and we became eligible to receive a flat 15% royalty on global net sales should any candidates from either of these two programs be approved. Incyte is now responsible for global development and commercialization and all associated costs for these programs. In addition, the profit-share programs relating to TIGIT and one undisclosed target were removed from the collaboration, with the undisclosed target reverting to Incyte and TIGIT to Agenus. Should any of those programs be successfully developed by a party, the other party will be eligible to receive the same milestone payments as the royalty-bearing programs and royalties at a 15% rate on global net sales. The terms for the remaining three royalty-bearing programs targeting TIM-3, LAG-3 and one undisclosed target remain unchanged, with Incyte being responsible for global development and commercialization and all associated costs. The Amendment gives Incyte exclusive rights and all decision-making authority for manufacturing, development, and commercialization with respect to all royalty-bearing programs.

In connection with the Amendment, Incyte paid us $20.0 million in accelerated milestones related to the clinical development of the antibody candidates targeting GITR and OX40.

In February 2017, we also entered into a Stock Purchase Agreement with Incyte, pursuant to which Incyte purchased 10 million shares of our common stock at a purchase price of $6.00 per share.

Pursuant to the XOMA Royalty Purchase Agreement, we sold to XOMA 33% of the future royalties and 10% of the future milestones that we were entitled to receive from Incyte, excluding the $5.0 million milestone that we recognized in the three months ended September 30, 2018. As of September 30, 2018, we remain eligible to receive up to $450.0 million in future potential development, regulatory and commercial milestones across all programs in the collaboration, as well as 67% of all future royalties on worldwide product sales.

Collaboration Revenue

We identified the following performance obligations under the Incyte Collaboration Agreement, as amended: (1) combined license and related research and development (“R&D”) services to a GITR antibody, (2) combined license and related R&D services to an OX40 antibody, (3) combined license and related R&D services to a TIM-3 antibody, (4) combined license and related R&D services to a LAG-3 antibody, (5) combined license and related R&D services to a TIGIT antibody, (6) combined license and related R&D services to a first undisclosed target, (7) combined license and related R&D services to a second undisclosed target, and (8) the option to license certain other mutually agreed-upon antibodies combined with related R&D Services (“Assumed Project Options Development”). Each of these performance obligations consists of a license or option to a license and related R&D services through the filing of an IND for each antibody candidate.

We concluded that the licenses could be used with other readily available resources if the know-how was also transferred with the license; however, our knowledge and experience is necessary for further development of the licensed antibodies. Therefore, we determined that each of the licensed antibodies and the related developmental R&D services should be treated as a combined performance obligation. We also evaluated whether the Assumed Project Options Development was a material right. At contract inception Incyte paid us a nonrefundable access fee for the ability to exercise the option and bring additional targets into the program. Both we and Incyte have the ability to explore targets and, if mutually agreed upon, convert those targets into assumed projects for no additional license fee. We concluded that Assumed Project Options Development represents a material right and is therefore a performance obligation.

We determined that there were no significant financing components, noncash consideration, or amounts that may be refunded to the customer, and as such the total upfront fixed consideration of the $10.0 million license fee and $15.0 million project access fee would be included in the total transaction price of $25.0 million. This amount was then allocated to the performance obligations on a relative stand-alone selling price basis.

The estimated variable consideration to be recognized for developmental R&D services and related reimbursable expenses (“Development Costs”) was determined based on the forecasted amounts in the research plan that had been approved by the both parties via the joint steering committee (“JSC”). Under the Agreement, Development Costs related to Profit-Sharing products are split equally between us and Incyte. Therefore, our expected revenue is 50% of the costs of these programs. Based on review of the budgets presented at the JSC meetings, as well as costs of previous R&D projects, we expected the total development costs over the term of the contract would be $43.4 million. This amount was allocated entirely to the distinct R&D services that forms part of each performance obligation.

We determined that the transaction price of the Collaboration Agreement was $78.7 million as of September 30, 2018, an increase of $10.3 million from the transaction price of $68.4 million as of December 31, 2017. In order to determine the transaction price, we evaluated all the payments to be received during the duration of the contract. We determined that the fixed upfront license fee and project access fee of $10.0 million and $15.0 million, respectively, and the $53.7 million of actual and estimated variable consideration for development costs (including R&D services) and milestones constituted consideration to be included in the transaction price, which is allocated among the performance obligations.

For payments made to Incyte related to their work performed on profit-sharing programs, we considered that we will receive a benefit through the performance of a series of distinct R&D services by Incyte. Additionally, the R&D services are being provided by Incyte at fair value. Therefore, the amount paid to Incyte represents the fair value of the services performed, and no excess will be allocated as a reduction of the transaction price. We will record the consideration paid to Incyte in the same manner that we would purchases for other vendors, classified as R&D expense.

In summary, each of the performance obligations includes a license or option to a license, and respective R&D services that will be performed over time from program initiation through the filing of an IND with respect to each antibody candidate. We have determined that the combined performance obligation is satisfied over time, and that the input method should be applied for all performance obligations that have consideration allocated to them. The cost-cost measure will be applied based on the percentage of completion of R&D services provided during the period compared to the respective budget. We believe this is the best measure of progress because other measures do not reflect how we transfer our performance obligation to Incyte. We will recognize the fixed consideration allocated to each performance obligation over time as the related R&D services are being performed using the input of R&D costs incurred over total R&D costs expected to be incurred through IND filing, beginning on the date a license is granted. A cost-based input method of revenue recognition requires management to make estimates of costs to complete our performance obligations. In making such estimates, significant judgment is required to evaluate assumptions related to cost estimates. The cumulative effect of revisions to estimated costs to complete our performance obligations will be recorded in the period in which changes are identified and amounts can be reasonably estimated. A significant change in these assumptions and estimates could have a material impact on the timing and amount of revenue recognized in future periods.

We considered the nature of the arrangement between Incyte and us in evaluating the classification of the payments to be received under the cost-sharing arrangement. We do not currently have any commercial products available for sale. Our primary operations to date have included research and development activities, licensing intellectual property and performing R&D services for external parties. Accordingly, arrangements such as this Collaboration Agreement represent our ongoing business operations. Therefore, we have concluded that payments received from Incyte under the cost-sharing arrangement represent payments made to us as part of our on-going operations and should be classified as revenue as such amounts are earned.

For the three months ended September 30, 2018, we recognized approximately $6.3 million of research and development revenue. This amount included $0.3 million of the transaction price for the Collaboration Agreement recognized based on proportional performance, $5.0 million for the achievement of a milestone and $1.0 million for research and development services. For the three months ended September 30, 2017, we recognized approximately $3.2 million of research and development revenue.

For the nine months ended September 30, 2018, we recognized approximately $14.4 million of license and collaboration revenue. This amount included $1.1 million of the transaction price for the Collaboration Agreement recognized based on proportional performance, $10.0 million for the achievement of milestones and $3.3 million for research and development services. For the nine months ended September 30, 2017, we recognized approximately $34.0 million of research and development revenue.

We expect to recognize deferred research and development revenue of $0.3 million, $0.8 million, and $1.2 million for the remainder of 2018, 2019, and 2020, respectively, related to performance obligations that are unsatisfied or partially unsatisfied as of September 30, 2018. These amounts exclude amounts (milestones, R&D services and royalties) where we have a right to invoice the customer in the amount that corresponds directly with the value of the performance completed to date.

The cumulative impact of the adoption of ASC 606 for the Incyte Collaboration Agreement as of January 1, 2018 was a decrease to stockholders' deficit of approximately $6.4 million and a corresponding decrease in deferred revenue of $6.4 million.

Disaggregation of Revenue

The following table presents revenue (in thousands) for the three and nine months ended September 30, 2018 disaggregated by geographic region and revenue type. Revenue by geographic region is allocated based on the domicile of our respective business operations.

	Three months ended September 30, 2018
	United States		Europe		Total
Revenue Type
Research and development services	$	1,014	$	—	$	1,014
License and collaboration milestones		5,000		—		5,000
Recognition of deferred revenue		262		—		262
Non-cash royalty revenue		6,526		—		6,526
	$	12,802	$	—	$	12,802

	Nine months ended September 30, 2018
Revenue Type
Research and development services	$	3,321	$	—	$	3,321
License and collaboration milestones		10,000		4,000		14,000
Recognition of deferred revenue		1,064		—		1,064
Non-cash royalty revenue		11,948		—		11,948
	$	26,333	$	4,000	$	30,333

Contract Balances

Contract assets primarily relate to our rights to consideration for work completed in relation to our R&D services performed but not billed at the reporting date. The contract assets are transferred to the receivables when the rights become unconditional. Currently, we do not have any contract assets which have not transferred to a receivable. We had no asset impairment charges related to contract assets in the period. The contract liabilities primarily relate to contracts where we received payments but have not yet satisfied the related performance obligations. The advance consideration received from customers for R&D services or licenses bundled with other promises is a contract liability until the underlying performance obligations are transferred to the customer.

The following table provides information about contract assets and contract liabilities from contracts with customers (in thousands):

Nine months ended September 30, 2018	Balance at beginning of period		Additions		Deductions		Balance at end of period
Contract assets:
Unbilled receivables from collaboration partners	$	-	$	-	$	-	$	-
Contract liabilities:
Deferred revenue	$	3,376	$	-	$	(1,064