Collaborations and License Agreements (Tables)

3 Months Ended

Mar. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Revenues Earned in Connection with EUSA Agreement under ASC 606

The following table summarizes the revenues earned in connection with the EUSA Agreement under ASC 606 for the three months ended March 31, 2021 and 2020 (in thousands):

		Three Months Ended March 31,
Revenue Type	Date Achieved	2021		2020
Collaboration and Licensing Revenue:
Amounts in contract liabilities at the beginning of the period:
Upfront payment	December 2015	$	98	$	98
R&D payment - EMA approval in RCC	August 2017		158		158
Milestone - UK reimbursement approval	February 2018		79		79
Milestone - German reimbursement approval	November 2018		79		79
Milestone - Spanish reimbursement approval	February 2019		79		79
		$	493	$	493
Partnership Royalties			361		291
Total		$	854	$	784

Summary of Changes in Accounts Receivable and Contract Liabilities (Deferred Revenue)

The following table summarizes changes in the Company’s accounts receivable and contract liabilities (deferred revenue) in connection with the EUSA Agreement for the three months ended March 31, 2021 (in thousands):

Contract Assets					Beginning Balance January 1, 2021		Additions		Deductions			Ending Balance March 31, 2021
Partnership receivables					$	392	$	361	$	—		$	753
					Deferred Revenue
Contract Liabilities	Transaction Price		Date Achieved	Date Paid	Beginning Balance January 1, 2021		Additions		Deductions			Ending Balance March 31, 2021
Amounts in contract liabilities at the beginning of the period:
Upfront payment	$	2,500	December 2015	December 2015	$	512	$	—	$	(98	)	$	414
R&D payment - EMA approval in RCC		4,000	August 2017	September 2017		817		—		(158	)		659
Milestone - UK reimbursement approval		2,000	February 2018	March 2018		408		—		(79	)		329
Milestone - German reimbursement    approval		2,000	November 2018	December 2018		407		—		(79	)		328
Milestone - Spanish reimbursement    approval		2,000	February 2019	May 2019		408		—		(79	)		329
Total	$	12,500			$	2,552	$	—	$	(493	)	$	2,059