Collaborations (Tables)

3 Months Ended

Mar. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Change in Accounts Receivable, Contract Asset and Liabilities

The following table presents the changes in accounts receivable, contract assets and contract liabilities for the three months ended March 31, 2022 (in thousands):

	Balance at December 31, 2021		Additions		Deductions			Balance at March 31, 2022
Accounts receivable and contract assets:
Billed receivables - Sanofi	$	—	$	135	$	(135	)	$	—
Unbilled receivables - Sanofi		135		1,263		(135	)		1,263
Total accounts receivable and contract assets	$	135	$	1,398	$	(270	)	$	1,263
Contract liabilities:
Deferred revenue - Vertex	$	19,212	$	—	$	(2,981	)	$	16,231
Deferred revenue - Sanofi		81,822		1,263		(6,641	)		76,444
Total contract liabilities	$	101,034	$	1,263	$	(9,622	)	$	92,675