Regeneron License and Collaboration Arrangement (Tables)

12 Months Ended

Dec. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Change in Company's Contract Liabilities

The following table presents changes in the Company’s contract liabilities (in thousands):

Year ended December 31, 2021	Balance at beginning of period		Additions		Additions (Deductions) (1)			Balance at end of period
Contract liability	$	13,980	$	—	$	(9,175	)	$	4,805
Year ended December 31, 2020	Balance at beginning of period		Additions		Additions (Deductions) (1)			Balance at end of period
Contract asset	$	—	$	10,000	$	(10,000	)	$	—
Contract liability	$	21,883	$	10,000	$	(17,903	)	$	13,980

(1) Deductions to contract liabilities relate to deferred revenue recognized as revenue during the reporting period.