Collaboration Agreements - Schedule of Changes in Contract Assets and Liabilities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Contract assets:
Accounts receivable, ADDITIONS	$ 3,914	[1]
Accounts receivable, DEDUCTIONS	(3,286)	[1]
Accounts receivable, BALANCE END OF PERIOD	628	[1]
Contract liabilities:
Deferred revenue, BALANCE BEGINNING OF PERIOD	62,697
Deferred revenue, DEDUCTIONS	(19,048)
Deferred revenue, BALANCE END OF PERIOD	$ 43,649

[1] Included in prepaid expenses and other current assets as shown within the consolidated balance sheets.