License, Collaboration and Other Significant Agreements - Changes in Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Contract liabilities:
Balance at End of Period	$ 47,034
Accounts receivable
Contract assets:
Balance at Beginning of Period	19,094	$ 3,045
Additions	94,515	64,676
Deductions	(111,708)	(48,627)
Balance at End of Period	1,901	19,094
Prepaid expenses and other current assets
Contract assets:
Balance at Beginning of Period	4,309	1,722
Additions	9,550	2,592
Deductions	(13,078)	(5)
Balance at End of Period	781	4,309
Deferred revenue
Contract liabilities:
Balance at Beginning of Period	42,380	40,559
Additions	70,044	83,491
Deductions	(65,390)	(81,670)
Balance at End of Period	47,034	42,380
Accounts payable
Contract liabilities:
Balance at Beginning of Period	3,171	7,227
Additions	0	3,171
Deductions	(3,171)	(7,227)
Balance at End of Period	0	3,171
Accrued expenses and other current liabilities
Contract liabilities:
Balance at Beginning of Period	$ 0	10,000
Additions		0
Deductions		(10,000)
Balance at End of Period		$ 0