License, Collaboration and Other Significant Agreements - Changes in Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Contract liabilities:
Balance at End of Period	$ 48,343
Accounts receivable
Contract assets:
Balance at Beginning of Period	19,094	$ 3,045
Additions	92,146	18,884
Deductions	(54,614)	(19,112)
Balance at End of Period	56,626	2,817
Prepaid expenses and other current assets
Contract assets:
Balance at Beginning of Period	4,309	1,722
Additions	9,550	211
Deductions	(4,309)	(5)
Balance at End of Period	9,550	1,928
Deferred revenue
Contract liabilities:
Balance at Beginning of Period	42,380	40,559
Additions	65,042	36,679
Deductions	(59,079)	(48,770)
Balance at End of Period	48,343	28,468
Accounts payable
Contract liabilities:
Balance at Beginning of Period	3,171	7,227
Additions	0	0
Deductions	(3,171)	(7,227)
Balance at End of Period	0	0
Accrued expenses and other current liabilities
Contract liabilities:
Balance at Beginning of Period	0	10,000
Additions	0	0
Deductions	0	0
Balance at End of Period	$ 0	$ 10,000