Collaborations and Other Arrangements - Summary of Changes in Accounts Receivable and Contract Liabilities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accounts receivable:
Accounts receivable, Balance at Beginning of Period	$ 2,130	$ 4,620
Accounts receivable, Additions	7,559	103,116
Accounts receivable, Deductions	(7,658)	(105,606)
Accounts receivable, Balance at End of Period	2,031	2,130
Contract liabilities:
Deferred revenue, Balance at Beginning of Period	73,931	28,810
Deferred revenue, Additions	84,659	87,477
Deferred revenue, Deductions	(31,355)	(42,356)
Deferred revenue, Balance at End of Period	$ 127,235	$ 73,931