License and Royalty Revenue - Summary of Changes in Balances of Receivables, Contract Assets and Deferred Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounts receivable, net, current and non-current:
Balance, beginning of period	$ 47,202	$ 46,494	$ 46,266	$ 42,303
Additions	30,385	100,243	71,544	137,220
Deductions	(28,840)	(21,057)	(69,063)	(53,843)
Balance, end of period	48,747	125,680	48,747	125,680
Contract assets:
Balance, beginning of period	702	350	350
Additions	407		1,109	350
Deductions			(350)
Balance, end of period	1,109	350	1,109	350
Deferred revenue, current and non-current:
Balance, beginning of period	4,025	4,457	4,232	3,333
Additions				1,124
Deductions	(99)	(113)	(306)	(113)
Balance, end of period	3,926	4,344	3,926	4,344
Revenue recognized during the period from:
Amounts included in deferred revenue at beginning of period	99	113	306
Performance obligations satisfied in previous periods	$ 30,256	$ 98,799	$ 70,603	$ 125,555