License and Royalty Revenue - Summary of Changes in Balances of Receivables, Contract Assets and Deferred Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accounts receivable, net, current and non-current:
Balance, beginning of period	$ 46,266	$ 42,303
Additions	18,718	18,142
Deductions	(21,086)	(11,550)
Balance, end of period	43,898	48,895
Contract assets:
Balance, beginning of period	350
Additions	649	350
Deductions	(350)
Balance, end of period	649	350
Deferred revenue, current and non-current:
Balance, beginning of period	4,232	3,333
Deductions	(108)
Balance, end of period	4,124	3,333
Revenue recognized during the period from:
Amounts included in deferred revenue at beginning of period	108
Performance obligations satisfied in previous periods	$ 18,651	$ 10,379