License and Royalty Revenue - Summary of Changes in Allowance For Credit Losses (Detail) - Accounts Receivable [Member] $ in Thousands	9 Months Ended
Sep. 30, 2021 USD ($)
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	$ 7,678
Provision for credit losses	5,532
Ending Balance	$ 13,210

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant