Revenue Recognition - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jul. 01, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Licensing revenue	$ 34,394	$ 50,212	$ 70,336	$ 98,761
Type of Revenue [Extensible List]	us-gaap:LicenseMember	us-gaap:LicenseMember	us-gaap:LicenseMember	us-gaap:LicenseMember
Contract assets, current	$ 4,924		$ 4,924			$ 4,802
Contract assets, long term	15,968		15,968			14,560
Impairment loss of contract assets	100	$ 400	600	$ 400
ASC 606
Disaggregation Of Revenue [Line Items]
Deferred revenue	3,800		3,800
ASC 606 | Other Assets – Current
Disaggregation Of Revenue [Line Items]
Contract assets, current	4,900		4,900			4,800
ASC 606 | Other Assets Noncurrent
Disaggregation Of Revenue [Line Items]
Contract assets, long term	16,000		16,000			$ 14,600
Subsequent Event
Disaggregation Of Revenue [Line Items]
Revenue, remaining performance obligation					$ 384,000
International
Disaggregation Of Revenue [Line Items]
Licensing revenue	$ 200	$ 600	$ 600	$ 2,600
Type of Revenue [Extensible List]	us-gaap:LicenseMember	us-gaap:LicenseMember	us-gaap:LicenseMember	us-gaap:LicenseMember
Cost of goods sold	$ 200	$ 600	$ 600	$ 2,500
Type of Cost, Good or Service [Extensible List]	us-gaap:SellingGeneralAndAdministrativeExpensesMember	us-gaap:SellingGeneralAndAdministrativeExpensesMember	us-gaap:SellingGeneralAndAdministrativeExpensesMember	us-gaap:SellingGeneralAndAdministrativeExpensesMember