Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 66,010	$ 85,705	$ 156,714	$ 172,215
U.S.
Disaggregation of Revenue [Line Items]
Revenues	57,399	75,190	136,144	150,624
U.S. | Product revenue, net
Disaggregation of Revenue [Line Items]
Revenues	56,657	75,190	135,402	150,624
U.S. | License and royalty revenues
Disaggregation of Revenue [Line Items]
Revenues	742	0	742	0
International
Disaggregation of Revenue [Line Items]
Revenues	8,611	10,515	20,570	21,591
International | Product revenue, net
Disaggregation of Revenue [Line Items]
Revenues	8,270	9,987	19,738	20,536
International | License and royalty revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 341	$ 528	$ 832	$ 1,055