Revenue from Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 88,544	$ 85,776	$ 245,258	$ 257,991
U.S.
Disaggregation of Revenue [Line Items]
Revenues	77,475	74,650	213,619	225,274
U.S. | Product revenue, net
Disaggregation of Revenue [Line Items]
Revenues	73,080	74,650	208,482	225,274
U.S. | License and royalty revenues
Disaggregation of Revenue [Line Items]
Revenues	4,395	0	5,137	0
International
Disaggregation of Revenue [Line Items]
Revenues	11,069	11,126	31,639	32,717
International | Product revenue, net
Disaggregation of Revenue [Line Items]
Revenues	10,581	10,587	30,319	31,123
International | License and royalty revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 488	$ 539	$ 1,320	$ 1,594