Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 85,776	$ 88,900	$ 257,991	$ 257,103
U.S.
Disaggregation of Revenue [Line Items]
Revenues	74,650	70,255	225,274	215,829
U.S. | Product revenue, net
Disaggregation of Revenue [Line Items]
Revenues	74,650	70,255	225,274	215,829
U.S. | License and royalty revenues
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
International
Disaggregation of Revenue [Line Items]
Revenues	11,126	18,645	32,717	41,274
International | Product revenue, net
Disaggregation of Revenue [Line Items]
Revenues	10,587	18,069	31,123	39,567
International | License and royalty revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 539	$ 576	$ 1,594	$ 1,707