Revenue - Co-pay Assistance Program (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Trade Discounts, Allowances and Chargebacks
Beginning balance	$ 1,783
Provision related to current period sales	725
Changes in estimate related to prior period sales	2
Credit/payments made	(1,114)
Ending balance	1,396
Product Returns
Beginning balance	180
Changes in estimate related to prior period sales	(66)
Ending balance	114
Rebates And Incentives
Beginning balance	10,044
Provision related to current period sales	4,576
Changes in estimate related to prior period sales	93
Credit/payments made	(8,090)
Ending balance	$ 6,623