Revenues, Recognition and Allowances - Adjustments to Gross Product Sales (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Deductions to gross Company product sales:
Revenue, net	$ 10,433	$ 13,586	$ 22,021	$ 21,033
Company product sales
Disaggregation of Revenue [Line Items]
Gross Company product sales	26,064	36,717	58,912	59,883
Deductions to gross Company product sales:
Chargebacks and billbacks	12,702	17,551	29,682	29,506
Wholesaler fees for service	426	1,604	1,785	2,746
Sales discounts and other allowances	3,220	4,537	7,134	7,467
Total reduction to gross Company product sales	16,348	23,692	38,601	39,719
Revenue, net	$ 9,716	$ 13,025	$ 20,311	$ 20,164

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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