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Product Revenue and Reserves for Variable Consideration (Tables)
 3 Months Ended
Mar. 31, 2022
Revenue from Contract with Customer [Abstract]  
Product Revenue Allowance and Reserve Categories The following table summarizes activity in each of the product revenue allowance and reserve categories for the three months ended March 31, 2022 and 2021 (in thousands): 
 Chargebacks
and Discounts		Rebates, Fees
and other
Deductions		ReturnsTotal
Balance at December 31, 2021$1,278 $26,625 $475 $28,378 
Current provisions related to sales in current year2,711 21,324 1,359 25,394 
Adjustments related to prior year sales(132)779 — 647 
Credits/payments made(2,465)(22,491)(1,293)(26,249)
Balance at March 31, 2022$1,392 $26,237 $541 $28,170 
Balance at December 31, 2020$802 $39,912 $649 $41,363 
Current provisions related to sales in current year3,170 33,643 2,152 38,965 
Adjustments related to prior year sales3 (1,241)— (1,238)
Credits/payments made(2,646)(29,098)(1,917)(33,661)
Balance at March 31, 2021$1,329 $43,216 $884 $45,429