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Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Product Information [Line Items] |  |
Net product sales | $ 20,018 | $ 25,400
Accounting Standards Update 2019-12 |  |
Product Information [Line Items] |  |
Change in accounting principle, accounting standards update, adopted | true |
Change in accounting principle, accounting standards update, immaterial effect | true |
CINVANTI |  |
Product Information [Line Items] |  |
Net product sales | $ 18,500 | 25,200
SUSTOL |  |
Product Information [Line Items] |  |
Net product sales | $ 1,500 | $ 200

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