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Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Product Information [Line Items] |  |  |  |
Net product sales | $ 19,965 | $ 42,624 | $ 68,033 | $ 110,885
ASU 2018-13 |  |  |  |
Product Information [Line Items] |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] | true |  | true |
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] | true |  | true |
ASU 2016-13 |  |  |  |
Product Information [Line Items] |  |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] | true |  | true |
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] | true |  | true |
Change in Accounting Principle, Accounting Standards Update, Adoption Date | Jan. 01, 2020 |  | Jan. 01, 2020 |
CINVANTI |  |  |  |
Product Information [Line Items] |  |  |  |
Net product sales | $ 19,800 | 36,400 | $ 67,600 | 97,600
SUSTOL |  |  |  |
Product Information [Line Items] |  |  |  |
Net product sales | $ 200 | $ 6,200 | $ 400 | $ 13,300

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