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Accounting Policies - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Product Information [Line Items]        
Net product sales $ 22,443 $ 22,668 $ 42,461 $ 48,068
Accounting Standards Update 2019-12        
Product Information [Line Items]        
Change in accounting principle, accounting standards update, adopted true   true  
Change in accounting principle, accounting standards update, immaterial effect true   true  
CINVANTI        
Product Information [Line Items]        
Net product sales $ 19,700 22,600 $ 38,200 47,800
SUSTOL        
Product Information [Line Items]        
Net product sales $ 2,700 $ 100 $ 4,300 $ 300