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Accounting Policies - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Product Information [Line Items]        
Net product sales $ 22,668 $ 36,659 $ 48,068 $ 68,261
CINVANTI        
Product Information [Line Items]        
Net product sales 22,600 33,200 47,800 61,200
SUSTOL        
Product Information [Line Items]        
Net product sales $ 100 $ 3,500 $ 300 $ 7,100