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Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Commercial rebates, fees and returns $ 106,367 $ 124,730
Manufacturing costs 8,778 21,364
Salaries, bonuses, and other compensation 13,121 18,693
Professional, license, and other fees and expenses 12,403 13,392
Research and development expense 865 3,539
Interest expense 3,467 867
Restructuring expense 1,596 797
Total accrued expenses $ 146,597 $ 183,382