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Additions and Returns of Product Rights - Schedule of Initial Payments and Consideration (Details) - USD ($)
1 Months Ended 9 Months Ended
Nov. 30, 2018
Sep. 30, 2020
Sep. 30, 2019
Business Acquisition [Line Items]      
Payment to acquire business upon closing   $ 0 $ 5,000,000
Vibativ      
Business Acquisition [Line Items]      
Payment to acquire business upon closing $ 20,000,000.0 20,000,000  
Cash payment during 2019 $ 5,000,000.0 5,000,000  
Fair value of contingent consideration - net sales royalty   9,182,000  
Total consideration   $ 34,182,000