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The Company (Details)
6 Months Ended
Jun. 30, 2020
USD ($)
Segment
product
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Number of operating segments | Segment 1    
Number of FDA approved products | product 2    
Principal amount $ 316,250,000 $ 316,250,000  
Convertible notes      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Principal amount     $ 316,250,000
Interest rate     1.50%