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Additions and Returns of Product Rights - Dissolution Payments (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Business Acquisition [Line Items]    
Revenues $ 10,537,159 $ 8,330,734
Costs of products sold 2,417,329 1,634,181
Selling, Marketing and other 3,787,340 3,707,676
Clinigen    
Business Acquisition [Line Items]    
Revenues 495,410 818,273
Costs of products sold 0 0
Selling, Marketing and other 0 0
Income from discontinued operations $ 495,410 $ 818,273