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Related Party Transactions (Details) - USD ($)
1 Months Ended 12 Months Ended
Feb. 05, 2016
Jan. 31, 2021
Feb. 29, 2016
Dec. 31, 2013
Feb. 28, 2013
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Related Party Transaction [Line Items]                
Payments to acquire businesses, gross           $ 6,189,000 $ 12,736,000 $ 22,951,000
Percentage of royalty payable on net sales       0.834%        
Affiliated Entity | Deerfield CSF LLC                
Related Party Transaction [Line Items]                
Percentage of royalty payable on net sales         1.75%      
Affiliated Entity | Deerfield CSF LLC | FSC                
Related Party Transaction [Line Items]                
Payments to acquire businesses, gross     $ 1,050,000          
Debt instrument, term (in years)     5 years          
Percentage of royalty payable on net sales 15.00%              
Affiliated Entity | Deerfield CSF LLC | FSC | Subsequent event                
Related Party Transaction [Line Items]                
Final payment to acquire business gross   $ 15,000,000            
Total payments to acquire business gross   $ 20,250,000            
Maximum | Affiliated Entity | Deerfield CSF LLC | FSC                
Related Party Transaction [Line Items]                
Royalty guarantees, commitments, amount $ 12,500,000              
Royalty guarantees, commitments, term (in years) 10 years