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Long Term Debt - Term Loan Balances (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Jun. 10, 2019
Debt Instrument [Line Items]      
Long term debt $ 50,000    
Current portion      
Long-term debt 0 $ 3,750  
Long-term      
Long-term debt 47,697 61,906  
Term Loan | Hayfin Loan Agreement Term Loan      
Debt Instrument [Line Items]      
Outstanding principal 50,000    
Deferred financing costs (1,996)    
Original issue discount (307)    
Long term debt $ 47,697    
Term Loan | BT Loan Agreement      
Debt Instrument [Line Items]      
Original issue discount     $ (2,300)
Current portion      
Outstanding principal   3,750  
Original issue discount   0  
Deferred financing cost   0  
Long-term debt   3,750  
Long-term      
Outstanding principal   69,375  
Original issue discount   (1,890)  
Deferred financing cost   (5,579)  
Long-term debt   $ 61,906