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Long-Term Debt - First Lien Credit Facility (Details)
3 Months Ended 12 Months Ended
Mar. 06, 2020
USD ($)
item
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Aug. 17, 2015
USD ($)
Current maturities of long-term debt          
Long-term Debt          
Amount outstanding     $ 8,027,000    
Revolving Credit Facility          
Long-term Debt          
Long-term debt         $ 40,000
First Lien Credit Facility          
Long-term Debt          
Interest rate (as a percent)     5.50% 6.71%  
Long-term debt     $ 312,500,000 $ 312,500,000 $ 435,000
First Lien Credit Facility | Eurodollar rate          
Long-term Debt          
Applicable margin over reference rate (as a percent)     4.50%    
First Lien Credit Facility | Eurodollar rate | Minimum          
Long-term Debt          
Interest rate (as a percent)     1.00%    
First Lien Credit Facility | Base rate          
Long-term Debt          
Applicable margin over reference rate (as a percent)     3.50%    
First Lien Credit Facility | Term Loan          
Long-term Debt          
Long-term debt     $ 312,500,000 $ 312,500,000  
Senior Credit Facility          
Long-term Debt          
Interest rate (as a percent)     9.50%    
Aggregate principal amount $ 30,000        
Discount on financing costs   $ 1,400,000      
Financing costs   $ 3,215,000      
Senior Credit Facility | Term Loan          
Long-term Debt          
The number of consecutive fiscal quarters | item 4        
Senior Credit Facility | Term Loan | Minimum          
Long-term Debt          
Required EBITDA $ 25,000,000        
Ownership percentage required or loan becomes due 30.00%        
Percentage of lenders approval required for certain proposed changes to the Senior Credit Facility 50.00%        
Senior Credit Facility | Term Loan | Maximum          
Long-term Debt          
Ownership percentage sold or disposed of that would result in loan becoming due 25.00%        
Senior Credit Facility | Term Loan | Eurodollar rate          
Long-term Debt          
Applicable margin over reference rate (as a percent) 8.50%        
Senior Credit Facility | Term Loan | Base rate          
Long-term Debt          
Applicable margin over reference rate (as a percent) 7.50%        
Tricor Funds [Member] | Senior Credit Facility | Term Loan          
Long-term Debt          
Ownership percentage     37.00% 22.00%