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Long-Term Debt (Details)
$ in Millions
3 Months Ended
Jun. 30, 2021
COP ($)
Feb. 14, 2017
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
item
Long-term debt        
Less: Current portion     $ 2,656,000 $ 2,134,000
Long-term debt less current portion     247,946,000 200,856,000
Maturities of long-term debt        
Remainder of 2021     1,991,000  
2022     2,656,000  
2023     2,656,000  
2024     246,977,000  
Total     254,280,000  
Senior Notes due February 2024        
Long-term debt        
Long-term Debt     $ 250,602,000 $ 202,990,000
Second Amended Term Loan Facility        
Long-term debt        
Face amount of debt   $ 213,300,000    
Amount of term loan   $ 213,300,000    
Uncommitted accordion option multiplier of net leverage ratio | item       2.3
Prepayment of debt as a percentage of excess cash flow if lower leverage ratio is maintained     0.00%  
Second Amended Term Loan Facility | LIBOR        
Long-term debt        
Interest rate margin (as a percent)   3.50%    
Second Amended Term Loan Facility | Alternate Base Rate (ABR)        
Long-term debt        
Interest rate margin (as a percent)   2.50%    
Third Amended Term Loan Facility        
Long-term debt        
Financing costs     $ 600,000  
Aggregate principal amount     $ 50,000,000.0  
Amortization payments (in percentage)     1.00%  
Maximum period after each fiscal year for prepayment of debt     90 days  
Prepayment of debt as a percentage of excess cash flow     50.00%  
First prepayment of debt as a percentage of excess cash flow, if lower leverage ratio is maintained     25.00%  
Second prepayment of debt as a percentage of excess cash flow, if lower leverage ratio is maintained     0.00%  
Original issue discount     $ 3,000,000.0  
Additional OID incurred     2,000,000.0  
Accumulated amortization of original issue discount     2,500,000  
Deferred financing costs     700,000  
Accumulated amortization     2,600,000  
Third Amended Term Loan Facility | Maximum        
Long-term debt        
Net leverage ratio 5.00      
Third Amended Term Loan Facility | LIBOR        
Long-term debt        
Interest rate margin (as a percent)   3.50%    
Third Amended Term Loan Facility | Alternate Base Rate (ABR)        
Long-term debt        
Interest rate margin (as a percent)   2.50%    
Third Amended Term Loan facility, Revolving Facility        
Long-term debt        
Face amount of debt     30,000,000.0  
Amount of term loan     30,000,000.0  
Undrawn letters of credit $ 5.0      
Maximum percentage of aggregate amount of revolving loans and letter of credit exposure 35.00%      
Deferred financing costs     600,000  
Third Amended Term Loan facility, Revolving Facility | First Lien Net Leverage Ratio        
Long-term debt        
Debt caps amount     $ 60,000,000.0  
Third Amended Term Loan facility, Revolving Facility | 25 bps step-up at a First Lien Net Leverage Ratio        
Long-term debt        
Interest rate margin (as a percent)     0.25%  
Net leverage ratio     3.50  
Third Amended Term Loan facility, Revolving Facility | First 25 bps step-down on First Lien Net Leverage Ratio        
Long-term debt        
Interest rate margin (as a percent)     (0.25%)  
Net leverage ratio     2.50  
Third Amended Term Loan facility, Revolving Facility | Second 25 bps step-down on First Lien Net Leverage Ratio        
Long-term debt        
Interest rate margin (as a percent)     (0.25%)  
Net leverage ratio     1.50  
Third Amended Term Loan facility, Revolving Facility | LIBOR        
Long-term debt        
Interest rate margin (as a percent)     2.75%  
Third Amended Term Loan facility, Revolving Facility | LIBOR | Minimum        
Long-term debt        
Interest rate floor (as a percent)     0.00%  
Third Amended Term Loan facility, Revolving Facility | Alternate Base Rate (ABR)        
Long-term debt        
Interest rate margin (as a percent)     1.75%  
Annual commitment fee (as a percent)     0.375%  
Existing Senior Secured Term Loan B Facility        
Long-term debt        
Original issue discount     $ 4.0