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Long-Term Debt (Details)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 14, 2017
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2021
COP ($)
Dec. 31, 2020
USD ($)
item
Long-term debt            
Less: Current portion       $ 2,656,000   $ 2,134,000
Long-term debt less current portion       247,261,000   200,856,000
Deferred financing costs       500,000    
Accumulated amortization       100,000    
Maturities of long-term debt            
Remainder of 2021       664,000    
2022       2,656,000    
2023       2,656,000    
2024       246,976,000    
Total       252,952,000    
Senior Notes due February 2024            
Long-term debt            
Long-term Debt       249,917,000   $ 202,990,000
Second Amended Term Loan Facility            
Long-term debt            
Face amount of debt $ 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 $ 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       $ 2,400,000    
Additional OID incurred       2,000,000.0    
Accumulated amortization of original issue discount       3,100,000    
Deferred financing costs       600,000    
Accumulated amortization       $ 2,700,000    
Third Amended Term Loan Facility | Maximum            
Long-term debt            
Net leverage ratio       5.00 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    
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 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 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 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% 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 $ 4.0