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Long Term Debt - Term Loan (Details)
3 Months Ended 6 Months Ended 12 Months Ended 24 Months Ended 48 Months Ended
Jul. 02, 2020
USD ($)
Apr. 24, 2020
USD ($)
Apr. 22, 2020
USD ($)
Jun. 10, 2019
USD ($)
Dec. 31, 2020
USD ($)
Jun. 30, 2021
Dec. 31, 2020
USD ($)
Jul. 02, 2023
Jul. 02, 2022
Dec. 31, 2021
Jul. 02, 2021
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Jul. 02, 2025
Jul. 02, 2025
Debt Instrument [Line Items]                                
Loss on extinguishment of debt         $ 8,200,000             $ 8,201,000 $ 0 $ 0    
Paycheck Protection Program Loan                                
Debt Instrument [Line Items]                                
Proceeds from short-term debt   $ 10,000,000.0                            
Term Loan | Hayfin Loan Agreement Term Loan                                
Debt Instrument [Line Items]                                
Face value of debt $ 50,000,000.0                              
Original issue discount         307,000   $ 307,000         $ 307,000        
Term Loan | Hayfin Loan Agreement Term Loan | London Interbank Offered Rate (LIBOR)                                
Debt Instrument [Line Items]                                
Debt instrument, interest rate, floor (percent) 1.50%                              
Basis spread on variable rate 6.75%                              
Default interest rate (percent) 3.00%                              
Interest rate at issuance (percent)                       8.30%        
Term Loan | Hayfin Loan Agreement Term Loan | Federal Funds Rate                                
Debt Instrument [Line Items]                                
Basis spread on variable rate 6.75%                              
Term Loan | Hayfin Loan Agreement Delayed Draw Term Loan                                
Debt Instrument [Line Items]                                
Face value of debt $ 25,000,000.0                              
Total net leverage ratio 3.5                              
Additional commitment fee (percent) 1.00%                              
Term Loan | Financing Transactions                                
Debt Instrument [Line Items]                                
Face value of debt $ 100,000,000.0                              
Term Loan | Credit Facilities                                
Debt Instrument [Line Items]                                
Total net leverage ratio             5.0                  
Minimum liquidity 10,000,000                              
Original issue discount 500,000                              
Deferred financing costs $ 3,253,000                              
Term Loan | BT Loan Agreement                                
Debt Instrument [Line Items]                                
Face value of debt       $ 75,000,000.0                        
Fair value of term loan         $ 52,800,000   $ 52,800,000         $ 52,800,000        
Quarterly installments       900,000                        
Original issue discount       2,300,000                        
Deferred financing costs       $ 6,700,000                        
Term Loan | Amended Term Loan Agreement                                
Debt Instrument [Line Items]                                
Deferred financing costs     $ 700,000                          
Term Loan | Amended Term Loan Agreement | London Interbank Offered Rate (LIBOR)                                
Debt Instrument [Line Items]                                
Basis spread on variable rate     9.00%                          
Increase in interest rate (percent)     1.00%                          
Forecast | Term Loan | Credit Facilities                                
Debt Instrument [Line Items]                                
Total net leverage ratio                               4.0
Prepayment penalty as percent of prepaid principal               1.00% 2.00%           0.00%  
Subsequent Event | Forecast | Term Loan | Hayfin Loan Agreement Term Loan, Total Net Leverage Ratio Greater than 2.0x | London Interbank Offered Rate (LIBOR)                                
Debt Instrument [Line Items]                                
Basis spread on variable rate                   6.75%            
Subsequent Event | Forecast | Term Loan | Hayfin Loan Agreement Term Loan, Total Net Leverage Ratio Less than 2.0x but Greater than or Equal to 1.0x | London Interbank Offered Rate (LIBOR)                                
Debt Instrument [Line Items]                                
Basis spread on variable rate                   6.50%            
Subsequent Event | Forecast | Term Loan | Hayfin Loan Agreement Term Loan, Total Net Leverage Ratio Less than 1.0x | London Interbank Offered Rate (LIBOR)                                
Debt Instrument [Line Items]                                
Basis spread on variable rate                   6.00%            
Total net leverage ratio                   1.0            
Subsequent Event | Forecast | Term Loan | Credit Facilities                                
Debt Instrument [Line Items]                                
Total net leverage ratio           4.5                    
Prepayment penalty as percent of prepaid principal                     5.00%          
Debt instrument, prepayment make-whole premium as percent of prepaid principal, plus accrued interest (percent)                     102.00%          
Minimum | Term Loan | Hayfin Loan Agreement Term Loan | Prime Rate                                
Debt Instrument [Line Items]                                
Basis spread on variable rate 0.50%                              
Minimum | Subsequent Event | Forecast | Term Loan | Hayfin Loan Agreement Term Loan, Total Net Leverage Ratio Less than 2.0x but Greater than or Equal to 1.0x | London Interbank Offered Rate (LIBOR)                                
Debt Instrument [Line Items]                                
Total net leverage ratio                   1.0            
Maximum | Term Loan | Hayfin Loan Agreement Term Loan | Federal Funds Rate                                
Debt Instrument [Line Items]                                
Basis spread on variable rate 2.50%                              
Maximum | Subsequent Event | Forecast | Term Loan | Hayfin Loan Agreement Term Loan, Total Net Leverage Ratio Greater than 2.0x | London Interbank Offered Rate (LIBOR)                                
Debt Instrument [Line Items]                                
Total net leverage ratio                   2.0            
Maximum | Subsequent Event | Forecast | Term Loan | Hayfin Loan Agreement Term Loan, Total Net Leverage Ratio Less than 2.0x but Greater than or Equal to 1.0x | London Interbank Offered Rate (LIBOR)                                
Debt Instrument [Line Items]                                
Total net leverage ratio                   2.0