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Debt - 2018 Credit Agreement (Details)
Dec. 13, 2018
USD ($)
Dec. 13, 2022
USD ($)
Dec. 13, 2021
USD ($)
Dec. 13, 2020
USD ($)
Dec. 13, 2019
USD ($)
Mar. 13, 2019
USD ($)
Debt Instrument [Line Items]            
Letters of credit           $ 1,300,000
Other indebtedness           200,000
2018 Credit Agreement            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 60,000,000          
Pre-funded amount held in restricted cash $ 8,400,000          
Commitment fee percentage 0.50%          
Prepayment fee percentage, year three 0.02          
Prepayment fee percentage, year four 0.01          
Minimum liquidity covenant threshold           $ 3,000,000
Coverage ratio           2.50
Medium-term Notes | 2018 Credit Agreement            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 80,000,000          
Delayed Draw Term Loan | 2018 Credit Agreement            
Debt Instrument [Line Items]            
Maximum borrowing capacity 10,000,000          
Revolver | Line of Credit | 2018 Credit Agreement            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 10,000,000          
LIBOR | 2018 Credit Agreement            
Debt Instrument [Line Items]            
Basis spread on variable rate 7.75%          
Scenario, Forecast | 2018 Credit Agreement            
Debt Instrument [Line Items]            
Periodic payment   $ 15,000,000 $ 15,000,000 $ 10,000,000 $ 10,000,000