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Credit Facilities (Detail) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Aug. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Aug. 09, 2019
Jun. 14, 2018
Mar. 31, 2014
Mar. 27, 2014
Line of Credit Facility [Line Items]                    
Debt issuance cost               $ 1,300,000    
GECC                    
Line of Credit Facility [Line Items]                    
Line of credit facility maximum borrowing capacity                 $ 75,000,000.0 $ 75,000,000.0
Amount of credit facility outstanding   $ 0   $ 0   $ 0        
Stand by letters of credit outstanding amount   10,400,000   10,400,000   9,200,000        
Line of credit facility, total excess availability   23,600,000   $ 23,600,000   $ 41,800,000        
Rate of credit facility       0.00%   4.53%        
GECC | Wells Fargo                    
Line of Credit Facility [Line Items]                    
Stand by letters of credit outstanding amount   10,400,000   $ 10,400,000            
GECC | Letter of Credit | 4.25% Convertible Senior Notes (due 2018)                    
Line of Credit Facility [Line Items]                    
Line of credit facility maximum borrowing capacity                 $ 35,000,000.0  
Amended ABL Credit Agreement                    
Line of Credit Facility [Line Items]                    
Line of credit facility maximum borrowing capacity $ 60,000,000.0                  
Fixed charge coverage ratio 110.00%                  
Minimum liquidity requirement $ 25,000,000.0                  
Minimum availability $ 9,000,000.0                  
Amortization expense debt issuance   100,000 $ 400,000 $ 200,000 $ 400,000          
Amended ABL Credit Agreement | Minimum | London Interbank Offered Rate (LIBOR)                    
Line of Credit Facility [Line Items]                    
Applicable margin spread over base rate       1.50%            
Amended ABL Credit Agreement | Minimum | Base Rate [Member]                    
Line of Credit Facility [Line Items]                    
Applicable margin spread over base rate       0.50%            
Amended ABL Credit Agreement | Maximum | London Interbank Offered Rate (LIBOR)                    
Line of Credit Facility [Line Items]                    
Applicable margin spread over base rate       2.00%            
Amended ABL Credit Agreement | Maximum | Base Rate [Member]                    
Line of Credit Facility [Line Items]                    
Applicable margin spread over base rate       1.00%            
Term Loan Agreement | Great American Capital Partners Finance Co LLC                    
Line of Credit Facility [Line Items]                    
Debt, net amount   $ 20,000,000.0   $ 20,000,000.0       $ 20,000,000.0    
Percentage of principal amount redeemed       10.00%            
Debt issuance cost             $ 1,100,000      
Term Loan Agreement | Year One | Great American Capital Partners Finance Co LLC                    
Line of Credit Facility [Line Items]                    
Debt prepayment percentage       2.00%            
Term Loan Agreement | Year Two | Great American Capital Partners Finance Co LLC                    
Line of Credit Facility [Line Items]                    
Debt prepayment percentage       2.00%            
Term Loan Agreement | Year Three | Great American Capital Partners Finance Co LLC                    
Line of Credit Facility [Line Items]                    
Debt prepayment percentage       1.00%