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Credit Facilities (Details)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 02, 2021
USD ($)
Aug. 31, 2019
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Aug. 09, 2019
USD ($)
Jun. 14, 2018
USD ($)
Mar. 31, 2014
USD ($)
Mar. 27, 2014
USD ($)
General Electric Capital Corporation Loan Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Line of Credit Facility, Maximum Borrowing Capacity                   $ 75,000,000.0 $ 75,000,000.0
Line of Credit, Current                    
Letters of Credit Outstanding, Amount             10,800,000        
Line of Credit Facility, Remaining Borrowing Capacity             $ 37,300,000        
Line of Credit Facility, Interest Rate During Period                  
Amended ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Line of Credit Facility, Maximum Borrowing Capacity   $ 60,000,000.0                  
Fixed Charge Coverage Ratio   1.0                  
Debt Instrument, Covenant Compliance, Minimum Liquidity   $ 25,000,000.0                  
Debt Instrument, Covenant Compliance, Minimum Availability   $ 9,000,000.0                  
Debt Issuance Costs, Gross               $ 1,100,000      
Amortization of Debt Issuance Costs     $ 100,000 $ 100,000 $ 200,000 $ 200,000          
JPMorgan ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Line of Credit Facility, Maximum Borrowing Capacity $ 67,500,000                    
Line of Credit, Current                  
Letters of Credit Outstanding, Amount     11,000,000.0   11,000,000.0            
Line of Credit Facility, Remaining Borrowing Capacity     53,400,000   53,400,000            
Debt Issuance Costs, Gross     1,500,000   1,500,000            
Amortization of Debt Issuance Costs         24,742            
Minimum [Member] | Amended ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Fixed Charge Coverage Ratio   1.1                  
Minimum [Member] | JPMorgan ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Fixed Charge Coverage Ratio 1.1                    
Maximum [Member] | JPMorgan ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Fixed Charge Coverage Ratio 1.0                    
4.25% Convertible Senior Notes (due 2018) [Member] | General Electric Capital Corporation Loan Agreement [Member] | Letter of Credit [Member]                      
Credit Facilities (Details) [Line Items]                      
Line of Credit Facility, Maximum Borrowing Capacity                   $ 35,000,000.0  
JPMorgan [Member] | JPMorgan ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Letters of Credit Outstanding, Amount     11,000,000.0   11,000,000.0            
Gacp Finance Co LLC [Member] | Term Loan Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Long-term Line of Credit     $ 20,000,000.0   $ 20,000,000.0       $ 20,000,000.0    
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed         10.00%            
Gacp Finance Co LLC [Member] | Year One [Member] | Term Loan Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Redemption Price, Percentage         2.00%            
Gacp Finance Co LLC [Member] | Year Two [Member] | Term Loan Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Redemption Price, Percentage         2.00%            
Gacp Finance Co LLC [Member] | Year Three [Member] | Term Loan Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Redemption Price, Percentage         1.00%            
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Amended ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate         1.50%            
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | JPMorgan ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate 1.50%                    
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Amended ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate         2.00%            
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | JPMorgan ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate 2.00%                    
Base Rate [Member] | Minimum [Member] | Amended ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate         0.50%            
Base Rate [Member] | Minimum [Member] | JPMorgan ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate 0.50%                    
Base Rate [Member] | Maximum [Member] | Amended ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate         1.00%            
Base Rate [Member] | Maximum [Member] | JPMorgan ABL Credit Agreement [Member]                      
Credit Facilities (Details) [Line Items]                      
Debt Instrument, Basis Spread on Variable Rate 1.00%