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Credit Facilities - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2014
Mar. 31, 2019
Dec. 31, 2018
Jun. 14, 2018
Line of Credit Facility [Line Items]        
Debt issuance cost       $ 1,300,000
Amortization expense debt issuance   $ 400,000    
GECC        
Line of Credit Facility [Line Items]        
Line of credit facility maximum borrowing capacity $ 75,000,000.0 26,400,000.0 $ 40,700,000.0  
Amount of credit facility outstanding   0 7,500,000  
Stand by letters of credit outstanding amount   $ 12,800,000 $ 12,800,000  
Rate of credit facility   4.79% 3.79%  
GECC | Base Rate        
Line of Credit Facility [Line Items]        
Applicable margin spread over base rate 1.25%      
GECC | Federal Funds Purchased        
Line of Credit Facility [Line Items]        
Applicable margin spread over base rate   0.50%    
GECC | London Interbank Offered Rate (LIBOR)        
Line of Credit Facility [Line Items]        
Applicable margin spread over base rate 2.25% 1.00%    
GECC | Minimum        
Line of Credit Facility [Line Items]        
Applicable margin spread over base rate   0.25%    
GECC | Maximum        
Line of Credit Facility [Line Items]        
Applicable margin spread over base rate   0.50%    
WF Loan Agreement | Minimum        
Line of Credit Facility [Line Items]        
Fixed charge coverage ratio   125.00%    
Line of credit facility, total excess availability   $ 10,000,000    
Term Loan Agreement | Great American Capital Partners Finance Co LLC        
Line of Credit Facility [Line Items]        
Loan facility   $ 20,000,000 $ 20,000,000 $ 20,000,000
Fixed charge coverage ratio   125.00%    
Line of credit facility, total excess availability   $ 10,000,000    
Percentage of principal amount redeemed   10.00%    
Weighted average interest rate   11.50%    
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%    
Term Loan Agreement | London Interbank Offered Rate (LIBOR) | Great American Capital Partners Finance Co LLC        
Line of Credit Facility [Line Items]        
Applicable margin spread over base rate   9.00%    
4.25% Convertible Senior Notes (due 2018) | GECC | Letter of Credit        
Line of Credit Facility [Line Items]        
Loan facility $ 35,000,000