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Line of Credit (Details) - Wells Fargo Bank, N.A. - Line of Credit
3 Months Ended 9 Months Ended
May 26, 2016
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Debt instrument, term (in years) 5 years    
Line of credit, maximum borrowing capacity $ 75,000,000.0    
Outstanding line of credit   $ 0 $ 0
Deferred finance costs incurred   700,000 700,000
Unused portion commitment fee 0.25%    
Unused portion commitment fee, value   $ 16,000 $ 16,000
Maximum percentage under commitments of line of credit 12.50%    
Covenant, liquidity amount $ 9,375,000.000    
Fixed charge coverage ratio 1.0    
Maximum liquidity percentage 50.00%    
Letter of Credit [Member]      
Line of Credit Facility [Line Items]      
Line of credit, maximum borrowing capacity $ 25,000,000.0    
Swing Loan      
Line of Credit Facility [Line Items]      
Line of credit, maximum borrowing capacity $ 7,500,000.0    
Federal Funds Rate | Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Basis spread on variable rate 0.50%    
LIBOR | Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Basis spread on variable rate 1.00%