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Note 10 - Debt (Details) (USD $)
 12 Months Ended
Aug. 27, 2014
Aug. 28, 2013
Aug. 29, 2012
May 07, 2016
Feb. 12, 2016
Feb. 11, 2016
Nov. 20, 2015
Aug. 26, 2015
May 07, 2015
Aug. 14, 2013
Note 10 - Debt (Details) [Line Items]                    
Maintenance Costs $ 7,500,000                  
Minimum Quarterly Net Profits 1.00                  
Max Amount Oustanding at Any One Moment [Member] | Revolving Credit Facility 2013 [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Letters of Credit Outstanding, Amount                   15,000,000
Lease Adjusted Leverage Ratio Limitation Applied [Member] | Revolving Credit Facility 2013 [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Line of Credit Facility, Remaining Borrowing Capacity   5,100,000                
Credit Agreement 2013 Adjustment [Member] | Revolving Credit Facility 2013 [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Principal Amount Outstanding of Loans Held-in-portfolio 42,000,000                  
Letters of Credit Outstanding, Amount 1,100,000                  
Capital Lease Obligations 1,100,000                  
Revolving Credit Facility 2013 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Debt Instrument, Interest Rate, Stated Percentage 2.50%                  
Revolving Credit Facility 2013 [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Debt Instrument, Interest Rate, Stated Percentage 4.00%                  
Revolving Credit Facility 2013 [Member] | Minimum [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate 0.75%                  
Line of Credit Facility, Commitment Fee Percentage 0.30%                  
Revolving Credit Facility 2013 [Member] | Maximum [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate 2.25%                  
Line of Credit Facility, Commitment Fee Percentage 0.40%                  
Revolving Credit Facility 2013 [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Principal Amount Outstanding of Loans Held-in-portfolio 42,000,000                  
Letters of Credit Outstanding, Amount 1,100,000                 5,000,000
Capital Lease Obligations 1,100,000                  
Aggregate Amount Of Lender Commitments On Credit Facility   70,000,000                
Line of Credit Facility, Maximum Borrowing Capacity   49,300,000                
Federal Funds Effective Rate Plus Percentage 0.50%                  
Line of Credit Facility, Collateral $84.4                  
Debt Service Coverage Ratio       1.50   1.25     1.10  
Lease Adjusted Leverage Ratio       4.75 5.00   5.25 5.50 5.75  
Interest Expense, Debt 1,600,000 900,000 900,000              
Interest Paid 1,400,000 800,000 800,000              
Interest Costs Capitalized 0 0 0              
Credit Agreement 2013 [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity   90,000,000                
Maximum [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Capital Expenditures 25,000,000                  
Operations Discontinued [Member]
                    
Note 10 - Debt (Details) [Line Items]                    
Interest Expense, Debt $ 0 $ 0 $ 0