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Note 11 - Subsequent Events (Details Textual) - USD ($)
3 Months Ended
Sep. 23, 2016
Nov. 27, 2016
Aug. 28, 2016
May 29, 2016
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | JPMorgan Chase [Member] | Subsequent Event [Member]        
Debt Agreement, Maximum Borrowing Capacity $ 62,500,000      
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | Bank of Montreal [Member] | Subsequent Event [Member]        
Debt Agreement, Maximum Borrowing Capacity 62,500,000      
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | City National [Member] | Subsequent Event [Member]        
Debt Agreement, Maximum Borrowing Capacity $ 25,000,000      
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | Subsequent Event [Member] | Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]        
Debt Instrument, Basis Spread on Variable Rate 1.25%      
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | Subsequent Event [Member] | Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]        
Debt Instrument, Basis Spread on Variable Rate 2.25%      
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | Subsequent Event [Member] | Term Loan [Member]        
Long-term Debt $ 50,000,000      
Debt Instrument, Term 5 years      
Debt Amortization, Term 10 years      
Debt Instrument, Prepayment Penalty $ 0      
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | Subsequent Event [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility, Maximum Borrowing Capacity 100,000,000      
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | Subsequent Event [Member]        
Debt Agreement, Maximum Borrowing Capacity $ 150,000,000      
Scenario, Forecast [Member]        
Write off of Deferred Debt Issuance Cost   $ 1,200,000    
Long-term Debt     $ 51,996,000 $ 53,845,000