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Note 7 - Debt (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 23, 2016
Feb. 26, 2017
Nov. 27, 2016
Feb. 28, 2016
Feb. 26, 2017
Feb. 28, 2016
[2]
Nov. 01, 2016
May 29, 2016
Long-term Debt   $ 48,474,000     $ 48,474,000     $ 53,845,000
Debt Issuance Costs, Net   276,000     276,000     817,000
Line of Credit, Current           $ 3,500,000 [1]
Gain (Loss) on Extinguishment of Debt   $ (1,200,000) (1,233,000)    
Payments of Debt Extinguishment Costs     233,000   $ 233,000    
Interest Rate Swap [Member] | BMO [Member]                
Derivative, Notional Amount             $ 50,000,000  
Derivative, Fixed Interest Rate             1.22%  
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member]                
Debt Instrument, Additional Borrowing Amount $ 75,000,000              
Debt Issuance Costs, Net $ 897,000              
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | Prime Rate [Member] | Minimum [Member]                
Debt Instrument, Basis Spread on Variable Rate 0.25%              
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | Prime Rate [Member] | Maximum [Member]                
Debt Instrument, Basis Spread on Variable Rate 1.25%              
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | Eurodollar [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] | Eurodollar [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] | Term Loan [Member]                
Long-term Debt $ 50,000,000              
Debt Instrument, Term 5 years              
Debt Instrument, Periodic Payment $ 1,250,000              
Debt Instrument, Interest Rate, Effective Percentage   2.97%     2.97%      
Debt Issuance Costs, Net 299,000              
Credit Agreement With JPMorgan Chase, BMO Harris Bank, and City National Bank [Member] | Revolving Credit Facility [Member]                
Line of Credit Facility, Maximum Borrowing Capacity 100,000,000              
Debt Issuance Costs, Net $ 598,000              
Line of Credit, Current   $ 0 $ 1,500,000   $ 0      
[1] Derived from audited financial statements. See Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies for discussion of accounting guidance adopted during the period.
[2] See Note 1 - Organization, Basis of Presentation, and Summary of Significant Accounting Policies for a discussion of accounting principles adopted during the period.