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Note 7 - Debt (Details Textual) - USD ($)
 3 Months Ended 6 Months Ended
Sep. 24, 2016
Sep. 23, 2016
Nov. 27, 2016
Nov. 29, 2015
Nov. 27, 2016
Nov. 29, 2015
 [2]
Nov. 01, 2016
May 29, 2016
Long-term Debt     $ 49,711,000   $ 49,711,000     $ 53,845,000
Debt Issuance Costs, Net     289,000   289,000     817,000
Line of Credit, Current     1,500,000   1,500,000     $ 3,500,000 [1]
Proceeds from Lines of Credit $ 1,500,000       1,500,000 $ 10,500,000    
Gain (Loss) on Extinguishment of Debt     (1,233,000) (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     $ 1,500,000   $ 1,500,000      
Line of Credit Facility, Interest Rate at Period End     2.29%   2.29%      
[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.