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Note 8 - Income Taxes (Details) (USD $)
3 Months Ended 9 Months Ended
Feb. 23, 2014
Feb. 24, 2013
Feb. 23, 2014
Feb. 24, 2013
May 26, 2013
Income Tax Disclosure [Abstract]          
Income Tax Expense (Benefit) $ 3,679,000 $ 2,754,000 $ 8,028,000 $ 8,238,000  
Effective Income Tax Rate Reconciliation, Percent     35.00% 31.00%  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     35.00%    
Unrecognized Tax Benefits 1,000,000   1,000,000   1.0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 827,000   $ 827,000   $ 807,000