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Note 1 - Organization, Basis of Presentation and Summary of Significant Accounting Policies - Components of Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 12 Months Ended
May 28, 2017
May 29, 2016
May 31, 2015
Balance [1] $ 212,350    
Other comprehensive income, net 432
Balance 228,152 212,350 [1]  
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]      
Balance    
Other comprehensive income before reclassifications, net of tax effect 432    
Amounts reclassified from OCI    
Other comprehensive income, net 432    
Balance $ 432  
[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.