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Note 2 - Acquisition of O Olive (Details Textual) - O Olive [Member] - USD ($)
3 Months Ended 9 Months Ended
Mar. 01, 2017
Feb. 25, 2018
Feb. 25, 2018
May 28, 2017
Payments to Acquire Businesses, Gross $ 2,500,000      
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High $ 7,500,000      
Contingent Consideration Payment Period 3 years   3 years  
Cumulative EBITDA Amount     $ 6,000,000  
Business Combination, Contingent Consideration, Liability   $ 5,400,000 5,400,000 $ 5,900,000
Finite-Lived Intangible Asset, Useful Life 11 years      
Customer Lists [Member]        
Finite-lived Intangible Assets Acquired $ 700,000      
Amortization of Intangible Assets   17,000 67,000  
Trademarks and Trade Names [Member]        
Indefinite-lived Intangible Assets Acquired $ 1,600,000      
Selling, General and Administrative Expenses [Member]        
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability     (500,000)  
Initial Potential Payment Limit [Member]        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High   4,600,000 4,600,000  
Additional Potential Payment Limit [Member]        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High   $ 2,900,000 $ 2,900,000