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INVESTMENTS (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Feb. 27, 2016
Feb. 28, 2015
Feb. 27, 2016
Feb. 28, 2015
May. 30, 2015
May. 30, 2014
Investment [Line Items]            
Available for sale - equity securities $ 500   $ 500   $ 600  
Available for sale securities - gross realized gains and losses 100 $ 100        
Net unrealized holding gains included in AOCI 100 100        
Proceeds from sales of available-for-sale securities 106 $ 112 250 $ 186    
Time Deposits and Cetificate of Deposits[Member]            
Investment [Line Items]            
Investments, carrying value 10,800   10,800     $ 34,700
Investment, less than twelve months 3,500   3,500     23,700
Investment, greater than twelve months $ 7,300   $ 7,300     $ 10,900