CALCULATION OF EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Aug. 29, 2015	Aug. 30, 2014
Numerator for Basic and Diluted Earnings Per Share [Abstract]
Net loss	$ (1,399)	$ (83)
Less dividends:
Common ($0.06 per share)	690	710
Class B ($0.054 per share)	116	118
Undistributed losses, basic	(2,205)	(911)
Undistributed losses, diluted	$ (2,205)	$ (911)
Denominator for Basic and Diluted Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Diluted	13,627	14,004
Common Stock [Member]
Less dividends:
Undistributed losses, basic	$ (1,888)	$ (781)
Undistributed losses, diluted	$ (1,888)	$ (781)
Denominator for Basic and Diluted Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic	11,486	11,822
Weighted Average Number of Shares Outstanding, Diluted	11,486	11,822
Earnings Per Share, Basic and Diluted [Abstract]
Earnings Per Share, Basic	$ (.10)	$ (0.01)
Earnings Per Share, Diluted	$ (0.10)	$ (0.01)
Common Class B [Member]
Less dividends:
Undistributed losses, basic	$ (317)	$ (130)
Undistributed losses, diluted	$ (317)	$ (130)
Denominator for Basic and Diluted Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic	2,141	2,182
Weighted Average Number of Shares Outstanding, Diluted	2,141	2,182
Earnings Per Share, Basic and Diluted [Abstract]
Earnings Per Share, Basic	$ (0.10)	$ (0.01)
Earnings Per Share, Diluted	$ (0.10)	$ (0.01)