CALCULATION OF EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Aug. 27, 2016	Aug. 29, 2015
Numerator for Basic and Diluted EPS:
Net loss	$ (2,850)	$ (1,399)
Less dividends:
Undistributed losses	(3,607)	(2,205)
Undistributed losses, diluted	$ (3,607)	$ (2,205)
Denominator for Basic and Diluted EPS:
Common shares - Diluted	12,844	13,627
Common Stock [Member]
Less dividends:
Common stock	$ 641	$ 690
Undistributed losses	(3,057)	(1,888)
Undistributed losses, diluted	$ (3,057)	$ (1,888)
Denominator for Basic and Diluted EPS:
Common shares - Basic	10,703	11,486
Common shares - Diluted	10,703	11,486
Net loss per share:
Total loss per Common share - Basic	$ (0.23)	$ (0.10)
Total loss per common share - Diluted	$ (0.23)	$ (0.10)
Common Class B [Member]
Less dividends:
Common stock	$ 116	$ 116
Undistributed losses	(550)	(317)
Undistributed losses, diluted	$ (550)	$ (317)
Denominator for Basic and Diluted EPS:
Common shares - Basic	2,141	2,141
Common shares - Diluted	2,141	2,141
Net loss per share:
Total loss per Common share - Basic	$ (0.20)	$ (0.10)
Total loss per common share - Diluted	$ (0.20)	$ (0.10)