CALCULATION OF EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 25, 2017	Feb. 27, 2016	Feb. 25, 2017	Feb. 27, 2016
Numerator for Basic and Diluted EPS:
Net loss	$ (1,431)	$ (2,926)	$ (6,803)	$ (6,611)
Less dividends:
Undistributed losses	(2,189)	(3,684)	(9,076)	(8,932)
Undistributed losses, diluted	$ (2,189)	$ (3,684)	$ (9,076)	$ (8,932)
Denominator for Basic and Diluted EPS:
Common shares - Diluted	12,847	12,842	12,845	13,117
Common Stock [Member]
Less dividends:
Common stock	$ 642	$ 642	$ 1,925	$ 1,973
Undistributed losses	(1,855)	(3,122)	(7,691)	(7,598)
Undistributed losses, diluted	$ (1,855)	$ (3,122)	$ (7,691)	$ (7,598)
Denominator for Basic and Diluted EPS:
Common shares - Basic	10,706	10,701	10,704	10,976
Common shares - Diluted	10,706	10,701	10,704	10,976
Net loss per share:
Total loss per Common share - Basic	$ (0.11)	$ (0.23)	$ (0.54)	$ (0.51)
Total loss per common share - Diluted	$ (0.11)	$ (0.23)	$ (0.54)	$ (0.51)
Common Class B [Member]
Less dividends:
Common stock	$ 116	$ 116	$ 348	$ 348
Undistributed losses	(334)	(562)	(1,385)	(1,334)
Undistributed losses, diluted	$ (334)	$ (562)	$ (1,385)	$ (1,334)
Denominator for Basic and Diluted EPS:
Common shares - Basic	2,141	2,141	2,141	2,141
Common shares - Diluted	2,141	2,141	2,141	2,141
Net loss per share:
Total loss per Common share - Basic	$ (0.10)	$ (0.21)	$ (0.48)	$ (0.46)
Total loss per common share - Diluted	$ (0.10)	$ (0.21)	$ (0.48)	$ (0.46)