SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	May 27, 2017	Feb. 25, 2017	Nov. 26, 2016	Aug. 27, 2016	May 28, 2016	Feb. 27, 2016	Nov. 28, 2015	Aug. 29, 2015	May 27, 2017	May 28, 2016	May 30, 2015
Net sales	$ 37,359	$ 32,313	$ 33,827	$ 33,373	$ 39,568	$ 31,291	$ 34,086	$ 37,071	$ 136,872	$ 142,016	$ 136,957
Gross profit	11,987	10,692	10,964	10,240	13,388	9,750	10,435	11,262	43,883	44,835	41,138
Loss from continuing operations	(125)	(1,431)	(2,522)	(2,850)	(155)	(2,926)	(2,286)	(1,399)	(6,928)	(6,766)	(5,528)
Net loss	$ (125)	$ (1,431)	$ (2,522)	$ (2,850)	$ (155)	$ (2,926)	$ (2,286)	$ (1,399)	$ (6,928)	$ (6,766)	$ (5,559)
Common Class B [Member]
Loss from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Loss from continuing operations, basic (in dollars per share)	$ (0.01)	$ (0.10)	$ (0.18)	$ (0.20)	$ (0.01)	$ (0.21)	$ (0.16)	$ (0.10)	$ (0.49)	$ (0.47)	$ (0.36)
Loss from continuing operations, diluted (in dollars per share)	(0.01)	(0.10)	(0.18)	(0.20)	(0.01)	(0.21)	(0.16)	(0.10)	(0.49)	(0.47)	(0.36)
Net Loss
Loss per Common share - Basic:	(0.01)	(0.10)	(0.18)	(0.20)	(0.01)	(0.21)	(0.16)	(0.10)	(0.49)	(0.47)	(0.36)
Loss per Common share - Diluted	(0.01)	(0.10)	(0.18)	(0.20)	(0.01)	(0.21)	(0.16)	(0.10)	(0.49)	(0.47)	(0.36)
Common Stock [Member]
Loss from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract]
Loss from continuing operations, basic (in dollars per share)	(0.01)	(0.11)	(0.20)	(0.23)	(0.01)	(0.23)	(0.18)	(0.10)	(0.55)	(0.53)	(0.41)
Loss from continuing operations, diluted (in dollars per share)	(0.01)	(0.11)	(0.20)	(0.23)	(0.01)	(0.23)	(0.18)	(0.10)	(0.55)	(0.53)	(0.41)
Net Loss
Loss per Common share - Basic:	(0.01)	(0.11)	(0.20)	(0.23)	(0.01)	(0.23)	(0.18)	(0.10)	(0.55)	(0.53)	(0.41)
Loss per Common share - Diluted	$ (0.01)	$ (0.11)	$ (0.20)	$ (0.23)	$ (0.01)	$ (0.23)	$ (0.18)	$ (0.10)	$ (0.55)	$ (0.53)	$ (0.41)