SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 02, 2018	Mar. 03, 2018	Dec. 02, 2017	Sep. 02, 2017	May 27, 2017	Feb. 25, 2017	Nov. 26, 2016	Aug. 27, 2016	Jun. 02, 2018	May 27, 2017	May 28, 2016
Net sales	$ 45,490	$ 41,645	$ 39,082	$ 36,995	$ 37,359	$ 32,313	$ 33,827	$ 33,373	$ 163,212	$ 136,872	$ 142,016
Gross profit	15,493	14,067	13,374	12,148	11,987	10,692	10,964	10,240	55,082	43,883	44,835
(Loss) income from continuing operations	1,739	527	172	(112)	(125)	(1,431)	(2,522)	(2,850)	2,326	(6,928)	(6,766)
Income from discontinued operations			1,496						1,496
Net (loss) income	$ 1,739	$ 527	$ 1,668	$ (112)	$ (125)	$ (1,431)	$ (2,522)	$ (2,850)	$ 3,822	$ (6,928)	$ (6,766)
Common Class B [Member]
(Loss) income from continuing operations
Loss from continuing operations, basic (in dollars per share)	$ 0.12	$ 0.04	$ 0.01	$ (0.01)					$ 0.16	$ (0.49)	$ (0.47)
Loss from continuing operations, diluted (in dollars per share)	0.12	0.04	0.01	(0.01)					0.16	(0.49)	(0.47)
Income from discontinued operations
Loss from discontinuing operations, basic (in dollars per share)	0.00	0.00	0.11	0.00					0.11
Loss from discontinuing operations, diluted (in dollars per share)	0.00	0.00	0.11	0.00					0.11
Net Loss
Loss per Common share - Basic	0.12	0.04	0.12	(0.01)	$ (0.01)	$ (0.10)	$ (0.18)	$ (0.20)	0.27	(0.49)	(0.47)
Loss per Common share - Diluted	0.12	0.04	0.12	(0.01)	(0.01)	(0.10)	(0.18)	(0.20)	0.27	(0.49)	(0.47)
Common Stock [Member]
(Loss) income from continuing operations
Loss from continuing operations, basic (in dollars per share)	0.14	0.04	0.01	(0.01)					0.18	(0.55)	(0.53)
Loss from continuing operations, diluted (in dollars per share)	0.14	0.04	0.01	(0.01)					0.18	(0.55)	(0.53)
Income from discontinued operations
Loss from discontinuing operations, basic (in dollars per share)	0.00	0.00	0.12	0					0.12
Loss from discontinuing operations, diluted (in dollars per share)	0.00	0.00	0.12	0					0.12
Net Loss
Loss per Common share - Basic	0.14	0.04	0.13	(0.01)	(0.01)	(0.11)	(0.20)	(0.23)	0.30	(0.55)	(0.53)
Loss per Common share - Diluted	$ 0.14	$ 0.04	$ 0.13	$ (0.01)	$ (0.01)	$ (0.11)	$ (0.20)	$ (0.23)	$ 0.30	$ (0.55)	$ (0.53)