ACQUISITION (Details Narrative) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
	Jun. 15, 2015	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
Intangibles assets acquired	$ 3,490
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
Trade Names [Member]
Intangibles assets acquired	$ 600
Finite lived intangible asset useful life	3 years
Customer Relationships [Member]
Intangibles assets acquired	$ 2,500
Finite lived intangible asset useful life	20 years
Non-compete Agreements [Member]
Intangibles assets acquired	$ 200
Finite lived intangible asset useful life	5 years
Technology [Member]
Intangibles assets acquired	$ 200
Finite lived intangible asset useful life	10 years
IMES [Member]
Purchase price	$ 12,200
Net sales										8,200	7,900	7,600
Gross profit										$ 3,500	$ 3,700	$ 4,400
Gross profit (percentage)										42.30%	46.50%	57.20%
IMES [Member] | Executive Vice President [Member]
Executive base compensation	300
Minimum EBITDA to receive annual bonus	$ 2,000
Payment Termination terms	5 years
Annual salary		$ 150								$ 150