ACQUISITION (Details Narrative) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
	Jun. 15, 2015	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
Intangibles assets acquired	$ 3,490
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
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										7,900	7,600
Gross profit										$ 3,700	$ 4,400
Gross profit (percentage)										46.50%	57.20%
IMES [Member] | Executive Vice President [Member]
Executive base compensation	$ 300
Annual bonus based on percent of EBITDA	20.00%
Minimum EBITDA to receive annual bonus	$ 2,000
Payment Termination terms	5 years