SIGNIFICANT ACCOUNTING POLICIES AND DISCLOSURES (Details 6) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	May 27, 2017	May 28, 2016	May 30, 2015	May 31, 2014
Stock Options [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding, Number	1,073	1,019	1,137	1,065
Options, Outstanding, Weighted Average Exercise Price	$ 9.38	$ 9.93	$ 10.35	$ 10.37
Options, Outstanding, Weighted Average Remaining Contractual Term	6 years
Options, Outstanding, Intrinsic Value	$ 85
Options, Vested, Number of Shares	628
Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 10.21
Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	4 years 4 months 24 days
Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 68
$5.03 to $8.58 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding, Number	429
Options, Outstanding, Weighted Average Exercise Price	$ 6.28
Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 6 months
Options, Outstanding, Intrinsic Value	$ 85
Options, Vested, Number of Shares	168
Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 5.84
Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	2 years 7 months 6 days
Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	$ 68
$9.48 to $11.14 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding, Number	350
Options, Outstanding, Weighted Average Exercise Price	$ 10.50
Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 8 months 12 days
Options, Vested, Number of Shares	184
Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 10.62
Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	6 years 6 months
$11.50to $13.76 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options, Outstanding, Number	294
Options, Outstanding, Weighted Average Exercise Price	$ 12.55
Options, Outstanding, Weighted Average Remaining Contractual Term	4 years 3 months 18 days
Options, Vested, Number of Shares	276
Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 12.60
Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	4 years 2 months 12 days