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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 |  |  |

X
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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