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INCOME TAXES (Details 4) - USD ($) $ in Thousands | 12 Months Ended
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May 27, 2017 | May 28, 2016
Unrecognized Tax Benefits, beginning of period |  | $ 2,000 | $ 2,000
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions |  | 75 | 299
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities |  | (75) |
Unrecognized Tax Benefits, Decrease related to the expiration of statute of limitations |  | (117) | (299)
Unrecognized Tax Benefits, end of period |  | 1,883 | 2,000
Continuing Operations [Member] |  |  |
Unrecognized Tax Benefits, beginning of period |  | 117 |
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities |  |  |
Unrecognized Tax Benefits, end of period |  |  | 117
Discontinued Operations [Member] |  |  |
Unrecognized Tax Benefits, beginning of period | [1] | 1,883 |
Unrecognized Tax Benefits, end of period | [1] | $ 1,883 | $ 1,883
[1] | Relates to an amended Illinois state income tax return related to the sale of RFPD.

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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