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Assets and Liabilities Classified as Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified | Feb. 28, 2015 | May 31, 2014
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Inventories | $ 0 us-gaap_InventoriesPropertyHeldForSaleCurrent | $ 18 us-gaap_InventoriesPropertyHeldForSaleCurrent
Discontinued operations-Assets | 0 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent | 18 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent
Accrued liabilities-current | 0 us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilities | 7 us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilities
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent | 0 us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent | 130 us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent
Discontinued operations-Liabilities | $ 0 rell_TotalLiabilitiesDiscontinuedOperationCurrentAndLongterm | $ 137 rell_TotalLiabilitiesDiscontinuedOperationCurrentAndLongterm

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- Definition Total liabilities discontinued operation current and long-term. + References No definition available. + Details
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- Definition Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759 + Details
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- Definition Amount classified as accrued liabilities attributable to disposal group held for sale or disposed of. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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- Definition Amount classified as inventory attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1436-107760 + Details
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- Definition Amount classified as liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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