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Operating Results by Segment (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 29, 2014 | Nov. 30, 2013 | Nov. 29, 2014 | Nov. 30, 2013
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | $ 33,841 us-gaap_SalesRevenueNet | $ 35,436 us-gaap_SalesRevenueNet | $ 68,540 us-gaap_SalesRevenueNet | $ 69,693 us-gaap_SalesRevenueNet
Gross Profit | 10,462 us-gaap_GrossProfit | 11,007 us-gaap_GrossProfit | 21,120 us-gaap_GrossProfit | 21,199 us-gaap_GrossProfit
EDG |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | 26,787 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_ElectronDeviceGroupMember | 26,163 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_ElectronDeviceGroupMember | 54,225 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_ElectronDeviceGroupMember | 51,642 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_ElectronDeviceGroupMember
Gross Profit | 8,537 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_ElectronDeviceGroupMember | 8,507 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_ElectronDeviceGroupMember | 17,223 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_ElectronDeviceGroupMember | 16,366 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_ElectronDeviceGroupMember
Canvys |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | 5,906 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_CanvysMember | 7,591 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_CanvysMember | 11,874 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_CanvysMember | 15,037 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_CanvysMember
Gross Profit | 1,653 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_CanvysMember | 2,053 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_CanvysMember | 3,309 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_CanvysMember | 4,025 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_CanvysMember
Healthcare [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net Sales | 1,148 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_HealthcareMember | 1,682 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_HealthcareMember | 2,441 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_HealthcareMember | 3,014 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = rell_HealthcareMember
Gross Profit | $ 272 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_HealthcareMember | $ 447 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_HealthcareMember | $ 588 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_HealthcareMember | $ 808 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = rell_HealthcareMember

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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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