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Calculation of Earnings Per Share - Additional Information (Detail) | 3 Months Ended | 9 Months Ended
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Feb. 28, 2015 | Mar. 01, 2014 | Feb. 28, 2015 | Mar. 01, 2014
Computation Of Earnings Per Share Line Items |  |  |  |
Common stock options anti-dilutive | 886,064 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 512,064 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 726,564 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 512,064 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Common Stock |  |  |  |
Computation Of Earnings Per Share Line Items |  |  |  |
Common stock shares, authorized | 17,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  | 17,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |
Class B Common Stock |  |  |  |
Computation Of Earnings Per Share Line Items |  |  |  |
Common stock shares, authorized | 3,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |  | 3,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |
Number of votes for Class B common stock |  |  | 10 rell_NumberOfVotesForClassBCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |
Cash dividends Class A common stock |  |  | 90.00%rell_CashDividendsClassCommonStockPercentage / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember |

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- Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 + Details
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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