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Consolidated Statement of Stockholders' Equity (USD $) Share data in Thousands, unless otherwise specified | Total | Common Stock | Class B Common Stock | Common Stock | Class B Common Stock | Par Value | Additional Paid-in Capital | Common Stock in Treasury | Retained Earnings | Retained Earnings Common Stock | Retained Earnings Class B Common Stock | Accumulated Other Comprehensive Income (loss)
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at May. 31, 2014 | $ 174,845,000 us-gaap_StockholdersEquity |  |  |  |  | $ 702,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = rell_ParValueMember | $ 66,141,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (14,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 97,959,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | $ 10,057,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Beginning Balance (in shares) at May. 31, 2014 |  |  |  | 11,835 us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 2,191 us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = rell_ClassBCommonStockMember |  |  |  |  |  |  |
Net income (loss) | (1,140,000)us-gaap_NetIncomeLoss |  |  |  |  |  |  |  | (1,140,000)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  |
Foreign currency translation | (3,961,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax |  |  |  |  |  |  |  |  |  |  | (3,961,000)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Fair value adjustments on investments | 25,000 us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax |  |  |  |  |  |  |  |  |  |  | 25,000 us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Share-based compensation: |  |  |  |  |  |  |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |  |  |  |  |  | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Stock options | 385,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition |  |  |  |  |  | 385,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Common stock: |  |  |  |  |  |  |  |  |  |  |  |
Options Exercised, in shares |  |  |  | 44 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |
Options Exercised | 288,000 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised |  |  |  |  | 2,000 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = rell_ParValueMember | 286,000 us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |  |
Canceled Shares |  |  |  |  | (50)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod / us-gaap_StatementClassOfStockAxis = rell_ClassBCommonStockMember |  |  |  |  |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities |  |  |  | 50 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |
Repurchase of common stock | (2,640,000)us-gaap_StockRepurchasedDuringPeriodValue |  |  |  |  |  |  | (2,640,000)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Treasury Stock, Shares, Acquired |  |  |  | (261)us-gaap_TreasuryStockSharesAcquired / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |
Treasury stock |  |  |  |  | 0 us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementClassOfStockAxis = rell_ClassBCommonStockMember | (13,000)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = rell_ParValueMember | (2,584,000)us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 2,597,000 us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  |
Stockholders' Equity, Other Shares |  |  |  | (1)us-gaap_StockholdersEquityOtherShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |  |  |  |  |
Other | (2,000)us-gaap_StockholdersEquityOther |  |  |  |  | (1,000)us-gaap_StockholdersEquityOther / us-gaap_StatementEquityComponentsAxis = rell_ParValueMember |  | 0 us-gaap_StockholdersEquityOther / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember |  |  |  | (1,000)us-gaap_StockholdersEquityOther / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Dividends paid |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared to common stock |  | (1,411,000)us-gaap_DividendsCommonStockCash / rell_CommonStockTypeAxis = us-gaap_CommonStockMember | (234,000)us-gaap_DividendsCommonStockCash / rell_CommonStockTypeAxis = rell_ClassBCommonStockMember |  |  |  |  |  |  | (1,411,000)us-gaap_DividendsCommonStockCash / rell_CommonStockTypeAxis = us-gaap_CommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (234,000)us-gaap_DividendsCommonStockCash / rell_CommonStockTypeAxis = rell_ClassBCommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
Ending Balance at Nov. 29, 2014 | $ 166,155,000 us-gaap_StockholdersEquity |  |  |  |  | $ 690,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = rell_ParValueMember | $ 64,228,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (57,000)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_TreasuryStockMember | $ 95,174,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | $ 6,120,000 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Ending Balance (in shares) at Nov. 29, 2014 |  |  |  | 11,667 us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 2,141 us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = rell_ClassBCommonStockMember |  |  |  |  |  |  |

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