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Earnings Per Share (Detail) (USD $) | 3 Months Ended | 6 Months Ended
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Nov. 29, 2014 | Nov. 30, 2013 | Nov. 29, 2014 | Nov. 30, 2013
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Income from continuing operations | $ (1,144,000)us-gaap_IncomeLossFromContinuingOperations | $ 631,000 us-gaap_IncomeLossFromContinuingOperations | $ (1,227,000)us-gaap_IncomeLossFromContinuingOperations | $ 2,610,000 us-gaap_IncomeLossFromContinuingOperations
Income (loss) from discontinued operations, net of tax | 87,000 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (107,000)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 87,000 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | (118,000)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Net income (loss) | (1,057,000)us-gaap_NetIncomeLoss | 524,000 us-gaap_NetIncomeLoss | (1,140,000)us-gaap_NetIncomeLoss | 2,492,000 us-gaap_NetIncomeLoss
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 666,564 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 512,064 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 661,564 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 487,064 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Net income (loss) |  |  |  |
Denominator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Weighted average shares, basic (in shares) | 11,770,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 11,871,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 11,797,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 11,997,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Weighted average shares, diluted (in shares) | 11,770,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 14,185,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 11,797,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 14,433,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Weighted average shares and shares under if-coverted method for diluted EPS, basic (in shares) | $ (0.08)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.05 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ (0.09)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.19 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Weighted average shares and shares under if-coverted method for diluted EPS, diluted (in shares) | $ (0.08)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.04 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ (0.09)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.18 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, basic (in dollars per share) | $ (0.07)us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.04 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ (0.08)us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.18 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Net income per share, diluted (in dollars per share) | $ (0.07)us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.03 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ (0.08)us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.17 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Class B Common Stock |  |  |  |
Denominator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Weighted average shares, basic (in shares) | 2,141,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,191,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,161,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,309,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Weighted average shares, diluted (in shares) | 2,141,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,191,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,161,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 2,309,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Weighted average shares and shares under if-coverted method for diluted EPS, basic (in shares) | $ (0.07)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.04 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ (0.08)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.17 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Weighted average shares and shares under if-coverted method for diluted EPS, diluted (in shares) | $ (0.07)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.04 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ (0.08)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.17 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, basic (in dollars per share) | $ (0.06)us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.03 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ (0.07)us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.16 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Net income per share, diluted (in dollars per share) | $ (0.06)us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.03 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ (0.07)us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.16 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Basic |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Undistributed basic earnings (losses) | (1,874)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember | (304)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember | (2,785)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember | 807 us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember
Net income (loss) | (1,057)us-gaap_NetIncomeLoss / rell_EarningsTypeAxis = rell_BasicMember | 524 us-gaap_NetIncomeLoss / rell_EarningsTypeAxis = rell_BasicMember | (1,140)us-gaap_NetIncomeLoss / rell_EarningsTypeAxis = rell_BasicMember | 2,492 us-gaap_NetIncomeLoss / rell_EarningsTypeAxis = rell_BasicMember
Basic | Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 701 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 710 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 1,411 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 1,433 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Undistributed basic earnings (losses) | (1,610)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | (261)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | (2,391)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 688 us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Denominator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Weighted average shares, basic (in shares) | 11,770 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 11,871 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 11,797 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 11,997 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, basic (in dollars per share) | $ (0.07)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.04 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ (0.08)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.18 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Basic | Class B Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 116 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 118 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 234 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 252 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Undistributed basic earnings (losses) | (264)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | (43)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | (394)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 119 us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Denominator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Weighted average shares and shares under if-coverted method for diluted EPS, basic (in shares) | $ 2,141 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 2,191 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 2,161 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 2,309 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, basic (in dollars per share) | $ (0.06)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.03 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ (0.07)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.16 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Basic | Continuing Operations |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Income from continuing operations | (1,144)us-gaap_IncomeLossFromContinuingOperations / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 631 us-gaap_IncomeLossFromContinuingOperations / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (1,227)us-gaap_IncomeLossFromContinuingOperations / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 2,610 us-gaap_IncomeLossFromContinuingOperations / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Undistributed basic earnings (losses) | (1,961)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (197)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (2,872)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 925 us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Basic | Continuing Operations | Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 701 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 710 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 1,411 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 1,433 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Undistributed basic earnings (losses) | (1,685)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (169)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (2,466)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 788 us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, basic (in dollars per share) | $ (0.08)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 0.05 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ (0.09)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 0.19 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Basic | Continuing Operations | Class B Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 116 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 118 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 234 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 252 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Undistributed basic earnings (losses) | (276)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (28)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (406)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 137 us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, basic (in dollars per share) | $ (0.07)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 0.04 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ (0.08)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 0.17 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Basic | Discontinued Operations |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Undistributed basic earnings (losses) | (730)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (935)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (1,558)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (1,803)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Income (loss) from discontinued operations, net of tax | 87 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (107)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 87 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (118)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Basic | Discontinued Operations | Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 701 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 710 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 1,411 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 1,433 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Undistributed basic earnings (losses) | (627)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (802)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (1,337)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (1,537)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, basic (in dollars per share) | $ 0.01 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ (0.01)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ 0.01 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ (0.01)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Basic | Discontinued Operations | Class B Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 116 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 118 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 234 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 252 us-gaap_Dividends / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Undistributed basic earnings (losses) | (103)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (133)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (221)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (266)us-gaap_UndistributedEarnings / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, basic (in dollars per share) | $ 0.01 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ (0.01)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ 0.01 us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ (0.01)us-gaap_EarningsPerShareBasic / rell_EarningsTypeAxis = rell_BasicMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Diluted |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Undistributed diluted earnings (losses) | (1,874)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember | (304)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember | (2,785)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember | 807 us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember
Net income (loss) | (1,057)us-gaap_NetIncomeLoss / rell_EarningsTypeAxis = rell_DilutedMember | 524 us-gaap_NetIncomeLoss / rell_EarningsTypeAxis = rell_DilutedMember | (1,140)us-gaap_NetIncomeLoss / rell_EarningsTypeAxis = rell_DilutedMember | 2,492 us-gaap_NetIncomeLoss / rell_EarningsTypeAxis = rell_DilutedMember
Denominator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Weighted average shares, diluted (in shares) | 11,770 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / rell_EarningsTypeAxis = rell_DilutedMember | 11,871 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / rell_EarningsTypeAxis = rell_DilutedMember | 11,797 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / rell_EarningsTypeAxis = rell_DilutedMember | 11,997 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / rell_EarningsTypeAxis = rell_DilutedMember
Weighted average shares and shares under if-coverted method for diluted EPS, diluted (in shares) | $ 2,141 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / rell_EarningsTypeAxis = rell_DilutedMember | $ 2,191 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / rell_EarningsTypeAxis = rell_DilutedMember | $ 2,161 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / rell_EarningsTypeAxis = rell_DilutedMember | $ 2,309 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare / rell_EarningsTypeAxis = rell_DilutedMember
Effect of dilutive securities dilutive stock options (in shares) | 0 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / rell_EarningsTypeAxis = rell_DilutedMember | 123 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / rell_EarningsTypeAxis = rell_DilutedMember | 0 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / rell_EarningsTypeAxis = rell_DilutedMember | 127 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / rell_EarningsTypeAxis = rell_DilutedMember
Denominator for diluted EPS adjusted for weighted average shares and assumed conversions (in shares) | 13,911 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment / rell_EarningsTypeAxis = rell_DilutedMember | 14,185 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment / rell_EarningsTypeAxis = rell_DilutedMember | 13,958 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment / rell_EarningsTypeAxis = rell_DilutedMember | 14,433 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment / rell_EarningsTypeAxis = rell_DilutedMember
Diluted | Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 701 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 710 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 1,411 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 1,433 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Undistributed diluted earnings (losses) | (1,610)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | (261)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | (2,391)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | 689 us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, diluted (in dollars per share) | $ (0.07)us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.03 us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ (0.08)us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember | $ 0.17 us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember
Diluted | Class B Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 116 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 118 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 234 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 252 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Undistributed diluted earnings (losses) | (264)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | (43)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | (394)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 118 us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, diluted (in dollars per share) | $ (0.06)us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.03 us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ (0.07)us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.16 us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Diluted | Continuing Operations |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Income from continuing operations | (1,144)us-gaap_IncomeLossFromContinuingOperations / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 631 us-gaap_IncomeLossFromContinuingOperations / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (1,227)us-gaap_IncomeLossFromContinuingOperations / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 2,610 us-gaap_IncomeLossFromContinuingOperations / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Undistributed diluted earnings (losses) | (1,961)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (197)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (2,872)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 925 us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Diluted | Continuing Operations | Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 701 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 710 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 1,411 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 1,433 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Undistributed diluted earnings (losses) | (1,685)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (169)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (2,466)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 790 us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, diluted (in dollars per share) | $ (0.08)us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 0.04 us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ (0.09)us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 0.18 us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Diluted | Continuing Operations | Class B Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 116 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 118 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 234 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 252 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Undistributed diluted earnings (losses) | (276)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (28)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | (406)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 135 us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, diluted (in dollars per share) | $ (0.07)us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 0.04 us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ (0.08)us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 0.17 us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Diluted | Discontinued Operations |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Undistributed diluted earnings (losses) | (730)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (935)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (1,558)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (1,803)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Income (loss) from discontinued operations, net of tax | 87 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (107)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 87 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (118)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Diluted | Discontinued Operations | Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 701 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 710 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 1,411 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 1,433 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Undistributed diluted earnings (losses) | (627)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (803)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (1,337)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (1,539)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Net income per share, diluted (in dollars per share) | $ 0.01 us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ (0.01)us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ 0.01 us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ (0.01)us-gaap_EarningsPerShareDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Diluted | Discontinued Operations | Class B Common Stock |  |  |  |
Numerator for Basic and Diluted Earnings Per Share [Abstract] |  |  |  |
Dividends | 116 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 118 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 234 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 252 us-gaap_Dividends / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Undistributed diluted earnings (losses) | $ (103)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ (132)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ (221)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ (264)us-gaap_UndistributedEarningsDiluted / rell_EarningsTypeAxis = rell_DilutedMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
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