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Restatement - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Jun. 02, 2012
Retained Earnings Adjustments [Line Items] |
Net operating Loss carry forward, overstated | $ 2.1

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- Definition Operating Loss Carryforwards, Change in Amount + References No definition available. + Details
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Namespace Prefix: | rell_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration