Assets and Liabilities Classified as Discontinued Operations (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Aug. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payable to arrow for transition services	$ 0.5

Disposal group including discontinued operation accrued liabilities related to transition fee.

No definition available.

Name:	rell_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesRelatedToTransitionFee
Namespace Prefix:	rell_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant