Goodwill and Other Intangible Assets - Additional Information (Detail)	3 Months Ended
Aug. 30, 2014
Intangible Assets Disclosure [Line Items]
Weighted average number of years of amortization expense	17 years 3 months 15 days

Finite lived intangible assets remaining amortization expense period.

No definition available.

Name:	rell_FiniteLivedIntangibleAssetsRemainingAmortizationExpensePeriod
Namespace Prefix:	rell_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration