XML 62 R51.htm IDEA: XBRL DOCUMENT
v3.20.4

Risks and Uncertainties - Additional Information (Details) $ in Millions | 6 Months Ended
--- | ---
Nov. 28, 2020 USD ($)
Risks And Uncertainties [Abstract] |
Deferred employer social security tax payments | $ 0.8

X
- Definition Social security tax employer deferral CARES Act. + References No definition available. + Details
Name: | rell_SocialSecurityTaxEmployerDeferralCARESAct
Namespace Prefix: | rell_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RisksAndUncertaintiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration