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Warranties (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 01, 2012	Jun. 02, 2012
Warranties (Textual) [Abstract]
Warranty reserves	$ 0.2	$ 0.1
Warranty term, minimum	1 year
Warranty term, maximum	3 years

X

- Details

Name:	rell_WarrantiesTextualAbstract
Namespace Prefix:	rell_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Warranty period, minimum.

+ References

No definition available.

+ Details

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

X

- Definition

Warranty reserves.

+ References

No definition available.

+ Details

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

X

- Definition

Warranty term, maximum.

+ References

No definition available.

+ Details

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