XML 45 R33.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Revenue Recognition - Additional Information (Details) | 6 Months Ended
--- | ---
Nov. 30, 2019
Maximum |
Revenue Recognition [Line Items] |
Services revenue recognized as percentage of aggregate revenue | 5.00%
Term of product warranty | 3 years
Minimum |
Revenue Recognition [Line Items] |
Term of product warranty | 1 year

X
- Definition Revenue recognition. + References No definition available. + Details
Name: | rell_RevenueRecognitionLineItems
Namespace Prefix: | rell_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Services revenue recognized as percentage of aggregate revenue. + References No definition available. + Details
Name: | rell_ServicesRevenueRecognizedAsPercentageOfAggregateRevenue
Namespace Prefix: | rell_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Term of product warranty. + References No definition available. + Details
Name: | rell_TermOfProductWarranty
Namespace Prefix: | rell_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |