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v3.21.2

NEW ACCOUNTING PRONOUNCEMENTS (Details) | 6 Months Ended
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Sep. 30, 2021 loan
NEW ACCOUNTING PRONOUNCEMENTS |
Number of loan modifications approved | 0

X
- Definition Number of loan modifications approved for the COVID-19 + References No definition available. + Details
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Namespace Prefix: | rvsb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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