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v3.23.1

RESTRICTED ASSETS (Details) - USD ($) | Mar. 31, 2023 | Mar. 31, 2022
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RESTRICTED ASSETS. |  |
Minimum reserve balance | $ 0 | $ 0

X
- Definition Represents the amount of reserve balances either on hand or on deposit with the Federal Reserve Bank of San Francisco ("FRB"), based on a percentage of deposits as of the date indicated, as required by regulations of the Board of Governors of the Federal Reserve System ("Federal Reserve Board"). + References No definition available. + Details
Name: | rvsb_MinimumReserveBalance
Namespace Prefix: | rvsb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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