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v3.25.1

PREMISES AND EQUIPMENT - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
PREMISES AND EQUIPMENT |  |  |
Depreciation and amortization expense | $ 2.1 | $ 2.0 | $ 1.7

X
- Definition Represents the depreciation expense for Premises and Equipment during the indicated period. + References No definition available. + Details
Name: | rvsb_PremisesAndEquipmentDepreciationExpense
Namespace Prefix: | rvsb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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