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

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").

No definition available.

Name:	rvsb_MinimumReserveBalance
Namespace Prefix:	rvsb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant