LOANS - Summary of Bank's Loans by Risk Ratings (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans And Leases Receivables Gross Carrying Amount	$ 157,728	$ 158,009
Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans And Leases Receivables Gross Carrying Amount	157,728	158,009
Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans And Leases Receivables Gross Carrying Amount	0	0
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans And Leases Receivables Gross Carrying Amount	14,761	16,366
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans And Leases Receivables Gross Carrying Amount	14,761	14,342
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loans And Leases Receivables Gross Carrying Amount	$ 0	$ 2,024