Nature of Operations and Summary of Significant Accounting Policies - Schedule of Impact of ASU 2016-13 Adoption (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023	Jul. 01, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses on off-balance sheet exposures	$ 98	$ 216
Allowance For Credit Losses As Reported Under ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			$ 7,099
Allowance for credit losses on off-balance sheet exposures			496
Allowance For Credit Loss Before ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			7,052
Allowance for credit losses on off-balance sheet exposures			0
Impact On Allowance Of ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			47
Allowance for credit losses on off-balance sheet exposures			496
Commercial Portfolio Segment [Member] \| Allowance For Credit Losses As Reported Under ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			1,207
Commercial Portfolio Segment [Member] \| Allowance For Credit Loss Before ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			2,025
Commercial Portfolio Segment [Member] \| Impact On Allowance Of ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			(818)
Consumer Portfolio Segment [Member] \| Allowance For Credit Losses As Reported Under ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			93
Consumer Portfolio Segment [Member] \| Allowance For Credit Loss Before ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			80
Consumer Portfolio Segment [Member] \| Impact On Allowance Of ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			13
Real Estate Loans One To Four Family Including Home Equity Loans [Member] \| Allowance For Credit Losses As Reported Under ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			1,410
Real Estate Loans One To Four Family Including Home Equity Loans [Member] \| Allowance For Credit Loss Before ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			1,028
Real Estate Loans One To Four Family Including Home Equity Loans [Member] \| Impact On Allowance Of ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			382
Real Estate Loans Multi Family [Member] \| Allowance For Credit Losses As Reported Under ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			1,235
Real Estate Loans Multi Family [Member] \| Allowance For Credit Loss Before ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			1,375
Real Estate Loans Multi Family [Member] \| Impact On Allowance Of ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			(140)
Commercial Real Estate Portfolio Segment [Member] \| Allowance For Credit Losses As Reported Under ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			2,370
Commercial Real Estate Portfolio Segment [Member] \| Allowance For Credit Loss Before ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			1,985
Commercial Real Estate Portfolio Segment [Member] \| Impact On Allowance Of ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			385
Real Estate Loans Home Equity Lines Of Credit [Member] \| Allowance For Credit Losses As Reported Under ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			103
Real Estate Loans Home Equity Lines Of Credit [Member] \| Allowance For Credit Loss Before ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			70
Real Estate Loans Home Equity Lines Of Credit [Member] \| Impact On Allowance Of ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			33
Construction Loans [Member] \| Allowance For Credit Losses As Reported Under ASU 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			681
Construction Loans [Member] \| Allowance For Credit Loss Before ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			489
Construction Loans [Member] \| Impact On Allowance Of ASU 2016-13 Adoption [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for loan losses			$ 192