Loans - Loan Delinquencies and Non-accrual Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 3,430	$ 5,958
Total Loans	480,856	478,920
Recorded Investment Loans on Non-Accrual	4,033	6,511
Interest income	192	275
Current	477,354	472,806
30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	541	1,849
60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	1,544	1,116
90 Days Or Greater
Financing Receivable, Past Due [Line Items]
Total Past Due	1,345	2,993
Acquired credit impaired
Financing Receivable, Past Due [Line Items]
Total Past Due	72	156
Residential real estate | 1-4 Family
Financing Receivable, Past Due [Line Items]
Total Past Due	1,314	4,542
Total Loans	135,046	147,143
Recorded Investment Loans on Non-Accrual	2,090	4,781
Current	133,660	142,468
Residential real estate | 1-4 Family | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	290	1,528
Residential real estate | 1-4 Family | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	457	622
Residential real estate | 1-4 Family | 90 Days Or Greater
Financing Receivable, Past Due [Line Items]
Total Past Due	567	2,392
Residential real estate | 1-4 Family | Acquired credit impaired
Financing Receivable, Past Due [Line Items]
Total Past Due	72	133
Residential real estate | Home equity and HELOCs
Financing Receivable, Past Due [Line Items]
Total Past Due		202
Total Loans	32,684	32,590
Recorded Investment Loans on Non-Accrual		341
Current	32,684	32,365
Residential real estate | Home equity and HELOCs | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due		19
Residential real estate | Home equity and HELOCs | 90 Days Or Greater
Financing Receivable, Past Due [Line Items]
Total Past Due		183
Residential real estate | Home equity and HELOCs | Acquired credit impaired
Financing Receivable, Past Due [Line Items]
Total Past Due		23
Residential real estate | Construction Residential
Financing Receivable, Past Due [Line Items]
Total Loans	9,113	14,778
Current	9,113	14,778
Commercial real estate | 1 - 4 family investor
Financing Receivable, Past Due [Line Items]
Total Past Due	752
Total Loans	98,160	96,508
Recorded Investment Loans on Non-Accrual	832	106
Current	97,408	96,508
Commercial real estate | 1 - 4 family investor | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	752
Commercial real estate | Multi-family (five or more)
Financing Receivable, Past Due [Line Items]
Total Past Due	251
Total Loans	15,281	13,015
Recorded Investment Loans on Non-Accrual	251	291
Current	15,030	13,015
Commercial real estate | Multi-family (five or more) | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	251
Commercial real estate | Commercial non-residential
Financing Receivable, Past Due [Line Items]
Total Past Due	1,100	1,187
Total Loans	157,555	158,294
Recorded Investment Loans on Non-Accrual	778	875
Current	156,455	157,107
Commercial real estate | Commercial non-residential | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due		275
Commercial real estate | Commercial non-residential | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	322	494
Commercial real estate | Commercial non-residential | 90 Days Or Greater
Financing Receivable, Past Due [Line Items]
Total Past Due	778	418
Commercial real estate | Construction and Land
Financing Receivable, Past Due [Line Items]
Total Loans	15,584	4,942
Current	15,584	4,942
Commercial
Financing Receivable, Past Due [Line Items]
Total Loans	15,433	9,411
Current	15,433	9,411
Consumer
Financing Receivable, Past Due [Line Items]
Total Past Due	13	27
Total Loans	2,000	2,239
Recorded Investment Loans on Non-Accrual	82	117
Current	1,987	2,212
Consumer | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due		$ 27
Consumer | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 13