Loans - Loan Delinquencies and Non-accrual Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2023
Financing Receivable, Past Due [Line Items]
Non-accrual loans secured	$ 2,900		$ 2,900
Non-accrual loans unsecured	111		111
Total Loans	470,815		470,815
Recorded Investment Loans on Non-Accrual	3,017		3,017
Total Loans					$ 480,856
Recorded Investment Loans on Non-Accrual					4,033
Interest income	54	$ 56	106	$ 111
30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	962		962
Total Past Due					541
60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	1,571		1,571
Total Past Due					1,544
90 Days Or Greater
Financing Receivable, Past Due [Line Items]
Total Loans	1,314		1,314
Total Past Due					1,345
Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	3,847		3,847
Total Past Due					3,430
Current
Financing Receivable, Past Due [Line Items]
Total Loans	466,968		466,968
Current					477,354
Acquired credit impaired
Financing Receivable, Past Due [Line Items]
Total Past Due					72
Residential real estate | 1-4 Family
Financing Receivable, Past Due [Line Items]
Total Loans	129,670		129,670
Recorded Investment Loans on Non-Accrual	1,480		1,480
Total Loans					135,046
Recorded Investment Loans on Non-Accrual					2,090
Residential real estate | 1-4 Family | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	285		285
Total Past Due					290
Residential real estate | 1-4 Family | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	591		591
Total Past Due					457
Residential real estate | 1-4 Family | 90 Days Or Greater
Financing Receivable, Past Due [Line Items]
Total Loans	193		193
Total Past Due					567
Residential real estate | 1-4 Family | Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	1,069		1,069
Total Past Due					1,314
Residential real estate | 1-4 Family | Current
Financing Receivable, Past Due [Line Items]
Total Loans	128,601		128,601
Current					133,660
Residential real estate | 1-4 Family | Acquired credit impaired
Financing Receivable, Past Due [Line Items]
Total Past Due					72
Residential real estate | Home equity and HELOCs
Financing Receivable, Past Due [Line Items]
Total Loans	31,182		31,182
Recorded Investment Loans on Non-Accrual	16		16
Total Loans					32,684
Residential real estate | Home equity and HELOCs | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	646		646
Residential real estate | Home equity and HELOCs | 90 Days Or Greater
Financing Receivable, Past Due [Line Items]
Total Loans	16		16
Residential real estate | Home equity and HELOCs | Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	662		662
Residential real estate | Home equity and HELOCs | Current
Financing Receivable, Past Due [Line Items]
Total Loans	30,520		30,520
Current					32,684
Residential real estate | Construction Residential
Financing Receivable, Past Due [Line Items]
Total Loans	9,899		9,899
Total Loans					9,113
Residential real estate | Construction Residential | Current
Financing Receivable, Past Due [Line Items]
Total Loans	9,899		9,899
Current					9,113
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total Loans	52,700		52,700
Commercial real estate | 1-4 Family
Financing Receivable, Past Due [Line Items]
Total Loans	94,336		94,336
Commercial real estate | 1 - 4 family investor
Financing Receivable, Past Due [Line Items]
Total Loans	94,336		94,336
Recorded Investment Loans on Non-Accrual	102		102
Total Loans					98,160
Recorded Investment Loans on Non-Accrual					832
Commercial real estate | 1 - 4 family investor | 30 - 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	31		31
Commercial real estate | 1 - 4 family investor | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	949		949
Total Past Due					752
Commercial real estate | 1 - 4 family investor | 90 Days Or Greater
Financing Receivable, Past Due [Line Items]
Total Loans	38		38
Commercial real estate | 1 - 4 family investor | Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	1,018		1,018
Total Past Due					752
Commercial real estate | 1 - 4 family investor | Current
Financing Receivable, Past Due [Line Items]
Total Loans	93,318		93,318
Current					97,408
Commercial real estate | Multi-family (five or more)
Financing Receivable, Past Due [Line Items]
Total Loans	15,106		15,106
Recorded Investment Loans on Non-Accrual	223		223
Total Loans					15,281
Recorded Investment Loans on Non-Accrual					251
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 | Multi-family (five or more) | Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due					251
Commercial real estate | Multi-family (five or more) | Current
Financing Receivable, Past Due [Line Items]
Total Loans	15,106		15,106
Current					15,030
Commercial real estate | Commercial non-residential
Financing Receivable, Past Due [Line Items]
Total Loans	153,886		153,886
Recorded Investment Loans on Non-Accrual	1,085		1,085
Total Loans					157,555
Recorded Investment Loans on Non-Accrual					778
Commercial real estate | Commercial non-residential | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	18		18
Total Past Due					322
Commercial real estate | Commercial non-residential | 90 Days Or Greater
Financing Receivable, Past Due [Line Items]
Total Loans	1,067		1,067
Total Past Due					778
Commercial real estate | Commercial non-residential | Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	1,085		1,085
Total Past Due					1,100
Commercial real estate | Commercial non-residential | Current
Financing Receivable, Past Due [Line Items]
Total Loans	152,801		152,801
Current					156,455
Commercial real estate | Construction and land
Financing Receivable, Past Due [Line Items]
Total Loans	19,953		19,953
Total Loans					15,584
Commercial real estate | Construction and land | Current
Financing Receivable, Past Due [Line Items]
Total Loans	19,953		19,953
Current					15,584
Commercial
Financing Receivable, Past Due [Line Items]
Total Loans	14,786		14,786
Total Loans					15,433
Commercial | Current
Financing Receivable, Past Due [Line Items]
Total Loans	14,786		14,786
Current					15,433
Consumer
Financing Receivable, Past Due [Line Items]
Total Loans	1,997		1,997
Recorded Investment Loans on Non-Accrual	111		111
Total Loans					2,000
Recorded Investment Loans on Non-Accrual					82
Consumer | 60 - 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	13		13
Total Past Due					13
Consumer | Past Due
Financing Receivable, Past Due [Line Items]
Total Loans	13		13
Total Past Due					13
Consumer | Current
Financing Receivable, Past Due [Line Items]
Total Loans	$ 1,984		$ 1,984
Current					$ 1,987