Loans, Loan Balances by Internal Credit Quality Indicator (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2021 USD ($) Loan Segment	Jun. 30, 2020 USD ($)
Loan Balances by Internal Credit Quality Indicator [Abstract]
Number of segments within loan portfolio | Segment	4
Total gross loans	$ 1,108,408	$ 1,012,660
Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	1,058,741	979,874
Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	16,685	25,479
Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	32,982	7,307
Doubtful [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	0
Loss [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 0	0
Residential Real Estate [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Loan-to-value ratio	85.00%
Residential Real Estate [Member] | Residential Mortgage with Private Mortgage Insurance [Member] | Maximum [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Loan-to-value ratio	85.00%
Residential Real Estate [Member] | Residential Real Estate [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 325,167	279,332
Residential Real Estate [Member] | Residential Real Estate [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	321,826	275,599
Residential Real Estate [Member] | Residential Real Estate [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	88	996
Residential Real Estate [Member] | Residential Real Estate [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	3,253	2,737
Residential Real Estate [Member] | Construction and Land [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	10,185	11,847
Residential Real Estate [Member] | Construction and Land [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	10,185	11,847
Residential Real Estate [Member] | Construction and Land [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	0
Residential Real Estate [Member] | Construction and Land [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	0
Residential Real Estate [Member] | Multi-family [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	41,951	25,104
Residential Real Estate [Member] | Multi-family [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	41,589	23,336
Residential Real Estate [Member] | Multi-family [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	1,645
Residential Real Estate [Member] | Multi-family [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	362	123
Commercial Real Estate [Member] | Real Estate Mortgage [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	472,887	381,415
Commercial Real Estate [Member] | Real Estate Mortgage [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	441,004	364,884
Commercial Real Estate [Member] | Real Estate Mortgage [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 9,690	13,189
Number of loan relationships downgraded | Loan	11
Commercial Real Estate [Member] | Real Estate Mortgage [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 22,193	3,342
Number of loan relationships downgraded | Loan	3
Commercial Real Estate [Member] | Construction [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 62,763	74,920
Commercial Real Estate [Member] | Construction [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	55,819	67,844
Commercial Real Estate [Member] | Construction [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 5,944	6,974
Number of loan relationships downgraded | Loan	1
Commercial Real Estate [Member] | Construction [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 1,000	102
Number of loan relationships downgraded | Loan	1
Consumer Loan [Member] | Home Equity [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 18,285	22,106
Consumer Loan [Member] | Home Equity [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	17,727	21,466
Consumer Loan [Member] | Home Equity [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	0
Consumer Loan [Member] | Home Equity [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	558	640
Consumer Loan [Member] | Consumer Installment [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	4,942	4,817
Consumer Loan [Member] | Consumer Installment [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	4,942	4,817
Consumer Loan [Member] | Consumer Installment [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	0
Consumer Loan [Member] | Consumer Installment [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	0
Commercial Loans [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	172,228	213,119
Commercial Loans [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	165,649	210,081
Commercial Loans [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 963	2,675
Number of loan relationships downgraded | Loan	11
Commercial Loans [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 5,616	$ 363
Number of loan relationships downgraded | Loan	4