Loans and Allowance for Loan Losses, Loan Balances by Internal Credit Quality Indicator (Details) $ in Thousands	6 Months Ended
	Dec. 31, 2020 USD ($) Segment	Jun. 30, 2020 USD ($)
Loan Balances by Internal Credit Quality Indicator [Abstract]
Number of segments within loan portfolio | Segment	4
Total gross loans	$ 1,051,167	$ 1,012,660
Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	1,011,747	979,173
Watch [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	1,203	701
Substandard or Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	38,200	32,800
Increase in gross loans	5,400
Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	28,163	25,479
Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	10,054	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] | 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	$ 299,479	279,332
Residential Real Estate [Member] | Residential Real Estate [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	295,850	274,973
Residential Real Estate [Member] | Residential Real Estate [Member] | Watch [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	840	626
Residential Real Estate [Member] | Residential Real Estate [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	81	996
Residential Real Estate [Member] | Residential Real Estate [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	2,708	2,737
Residential Real Estate [Member] | Construction and Land [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	7,494	11,847
Residential Real Estate [Member] | Construction and Land [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	7,494	11,847
Residential Real Estate [Member] | Construction and Land [Member] | Watch [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	0
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	28,000	25,104
Residential Real Estate [Member] | Multi-family [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	26,009	23,336
Residential Real Estate [Member] | Multi-family [Member] | Watch [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	0
Residential Real Estate [Member] | Multi-family [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	1,627	1,645
Residential Real Estate [Member] | Multi-family [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	364	123
Commercial Real Estate [Member] | Real Estate [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	448,122	381,415
Commercial Real Estate [Member] | Real Estate [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	423,153	364,884
Commercial Real Estate [Member] | Real Estate [Member] | Watch [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	316	0
Commercial Real Estate [Member] | Real Estate [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	21,020	13,189
Commercial Real Estate [Member] | Real Estate [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	3,633	3,342
Commercial Real Estate [Member] | Construction [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	72,200	74,920
Commercial Real Estate [Member] | Construction [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	70,253	67,844
Commercial Real Estate [Member] | Construction [Member] | Watch [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	0
Commercial Real Estate [Member] | Construction [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	1,947	6,974
Commercial Real Estate [Member] | Construction [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	102
Consumer Loan [Member] | Home Equity [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	19,922	22,106
Consumer Loan [Member] | Home Equity [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	19,355	21,466
Consumer Loan [Member] | Home Equity [Member] | Watch [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	0
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	567	640
Consumer Loan [Member] | Consumer Installment [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	4,851	4,817
Consumer Loan [Member] | Consumer Installment [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	4,804	4,792
Consumer Loan [Member] | Consumer Installment [Member] | Watch [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	47	25
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	171,099	213,119
Commercial Loans [Member] | Performing [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	164,829	210,031
Commercial Loans [Member] | Watch [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	0	50
Commercial Loans [Member] | Special Mention [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	3,488	2,675
Commercial Loans [Member] | Substandard [Member]
Loan Balances by Internal Credit Quality Indicator [Abstract]
Total gross loans	$ 2,782	$ 363