Loans and Allowance for Loan Losses, Activity and Allocation of Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022
Allowance for Loan Losses [Abstract]
Threshold principal amount of nonaccrual loans evaluated individually for impairment	$ 250		$ 250
Activity of allowance for loan losses by loan category [Roll Forward]
Balance, beginning of period	22,289	$ 21,684	22,761	$ 19,668
Charge-offs	229	144	544	462
Recoveries	39	36	137	102
Provision	(944)	163	(1,199)	2,431
Balance, end of period	21,155	21,739	21,155	21,739
Allocation of allowance for loan losses by loan category [Abstract]
Allowance for loan losses, ending balance, impairment analysis individually evaluated	1,818		1,818		$ 2,347
Allowance for loan losses, ending balance, impairment analysis collectively evaluated	19,337		19,337		20,414
Loans receivable, ending balance, impairment analysis individually evaluated	9,798		9,798		10,771
Loans receivable, ending balance, impairment analysis collectively evaluated	$ 1,399,649		$ 1,399,649		1,241,216
Smaller Business Loans [Member] | Unsecured [Member]
Allowance for Loan Losses [Abstract]
Threshold period to charge off loans against allowance for loan losses	90 days		90 days
Residential Real Estate [Member] | Real Estate [Member]
Activity of allowance for loan losses by loan category [Roll Forward]
Balance, beginning of period	$ 2,492	1,981	$ 2,373	2,012
Charge-offs	0	0	0	0
Recoveries	0	3	5	10
Provision	146	22	260	(16)
Balance, end of period	2,638	2,006	2,638	2,006
Allocation of allowance for loan losses by loan category [Abstract]
Allowance for loan losses, ending balance, impairment analysis individually evaluated	595		595		588
Allowance for loan losses, ending balance, impairment analysis collectively evaluated	2,043		2,043		1,785
Loans receivable, ending balance, impairment analysis individually evaluated	3,183		3,183		2,943
Loans receivable, ending balance, impairment analysis collectively evaluated	371,657		371,657		357,881
Residential Real Estate [Member] | Construction and Land [Member]
Activity of allowance for loan losses by loan category [Roll Forward]
Balance, beginning of period	193	115	141	106
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(21)	2	31	11
Balance, end of period	172	117	172	117
Allocation of allowance for loan losses by loan category [Abstract]
Allowance for loan losses, ending balance, impairment analysis individually evaluated	0		0		0
Allowance for loan losses, ending balance, impairment analysis collectively evaluated	172		172		141
Loans receivable, ending balance, impairment analysis individually evaluated	0		0		0
Loans receivable, ending balance, impairment analysis collectively evaluated	17,567		17,567		15,298
Residential Real Estate [Member] | Multi-family [Member]
Activity of allowance for loan losses by loan category [Roll Forward]
Balance, beginning of period	167	76	119	186
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	32	10	80	(100)
Balance, end of period	199	86	199	86
Allocation of allowance for loan losses by loan category [Abstract]
Allowance for loan losses, ending balance, impairment analysis individually evaluated	0		0		0
Allowance for loan losses, ending balance, impairment analysis collectively evaluated	199		199		119
Loans receivable, ending balance, impairment analysis individually evaluated	0		0		0
Loans receivable, ending balance, impairment analysis collectively evaluated	67,251		67,251		63,822
Commercial Real Estate [Member] | Real Estate [Member]
Activity of allowance for loan losses by loan category [Roll Forward]
Balance, beginning of period	15,450	15,616	16,221	13,049
Charge-offs	9	0	9	0
Recoveries	0	0	0	0
Provision	(1,869)	276	(2,640)	2,843
Balance, end of period	13,572	15,892	13,572	15,892
Allocation of allowance for loan losses by loan category [Abstract]
Allowance for loan losses, ending balance, impairment analysis individually evaluated	459		459		1,118
Allowance for loan losses, ending balance, impairment analysis collectively evaluated	13,113		13,113		15,103
Loans receivable, ending balance, impairment analysis individually evaluated	4,696		4,696		3,765
Loans receivable, ending balance, impairment analysis collectively evaluated	698,072		698,072		591,870
Commercial Real Estate [Member] | Construction [Member]
Activity of allowance for loan losses by loan category [Roll Forward]
Balance, beginning of period	1,100	1,250	1,114	1,535
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	380	(121)	366	(406)
Balance, end of period	1,480	1,129	1,480	1,129
Allocation of allowance for loan losses by loan category [Abstract]
Allowance for loan losses, ending balance, impairment analysis individually evaluated	0		0		1
Allowance for loan losses, ending balance, impairment analysis collectively evaluated	1,480		1,480		1,113
Loans receivable, ending balance, impairment analysis individually evaluated	0		0		102
Loans receivable, ending balance, impairment analysis collectively evaluated	$ 108,854		$ 108,854		83,646
Consumer Loan [Member] | Unsecured [Member]
Allowance for Loan Losses [Abstract]
Threshold period to charge off loans against allowance for loan losses	90 days		90 days
Consumer Loan [Member] | Home Equity [Member]
Activity of allowance for loan losses by loan category [Roll Forward]
Balance, beginning of period	$ 38	89	$ 89	165
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	11	(2)	(40)	(78)
Balance, end of period	49	87	49	87
Allocation of allowance for loan losses by loan category [Abstract]
Allowance for loan losses, ending balance, impairment analysis individually evaluated	0		0		44
Allowance for loan losses, ending balance, impairment analysis collectively evaluated	49		49		45
Loans receivable, ending balance, impairment analysis individually evaluated	0		0		448
Loans receivable, ending balance, impairment analysis collectively evaluated	21,011		21,011		17,429
Consumer Loan [Member] | Consumer Installment [Member]
Activity of allowance for loan losses by loan category [Roll Forward]
Balance, beginning of period	284	280	349	267
Charge-offs	117	144	421	355
Recoveries	27	32	102	89
Provision	51	95	215	262
Balance, end of period	245	263	245	263
Allocation of allowance for loan losses by loan category [Abstract]
Allowance for loan losses, ending balance, impairment analysis individually evaluated	0		0		0
Allowance for loan losses, ending balance, impairment analysis collectively evaluated	245		245		349
Loans receivable, ending balance, impairment analysis individually evaluated	4		4		5
Loans receivable, ending balance, impairment analysis collectively evaluated	4,407		$ 4,407		4,507
Consumer Loan [Member] | Consumer Installment [Member] | Unsecured [Member]
Allowance for Loan Losses [Abstract]
Threshold period to charge off overdrawn deposit accounts against allowance for loan losses			60 days
Commercial Loans [Member]
Activity of allowance for loan losses by loan category [Roll Forward]
Balance, beginning of period	2,565	2,277	$ 2,355	2,348
Charge-offs	103	0	114	107
Recoveries	12	1	30	3
Provision	326	(119)	529	(85)
Balance, end of period	2,800	$ 2,159	2,800	$ 2,159
Allocation of allowance for loan losses by loan category [Abstract]
Allowance for loan losses, ending balance, impairment analysis individually evaluated	764		764		596
Allowance for loan losses, ending balance, impairment analysis collectively evaluated	2,036		2,036		1,759
Loans receivable, ending balance, impairment analysis individually evaluated	1,915		1,915		3,508
Loans receivable, ending balance, impairment analysis collectively evaluated	$ 110,830		$ 110,830		$ 106,763