Note 4 - Loans - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Balance	$ 7,160	$ 6,471
Provision for loan losses	855	735
Loans charged-off	(447)	(173)
Recoveries	156	127
Balance	7,724	7,160
Individually evaluated for impairment	0	0
Total ending allowance balance	7,724	7,160
Loans individually evaluated for impairment	405	473
Total ending loans balance	711,960	613,057
Financial Asset Acquired [Member]
Acquired loans collectively evaluated for impairment	114	148
Loans collectively evaluated for impairment	31,843	41,542
Financial Asset Originated [Member]
Acquired loans collectively evaluated for impairment	7,610	7,012
Loans collectively evaluated for impairment	679,712	571,042
Commercial Portfolio Segment [Member]
Balance	960	904
Provision for loan losses	348	33
Loans charged-off	0	0
Recoveries	0	23
Balance	1,308	960
Individually evaluated for impairment	0	0
Total ending allowance balance	1,308	960
Loans individually evaluated for impairment	314	276
Total ending loans balance	112,826	87,251
Commercial Portfolio Segment [Member] | Financial Asset Acquired [Member]
Acquired loans collectively evaluated for impairment	0	1
Loans collectively evaluated for impairment	622	665
Commercial Portfolio Segment [Member] | Financial Asset Originated [Member]
Acquired loans collectively evaluated for impairment	1,308	959
Loans collectively evaluated for impairment	111,890	86,310
Commercial Real Estate Portfolio Segment [Member]
Balance	3,927	3,949
Provision for loan losses	15	(24)
Loans charged-off	0	0
Recoveries	1	2
Balance	3,943	3,927
Individually evaluated for impairment	0	0
Total ending allowance balance	3,943	3,927
Loans individually evaluated for impairment	88	42
Total ending loans balance	342,701	306,913
Commercial Real Estate Portfolio Segment [Member] | Financial Asset Acquired [Member]
Acquired loans collectively evaluated for impairment	40	62
Loans collectively evaluated for impairment	6,953	10,095
Commercial Real Estate Portfolio Segment [Member] | Financial Asset Originated [Member]
Acquired loans collectively evaluated for impairment	3,903	3,865
Loans collectively evaluated for impairment	335,660	296,776
Residential Portfolio Segment [Member]
Balance	1,645	1,307
Provision for loan losses	(72)	359
Loans charged-off	(6)	(41)
Recoveries	4	20
Balance	1,571	1,645
Individually evaluated for impairment	0	0
Total ending allowance balance	1,571	1,645
Loans individually evaluated for impairment	3	155
Total ending loans balance	190,839	173,944
Residential Portfolio Segment [Member] | Financial Asset Acquired [Member]
Acquired loans collectively evaluated for impairment	74	85
Loans collectively evaluated for impairment	23,038	27,731
Residential Portfolio Segment [Member] | Financial Asset Originated [Member]
Acquired loans collectively evaluated for impairment	1,497	1,560
Loans collectively evaluated for impairment	167,798	146,058
Consumer Portfolio Segment [Member]
Balance	628	311
Provision for loan losses	564	367
Loans charged-off	(441)	(132)
Recoveries	151	82
Balance	902	628
Individually evaluated for impairment	0	0
Total ending allowance balance	902	628
Loans individually evaluated for impairment	0	0
Total ending loans balance	65,594	44,949
Consumer Portfolio Segment [Member] | Financial Asset Acquired [Member]
Acquired loans collectively evaluated for impairment	0	0
Loans collectively evaluated for impairment	1,230	3,051
Consumer Portfolio Segment [Member] | Financial Asset Originated [Member]
Acquired loans collectively evaluated for impairment	902	628
Loans collectively evaluated for impairment	$ 64,364	$ 41,898