Note 4 - Loans - Major Classifications (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Gross loans	$ 710,104	$ 611,567
Gross loans	710,104	611,567
Net deferred loan fees and costs	258	276
Allowance for loan losses	(7,724)	(7,160)	$ (6,471)
Net loans	702,638	604,683
Commercial Portfolio Segment [Member]
Gross loans	112,558	87,008
Gross loans	112,558	87,008
Allowance for loan losses	(1,308)	(960)	(904)
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses	(3,943)	(3,927)	(3,949)
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	23,981	15,158
Gross loans	23,981	15,158
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member]
Gross loans	318,636	291,847
Gross loans	318,636	291,847
Residential Portfolio Segment [Member]
Allowance for loan losses	(1,571)	(1,645)	(1,307)
Residential Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	8,443	4,317
Gross loans	8,443	4,317
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member]
Gross loans	156,989	142,244
Gross loans	156,989	142,244
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Gross loans	23,880	26,029
Gross loans	23,880	26,029
Consumer Portfolio Segment [Member]
Gross loans	65,617	44,964
Gross loans	65,617	44,964
Allowance for loan losses	$ (902)	$ (628)	$ (311)