Note 3 - Loans and Allowance for Credit Losses - Major Classifications (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022
Gross loans	$ 717,719	$ 710,104
Unamortized deferred loan costs, net	202	258
Less allowance for credit losses	(7,782)	(7,724)	$ (7,546)	$ (7,160)
Net loans	710,139	702,638
Commercial Portfolio Segment [Member]
Gross loans	111,235	112,558
Less allowance for credit losses		(1,308)	(1,021)	(960)
Commercial Real Estate Portfolio Segment [Member]
Less allowance for credit losses	(3,951)	(3,943)	(4,072)	(3,927)
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loans [Member]
Gross loans	154,688	151,005
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Loans [Member]
Gross loans	143,341	140,002
Farmland [Member]
Gross loans	40,610	40,606
Less allowance for credit losses	(91)	0
Land Development [Member]
Gross loans	9,396	11,004
Less allowance for credit losses	(266)	0
Residential Portfolio Segment [Member]
Gross loans	189,501	189,312
Less allowance for credit losses	(1,638)	(1,571)	(1,676)	(1,645)
Consumer Portfolio Segment [Member]
Gross loans	68,948	65,617
Less allowance for credit losses	$ (862)	$ (902)	$ (777)	$ (628)