Note 3 - Loans and Allowance for Credit Losses - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2024
Balance	$ 7,930	$ 7,724	$ 7,724
Provision for expected credit losses	77	40
Charge-offs	(126)	(106)
Recoveries	67	72
Balance	7,948	7,782	7,930
Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance		52	52
Commercial & Industrial [Member]
Balance	1,144	1,308	1,308
Provision for expected credit losses	(57)	121
Charge-offs	0	0
Recoveries	1	0
Balance	1,088	974	1,144
Commercial & Industrial [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance		(455)	(455)
Commercial Real Estate Portfolio Segment [Member]
Balance	3,650	3,943	3,943
Provision for expected credit losses	28	61
Charge-offs	0	0
Recoveries	0	0
Balance	3,678	3,951	3,650
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance		(53)	(53)
Farmland [Member]
Balance	89	0	0
Provision for expected credit losses	(2)	(2)
Charge-offs	0	0	0
Recoveries	0	0
Balance	87	91	89
Farmland [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance		93	93
Land Development [Member]
Balance	174	0	0
Provision for expected credit losses	9	(132)
Charge-offs	0	0	0
Recoveries	0	0
Balance	183	266	174
Land Development [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance		398	398
Residential Portfolio Segment [Member]
Balance	2,018	1,571	1,571
Provision for expected credit losses	(1)	(99)
Charge-offs	0	0	0
Recoveries	1	0
Balance	2,018	1,638	2,018
Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance		166	166
Consumer Portfolio Segment [Member]
Balance	855	902	902
Provision for expected credit losses	100	91
Charge-offs	(126)	(106)	(560)
Recoveries	65	72
Balance	$ 894	862	855
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance		$ (97)	$ (97)