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, 2025	Sep. 30, 2024	Jun. 30, 2025
Balance	$ 8,470	$ 7,930	$ 7,930
Provision for expected credit losses	320	77
Charge-offs	(123)	(126)
Recoveries	42	67
Balance	8,709	7,948	8,470
Commercial & Industrial [Member]
Balance	1,249	1,144	1,144
Provision for expected credit losses	54	(57)
Charge-offs	0	0
Recoveries	0	1
Balance	1,303	1,088	1,249
Commercial Real Estate Portfolio Segment [Member]
Balance	3,446	3,650	3,650
Provision for expected credit losses	91	28
Charge-offs	0	0
Recoveries	0	0
Balance	3,537	3,678	3,446
Farmland [Member]
Balance	118	89	89
Provision for expected credit losses	1	(2)
Charge-offs	0	0	0
Recoveries	0	0
Balance	119	87	118
Land Development [Member]
Balance	266	174	174
Provision for expected credit losses	(3)	9
Charge-offs	0	0	0
Recoveries	0	0
Balance	263	183	266
Residential Portfolio Segment [Member]
Balance	2,010	2,018	2,018
Provision for expected credit losses	28	(1)
Charge-offs	0	0	0
Recoveries	0	1
Balance	2,038	2,018	2,010
Consumer Portfolio Segment [Member]
Balance	1,381	855	855
Provision for expected credit losses	149	100
Charge-offs	(123)	(126)	(546)
Recoveries	42	65
Balance	$ 1,449	$ 894	$ 1,381