Note 5 - Affordable Tax Credit Partnership - Schedule of Investments in Affordable Housing Projects (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023
Affordable housing tax credit investment	$ 10,250		$ 10,250
Less: amortization	(1)		0
Net affordable housing tax credit investment	10,249		10,250
Unfunded commitments	9,305		9,668
Tax credits and other tax benefits recognized	15	$ 0
Proportional amortization expense included in provision for income taxes	1		$ (0)
Income Tax Expense [Member]
Less: amortization	(1)	0
Proportional amortization expense included in provision for income taxes	$ 1	$ 0