Note 5 - Affordable Tax Credit Partnership - Schedule of Investments in Affordable Housing Projects (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2023
Affordable housing tax credit investment	$ 10,250		$ 10,250		$ 10,250
Less: amortization			(2)		0
Net affordable housing tax credit investment	10,248		10,248		10,250
Unfunded commitments	9,305		9,305		9,668
Tax credits and other tax benefits recognized	8	$ 0	23	$ 0
Proportional amortization expense included in provision for income taxes			2		$ (0)
Income Tax Expense [Member]
Less: amortization	(1)	0	(2)	0
Proportional amortization expense included in provision for income taxes	$ 1	$ 0	$ 2	$ 0