Note 2 - Securities (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)		Jun. 30, 2024 USD ($)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax		$ 0		$ (17)	[1],[2]
Debt Securities, Available-for-Sale, Restricted	$ 160,259		$ 160,259			$ 153,908
Available-for-sale, Qualitative Disclosure, Number of Positions	424		424
Available-for-sale, Qualitative Disclosure, Number of Positions	367		367
Held-to-maturity, Qualitative Disclosure, Number of Positions	3		3
Equity Securities, FV-NI, Cost	$ 400		$ 400			400
Equity Securities, FV-NI	381		381			$ 381
Equity Securities, FV-NI, Unrealized Gain (Loss)	$ 0	0	$ 0	0
Equity Securities, FV-NI, Realized Gain (Loss)				$ 0
US States and Political Subdivisions Debt Securities [Member] | Rated [Member]
Percent of Available for Sale Debt Securities Portfolio	97.30%		97.30%
US States and Political Subdivisions Debt Securities [Member] | Non-rated [Member]
Percent of Available for Sale Debt Securities Portfolio	2.70%		2.70%
Maximum [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax		$ (1)

[1] Income tax expense

[2] Securities (gains) losses, net