Note 2 - Securities (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	$ 0	$ 0	$ (17)	$ (4)
Debt Securities, Available-for-Sale, Restricted	$ 156,460		$ 156,460		$ 137,896
Qualitative Disclosure, Number of Positions	411		411
Available-for-sale, Qualitative Disclosure, Number of Positions	379		379
Held-to-maturity, Qualitative Disclosure, Number of Positions	4		4
Equity Securities, FV-NI, Cost	$ 400		$ 400		$ 400
Equity Securities, FV-NI, Realized Gain (Loss), Total	$ 0	0	$ 0	$ 0
US States and Political Subdivisions Debt Securities [Member] | Rated [Member]
Percent of Available for Sale Debt Securities Portfolio	98.60%		98.60%
US States and Political Subdivisions Debt Securities [Member] | Non-rated [Member]
Percent of Available for Sale Debt Securities Portfolio	1.40%		1.40%
Other Debt Obligations [Member] | Moody's, Ba2 Rating [Member]
Debt Securities, Available-for-Sale, Amortized Cost, after Allowance for Credit Loss	$ 2,000		$ 2,000
Maximum [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	$ (1)	$ (1)