Note 2 - Securities (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Feb. 01, 2024 USD ($)	Jun. 30, 2023 USD ($)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax		$ (1)	$ (16)	$ (3)
Debt Securities, Available-for-Sale, Restricted	$ 140,998		$ 140,998			$ 137,896
Qualitative Disclosure, Number of Positions	413		413
Available-for-sale, Qualitative Disclosure, Number of Positions	365		365
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	98.50%		98.50%
US States and Political Subdivisions Debt Securities [Member] | Non-rated [Member]
Percent of Available for Sale Debt Securities Portfolio	1.50%		1.50%
Other Debt Obligations [Member] | Subsequent Event [Member]
Debt Securities, Available-for-Sale, Amortized Cost, after Allowance for Credit Loss					$ 2,000
Maximum [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax		$ (1)		$ (3)