Note 2 - Securities (Details Textual) $ in Thousands		3 Months Ended	9 Months Ended
		Mar. 31, 2025 USD ($)	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	[1],[2]		$ (1)
Debt Securities, Available-for-Sale, Restricted			$ 153,682			$ 164,473
Available-for-sale, Qualitative Disclosure, Number of Positions			404
Available-for-sale, Qualitative Disclosure, Number of Positions			330
Held-to-maturity, Qualitative Disclosure, Number of Positions			3
Equity Securities, FV-NI, Cost					$ 400	400
Equity Securities, FV-NI						$ 392
Equity Securities, FV-NI, Realized Gain (Loss)		$ 0	$ 8	$ 0
US States and Political Subdivisions Debt Securities [Member] | Rated [Member]
Percent of Available for Sale Debt Securities Portfolio			97.50%
US States and Political Subdivisions Debt Securities [Member] | Non-rated [Member]
Percent of Available for Sale Debt Securities Portfolio			2.50%
Maximum [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax			$ (5)

[1] Income tax expense

[2] Securities losses, net