Note 5 - Land, Premises and Equipment, Net (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Depreciation	$ 1.1	$ 0.7	$ 2.2	$ 1.3
Other Assets [Member]
Disposal Group, Including Discontinued Operation, Assets	0.4		0.4
Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] | Purchase Agreement to Sell Branch in West Fargo, North Dakota [Member]
Disposal Group, Including Discontinued Operation, Consideration	3.8		3.8
Disposal Group, Including Discontinued Operation, Assets	$ 0.4		$ 0.4