Note 4 - Premises and Equipment, Net - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Property, plant and equipment, gross	$ 116,568	$ 103,043
Less: accumulated depreciation	(54,100)	(49,616)
Total premises and equipment	62,468	53,427
Land and Land Improvements [Member]
Property, plant and equipment, gross	16,250	14,021
Building [Member]
Property, plant and equipment, gross	68,733	62,365
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 31,585	$ 26,657