Note 4 - Premises and Equipment, Net - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, plant and equipment, gross	$ 94,717	$ 90,338
Less: accumulated depreciation	43,789	38,862
Total premises and equipment	50,928	51,476
Land and Land Improvements [Member]
Property, plant and equipment, gross	12,782	13,532
Building [Member]
Property, plant and equipment, gross	56,778	53,865
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 25,157	$ 22,941