Note 6 - Bank Premises and Equipment - Components of Bank Premises and Equipments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property Plant And Equipment Gross	$ 56,838	$ 53,338
Less accumulated depreciation and amortization	(22,606)	(22,031)
Bank premises and equipment, net	34,232	31,307
Land [Member]
Property Plant And Equipment Gross	3,226	3,421
Building [Member]
Property Plant And Equipment Gross	18,328	19,105
Furniture and Fixtures [Member]
Property Plant And Equipment Gross	15,821	15,919
Leasehold Improvements [Member]
Property Plant And Equipment Gross	10,651	10,659
Construction in Progress [Member]
Property Plant And Equipment Gross	$ 8,812	$ 4,234