Note 6 - Premises and Equipment and Premises Held for Sale - Balance Sheet, Income Statement, and Cash Flow Detail Regarding Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Weighted average remaining lease term (years) (Year)	9 years 9 months 18 days	9 years
Weighted average discount rate	2.84%	2.57%
One year or less	$ 3,365	$ 3,453
Year two	2,864	3,293
Year three	2,543	2,739
Year four	2,536	2,339
Year five	2,547	2,245
Greater than five years	12,059	9,559
Total lease payments	25,914	23,628
Less imputed interest	3,427	2,620
Operating lease cost	3,338	3,077	$ 2,239
Variable lease cost	313	237	227
Less sublease income	101	96	95
Total lease cost	3,550	3,218	2,371
Cash paid for operating lease liabilities	4,063	3,833	$ 2,568
Premises and Equipment, Net [Member]
Right-of-use operating lease asset	21,007	19,694
Other Liabilities [Member]
Operating lease liability	$ 22,487	$ 21,008