Note 10 - Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Investment securities	$ 29,805	$ 35,935
Allowance for credit losses	19,575	18,099
Deferred compensation	6,807	6,349
Operating lease liability	5,449	5,066
Acquired loan fair value adjustments	3,205	3,506
Accrued expenses	2,691	4,605
Interest rate swaps	63	6
Write-downs and costs associated with OREO	27	21
Deferred PPP loan fees	17	77
Investments in tax credit partnerships	0	215
State net operating loss	0	540
Total deferred tax assets	67,639	74,419
Right-of-use operating lease asset	5,181	4,848
Mortgage servicing rights	3,192	3,712
Property and equipment	2,036	2,395
Other liabilities	2,025	2,009
Investments in tax credit partnerships	1,515	0
Loan costs	1,504	1,272
Leases	200	170
Total deferred tax liabilities	20,403	20,274
Net deferred tax asset	47,236	54,145
Core Deposits [Member]
Intangibles	2,688	3,399
Customer Lists [Member]
Intangibles	$ 2,062	$ 2,469