Note 15 - Fair Value Measurements - Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Federal funds sold	$ 299	$ 0
Securities available for sale	601,898	618,601
Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 2 [Member]
Securities available for sale	601,898	618,601
Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Reported Value Measurement [Member]
Cash and due from banks	13,564	12,967
Federal funds sold	299
Interest-bearing deposits	94,254	73,636
Securities available for sale	601,898	618,601
Restricted stock, at cost	1,848	1,264
Mortgage loans held for sale	619	406
Loans, net	977,688	847,552
Accrued interest receivable	6,469	6,313
Bank-owned life insurance	47,369	43,583
Forward sale commitment	1
Interest rate loan contract		3
Deposits	1,644,752	1,503,972
Accrued interest payable	1,462	1,416
Forward sale commitment		4
Interest rate loan contract	1
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and due from banks	13,564	12,967
Federal funds sold	299
Interest-bearing deposits	94,254	73,636
Securities available for sale	0	0
Restricted stock, at cost	0	0
Mortgage loans held for sale	0	0
Loans, net	0	0
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Forward sale commitment	0
Interest rate loan contract		0
Deposits	0	0
Accrued interest payable	0	0
Forward sale commitment		0
Interest rate loan contract	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and due from banks	0	0
Federal funds sold	0
Interest-bearing deposits	0	0
Securities available for sale	601,898	618,601
Restricted stock, at cost	1,848	1,264
Mortgage loans held for sale	619	406
Loans, net	0	0
Accrued interest receivable	6,469	6,313
Bank-owned life insurance	47,369	43,583
Forward sale commitment	0
Interest rate loan contract		0
Deposits	1,332,138	1,280,732
Accrued interest payable	1,462	1,416
Forward sale commitment		0
Interest rate loan contract	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Cash and due from banks	0	0
Federal funds sold	0
Interest-bearing deposits	0	0
Securities available for sale	0	0
Restricted stock, at cost	0	0
Mortgage loans held for sale	0	0
Loans, net	927,581	793,800
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Forward sale commitment	1
Interest rate loan contract		3
Deposits	312,811	222,374
Accrued interest payable	0	0
Forward sale commitment		$ 4
Interest rate loan contract	$ 1