Note 3 - Investment Securities (Details Textual)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Securities Available For Sale Total Number Of Positions	161	207
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	157	176
Debt Securities, Available-for-Sale	$ 258,327,000	$ 276,601,000
Deposits [Member] | Asset Pledged as Collateral [Member]
Debt Securities, Available-for-Sale	$ 116,186,000	$ 124,367,000