Note 3 - Investments - Schedule of Securities Pledged as Collateral (Details) - State and Local Government Public Deposits [Member] - Asset Pledged as Collateral [Member] $ in Thousands	Dec. 31, 2024 USD ($)
Investment Securities, Carrying Value	$ 34,384
Investment Securities, Amortized Cost	40,343
Investment Securities, Fair Value	$ 34,384