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Note 4 - Investment Securities (Details Textual) $ in Thousands | Apr. 01, 2022 USD ($) | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | --- | ---
Debt Securities, Available-for-Sale, Allowance for Credit Loss |  | $ 0 |
Debt Securities, Available-for-Sale, Increase to the Carrying Value Resulting From Derivative Instrument That Increased the Unrealized Loss Position |  | $ 600 | $ 2,200
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions |  | 418 | 416
Debt Securities, Available-for-sale, Amortized Cost, Transfer, Amount | $ 245,500 |  |
Debt Securities, Available-for-Sale, Amortized Cost, Net of Gain (Loss), Transfer | 221,700 |  |
Debt Securities, Available-for-Sale, Transfer to Held to Maturity, Gain (Loss) | $ 18,900 |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss |  | $ 0 |
Asset Pledged as Collateral [Member] | Deposits [Member] |  |  |
Debt Securities |  | 404,800 |
US States and Political Subdivisions Debt Securities [Member] |  |  |
Debt Securities, Available-for-Sale, Increase From Derivative Instruments |  | $ 300 |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions |  | 237 |
US States and Political Subdivisions Debt Securities [Member] | Measurement Input, Loss Severity [Member] |  |  |
Debt Securities, Available-for-Sale, Measurement Input |  | 0.1344 |
US Government Agencies Debt Securities [Member] |  |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions |  | 46 |
US Government Agencies Debt Securities [Member] | Measurement Input, Loss Severity [Member] |  |  |
Debt Securities, Available-for-Sale, Measurement Input |  | 0.1103 |
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] |  |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions |  | 135 |
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Measurement Input, Loss Severity [Member] |  |  |
Debt Securities, Available-for-Sale, Measurement Input |  | 0.1545 |
Accrued Interest Receivable [Member] |  |  |
Interest Receivable, Investment Securities |  | $ 3,000 | $ 3,400

X
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale transferred to investment in debt security measured at amortized cost (held-to-maturity). + References No definition available. + Details
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