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Note 4 - Securities (Details Textual) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Dec. 31, 2023 USD ($)
Debt Securities, Available-for-Sale, Allowance for Credit Loss | $ 0 |  | $ 0
Interest Receivable on Securities | 3,263 |  | 3,281
Deferred Tax Asset, Debt Securities, Available-for-Sale, Unrealized Loss | $ 17,556 |  | $ 16,629
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | 566 |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position | $ 583,921 |  |
Debt Securities, Available-for-Sale, Realized Gain (Loss) | (0) | $ (3,332) |
Available-for-sale Securities Sold, Book Value | 46,850 |  |
National Bank of Blacksburg [Member] | Federal Home Loan Bank of Atlanta [Member] |  |  |
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged | $ 503,383 |  |

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