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Note 3 - Securities - Summary of Amortized Costs and Fair Values of Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Sep. 01, 2022
--- | --- | --- | ---
Debt Securities, Available-for-Sale, Amortized Cost | $ 185,917 | $ 173,458 | $ 82,200
Gross unrealized gains, available for sale securities | 62 | 61 |
Gross unrealized losses, available for sale securities | (22,132) | (20,662) |
Debt Securities, Available-for-Sale | 163,847 | 152,857 | $ 74,400
Securities available for sale, AFS | 0 | 0 |
Amortized cost, held to maturity | 109,836 | 148,351 |
Gross unrealized gains, held to maturity securities | 8 | 107 |
Gross unrealized losses, held to maturity securities | (10,969) | (10,844) |
Fair value, held to maturity securities | 98,875 | 137,614 |
Securities available for sale, HTM | (95) | (107) |
Amortized cost | 295,753 | 321,809 |
Gross unrealized gains | 70 | 168 |
Gross unrealized losses | (33,101) | (31,506) |
Total securities, fair value | 262,722 | 290,471 |
Total securities, allowance for credit loss | (95) | (107) |
US Treasury Securities [Member] |  |  |
Debt Securities, Available-for-Sale, Amortized Cost | 12,483 | 12,476 |
Gross unrealized gains, available for sale securities | 0 | 0 |
Gross unrealized losses, available for sale securities | (795) | (1,026) |
Debt Securities, Available-for-Sale | 11,688 | 11,450 |
Securities available for sale, AFS | 0 | 0 |
Amortized cost, held to maturity | 9,632 | 39,085 |
Gross unrealized gains, held to maturity securities | 0 | 0 |
Gross unrealized losses, held to maturity securities | (125) | (389) |
Fair value, held to maturity securities | 9,507 | 38,696 |
Securities available for sale, HTM | 0 | 0 |
US Agency and Mortgage-backed Securities [Member] |  |  |
Debt Securities, Available-for-Sale, Amortized Cost | 110,480 | 96,937 |
Gross unrealized gains, available for sale securities | 57 | 55 |
Gross unrealized losses, available for sale securities | (12,498) | (12,192) |
Debt Securities, Available-for-Sale | 98,039 | 84,800 |
Securities available for sale, AFS | 0 | 0 |
Amortized cost, held to maturity | 86,555 | 94,617 |
Gross unrealized gains, held to maturity securities | 0 | 0 |
Gross unrealized losses, held to maturity securities | (9,282) | (8,992) |
Fair value, held to maturity securities | 77,273 | 85,625 |
Securities available for sale, HTM | 0 | 0 |
US States and Political Subdivisions Debt Securities [Member] |  |  |
Debt Securities, Available-for-Sale, Amortized Cost | 62,954 | 64,045 |
Gross unrealized gains, available for sale securities | 5 | 6 |
Gross unrealized losses, available for sale securities | (8,839) | (7,444) |
Debt Securities, Available-for-Sale | 54,120 | 56,607 |
Securities available for sale, AFS | 0 | 0 |
Amortized cost, held to maturity | 10,649 | 11,649 |
Gross unrealized gains, held to maturity securities | 8 | 107 |
Gross unrealized losses, held to maturity securities | (1,112) | (943) |
Fair value, held to maturity securities | 9,545 | 10,813 |
Securities available for sale, HTM | 0 | 0 |
Corporate Debt Securities [Member] |  |  |
Amortized cost, held to maturity | 3,000 | 3,000 |
Gross unrealized gains, held to maturity securities | 0 | 0 |
Gross unrealized losses, held to maturity securities | (450) | (520) |
Fair value, held to maturity securities | 2,550 | 2,480 |
Securities available for sale, HTM | $ (95) | $ (107) |

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