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Note 2 - Securities - Summary of Amortized Costs and Fair Values of Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Amortized cost, available for sale securities | $ 181,007 | $ 185,917 |
Gross unrealized gains, available for sale securities | 66 | 62 |
Gross unrealized losses, available for sale securities | (20,097) | (22,132) |
Fair value, available for sale securities | 160,976 | 163,847 |
Securities available for sale, AFS | 0 | 0 |
Amortized cost, held to maturity | 108,379 | 109,835 |
Gross unrealized gains, held to maturity securities | 5 | 8 |
Gross unrealized losses, held to maturity securities | (9,439) | (10,969) |
Fair value, held to maturity securities | 98,945 | 98,874 |
Securities available for sale, HTM | (87) | (94) | $ (106)
Amortized cost | 289,386 | 295,752 |
Gross unrealized gains | 71 | 70 |
Gross unrealized losses | (29,536) | (33,101) |
Total securities, fair value | 259,921 | 262,721 |
Total securities, allowance for credit loss | (87) | (94) |
US Treasury Securities [Member] |  |  |
Amortized cost, available for sale securities | 12,486 | 12,483 |
Gross unrealized gains, available for sale securities | 0 | 0 |
Gross unrealized losses, available for sale securities | (646) | (795) |
Fair value, available for sale securities | 11,840 | 11,688 |
Securities available for sale, AFS | 0 | 0 |
Amortized cost, held to maturity | 9,696 | 9,632 |
Gross unrealized gains, held to maturity securities | 0 | 0 |
Gross unrealized losses, held to maturity securities | (81) | (125) |
Fair value, held to maturity securities | 9,615 | 9,507 |
Securities available for sale, HTM | 0 | 0 | 0
US Agency and Mortgage-backed Securities [Member] |  |  |
Amortized cost, available for sale securities | 105,963 | 110,480 |
Gross unrealized gains, available for sale securities | 62 | 57 |
Gross unrealized losses, available for sale securities | (10,954) | (12,498) |
Fair value, available for sale securities | 95,071 | 98,039 |
Securities available for sale, AFS | 0 | 0 |
Amortized cost, held to maturity | 85,038 | 86,554 |
Gross unrealized gains, held to maturity securities | 0 | 0 |
Gross unrealized losses, held to maturity securities | (7,874) | (9,282) |
Fair value, held to maturity securities | 77,164 | 77,272 |
Securities available for sale, HTM | 0 | 0 | 0
US States and Political Subdivisions Debt Securities [Member] |  |  |
Amortized cost, available for sale securities | 62,558 | 62,954 |
Gross unrealized gains, available for sale securities | 4 | 5 |
Gross unrealized losses, available for sale securities | (8,497) | (8,839) |
Fair value, available for sale securities | 54,065 | 54,120 |
Securities available for sale, AFS | 0 | 0 |
Amortized cost, held to maturity | 10,645 | 10,649 |
Gross unrealized gains, held to maturity securities | 5 | 8 |
Gross unrealized losses, held to maturity securities | (1,064) | (1,112) |
Fair value, held to maturity securities | 9,586 | 9,545 |
Securities available for sale, HTM | 0 | 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 | (420) | (450) |
Fair value, held to maturity securities | 2,580 | 2,550 |
Securities available for sale, HTM | $ (87) | $ (94) | $ (106)

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