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Note 7 - Components of Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Balance | $ 168,736 | $ 148,962 | $ 156,409 | $ 140,522
Balance | 179,220 | 167,782 | 179,220 | 167,782
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] |  |  |  |
Balance | (50,740) | (66,044) | (62,093) | (62,556)
Unrealized holding gain on available for sale securities, net of tax | 6,015 | 16,115 | 17,368 | 12,627
Balance | (44,725) | (49,929) | (44,725) | (49,929)
AOCI Attributable to Parent [Member] |  |  |  |
Balance | (50,412) | (68,354) | (61,765) | (64,866)
Unrealized holding gain on available for sale securities, net of tax | 6,015 | 16,115 | 17,368 | 12,627
Balance | (44,397) | (52,239) | (44,397) | (52,239)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |
Balance | 328 | (2,310) | 328 | (2,310)
Unrealized holding gain on available for sale securities, net of tax | 0 | 0 | 0 | 0
Balance | $ 328 | $ (2,310) | $ 328 | $ (2,310)

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