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Note 6 - Components of Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Loss) (Details) (Parentheticals) - AOCI Attributable to Parent [Member] - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Unrealized holding gain (loss) on available for sale securities, tax | $ (887) | $ 3,121
Reclassification adjustment for gain included in net income, taxes |  | $ (3)

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