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Note 2 - Summary of Significant Accounting Policies - Amortized Cost to Fair Value of HTM Debt Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Amortized cost | $ 19,349 | $ 21,059
Gross unrecognized gains | 59 | 50
Gross unrecognized losses | (12) | (33)
Fair value | $ 19,396 | $ 21,076

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