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Note 12 - Marketable Equity Securities (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Proceeds from Sale of Equity Securities, FV-NI | $ 1,919 | $ 0
Harvard Apparatus Regenerative Technology, Inc. (“HART”) [Member] |  |
Investment Owned, Fair Value |  | 3,500
Equity Securities, FV-NI, Realized Loss | 1,600 | $ 600
Proceeds from Sale of Equity Securities, FV-NI | $ 1,900 |

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