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Note 14 - Subsequent Events (Details Textual) - Certain Institutional and Individual Investors [Member] - USD ($) $ / shares in Units, $ in Millions |  | 12 Months Ended
--- | --- | ---
Mar. 07, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Stock Issued During Period, Shares, New Issues (in shares) |  | 7,000,000 | 10,500,000
March 2025 Direct Offering [Member] | Subsequent Event [Member] |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | 5,715,000 |  |
Shares Issued, Price Per Share (in dollars per share) | $ 3.5 |  |
Proceeds from Issuance of Common Stock, Gross | $ 20.0 |  |
Proceeds from Issuance of Common Stock, Net | $ 18.3 |  |

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