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Note 10 - Warrants to Purchase Common Stock (Details Textual) - $ / shares shares in Thousands | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Jan. 09, 2012
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Warrants and Rights Outstanding, Term (Year) | 4 years 10 days |  | 4 years 9 months 10 days |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 11.7 |  | $ 11.7 |
Warrants in Connection With Subordinated Notes [Member] | AAFK [Member] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  | 113 |  | 113
Warrants and Rights Outstanding, Term (Year) |  | 2 years |  | 2 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  | $ 0.01 |  | $ 0.01

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