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Note 10 - Warrants to Purchase Common Stock (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
|  | Warrants Outstanding & Exercisable |  |  | Weighted - Average Exercise Price |  |  | Average Remaining Term in Years |
Outstanding December 31, 2024 |  |  | 530 |  |  | $ | 11.70 |  |  |  | 4.78 |
Granted |  |  | 226 |  |  |  | 0.01 |  |  |  |  |
Exercised |  |  | (226 | ) |  |  | 0.01 |  |  |  |  |
Outstanding September 30, 2025 |  |  | 530 |  |  | $ | 11.70 |  |  |  | 4.03 |
Schedule of Warrants, Valuation Assumptions [Table Text Block] |
|  | For the nine months ended September 30, |
Description |  | 2025 |  |  | 2024 |
Dividend-yield |  |  | - | % |  |  | - | %
Risk-free interest rate |  |  | 3.99 | % |  |  | 4.50 | %
Expected volatility |  |  | 90.48 | % |  |  | 99.85 | %
Expected life (years) |  |  | 2.00 |  |  |  | 2.00 |
Exercise price per share |  | $ | 0.01 |  |  | $ | 0.01 |
Market value per share on grant date |  | $ | 2.59 |  |  | $ | 4.05 |
Fair value per share on grant date |  | $ | 2.58 |  |  | $ | 4.04 |

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- Definition Tabular disclosure for the valuation assumptions of warrants. + References No definition available. + Details
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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 + Details
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