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Note 5 - Capital Stock (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Common Stock Outstanding Roll Forward [Table Text Block] |
Issued Shares as of December 31, 2023 |  |  | 573,644 |
Issuances from Preferred Stock conversions |  |  | 282,335 |
Issuances related to Common Warrant exercises |  |  | 288,947 |
Issued Shares as of December 31, 2024 |  |  | 1,144,926 |
Issuances from Common Warrant exercises |  |  | 521,725 |
Issuances from Preferred Stock conversions |  |  | 257,617 |
Issuances from Pre-Funded Warrant exercises |  |  | 1,283,131 |
Issued Shares as of September 30, 2025 |  |  | 3,207,399 |
Less Treasury Shares: |  |  | (189 | )
Outstanding Shares as of September 30, 2025 |  |  | 3,207,210 |
Warrants and Rights Outstanding, Make Whole Provision [Table Text Block] |
Warrant Tranche |  | Original Warrants Issued |  |  | Original Exercise Price (1) |  |  | Warrants Post Reverse Split (2) |  |  | Exercise Price Post Reverse Split (2) |  |  | Warrants Post Make Whole Provision (3) |  |  | Exercise Price Post Make Whole Provision (4) |  |  | Deemed Dividend |
Common Warrants issued in 2023 |  |  | 3,830,417 |  |  | $ | 1.71 |  |  |  | 95,764 |  |  | $ | 68.40 |  |  |  | 1,918,371 |  |  | $ | 3.41 |  |  | $ | 6,739,000 |
Common Warrants issued in 2024 |  |  | 963,745 |  |  | $ | 1.71 |  |  |  | 24,104 |  |  | $ | 68.40 |  |  |  | 482,676 |  |  | $ | 3.41 |  |  | $ | 1,696,000 |
Placement Agent Warrants |  |  | 306,433 |  |  | $ | 1.71 |  |  |  | 7,663 |  |  | $ | 68.40 |  |  |  | 153,470 |  |  | $ | 3.41 |  |  | $ | 539,000 |
Total |  |  | 5,100,595 |  |  |  |  |  |  |  | 127,531 |  |  |  |  |  |  |  | 2,554,517 |  |  |  |  |  |  | $ | 8,974,000 |
Aggregate Exercise Price |  | $ | 8,722,000 |  |  |  |  |  |  | $ | 8,722,000 |  |  |  |  |  |  | $ | 8,722,000 |  |  |  |  |  |  |  |  |
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
Issue Date and Description |  | Warrants Outstanding |  |  | Exercise Price |  | Expiration Date
Q1 2023 - Common Warrants and 2023 Placement Agent Warrants |  |  | 1,359,519 |  |  | $ | 3.41 |  | Q3 2028
Q2 2024 - Common Warrants |  |  | 390,959 |  |  | $ | 3.41 |  | Q4 2029
Q2 2025 - Pre-Funded Warrants (1) |  |  | 706,261 |  |  | $ | 3.77 |  | Q2 2030
Q2 2025 - Advisor Warrants |  |  | 100,000 |  |  | $ | 3.77 |  | Q2 2028
Q2 2025 - 2025 Placement Agent Warrants |  |  | 99,470 |  |  | $ | 4.71 |  | Q2 2030
Q3 2025 - Common Warrants |  |  | 152,519 |  |  | $ | 3.41 |  | Q3 2030
|  |  | 2,808,728 |  |  | $ | 3.56 |  |
|  | Outstanding and Exercisable |
|  | Number of Warrants |  |  | Weighted Average Exercise Price |
Warrants outstanding and exercisable, December 31, 2023 |  |  | 103,453 |  |  | $ | 69.03 |
Granted |  |  | 24,104 |  |  | $ | 68.40 |
Make Whole Provision |  |  | 2,426,986 |  |  | $ | 3.41 |
Exercised |  |  | (282,314 | ) |  | $ | 3.41 |
Expired |  |  | (26 | ) |  | $ | 2,575.38 |
Warrants outstanding and exercisable, December 31, 2024 |  |  | 2,272,203 |  |  | $ | 3.41 |
Granted |  |  | 2,341,381 |  |  | $ | 3.79 |
Exercised |  |  | (1,804,856 | ) |  | $ | 3.67 |
Warrants outstanding and exercisable, September 30, 2025 |  |  | 2,808,728 |  |  | $ | 3.56 |

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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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