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v3.25.3

Note 4 - Equity - Common Stock Purchase Warrant Activity (Details) - $ / shares | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Outstanding (in shares) | 39,633 | 39,633 | 39,633 | 55,214 | 67,176 | 3,052 | 39,633 | 3,052 | 3,052
Outstanding (in dollars per share) | $ 503.75 | $ 503.75 | $ 503.75 | $ 361.6 | $ 297.21 | $ 4,054.81 | $ 503.75 | $ 4,054.81 | $ 4,054.81
Warrants issued (in shares) |  |  | 0 |  |  | 64,124 |  |  |
Warrants issued (in dollars per share) |  |  | $ 0 |  |  | $ 118.37 |  |  |
Warrants exercised (in shares) | 0 | 0 |  | 15,580 | 11,962 |  |  |  |
Warrants exercised (in dollars per share) | $ 0 | $ 0 |  | $ 0.01 | $ 0.01 |  |  |  |
Warrants cancelled or expired (in shares) | 25 |  |  | 0 |  |  |  |  |
Warrants cancelled or expired (in dollars per share) | $ 7,620 |  |  | $ 0 |  |  |  |  |
Outstanding (in shares) | 39,608 | 39,633 | 39,633 | 39,634 | 55,214 | 67,176 | 39,608 | 39,634 | 39,633

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