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Note 10 - Equity - Outstanding Warrants (Details) - $ / shares | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Outstanding warrants (in shares) | 2,756,970 | 1,293,334
Warrant 1 [Member] |  |
Outstanding warrants (in shares) | 20,000 | 20,000
Outstanding warrants, expiration date (in dollars per share) | $ 4.56 |
Underwriter Purchase Warrants August 14, 2025 [Member] |  |
Outstanding warrants (in shares) | 933,334 |
Outstanding warrants, expiration date (in dollars per share) | $ 2.58 |
Warrant 2 [Member] |  |
Outstanding warrants (in shares) | 50,000 | 50,000
Outstanding warrants, expiration date (in dollars per share) | $ 4.56 |
Underwriter Purchase Warrants September 15, 2025 [Member] |  |
Outstanding warrants (in shares) | 140,000 |
Outstanding warrants, expiration date (in dollars per share) | $ 2.58 |
Warrant 3 [Member] |  |
Outstanding warrants (in shares) | 50,000 | 50,000
Outstanding warrants, expiration date (in dollars per share) | $ 4.56 |
Underwriter Purchase Warrants January 30, 2026 [Member] |  |
Outstanding warrants (in shares) | 1,272,727 |
Outstanding warrants, expiration date (in dollars per share) | $ 3.16 |
Warrant 4 [Member] |  |
Outstanding warrants (in shares) | 100,000 | 100,000
Outstanding warrants, expiration date (in dollars per share) | $ 4.56 |
Underwriter Purchase Warrants March 3, 2026 [Member] |  |
Outstanding warrants (in shares) | 190,909 |
Outstanding warrants, expiration date (in dollars per share) | $ 3.16 |
Underwriter Purchase Warrants 1 [Member] |  |
Outstanding warrants (in shares) | 1,073,334 | 1,073,334
Outstanding warrants, expiration date (in dollars per share) | $ 2.58 |
Underwriter Purchase Warrants 2 [Member] |  |
Outstanding warrants (in shares) | 1,463,636 | 0
Outstanding warrants, expiration date (in dollars per share) | $ 3.16 |

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