Note 3 - Summary of Significant Accounting Policies - Schedule of Basic and Diluted Loss Per Share (Details) - shares |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Antidilutive securities (in shares) | 68,972 | 7,222 |
| Share-Based Payment Arrangement, Option [Member] | ||
| Antidilutive securities (in shares) | 150 | 900 |
| Warrant [Member] | ||
| Antidilutive securities (in shares) | 6,322 | 6,322 |
| Representative's Warrants [Member] | ||
| Antidilutive securities (in shares) | 62,500 | 0 |