Note 7 - Warrants - Summary of Warrants Outstanding and Exercisable (Details) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Feb. 11, 2021 |
|
| Number outstanding (in shares) | 2,850,000 | 2,850,000 | |
| Warrants Issued in Connection with Private Placement [Member] | |||
| Number outstanding (in shares) | 2,500,000 | ||
| Weighted average remaining life (Year) | 7 months 13 days | ||
| Exercise price (in dollars per share) | $ 5.1 | $ 5.1 | |
| The Placement Agent Warrants [Member] | |||
| Number outstanding (in shares) | 350,000 | ||
| Weighted average remaining life (Year) | 7 months 13 days | ||
| Exercise price (in dollars per share) | $ 6.45 | $ 6.45 |