Note 10 - Warrants - Summary of the Number of Warrants Outstanding (Details) - $ / shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Balance - beginning of period (in shares) | 18,750,000 | 18,750,000 |
| Balance - beginning of period, weighted average exercise price (in dollars per share) | $ 0.77 | $ 0.77 |
| Exercised, warrants (in shares) | 0 | 0 |
| Exercised, weighted average exercise price (in dollars per share) | $ 0 | $ 0 |
| Issued, warrants (in shares) | 0 | 0 |
| Issued, weighted average exercise price (in dollars per share) | $ 0 | $ 0 |
| Balance - end of period (in shares) | 18,750,000 | 18,750,000 |
| Balance - end of period, weighted average exercise price (in dollars per share) | $ 0.77 | $ 0.77 |