Note 5 - Stockholders' Equity, Options, and Warrants - Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Outstanding, number (in shares) | 3,000,000 | 5,000,000 |
| Outstanding, weighted average grant date fair value (in dollars per share) | $ 0.04 | |
| Outstanding, number (in shares) | 40,500,000 | 3,000,000 |
| Outstanding, weighted average grant date fair value (in dollars per share) | $ 0.03 | $ 0.04 |