Note 11 - Stockholders' Equity - Summary of Warrant Activity (Details) - $ / shares |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2020 |
Dec. 31, 2019 |
|
| Outstanding (in shares) | 655,000 | |
| Outstanding, weighted average exercise price (in dollars per share) | $ 0.22 | |
| Outstanding, weighted average remaining contractual life (Year) | 4 years 328 days | 4 years 255 days |
| Issued (in shares) | 15,000,000 | |
| Issued, weighted average exercise price (in dollars per share) | $ 0.25 | |
| Exercised (in shares) | ||
| Exercised, weighted average exercise price (in dollars per share) | ||
| Forfeited/Cancelled (in shares) | ||
| Forfeited/Cancelled, weighted average exercise price (in dollars per share) | ||
| Outstanding (in shares) | 15,655,000 | 655,000 |
| Outstanding, weighted average exercise price (in dollars per share) | $ 0.25 | $ 0.22 |
| Exercisable (in shares) | 655,000 | |
| Exercisable, weighted average exercise price (in dollars per share) | $ 0.22 | |
| Exercisable, weighted average remaining contractual life (Year) | 4 years |