Note 7 - Net Loss Per Share - Antidilutive Securities (Details) - shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Antidilutive securities (in shares) | 11,544,408 | 13,728,708 |
| Warrant [Member] | ||
| Antidilutive securities (in shares) | 193,481 | 208,744 |
| Share-Based Payment Arrangement, Option [Member] | ||
| Antidilutive securities (in shares) | 11,119,350 | 13,493,432 |
| Employee Stock Purchase Plan Award [Member] | ||
| Antidilutive securities (in shares) | 31,577 | 26,532 |
| Restricted Stock Units (RSUs) [Member] | ||
| Antidilutive securities (in shares) | 200,000 | 0 |