Note 6 - Loss Per Share - Antidilutive Securities (Details) - shares shares in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Share-Based Payment Arrangement, Option [Member] | ||||
| Antidilutive securities (in shares) | 27,630 | 25,684 | 34,846 | 25,684 |
| Restricted Stock Units (RSUs) [Member] | ||||
| Antidilutive securities (in shares) | 48 | 225 | 48 | 225 |
| Warrant [Member] | ||||
| Antidilutive securities (in shares) | 2,526 | 4,346 | 2,526 | 4,346 |
| Convertible Debt Securities [Member] | ||||
| Antidilutive securities (in shares) | 0 | 24,878 | 20,709 | 24,878 |