Note 6 - Earnings (Loss) Per Common Share - Antidilutive Securities (Details) - shares shares in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Antidilutive securities (in shares) | 36,336 | 55,413 | 57,045 | 55,413 |
| Share-Based Payment Arrangement, Option [Member] | ||||
| Antidilutive securities (in shares) | 33,786 | 25,469 | 33,786 | 25,469 |
| Restricted Stock Units (RSUs) [Member] | ||||
| Antidilutive securities (in shares) | 24 | 920 | 24 | 920 |
| Warrant [Member] | ||||
| Antidilutive securities (in shares) | 2,526 | 4,346 | 2,526 | 4,346 |
| Convertible Debt Securities [Member] | ||||
| Antidilutive securities (in shares) | 0 | 24,678 | 20,709 | 24,678 |