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Note 12 - Stock-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
(in thousands, except years and per share data) |  | Awards |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Life (years) |  |  | Aggregate Intrinsic Value |
Outstanding at December 31, 2024 |  |  | 7 |  |  | $ | 471.64 |  |  |  | 8.3 |  |  | $ | 3 |
Restricted stock units vested |  |  | (5 | ) |  |  | — |  |  |  |  |  |  |  |  |
Options forfeited/cancelled |  |  | (1 | ) |  |  | 928.62 |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2025 |  |  | 1 |  |  |  | 448.84 |  |  |  | 2.9 |  |  |  | — |
Vested and expected to vest at September 30, 2025 |  |  | 1 |  |  |  | 448.84 |  |  |  | 2.9 |  |  |  | — |
Vested and exercisable at September 30, 2025 |  |  | 1 |  |  |  | 2,541.07 |  |  |  | 2.9 |  |  |  | — |
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
General and administrative |  | $ | - |  |  | $ | 22 |  |  | $ | 6 |  |  | $ | 137 |

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