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Stock Award Plans and Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2026
Stock Award Plans and Stock-Based Compensation [Abstract] |
Schedule of Stock Options Granted | See below for a summary of the stock options granted under the 2011, 2017 and 2018 plans:
|  |  |  |  | Weighted |  |  | Weighted |  |  | Aggregate |
|  |  |  |  | Average |  |  | Average |  |  | Intrinsic |
|  | Number of |  |  | Exercise |  |  | Remaining |  |  | Value |
|  | Options |  |  | Price |  |  | Life (Years) |  |  | (in millions) |
Outstanding at January 1, 2026 |  |  | 15,941,550 |  |  | $ | 2.80 |  |  |  | 9.8 |  |  | $ | — |
Granted |  |  | 2,709,865 |  |  | $ | 1.66 |  |  |  |  |  |  |  |  |
Forfeitures |  |  | (430,133 | ) |  | $ | 16.21 |  |  |  |  |  |  |  |  |
Outstanding at March 31, 2026 |  |  | 18,221,282 |  |  | $ | 2.31 |  |  |  | 9.5 |  |  | $ | 5.7 |
Exercisable at March 31, 2026 |  |  | 8,930,436 |  |  | $ | 2.62 |  |  |  | 9.2 |  |  | $ | 2.4 |
Schedule of Fair Values of Options Awarded | The following assumptions were used in estimating the fair values of options awarded during the three months ended March 31, 2026:
|  | Three Months Ended March 31, 2026
Fair value of common stock |  | $1.43 - $1.92
Exercise price |  | $1.43 - $1.92
Expected term |  | 5.0 – 5.8 years
Volatility |  | 134.52% - 149.33%
Risk-free interest rate |  | 3.51% - 3.95%
Dividend yield |  | —%
Schedule of Stock-Based Compensation Charges | Stock-based compensation charges for the periods indicated below (in thousands) are as follows:
|  | Three Months Ended March 31, |
|  | 2026 |  |  | 2025 |
Research and development |  | $ | 205 |  |  | $ | 162 |
Sales and marketing |  |  | 382 |  |  |  | 16 |
General and administrative |  |  | 4,260 |  |  |  | 277 |
Total |  | $ | 4,847 |  |  | $ | 455 |

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