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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2025
Equity [Abstract] |
Summary of Stock Options Activity | The following table sets forth the activity for the Company’s stock options during the six months ended June 30, 2025:
|  | Number of Options |  |  | Weighted- average exercise price per share |  |  | Weighted- average remaining contractual term (in years) |  |  | Aggregate intrinsic value |
Outstanding at December 31, 2024 |  |  | 222,079 |  |  | $ | 78.37 |  |  |  | 7.2 |  |  | $ | — |
Granted |  |  | 39,440 |  |  |  | 5.38 |  |  |  | — |  |  |  | — |
Cancelled |  |  | (20,387 | ) |  |  | 137.39 |  |  |  | — |  |  |  | — |
Outstanding at June 30, 2025 |  |  | 241,132 |  |  | $ | 61.44 |  |  |  | 7.8 |  |  | $ | — |
Vested and expected to vest at June 30, 2025 |  |  | 241,132 |  |  | $ | 61.44 |  |  |  | 7.8 |  |  | $ | — |
Vested and exercisable at June 30, 2025 |  |  | 119,914 |  |  | $ | 112.44 |  |  |  | 6.3 |  |  | $ | — |
Summary of Stock-based Compensation Expense | The Company recorded stock-based compensation expense related to the issuance of stock as follows (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Research and development |  | $ | 5 |  |  | $ | 188 |  |  | $ | 10 |  |  | $ | 817 |
General and administrative |  |  | 167 |  |  |  | 703 |  |  |  | 341 |  |  |  | 1,433 |
Total stock-based compensation |  | $ | 172 |  |  | $ | 891 |  |  | $ | 351 |  |  | $ | 2,250 |
Summary of Fair Value Assumptions of Options Granted | The fair values of the options granted were estimated using the following assumptions:
|  | Six Months Ended |  |
|  | June 30, |  |
|  | 2025 |  |  | 2024 |  |
Risk-free interest rate |  |  | 4.4 | % |  |  | 4.2 | % |
Expected term (in years) |  |  | 5.9 |  |  |  | 5.3 |  |
Expected volatility |  |  | 95.9 | % |  |  | 99.3 | % |
Expected dividend yield |  |  | — |  |  |  | — |  |
Schedule of Activity for RSUs | The following table sets forth the activity for the Company’s RSUs during the six months ended June 30, 2025:
|  | Restricted Stock Units |  |  | Weighted- average grant date fair value |
Total nonvested units at December 31, 2024 |  |  | 15,600 |  |  | $ | 17.75 |
Granted |  |  | — |  |  |  | — |
Vested |  |  | (5,148 | ) |  |  | 17.75 |
Cancelled |  |  | — |  |  |  | — |
Total nonvested units at June 30, 2025 |  |  | 10,452 |  |  | $ | 17.75 |

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