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Stockholders' Equity (Deficit) (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |
Schedule of Convertible Preferred Stock | At December 31, 2024, the Company’s convertible preferred stock consisted of the following (in thousands, except share and per share amounts):
Series |  | Shares Authorized |  |  | Shares Outstanding |  |  | Per Share Original Issuance and Conversion Price |  |  | Liquidation Preference |  |  | Carrying Value |
Series A |  |  | 26,250,131 |  |  |  | 26,250,131 |  |  | $ | 0.5714 |  |  | $ | 15,000 |  |  | $ | 14,850 |
Series B |  |  | 22,660,592 |  |  |  | 22,660,592 |  |  | $ | 1.2857 |  |  |  | 29,135 |  |  |  | 29,054 |
Series C |  |  | 48,030,730 |  |  |  | 48,030,730 |  |  | $ | 1.7697 |  |  |  | 85,000 |  |  |  | 82,852 |
Total |  |  | 96,941,453 |  |  |  | 96,941,453 |  |  |  |  |  | $ | 129,135 |  |  | $ | 126,756 |
Schedule of Weighted-average Assumptions Used to Determine Fair Value of Stock Options Granted | The weighted-average assumptions used in the Black-Scholes option pricing model to determine the fair value of the stock options granted in the years ended December 31, 2025 and 2024 were as follows:
|  | Year Ended December 31, |
|  | 2025 |  |  | 2024 |
Risk-free interest rate |  |  | 4.09 | % |  |  | 4.05 | %
Expected volatility |  |  | 103.3 | % |  |  | 101.7 | %
Expected term (in years) |  |  | 6.0 |  |  |  | 6.0 |
Expected dividend yield |  |  | — |  |  |  | — |
Schedule of Allocation of Stock Based Compensation Expense | The allocation of stock-based compensation expense was as follows (in thousands):
|  | Year Ended December 31, |
|  | 2025 |  |  | 2024 |
Research and development expense |  | $ | 1,731 |  |  | $ | 288 |
General and administrative expense |  |  | 2,217 |  |  |  | 151 |
Total stock-based compensation expense |  | $ | 3,948 |  |  | $ | 439 |
Schedule of Early Exercise of Stock Option Awards | A summary of the unvested common stock issued pursuant to an early exercise of stock option awards is as follows:
|  | Number of Unvested Shares |
Balance at January 1, 2025 |  |  | 8,417 |
Early-exercised stock options |  |  | 2,950 |
Vested shares |  |  | (11,367 | )
Balance at December 31, 2025 |  |  | — |
Schedule of Common Stock Reserved for Future Issuance | Common stock reserved for future issuance consisted of the following:
|  | December 31, |
|  | 2025 |  |  | 2024 |
Conversion of outstanding convertible preferred stock |  |  | — |  |  |  | 11,439,841 |
Outstanding stock options |  |  | 3,038,413 |  |  |  | 991,058 |
Shares available for issuance under the Plans |  |  | 849,328 |  |  |  | 1,164,562 |
Shares available for issuance under the ESPP |  |  | 185,408 |  |  |  | — |
Total |  |  | 4,073,149 |  |  |  | 13,595,461 |
Employee and Non-Employee Awards |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |
Schedule of Stock Option Activity | Stock option activity for employee and nonemployee awards and related information is as follows:
|  | Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term (in years) |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding and expected to vest at December 31, 2024 |  |  | 991,058 |  |  | $ | 3.83 |  |  |  | 8.4 |  |  | $ | 3,175 |
Granted |  |  | 2,315,283 |  |  | $ | 10.81 |  |  |  |  |  |  |
Exercised |  |  | (149,876 | ) |  | $ | 2.43 |  |  |  |  |  |  |
Canceled/forfeited |  |  | (118,052 | ) |  | $ | 7.44 |  |  |  |  |  |  |
Outstanding and expected to vest at December 31, 2025 |  |  | 3,038,413 |  |  | $ | 9.08 |  |  |  | 9.0 |  |  | $ | 12,360 |
Exercisable at December 31, 2025 |  |  | 374,682 |  |  | $ | 3.44 |  |  |  | 6.9 |  |  | $ | 3,627 |

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