Equity Incentive Plans - Summary of Fair Values of the Options Granted (Detail) |
9 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Expected dividend yield | 0.00% | 0.00% |
| Maximum [Member] | ||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Expected term (in years) | 6 years 29 days | 6 years 3 months |
| Expected volatility ,Minimum | 102.90% | 103.70% |
| Risk-free interest rate | 4.61% | 4.43% |
| Minimum [Member] | ||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Expected term (in years) | 5 years 6 months | 5 years 6 months |
| Expected volatility ,Minimum | 96.50% | 102.60% |
| Risk-free interest rate | 3.77% | 3.76% |