Prepaid Expenses and Other Current Assets and Accrued Expenses - Schedule of Prepaid Expenses (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Prepaid Expense and Other Assets, Current [Abstract] | ||
| CRO advances | $ 22,774 | $ 10,757 |
| Prepaid research and development | 2,249 | 541 |
| Prepaid clinical trial expenses | 1,014 | 750 |
| Prepaid insurance | 460 | 693 |
| Other prepaid expenses and other current assets | 1,014 | 478 |
| Total prepaid expenses and other current assets | $ 27,511 | $ 13,219 |