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Segment Information - Schedule of Disaggregated Amounts of Research and Development Expenses and General and Administrative Expenses (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Research and development: |  |  |  |
Total research and development expenses | $ 6,669 | $ 5,653 | $ 12,630 | $ 9,693
General and administrative: |  |  |  |
Total general and administrative expense | 5,115 | 1,705 | 11,233 | 4,460
Direct Program Costs |  |  |  |
Research and development: |  |  |  |
Total research and development expenses | 5,372 | 4,879 | 9,896 | 7,988
Personnel Related |  |  |  |
Research and development: |  |  |  |
Total research and development expenses | 1,045 | 774 | 2,180 | 1,648
General and administrative: |  |  |  |
Total general and administrative expense | 1,467 | 589 | 3,529 | 1,328
Stock-Based Compensation |  |  |  |
Research and development: |  |  |  |
Total research and development expenses | 142 | 0 | 303 | 57
General and administrative: |  |  |  |
Total general and administrative expense | 769 | 0 | 1,484 | 0
Other |  |  |  |
Research and development: |  |  |  |
Total research and development expenses | 110 | 0 | 251 | 0
Consulting and Professional Services |  |  |  |
General and administrative: |  |  |  |
Total general and administrative expense | 1,496 | 645 | 3,473 | 2,301
Facilities Related and Other |  |  |  |
General and administrative: |  |  |  |
Total general and administrative expense | $ 1,383 | $ 471 | $ 2,747 | $ 831

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