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v3.25.2

Summary of Significant Accounting Policies - Schedule of Significant Expense Categories by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Collaboration revenues | $ 0 |  | $ 9,197 |  | $ 3,729 | $ 12,594 | $ 19,632 | $ 14,919
Less: |  |  |  |  |  |  |  |
Net loss | (9,774) | $ (9,266) | (11,162) | $ (18,978) | (19,040) | (30,140) | (60,477) | (86,879)
Reporting Segment |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Collaboration revenues | 0 |  | 9,197 |  | 3,729 | 12,594 | 19,632 | 14,919
Less: |  |  |  |  |  |  |  |
Research and development, excluding facilities, personnel, depreciation and amortization expenses | 1,499 |  | 7,643 |  | 3,027 | 17,834 | 33,147 | 45,905
General and administrative, excluding facilities and personnel expenses, depreciation and amortization expenses | 2,836 |  | 4,070 |  | 5,257 | 7,726 | 14,829 | 19,118
Facilities expense | 656 |  | 1,794 |  | 1,755 | 3,426 | 5,917 | 7,671
Personnel expense | 787 |  | 6,311 |  | 8,141 | 12,840 | 24,564 | 27,324
Depreciation, amortization and interest on finance and sale-leaseback lease liabilities | 38 |  | 1,153 |  | 750 | 2,338 | 3,894 | 3,984
Other segment items(a) | 3,958 |  | (612) |  | 3,839 | (1,430) | (2,242) | (2,204)
Net loss | $ (9,774) |  | $ (11,162) |  | $ (19,040) | $ (30,140) | $ (60,477) | $ (86,879)

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