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Description of Business and Basis of Financial Statements (Details) $ in Thousands | 117 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2025 USD ($) program | Nov. 03, 2025 employee | Dec. 31, 2024 USD ($) | Sep. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
Accounting Policies [Line Items] |  |  |  |  |
Number of development programs | program | 3 |  |  |  |
Accumulated deficit | $ (589,271) |  | $ (511,399) |  |
Proceeds from issuance of private placement | 496,300 |  |  |  |
Cash, cash equivalents and restricted cash | $ 35,132 |  | $ 35,668 | $ 59,071 | $ 46,674
Subsequent Event |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |
Number of employees | employee |  | 90 |  |  |

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