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Stockholders' Equity - Additional Information (Details) - USD ($) |  |  | 9 Months Ended |
--- | --- | --- | --- | ---
Dec. 28, 2023 | Jan. 26, 2023 | Sep. 30, 2024 | May 31, 2023
Class of Stock [Line Items] |  |  |  |
Common stock aggregate offering maximum amount under at the market program |  |  |  | $ 350,000,000
Common stock voting rights |  |  | one vote |
Kite Collaboration Agreement |  |  |  |
Class of Stock [Line Items] |  |  |  |
Discount on shares sold price per share |  | $ 4.39 |  |
Reduction of deemed discount on shares sold |  | $ 15,300,000 |  |
Premium on shares sold price per share | $ 4.8 |  |  |
Increase in deemed premium on shares sold | $ 15,600,000 |  |  |
Common Stock |  |  |  |
Class of Stock [Line Items] |  |  |  |
Dividends declared or paid |  |  | $ 0 |
Private Placement | Gilead SPA and Second Gilead SPA |  |  |  |
Class of Stock [Line Items] |  |  |  |
Shares purchased | 3,242,542 | 3,478,261 |  |
Sale of stock, price per share | $ 61.68 | $ 28.75 |  |
Proceeds from issuance of private placement | $ 200,000,000 | $ 100,000,000 |  |
At-the-Market Offering |  |  |  |
Class of Stock [Line Items] |  |  |  |
Sale of stock, number of shares issued in transaction |  |  | 0 |

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