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