Significant Agreements - Supplemental Information related to the BMS Collaboration Agreement (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaboration receivable — related party	$ 120		$ 120		$ 0
Deferred revenue — related party	8,315		8,315		7,092
Deferred revenue, net of current — related party	59,562		59,562		63,218
Juno Therapeutics, Inc. \| Collaborative Arrangement, Research Collaboration and License Agreement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaboration receivable — related party	120		120		0
Deferred revenue — related party	8,315		8,315		7,092
Deferred revenue, net of current — related party	59,562		59,562		$ 63,218
Revenue recognized that was included in contract liability at the beginning of the period	1,061	$ 0	2,502	$ 0
Revenue recognized from performance obligations fully or partially satisfied in previous periods	$ 5	$ 0	$ 3	$ 0

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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