License, Collaboration, and Success Payment Agreements - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Oct. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) $ / shares
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Research and development expense	$ 40,261,000	$ 47,471,000	$ 83,435,000	$ 92,101,000
Series A Convertible Preferred Stock
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Convertible preferred stock, par value (in dollars per share) | $ / shares						$ 1.83		$ 1.83
Fred Hutch | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Annual license maintenance payments								$ 50,000
Aggregate research payments due								$ 12,000,000
Term of collaborative arrangement for research								6 years
Research and development expense	100,000	100,000	200,000	400,000
Aggregate success payments	0		0
Term of success payment agreement								9 years
Trigger period from IPO date								1 year
Trigger period thereafter								2 years
Fair value of potential success payments due	300,000		300,000		$ 700,000
Success payment expense (reversal)	(700,000)	500,000	(300,000)	(600,000)
Fred Hutch | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Minimum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Multiple of initial equity value at issuance								10
Aggregate success payments								$ 10,000,000
Per share common stock price required for payment (in dollars per share) | $ / shares								$ 18.29
Fred Hutch | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Maximum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Multiple of initial equity value at issuance								50
Aggregate success payments								$ 200,000,000
Per share common stock price required for payment (in dollars per share) | $ / shares								$ 91.44
Stanford | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Annual license maintenance payments							$ 50,000
Aggregate research payments due						$ 12,000,000
Term of collaborative arrangement for research						4 years
Research and development expense	700,000	700,000	1,500,000	1,500,000
Aggregate success payments	0		0
Term of success payment agreement						9 years
Trigger period from IPO date						1 year
Trigger period thereafter						2 years
Fair value of potential success payments due	700,000		700,000		1,100,000
Success payment expense (reversal)	(800,000)	$ 600,000	(300,000)	$ 0
Success payment liability	$ 700,000		$ 700,000		$ 900,000
Stanford | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | License
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Potential milestone payments due							2,500,000
Stanford | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Minimum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Multiple of initial equity value at issuance						10
Aggregate success payments						$ 10,000,000
Per share common stock price required for payment (in dollars per share) | $ / shares						$ 18.29
Stanford | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Maximum
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Multiple of initial equity value at issuance						50
Aggregate success payments						$ 200,000,000
Per share common stock price required for payment (in dollars per share) | $ / shares						$ 91.44
Stanford | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Maximum | License
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Potential milestone payments due							$ 3,700,000