Fair Value Measurements - Schedule of Fair Value of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Financial Assets:
Total financial assets	$ 484,477	$ 601,405
Liabilities:
Total liabilities	14,250	61,700
U.S. government treasury securities
Financial Assets:
Total financial assets	231,675	227,244
U.S. government agency securities
Financial Assets:
Total financial assets	64,914	86,681
Commercial paper
Financial Assets:
Total financial assets	61,085	165,130
Corporate bonds
Financial Assets:
Total financial assets	63,627	56,448
CVR liability
Liabilities:
Total liabilities	14,250	61,700
Money market funds
Financial Assets:
Total financial assets	63,176	65,902
Level 1
Financial Assets:
Total financial assets	294,851	293,146
Liabilities:
Total liabilities	0	0
Level 1 | U.S. government treasury securities
Financial Assets:
Total financial assets	231,675	227,244
Level 1 | U.S. government agency securities
Financial Assets:
Total financial assets	0	0
Level 1 | Commercial paper
Financial Assets:
Total financial assets	0	0
Level 1 | Corporate bonds
Financial Assets:
Total financial assets	0	0
Level 1 | CVR liability
Liabilities:
Total liabilities	0	0
Level 1 | Money market funds
Financial Assets:
Total financial assets	63,176	65,902
Level 2
Financial Assets:
Total financial assets	189,626	308,259
Liabilities:
Total liabilities	0	0
Level 2 | U.S. government treasury securities
Financial Assets:
Total financial assets	0	0
Level 2 | U.S. government agency securities
Financial Assets:
Total financial assets	64,914	86,681
Level 2 | Commercial paper
Financial Assets:
Total financial assets	61,085	165,130
Level 2 | Corporate bonds
Financial Assets:
Total financial assets	63,627	56,448
Level 2 | CVR liability
Liabilities:
Total liabilities	0	0
Level 2 | Money market funds
Financial Assets:
Total financial assets	0	0
Level 3
Financial Assets:
Total financial assets	0	0
Liabilities:
Total liabilities	14,250	61,700
Level 3 | U.S. government treasury securities
Financial Assets:
Total financial assets	0	0
Level 3 | U.S. government agency securities
Financial Assets:
Total financial assets	0	0
Level 3 | Commercial paper
Financial Assets:
Total financial assets	0	0
Level 3 | Corporate bonds
Financial Assets:
Total financial assets	0	0
Level 3 | CVR liability
Liabilities:
Total liabilities	14,250	61,700
Level 3 | Money market funds
Financial Assets:
Total financial assets	$ 0	$ 0