Fair Value Measurements - Summary of Fair Value Hierarchy of Assets and Liabilities Measured on Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets:
Assets, fair value	$ 287,624	$ 124,582
Liabilities
Liabilities, fair value		4,200
Money Market Funds
Assets:
Cash equivalents	6,277	23,441
U.S. Treasury Bills
Assets:
Cash equivalents		23,832
U.S. Treasury Bills, Government Securities, and Government Agency Securities
Assets:
Short-term investments	281,347
U.S. Treasury Bills and Government Securities
Assets:
Short-term investments		77,309
Series B Preferred Stock Tranche Right Liability
Liabilities
Liabilities, fair value		4,200
Level 1
Assets:
Assets, fair value	6,277	23,441
Level 1 | Money Market Funds
Assets:
Cash equivalents	6,277	23,441
Level 2
Assets:
Assets, fair value	281,347	101,141
Level 2 | U.S. Treasury Bills
Assets:
Cash equivalents		23,832
Level 2 | U.S. Treasury Bills, Government Securities, and Government Agency Securities
Assets:
Short-term investments	$ 281,347
Level 2 | U.S. Treasury Bills and Government Securities
Assets:
Short-term investments		77,309
Level 3
Liabilities
Liabilities, fair value		4,200
Level 3 | Series B Preferred Stock Tranche Right Liability
Liabilities
Liabilities, fair value		$ 4,200