Fair Value Measurements - Summary of Financial Assets And Liabilities Measured at Fair Value on a Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Assets:
Cash equivalents	$ 334,181	$ 21,061
Liabilities:
Total liabilities		18,412
Level 1
Assets:
Cash equivalents	334,181	21,061
Level 3
Liabilities:
Total liabilities		18,412
Convertible promissory notes embedded derivative liability
Liabilities:
Total liabilities		18,183
Convertible promissory notes embedded derivative liability | Level 3
Liabilities:
Total liabilities		18,183
Warrant liability
Liabilities:
Total liabilities	613	229
Warrant liability | Level 3
Liabilities:
Total liabilities	$ 613	$ 229