Fair Value Measurements - Additional Information (Detail) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of cash held in money market funds	$ 225,100,000	$ 10,700,000
Cash and Cash Equivalents
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commercial paper, at carrying value	6,400,000
Corporate bonds ,at carrying value	4,800,000
Carrying value of cash held in commercial paper, government securities	12,100,000	2,500,000
Certificates of deposits		60,000,000.0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured using quoted prices	0	0
Assets measured using quoted prices	$ 0	$ 0