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Fair Value of Financial Instruments - Summary of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Amortized Cost	$ 340,562	$ 98,554
Unrealized Gains	348	22
Unrealized Losses	0	0
Estimated Fair Value	340,910	98,576
Money market funds | Cash and cash equivalents
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Amortized Cost	185,227	35,385
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	185,227	35,385
U.S. treasury securities | Short-term investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Amortized Cost	155,335	63,169
Unrealized Gains	348	22
Unrealized Losses	0	0
Estimated Fair Value	$ 155,683	$ 63,191

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