Cash Equivalents and Marketable Securities - Summary of Amortized Cost and Fair Value of Cash Equivalents and Marketable Securities by Major Investment Category (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Cash and Cash Equivalents [Line Items]
Amortized Cost	$ 332,276	$ 452,119
Gross Unrealized Gain	114	26
Gross Unrealized Loss	(9)	(102)
Estimated Fair Value	332,381	452,043
Cash Equivalents
Cash and Cash Equivalents [Line Items]
Amortized Cost	266,774	362,254
Gross Unrealized Gain	14	6
Gross Unrealized Loss	0	(6)
Estimated Fair Value	266,788	362,254
Cash Equivalents | Money Market Funds
Cash and Cash Equivalents [Line Items]
Amortized Cost	221,344	306,801
Gross Unrealized Gain	0	0
Gross Unrealized Loss	0	0
Estimated Fair Value	221,344	306,801
Cash Equivalents | Commercial Paper
Cash and Cash Equivalents [Line Items]
Amortized Cost	45,430	42,455
Gross Unrealized Gain	14	6
Gross Unrealized Loss	0	0
Estimated Fair Value	45,444	42,461
Cash Equivalents | U.S Government and Agency Debt Securities
Cash and Cash Equivalents [Line Items]
Amortized Cost		12,998
Gross Unrealized Gain		0
Gross Unrealized Loss		(6)
Estimated Fair Value		12,992
Marketable Securities
Cash and Cash Equivalents [Line Items]
Amortized Cost	65,502	89,865
Gross Unrealized Gain	100	20
Gross Unrealized Loss	(9)	(96)
Estimated Fair Value	65,593	89,789
Marketable Securities | Commercial Paper
Cash and Cash Equivalents [Line Items]
Amortized Cost		47,534
Gross Unrealized Gain		17
Gross Unrealized Loss		(4)
Estimated Fair Value		47,547
Marketable Securities | U.S Government and Agency Debt Securities
Cash and Cash Equivalents [Line Items]
Amortized Cost		37,515
Gross Unrealized Gain		0
Gross Unrealized Loss		(91)
Estimated Fair Value		37,424
Marketable Securities | U.S. Government Securities
Cash and Cash Equivalents [Line Items]
Amortized Cost	41,923
Gross Unrealized Gain	54
Gross Unrealized Loss	(9)
Estimated Fair Value	41,968
Marketable Securities | Corporate Debt Securities
Cash and Cash Equivalents [Line Items]
Amortized Cost	23,579	4,816
Gross Unrealized Gain	46	3
Gross Unrealized Loss	0	(1)
Estimated Fair Value	$ 23,625	$ 4,818