Cash Equivalents and Marketable Securities - Estimated Fair Value of Cash Equivalents and Marketable Securities and the Gross Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Cash equivalents, amortized cost	$ 69,900	$ 186,563
Cash equivalents, gross unrealized gains	0	6
Cash equivalents, gross unrealized losses	0	0
Cash equivalents, estimated fair value	69,900	186,569
Marketable securities, amortized cost	341,246	150,101
Marketable securities, gross unrealized gains	1,421	284
Marketable securities, gross unrealized losses	(20)	(1)
Marketable securities, estimated fair value	342,647	150,384
Money market funds
Debt Securities, Available-for-Sale [Line Items]
Cash equivalents, amortized cost	69,900	150,648
Cash equivalents, gross unrealized gains	0	0
Cash equivalents, gross unrealized losses	0	0
Cash equivalents, estimated fair value	69,900	150,648
Commercial paper
Debt Securities, Available-for-Sale [Line Items]
Cash equivalents, amortized cost		24,950
Cash equivalents, gross unrealized gains		5
Cash equivalents, gross unrealized losses		0
Cash equivalents, estimated fair value		24,955
Marketable securities, amortized cost	75,503	79,124
Marketable securities, gross unrealized gains	214	62
Marketable securities, gross unrealized losses	0	0
Marketable securities, estimated fair value	75,717	79,186
Corporate bonds
Debt Securities, Available-for-Sale [Line Items]
Marketable securities, amortized cost	26,457	32,984
Marketable securities, gross unrealized gains	76	81
Marketable securities, gross unrealized losses	(3)	(1)
Marketable securities, estimated fair value	26,530	33,064
U.S. government treasury securities
Debt Securities, Available-for-Sale [Line Items]
Cash equivalents, amortized cost		10,965
Cash equivalents, gross unrealized gains		1
Cash equivalents, gross unrealized losses		0
Cash equivalents, estimated fair value		10,966
Marketable securities, amortized cost	139,313	21,846
Marketable securities, gross unrealized gains	768	31
Marketable securities, gross unrealized losses	(9)	0
Marketable securities, estimated fair value	140,072	21,877
U.S. government agency securities
Debt Securities, Available-for-Sale [Line Items]
Marketable securities, amortized cost	99,973	16,147
Marketable securities, gross unrealized gains	363	110
Marketable securities, gross unrealized losses	(8)	0
Marketable securities, estimated fair value	$ 100,328	$ 16,257