Cash and Investments in Marketable Securities - Portfolio of Cash and Investments in Marketable Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash	$ 6,247	$ 17,843
Total cash, cash equivalents, and investments in marketable securities	249,032	329,441
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	218,016
Gross Unrealized Gains	379
Gross Unrealized Losses	(17)
Fair Value	218,378	294,123
Level 2 | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	90,589
Gross Unrealized Gains	214
Gross Unrealized Losses	(10)
Fair Value	90,793	38,882
Level 2 | Corporate commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	125,927
Gross Unrealized Gains	163
Gross Unrealized Losses	(7)
Fair Value	126,083	255,241
Level 2 | Obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	1,500
Gross Unrealized Gains	2
Gross Unrealized Losses	0
Fair Value	1,502	0
Level 2 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	14,046	15,116
Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	$ 10,361	$ 2,359