Cash and Investments in Marketable Securities - Portfolio of Cash and Investments in Marketable Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Unrealized Losses		$ (1,800)
Cash	$ 12,131	8,798
Total cash and investments in marketable securities	409,432	504,977
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	351,647
Gross Unrealized Gains	0
Gross Unrealized Losses	(445)
Fair Value	351,202	427,726
Level 2 | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	21,466
Gross Unrealized Gains	0
Gross Unrealized Losses	(70)
Fair Value	21,396	83,522
Level 2 | Corporate commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	304,389
Gross Unrealized Gains	0
Gross Unrealized Losses	(370)
Fair Value	304,019	344,204
Level 2 | Obligations of U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	25,792
Gross Unrealized Gains	0
Gross Unrealized Losses	(5)
Fair Value	25,787	0
Level 2 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	7,502	21,399
Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	$ 38,597	$ 47,054