Cash and Investments in Marketable Securities - Portfolio of Cash and Investments in Marketable Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gross Unrealized Losses		$ (1,800)
Cash	$ 26,040	8,798
Total cash and investments in marketable securities	456,827	504,977
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	375,048
Gross Unrealized Gains	3
Gross Unrealized Losses	(692)
Fair Value	374,359	427,726
Level 2 | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	60,165
Gross Unrealized Gains	0
Gross Unrealized Losses	(271)
Fair Value	59,894	83,522
Level 2 | Corporate commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortized Cost	298,216
Gross Unrealized Gains	3
Gross Unrealized Losses	(421)
Fair Value	297,798	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	16,667
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	16,667	0
Level 2 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	7,503	21,399
Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	$ 48,925	$ 47,054