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Cash and Investments in Marketable Securities - Portfolio of Cash and Investments in Marketable Securities (Detail) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Gross Unrealized Losses |  | $ (700)
Cash | $ 18,726 | 1,250
Total cash and investments in marketable securities | 628,244 | 798,783
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 561,402 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | (3,742) |
Fair Value | 557,660 | 762,625
Level 2 | Corporate notes and bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 141,416 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | (1,505) |
Fair Value | 139,911 | 278,121
Level 2 | Corporate commercial paper |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 415,106 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | (2,232) |
Fair Value | 412,874 | 478,629
Level 2 | Obligations of U.S. government agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 4,880 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | (5) |
Fair Value | 4,875 | 5,875
Level 2 | Certificates of deposit |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments, fair value disclosure | 9,516 | 10,940
Level 1 | Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Investments, fair value disclosure | $ 42,342 | $ 23,968

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