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Cash, Cash Equivalents, Restricted Cash and Marketable Securities - Summary of Cash, Cash Equivalents and Marketable Securities (Detail) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | $ 112,501 | $ 150,278
Unrealized Gains | 0 | 1
Unrealized Losses | 0 | 0
Estimated Fair Value | 112,501 | 150,279
Marketable Securities Available-for-Sale |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 624,012 | 591,177
Unrealized Gains | 162 | 1,179
Unrealized Losses | (1,063) | (333)
Estimated Fair Value | 623,111 | 592,023
Marketable Securities Available-for-Sale | Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 736,513 | 741,455
Unrealized Gains | 162 | 1,180
Unrealized Losses | (1,063) | (333)
Estimated Fair Value | 735,612 | 742,302
Cash | Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 8,267 | 11,190
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 8,267 | 11,190
Money Market Funds | Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 96,611 | 131,635
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 96,611 | 131,635
U.S. Treasuries | Marketable Securities Available-for-Sale |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 134,941 | 74,109
Unrealized Gains | 76 | 172
Unrealized Losses | (321) | (44)
Estimated Fair Value | 134,696 | 74,237
U.S. Government Agency Securities | Marketable Securities Available-for-Sale |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 172,341 | 216,265
Unrealized Gains | 48 | 692
Unrealized Losses | (305) | (269)
Estimated Fair Value | 172,084 | 216,688
Corporate Debt Securities | Cash and Cash Equivalents |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 7,623 | 7,453
Unrealized Gains | 0 | 1
Unrealized Losses | 0 | 0
Estimated Fair Value | 7,623 | 7,454
Corporate Debt Securities | Marketable Securities Available-for-Sale |  |
Cash Cash Equivalents And Marketable Securities [Line Items] |  |
Amortized Cost | 316,730 | 300,803
Unrealized Gains | 38 | 315
Unrealized Losses | (437) | (20)
Estimated Fair Value | $ 316,331 | $ 301,098

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