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Cash, Cash Equivalents and Investments - Components of Cash, Cash Equivalents and Investments (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Cash | $ 183,242 | $ 180,959
Money market instruments | 19,413 | 415
Cash and cash equivalents | 202,655 | 181,374
Debt securities, available-for-sale, current | 129,392 | 218,759
Non-current investments | 244,230 | 454,117
Total | 576,277 | 854,250
Treasury Bills [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt securities, available-for-sale, current | 0 | 11,332
Long-term investments | 43,523 | 44,214
Asset-Backed Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt securities, available-for-sale, current | 3,551 | 26,890
Long-term investments | 15,763 | 33,539
Corporate Bonds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt securities, available-for-sale, current | 124,851 | 164,055
Long-term investments | 183,965 | 374,440
Sovereign Bonds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt securities, available-for-sale, current | 990 | 0
Long-term investments | 979 | 1,924
Municipal Bonds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt securities, available-for-sale, current | 0 | 624
Agency Bonds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt securities, available-for-sale, current | $ 0 | $ 15,858

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