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Investments in Marketable Securities - Summary of Investments Classified As Available-For-Sale Securities (Parenthetical) (Detail) | Sep. 30, 2024 USD ($) Security | Dec. 31, 2023 USD ($) | Sep. 30, 2023 USD ($) Security
--- | --- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |  |
Number of securities in unrealized gain position | Security | 270 |  | 49
Number of securities in unrealized loss position | Security | 58 |  | 115
Unrealized losses, aggregate | $ 218,000 | $ 254,000 |
Short-term investments – available for sale | 880,093,000 | 306,563,000 |
Unrealized gains, aggregate | 2,195,000 | 156,000 |
Cash equivalents [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Short-term investments – available for sale | 0 | 0 |
Corporate debt securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Unrealized losses, aggregate | 138,000 | 128,000 |
Short-term investments classified as available-for-sale, noncurrent | 189,800,000 |  |
Unrealized gains, aggregate | 1,954,000 | 148,000 |
Government debt securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Unrealized losses, aggregate | 80,000 | 126,000 |
Short-term investments classified as available-for-sale, noncurrent |  | 0 |
Unrealized gains, aggregate | 241,000 | $ 8,000 |
Maximum [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Unrealized gains, individually | 100,000 |  | $ 37,000
Unrealized losses, individually | 42,000 |  | 23,000
Unrealized losses, aggregate | 218,000 |  | 258,000
Unrealized gains, aggregate | $ 2,200,000 |  | $ 158,000

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