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Stockholders' Equity - Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Stock-based compensation expenses | $ 10,599 | $ 16,899 | $ 36,665 | $ 59,409
Cost of revenues [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Stock-based compensation expenses | 354 | 423 | 1,139 | 1,256
Research and development [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Stock-based compensation expenses | 1,659 | 2,407 | 5,283 | 8,080
Selling and marketing [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Stock-based compensation expenses | 1,165 | 2,406 | 4,323 | 6,729
General and administrative [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Stock-based compensation expenses | $ 7,421 | $ 11,663 | $ 25,920 | $ 43,344

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