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Stock-Based Compensation - Summary of Stock-based Compensation Expenses for Stock Options and Unvested Common Stock (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Stock-based compensation expense | $ 34,166 | $ 23,659
Cost of Sales [Member] |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Stock-based compensation expense | 1,063 | 1,005
Research and Development Expense [Member] |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Stock-based compensation expense | 17,392 | 12,366
Selling and Marketing Expense [Member] |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Stock-based compensation expense | 4,356 | 2,775
General and Administrative Expense [Member] |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Stock-based compensation expense | 10,442 | 5,915
Stock-based Compensation, Net Of Amounts Capitalized [Member] |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Stock-based compensation expense | 33,253 | 22,061
Capitalized Stock Based Compensation - Property And Equipment Net And Intangible Assets Net [Member] |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |
Stock-based compensation expense | $ 913 | $ 1,598

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