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Stockholders' Equity - Stock-Based Compensation Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expenses $ 4,027 $ 10,599 $ 17,375 $ 36,665
Cost of revenues [Member]        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expenses 139 354 602 1,139
Research and development [Member]        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expenses 1,055 1,659 4,216 5,283
Selling and marketing [Member]        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expenses 391 1,165 1,555 4,323
General and administrative [Member]        
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Stock-based compensation expenses $ 2,442 $ 7,421 $ 11,002 $ 25,920