Stock-Based Compensation - Components of Stock-Based Compensation Expense (Details) - 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 expense | $ 83,518 | $ 74,758 | $ 258,002 | $ 716,532 |
| Cost of revenue | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Stock-based compensation expense | 212 | 70 | 633 | 389 |
| Research and development | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Stock-based compensation expense | 51,635 | 41,343 | 160,908 | 387,801 |
| Sales and marketing | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Stock-based compensation expense | 10,883 | 7,451 | 31,219 | 75,116 |
| General and administrative | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Stock-based compensation expense | $ 20,788 | $ 25,894 | $ 65,242 | $ 253,226 |