Stock-Based Compensation - Components of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | |||
| Stock-based compensation expense | $ 343,180 | $ 801,646 | $ 47,598 |
| Cost of revenue | |||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | |||
| Stock-based compensation expense | 875 | 620 | 101 |
| Research and development | |||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | |||
| Stock-based compensation expense | 213,515 | 441,629 | 23,825 |
| Sales and marketing | |||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | |||
| Stock-based compensation expense | 42,103 | 80,436 | 5,555 |
| General and administrative | |||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | |||
| Stock-based compensation expense | $ 86,687 | $ 278,961 | $ 18,117 |