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Stock-Based Compensation - Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Options to purchase common stock |  |  |  |
Stock based compensation expense |  |  |  |
Options granted (in shares) |  |  | 264,000 |
Stock-based compensation expense | $ 40,973 | $ 35,103 | $ 76,060 | $ 58,335
Unrecognized compensation expense | 344,500 |  | $ 344,500 |
Unrecognized compensation expense, weighted average period of recognition |  |  | 2 years 9 months 18 days |
Options to purchase common stock | Cost of revenues |  |  |  |
Stock based compensation expense |  |  |  |
Stock-based compensation expense | 2,063 | 1,275 | $ 3,779 | 1,983
Options to purchase common stock | Research and development |  |  |  |
Stock based compensation expense |  |  |  |
Stock-based compensation expense | 12,458 | 6,616 | 21,879 | 10,490
Options to purchase common stock | Selling, general and administrative |  |  |  |
Stock based compensation expense |  |  |  |
Stock-based compensation expense | 26,452 | 27,212 | 50,402 | 45,862
Employee stock options |  |  |  |
Stock based compensation expense |  |  |  |
Stock-based compensation expense | 40,297 | 34,697 | 74,894 | 57,660
Employee stock options | Cost of revenues |  |  |  |
Stock based compensation expense |  |  |  |
Stock-based compensation expense | 2,063 | 1,275 | 3,779 | 1,983
Employee stock options | Research and development |  |  |  |
Stock based compensation expense |  |  |  |
Stock-based compensation expense | 11,938 | 6,276 | 20,944 | 9,926
Employee stock options | Selling, general and administrative |  |  |  |
Stock based compensation expense |  |  |  |
Stock-based compensation expense | 26,296 | 27,146 | $ 50,171 | 45,751
Non-employee stock options |  |  |  |
Stock based compensation expense |  |  |  |
Options granted (in shares) |  |  | 28,053 |
Stock-based compensation expense | 676 | 406 | $ 1,166 | 675
Non-employee stock options | Research and development |  |  |  |
Stock based compensation expense |  |  |  |
Stock-based compensation expense | 520 | 340 | 935 | 564
Non-employee stock options | Selling, general and administrative |  |  |  |
Stock based compensation expense |  |  |  |
Stock-based compensation expense | $ 156 | $ 66 | $ 231 | $ 111

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