Summary of Significant Accounting Policies - Net loss per share (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Subsidiary, Sale of Stock [Line Items] | ||
| Total | $ 17,163,593 | $ 11,862,272 |
| Options to purchase common stock | ||
| Subsidiary, Sale of Stock [Line Items] | ||
| Total | 12,524,968 | 8,830,836 |
| Unvested restricted common stock | ||
| Subsidiary, Sale of Stock [Line Items] | ||
| Total | $ 4,638,625 | $ 3,031,436 |