Share-Based Payments - Schedule of Share-based Compensation Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Share-based payments | ||
| Share-based compensation expense | $ 8,480 | $ 8,068 |
| Sage Therapeutics, Inc. | ||
| Share-based payments | ||
| Unrecognized compensation expense | 12,300 | |
| Research and development | ||
| Share-based payments | ||
| Share-based compensation expense | 1,535 | 1,412 |
| Selling, general and administrative | ||
| Share-based payments | ||
| Share-based compensation expense | $ 6,945 | $ 6,656 |