Stock-based compensation - Classification of expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Share-Based Compensation | ||||
| Stock-based compensation expense | $ 7,047 | $ 8,639 | $ 24,147 | $ 26,764 |
| Stock options | ||||
| Share-Based Compensation | ||||
| Stock-based compensation expense | 3,630 | 4,839 | 11,928 | 15,466 |
| Restricted and performance stock units | ||||
| Share-Based Compensation | ||||
| Stock-based compensation expense | 3,417 | 3,800 | 12,219 | 11,298 |
| Research and development | ||||
| Share-Based Compensation | ||||
| Stock-based compensation expense | 3,609 | 4,573 | 12,677 | 13,927 |
| Selling, general and administrative | ||||
| Share-Based Compensation | ||||
| Stock-based compensation expense | $ 3,438 | $ 4,066 | $ 11,470 | $ 12,837 |