Employee benefit plan (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Retirement Benefits [Abstract] | |||
| Defined contribution plan, vest percentage | 100.00% | ||
| Company contributions to 401 (k) plan | $ 1.4 | $ 1.0 | $ 0.7 |