Income taxes - Unrecognized tax benefits (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Unrecognized Tax Benefits [Roll Forward] | ||
| Unrecognized tax benefits - beginning of year | $ 10,443 | $ 8,667 |
| Increases for tax positions taken during current years | 4,874 | 921 |
| Increases (decreases) for tax positions taken during prior years | 5,252 | 855 |
| Unrecognized tax benefits - end of year | $ 20,569 | $ 10,443 |
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|