Intangible assets and goodwill - Schedule of Impaired Intangible Assets (Details) $ in Thousands |
6 Months Ended |
|---|---|
|
Sep. 30, 2026
USD ($)
| |
| GTX-104 [Member] | |
| Intangible assets – in-process research and development | |
| Balance | $ 27,595 |
| Impairment | 0 |
| Balance | 27,595 |
| GTX-102 [Member] | |
| Intangible assets – in-process research and development | |
| Balance | 9,196 |
| Impairment | (9,196) |
| Balance | 0 |
| GTX-101 [Member] | |
| Intangible assets – in-process research and development | |
| Balance | 4,337 |
| Impairment | (4,337) |
| Balance | 0 |
| In Process Research and Development [Member] | |
| Intangible assets – in-process research and development | |
| Balance | 41,128 |
| Impairment | (13,533) |
| Balance | $ 27,595 |