Employees
| Concept | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2025-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2022-03-31 | As at 2022-03-31 | As at 2021-03-31 | As at 2021-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Employees | |||||||||||||||
| Information about reporting company | |||||||||||||||
| Number of employees of reporting company | |||||||||||||||
| Number of employees | 
                                                190
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                34
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                580
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                27
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                2,671
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                2,895
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                607
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                584
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                2,883
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                2,824
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                586
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                592
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                2,852
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                2,952
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                575
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Average number of temporary employees | 
                                                35
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                8
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                246
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                3
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                614
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                657
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                249
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                246
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                581
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                630
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                229
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                238
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                616
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                639
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                254
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |