Employees
| Concept | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | As at 2022-03-31 | As at 2021-03-31 | As at 2020-03-31 | 
|---|---|---|---|---|---|---|---|---|
| Employees | ||||||||
| Information about reporting company | ||||||||
| Number of employees of reporting company | ||||||||
| Number of employees | 
                                                241
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                564
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                887
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                82
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                849
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                790
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                728
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                688
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Average number of temporary employees | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
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                                             | 
                                                
                                                
                                                    
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