Employees
| Concept | As at 2024-06-30 | As at 2024-06-30 | As at 2023-06-30 | As at 2023-06-30 | As at 2022-06-30 | As at 2022-06-30 | As at 2021-06-30 | As at 2021-06-30 | As at 2020-06-30 | 
|---|---|---|---|---|---|---|---|---|---|
| Employees | |||||||||
| Information about group | |||||||||
| Number of employees of group | |||||||||
| Number of employees | 
                                                208
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                314
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                204
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                322
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                315
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                195
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                301
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                179
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                169
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Average number of temporary employees | 
                                                10
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                10
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                11
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                11
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |