Statement Of Comprehensive Income [Abstract]
| Concept | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||
| Profit (loss) | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Other comprehensive income [abstract] | ||||||
| Other comprehensive income | — | — | 
                                                0
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
                                                0
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Comprehensive income | — | — | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             |