Profit Or Loss [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 | 
|---|---|---|---|---|---|---|
| Profit or loss [abstract] | ||||||
| Profit (loss) [abstract] | ||||||
| Profit (loss) from operating activities | — | — | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Profit (loss) before tax | — | — | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Tax expense (income) | — | — | 
                                                0
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
                                                0
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Profit (loss) | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Earnings per share [text block] | — | — | — | — | — | — | 
| Earnings per share [abstract] | ||||||
| Earnings per share [line items] | ||||||
| Basic earnings per share [abstract] | ||||||
| Basic earnings (loss) per share | — | — | 
                                                5.10
                                                
                                             | — | — | 
                                                5.66
                                                
                                             | 
| Diluted earnings per share [abstract] | ||||||
| Diluted earnings (loss) per share | — | — | 
                                                5.10
                                                
                                             | — | — | 
                                                5.66
                                                
                                             |