Disclosure Of Fair Value Measurement [Text Block]
| Concept | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of fair value measurement [text block] | — | — | — |  | — | — | — | — | — | — | — | — | — | 
| Disclosure of fair value measurement of assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of fair value measurement of assets [abstract] | |||||||||||||
| Disclosure of fair value measurement of assets [line items] | |||||||||||||
| Assets | — | — | — | — | 
                                                9,660,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                11,012,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
| Reconciliation of changes in fair value measurement, assets [abstract] | |||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of fair value measurement of equity [abstract] | |||||||||||||
| Disclosure of fair value measurement of equity [line items] | |||||||||||||
| Equity | 
                                                37,057,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,354,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                32,550,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
                                                6,861,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                8,230,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                37,057,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                31,181,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,354,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                4,364,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                924,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                4,233,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,055,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |