Profit Or Loss [Abstract]
| Concept | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|
| Profit or loss [abstract] | ||||||||
| Profit (loss) [abstract] | ||||||||
| Revenue | — | 
                                                2,693,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                3,382,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Cost of sales | — | 
                                                1,450,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                2,532,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Gross profit | — | 
                                                1,243,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                850,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Profit (loss) from operating activities | — | 
                                                1,519,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                26,423,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Profit (loss) before tax | — | 
                                                1,478,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                26,446,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Tax expense (income) | — | 
                                                109,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                371,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Profit (loss), attributable to [abstract] | ||||||||
| Profit (loss), attributable to owners of parent | 
                                                0
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,369,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,369,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                26,817,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                26,817,000
                                                
                                                    
                                                        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 | — | 
                                                0.06
                                                
                                             | — | — | — | 
                                                1.17
                                                
                                             | — | — | 
| Diluted earnings per share [abstract] | ||||||||
| Diluted earnings (loss) per share | — | 
                                                0.06
                                                
                                             | — | — | — | 
                                                1.17
                                                
                                             | — | — |