Statement Of Financial Position [Abstract]
| Concept | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 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 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||
| Property, plant and equipment | — | — | — | 
                                                132,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                245,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                434,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
| Goodwill | — | — | — | 
                                                1,213,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,213,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                1,213,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
| Intangible assets other than goodwill | — | — | — | 
                                                2,537,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                3,247,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                3,946,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
| Cash and cash equivalents | — | — | — | 
                                                2,672,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,669,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                3,378,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
| Assets | — | — | — | 
                                                8,134,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                9,660,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                11,012,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
| Equity and liabilities [abstract] | ||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||
| Issued capital | — | — | — | 
                                                2,354,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,354,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                2,354,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
| Retained earnings | — | — | — | 
                                                32,890,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                32,087,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                30,609,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
| Share premium | — | — | — | 
                                                37,057,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                37,057,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                37,057,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
| Equity | 
                                                32,890,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                37,057,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,354,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                6,521,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                7,324,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                32,087,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                37,057,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,354,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                8,802,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                572,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,354,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                37,057,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                572,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                37,057,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                30,609,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                31,181,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,354,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                8,230,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Liabilities [abstract] | ||||||||||||||||||||
| Deferred tax liabilities | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | 
| Equity and liabilities | — | — | — | 
                                                8,134,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                9,660,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                11,012,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — |