Statement Of Cash Flows [Abstract]
| Concept | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Adjustments for finance income | 
                                                741,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                413,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Cash flows from (used in) operations before changes in working capital | 
                                                21,197,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                25,994,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Increase (decrease) in working capital | 
                                                7,317,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                7,780,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for amortisation expense | 
                                                333,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                415,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for depreciation expense | 
                                                6,150,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                5,008,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from issue of ordinary shares | 
                                                0
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                239,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             |