Disclosure Of Cash Flow Statement [Text Block]
| Concept | 
                                    
                                        As at 2024-03-31  | 
                            
                                
                                    
                                        As at 2023-03-31  | 
                            
                                
                                    
                                        As at 2022-03-31  | 
                            
                        
|---|---|---|---|
| Disclosure of cash flow statement [text block] | — | — | — | 
| Cash and cash equivalents if different from statement of financial position [abstract] | |||
| Cash and cash equivalents | 
                                        
                                             
                                                31,597,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                17,569,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Bank overdrafts | 
                                        
                                             
                                                5,345,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                44,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Cash and cash equivalents if different from statement of financial position | 
                                        
                                             
                                                26,252,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                17,525,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                24,838,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     |