Statement Of Cash Flows [Abstract]
| Concept | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2024-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | As at 2023-03-31 | 2022-04-01 to 2023-03-31 | As at 2022-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||
| Profit (loss) | — | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                580,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
                                                643,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Adjustments to reconcile profit (loss) [abstract] | |||||||||||
| Adjustments for depreciation and amortisation expense | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss | — | — | — | 
                                                35,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Adjustments for provisions | — | — | — | 
                                                90,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                123,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Other adjustments for non-cash items | — | — | — | 
                                                125,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                93,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Adjustments for losses (gains) on disposal of non-current assets | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                30,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Cash flows from (used in) operations | — | — | — | 
                                                533,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                572,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Dividends received, classified as operating activities | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Cash flows from (used in) operating activities | — | — | — | 
                                                533,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                572,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Cash flows from (used in) investing activities [abstract] | |||||||||||
| Cash flows from (used in) investing activities | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                50,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Cash flows from (used in) financing activities [abstract] | |||||||||||
| Proceeds from issuing shares | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Repayments of borrowings, classified as financing activities | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Cash flows from (used in) financing activities | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — | — | — | 
                                                533,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                522,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                736,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                736,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
                                                1 269
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
                                                1 791
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             |