Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
2,588,000
EUR
|
5,705,000
EUR
|
7,769,000
EUR
|
| Miscellaneous current assets [abstract] | |||
| Current restricted cash and cash equivalents |
14,000
EUR
|
24,000
EUR
|
— |
| Current borrowings and current portion of non-current borrowings, by type [abstract] | |||
| Current bonds issued and current portion of non-current bonds issued |
104,040,000
EUR
|
95,462,000
EUR
|
— |
| Trade and other current payables [abstract] | |||
| Current trade payables |
39,000
EUR
|
41,000
EUR
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Other current liabilities |
548,000
EUR
|
472,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
6,856,000
EUR
|
6,856,000
EUR
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
461,973,000
EUR
|
433,840,000
EUR
|
— |
| Miscellaneous equity [abstract] | |||
| Reserve of share-based payments |
35,376,000
EUR
|
35,376,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
2,630,000
EUR
|
5,822,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
2,630,000
EUR
|
5,822,000
EUR
|
— |
| Current liabilities |
159,758,000
EUR
|
134,817,000
EUR
|
— |
| Assets less current liabilities [abstract] |