Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
395,157,000
EUR
|
361,718,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
4,941,000
EUR
|
5,484,000
EUR
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in joint ventures accounted for using equity method |
45,000
EUR
|
45,000
EUR
|
— |
| Trade and other current receivables [abstract] | |||
| Current trade receivables |
8,283,000
EUR
|
2,558,000
EUR
|
— |
| Current prepayments and current accrued income other than current contract assets [abstract] | |||
| Current prepayments [abstract] | |||
| Current prepayments |
1,883,000
EUR
|
1,622,000
EUR
|
— |
| Other current receivables |
34,867,000
EUR
|
892,000
EUR
|
— |
| Current prepayments and current accrued income including current contract assets [abstract] | |||
| Categories of current financial assets [abstract] | |||
| Current loans and receivables |
167,082,000
EUR
|
232,008,000
EUR
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
41,000
EUR
|
3,000
EUR
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
634,000
EUR
|
499,000
EUR
|
1,819,000
EUR
|
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
28,143,000
EUR
|
34,285,000
EUR
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings |
43,000
EUR
|
-
EUR
|
— |
| Current portion of non-current borrowings |
6,143,000
EUR
|
6,143,000
EUR
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Current accruals and current deferred income including current contract liabilities [abstract] | |||
| Current deferred income including current contract liabilities [abstract] | |||
| Current contract liabilities [abstract] | |||
| Current advances received, representing current contract liabilities for performance obligations satisfied at point in time |
29,602,000
EUR
|
35,506,000
EUR
|
— |
| Trade and other current payables |
56,153,000
EUR
|
70,146,000
EUR
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Other non-current liabilities |
1,880,000
EUR
|
34,392,000
EUR
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Other current liabilities |
7,770,000
EUR
|
12,307,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
146,256,000
EUR
|
146,256,000
EUR
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
48,386,000
EUR
|
49,484,000
EUR
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Revaluation surplus |
23,320,000
EUR
|
-
EUR
|
— |
| Miscellaneous equity [abstract] | |||
| Statutory reserve |
12,105,000
EUR
|
14,626,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
677,417,000
EUR
|
718,545,000
EUR
|
— |
| Liabilities |
438,731,000
EUR
|
551,565,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
264,797,000
EUR
|
334,621,000
EUR
|
— |
| Current liabilities |
138,674,000
EUR
|
412,553,000
EUR
|
— |
| Assets less current liabilities [abstract] |