Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
575,563,000
EUR
|
587,506,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
2,130,000
EUR
|
2,104,000
EUR
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in associates accounted for using equity method |
1,559,000
EUR
|
1,147,000
EUR
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
896,000
EUR
|
0
EUR
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
14,151,000
EUR
|
10,183,000
EUR
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
399,000
EUR
|
360,000
EUR
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
34,840,000
EUR
|
26,679,000
EUR
|
35,183,000
EUR
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale |
0
EUR
|
114,000
EUR
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
187,398,000
EUR
|
194,314,000
EUR
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings |
15,916,000
EUR
|
17,266,000
EUR
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Current borrowings and current portion of non-current borrowings, by type [abstract] | |||
| Trade and other non-current payables [abstract] | |||
| Non-current accruals and non-current deferred income including non-current contract liabilities [abstract] | |||
| Non-current deferred income including non-current contract liabilities [abstract] | |||
| Non-current deferred income other than non-current contract liabilities | — | — | — |
| Non-current government grants |
29,835,000
EUR
|
26,145,000
EUR
|
— |
| Trade and other non-current payables |
1,461,000
EUR
|
1,733,000
EUR
|
— |
| 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 deferred income other than current contract liabilities | — | — | — |
| Current government grants |
1,223,000
EUR
|
1,919,000
EUR
|
— |
| Trade and other current payables |
10,348,000
EUR
|
9,149,000
EUR
|
— |
| Trade and other payables [abstract] | |||
| Payables on social security and taxes other than income tax |
890,000
EUR
|
744,000
EUR
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Current derivative financial liabilities |
0
EUR
|
102,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
263,000,000
EUR
|
263,000,000
EUR
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Reserve of cash flow hedges |
0
EUR
|
102,000
EUR
|
— |
| Miscellaneous equity [abstract] | |||
| Statutory reserve |
21,271,000
EUR
|
20,262,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
629,538,000
EUR
|
628,093,000
EUR
|
— |
| Liabilities |
248,643,000
EUR
|
252,661,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
49,390,000
EUR
|
37,336,000
EUR
|
— |
| Current liabilities |
29 949
EUR
|
30,469,000
EUR
|
— |
| Assets less current liabilities [abstract] |