Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
564,379,000
EUR
|
575,563,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
1,735,000
EUR
|
2,130,000
EUR
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in associates accounted for using equity method |
2,099,000
EUR
|
1,559,000
EUR
|
— |
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
303,000
EUR
|
896,000
EUR
|
— |
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables |
7,477,000
EUR
|
14,151,000
EUR
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
749,000
EUR
|
399,000
EUR
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
44,387,000
EUR
|
34,840,000
EUR
|
26,679,000
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 |
100,000
EUR
|
0
EUR
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
171,482,000
EUR
|
187,398,000
EUR
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings |
15,916,000
EUR
|
15,916,000
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 |
30,156,000
EUR
|
29,835,000
EUR
|
— |
| Trade and other non-current payables |
1,216,000
EUR
|
1,461,000
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 |
8,578,000
EUR
|
1,223,000
EUR
|
— |
| Trade and other current payables |
9,832,000
EUR
|
10,348,000
EUR
|
— |
| Trade and other payables [abstract] | |||
| Payables on social security and taxes other than income tax |
1,060,000
EUR
|
890,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
263,000,000
EUR
|
263,000,000
EUR
|
— |
| Retained earnings [abstract] | |||
| Retained earnings, profit (loss) for reporting period |
25,592,000
EUR
|
25,612,000
EUR
|
— |
| Retained earnings, excluding profit (loss) for reporting period |
25,791,000
EUR
|
26,534,000
EUR
|
— |
| Miscellaneous equity [abstract] | |||
| Statutory reserve |
22,115,000
EUR
|
21,271,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
621,229,000
EUR
|
629,538,000
EUR
|
— |
| Liabilities |
240,253,000
EUR
|
248,643,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
52,713,000
EUR
|
49,390,000
EUR
|
— |
| Current liabilities |
37,399,000
EUR
|
29,949,000
EUR
|
— |
| Assets less current liabilities [abstract] |