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 |
107,612,000
EUR
|
110,340,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
477,000
EUR
|
1,265,000
EUR
|
— |
| Investment property [abstract] | |||
| Investment property |
425,000
EUR
|
400,000
EUR
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in joint ventures accounted for using equity method |
115,000
EUR
|
33,000
EUR
|
— |
| Trade and other current receivables [abstract] | |||
| Current trade receivables |
17,927,000
EUR
|
43,661,000
EUR
|
— |
| Current prepayments and current accrued income other than current contract assets [abstract] | |||
| Current prepayments [abstract] | |||
| Current prepayments |
2,472,000
EUR
|
1,307,000
EUR
|
— |
| Current receivables from taxes other than income tax | — | — | — |
| Current value added tax receivables |
50,000
EUR
|
-
EUR
|
— |
| Current prepayments and current accrued income including current contract assets [abstract] | |||
| Current accrued income including current contract assets [abstract] | |||
| Current contract assets |
12,944,000
EUR
|
29,555,000
EUR
|
— |
| Classes of current inventories [abstract] | |||
| Current raw materials and current production supplies [abstract] | |||
| Current raw materials and current production supplies |
612,000
EUR
|
375,000
EUR
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
73,201,000
EUR
|
2,645,000
EUR
|
1,579,000
EUR
|
| Trade and other current payables [abstract] | |||
| Current trade payables |
62,082,000
EUR
|
63,438,000
EUR
|
— |
| Current accruals and current deferred income including current contract liabilities [abstract] | |||
| Current deferred income including current contract liabilities [abstract] | |||
| Current contract liabilities [abstract] | |||
| Current contract liabilities |
37,713,000
EUR
|
14,319,000
EUR
|
— |
| Current payables on social security and taxes other than income tax | — | — | — |
| Current value added tax payables |
-
EUR
|
5,482,000
EUR
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Other non-current liabilities |
1,407,000
EUR
|
1,484,000
EUR
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Other current liabilities |
5,451,000
EUR
|
3,720,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
5,100,000
EUR
|
5,100,000
EUR
|
— |
| Miscellaneous equity [abstract] | |||
| Additional paid-in capital |
1,059,000
EUR
|
1,059,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
321,181,000
EUR
|
241,847,000
EUR
|
— |
| Liabilities |
218,084,000
EUR
|
147,577,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
107,206,000
EUR
|
77,558,000
EUR
|
— |
| Current liabilities |
115,688,000
EUR
|
95,681,000
EUR
|
— |
| Assets less current liabilities [abstract] |