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 |
116,415,000
EUR
|
107,612,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
860,000
EUR
|
477,000
EUR
|
— |
| Investment property [abstract] | |||
| Investment property |
515,000
EUR
|
425,000
EUR
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments in joint ventures accounted for using equity method |
76,000
EUR
|
115,000
EUR
|
— |
| Trade and other current receivables [abstract] | |||
| Current trade receivables |
22,463,000
EUR
|
17,927,000
EUR
|
— |
| Current prepayments and current accrued income other than current contract assets [abstract] | |||
| Current prepayments [abstract] | |||
| Current prepayments |
2,102,000
EUR
|
2,472,000
EUR
|
— |
| Current receivables from taxes other than income tax | — | — | — |
| Current value added tax receivables |
-
EUR
|
50,000
EUR
|
— |
| Current prepayments and current accrued income including current contract assets [abstract] | |||
| Current accrued income including current contract assets [abstract] | |||
| Current contract assets |
18,315,000
EUR
|
12,944,000
EUR
|
— |
| Classes of current inventories [abstract] | |||
| Current raw materials and current production supplies [abstract] | |||
| Current raw materials and current production supplies |
427,000
EUR
|
612,000
EUR
|
— |
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
89,832,000
EUR
|
73,201,000
EUR
|
2,645,000
EUR
|
| Classes of other provisions [abstract] | |||
| Other provisions [abstract] | |||
| Other current provisions |
228,000
EUR
|
-
EUR
|
— |
| Trade and other current payables [abstract] | |||
| Current trade payables |
92,333,000
EUR
|
62,082,000
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 |
32,458,000
EUR
|
37,713,000
EUR
|
— |
| Current payables on social security and taxes other than income tax | — | — | — |
| Current value added tax payables |
4,172,000
EUR
|
-
EUR
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Other non-current liabilities |
810,000
EUR
|
1,407,000
EUR
|
— |
| Miscellaneous current liabilities [abstract] | |||
| Other current liabilities |
8,072,000
EUR
|
5,451,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
5,100,000
EUR
|
5,100,000
EUR
|
— |
| Retained earnings [abstract] | |||
| Retained earnings, profit (loss) for reporting period |
7,217,000
EUR
|
11,590,000
EUR
|
— |
| Retained earnings, excluding profit (loss) for reporting period |
91,266,000
EUR
|
84,527,000
EUR
|
— |
| Miscellaneous equity [abstract] | |||
| Additional paid-in capital |
1,059,000
EUR
|
1,059,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
357,303,000
EUR
|
321,181,000
EUR
|
— |
| Liabilities |
251,539,000
EUR
|
218,084,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
134,971,000
EUR
|
107,206,000
EUR
|
— |
| Current liabilities |
150,567,000
EUR
|
115,688,000
EUR
|
— |
| Assets less current liabilities [abstract] |