Statement Of Financial Position [Abstract]
| Concept |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
As at 2019-01-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — |
110,340,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
119,459,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — | — | — |
51,902,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
56,567,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Investment property | — | — | — | — | — |
400,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
400,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill | — | — | — | — | — |
1,265,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
1,609,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — | — | — |
349,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
181,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Non-current assets | — | — | — | — | — |
164,289,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
178,310,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||||||
| Current inventories | — | — | — | — | — |
375,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
312,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Current tax assets, current | — | — | — | — | — |
-
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
2,376,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Other current financial assets | — | — | — | — | — |
15,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
20,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — | — |
2,645,000
EUR
|
— | — | — | — |
1,579,000
EUR
|
— | — | — | — | — | — |
1,579,000
EUR
|
— | — | — | — | — | — |
505,000
EUR
|
— | — | — |
| Current assets | — | — | — | — | — |
77,558,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
63,677,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Assets | — | — | — | — | — |
241,847,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
241,987,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||
| Issued capital | — | — | — | — | — |
5,100,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
5,100,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — | — |
80,316,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
74,828,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — | — | — |
93,746,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
86,475,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — | — | — | — |
524,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
222,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Equity |
80,316,000
EUR
|
524,000
EUR
|
1,059,000
EUR
|
93,746,000
EUR
|
5,100,000
EUR
|
94,270,000
EUR
|
7,271,000
EUR
|
5,100,000
EUR
|
74,828,000
EUR
|
1,059,000
EUR
|
86,697,000
EUR
|
5,488,000
EUR
|
222,000
EUR
|
86,475,000
EUR
|
86,475,000
EUR
|
222,000
EUR
|
1,059,000
EUR
|
86,697,000
EUR
|
74,828,000
EUR
|
5,100,000
EUR
|
5,488,000
EUR
|
1,059,000
EUR
|
5,100,000
EUR
|
79,429,000
EUR
|
83,537,000
EUR
|
-
EUR
|
2,051,000
EUR
|
83,537,000
EUR
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||||||||||||
| Non-current provisions for employee benefits | — | — | — | — | — |
273,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
287,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Non-current liabilities | — | — | — | — | — |
51,896,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
78,901,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||||||||||||
| Current provisions for employee benefits | — | — | — | — | — |
2,042,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
2,390,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Current tax liabilities, current | — | — | — | — | — |
498,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
-
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Current liabilities | — | — | — | — | — |
95,681,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
76,389,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — | — |
147,577,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
155,290,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — | — | — |
241,847,000
EUR
|
— | — | — | — | — | — | — | — | — | — | — |
241,987,000
EUR
|
— | — | — | — | — | — | — | — | — | — |