Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-01-01 |
As at 2018-01-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||||||||||
| Property, plant and equipment [abstract] | |||||||||||
| Property, plant and equipment |
309 971
EUR
|
— |
2 534
EUR
|
2 729
EUR
|
312 650
EUR
|
— | — | — | — | — | — |
| Intangible assets and goodwill [abstract] | |||||||||||
| Intangible assets other than goodwill [abstract] | |||||||||||
| Intangible assets other than goodwill |
9 177
EUR
|
— |
5 057
EUR
|
4 799
EUR
|
8 137
EUR
|
— | — | — | — | — | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||||||||||
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements | — | — |
194 534
EUR
|
194 534
EUR
|
— | — | — | — | — | — | — |
| Trade and other current receivables [abstract] | |||||||||||
| Trade and other current receivables |
28 306
EUR
|
— |
25 339
EUR
|
22 654
EUR
|
25 796
EUR
|
— | — | — | — | — | — |
| Classes of current inventories [abstract] | |||||||||||
| Current inventories |
42 220
EUR
|
— |
40 854
EUR
|
48 872
EUR
|
50 105
EUR
|
— | — | — | — | — | — |
| Classes of current inventories, alternative [abstract] | |||||||||||
| Cash and cash equivalents [abstract] | |||||||||||
| Cash and cash equivalents |
54 236
EUR
|
— |
44 968
EUR
|
38 487
EUR
|
48 995
EUR
|
48 995
EUR
|
— | — |
38 487
EUR
|
16 280
EUR
|
4 845
EUR
|
| Classes of other provisions [abstract] | |||||||||||
| Other provisions [abstract] | |||||||||||
| Other non-current provisions |
700,000
EUR
|
— | — | — | — | — | — | — | — | — | — |
| Borrowings [abstract] | |||||||||||
| Non-current portion of non-current borrowings |
22 167
EUR
|
— | — | — |
25 667
EUR
|
— | — | — | — | — | — |
| Current borrowings and current portion of non-current borrowings [abstract] | |||||||||||
| Current borrowings |
3 500
EUR
|
— | — | — |
3 500
EUR
|
— | — | — | — | — | — |
| Non-current portion of non-current borrowings, by type [abstract] | |||||||||||
| Trade and other current payables [abstract] | |||||||||||
| Trade and other current payables |
5 725
EUR
|
— |
8 202
EUR
|
8 249
EUR
|
5 489
EUR
|
— | — | — | — | — | — |
| Issued capital [abstract] | |||||||||||
| Issued capital |
55 860
EUR
|
— |
55 860
EUR
|
55 860
EUR
|
55 860
EUR
|
— | — | — | — | — | — |
| Retained earnings [abstract] | |||||||||||
| Retained earnings |
111 169
EUR
|
— |
16 233
EUR
|
22 288
EUR
|
110 719
EUR
|
— | — | — | — | — | — |
| Accumulated other comprehensive income [abstract] | |||||||||||
| Revaluation surplus | — |
6 817
EUR
|
— | — | — | — |
6 593
EUR
|
6 593
EUR
|
— | — | — |
| Net assets (liabilities) [abstract] | |||||||||||
| Assets |
455 549
EUR
|
— |
324 497
EUR
|
329 051
EUR
|
463 079
EUR
|
— | — | — | — | — | — |
| Liabilities |
79 712
EUR
|
— |
27 537
EUR
|
26 033
EUR
|
80 527
EUR
|
— | — | — | — | — | — |
| Net current assets (liabilities) [abstract] | |||||||||||
| Current assets |
136 353
EUR
|
— |
122 072
EUR
|
126 599
EUR
|
141 876
EUR
|
— | — | — | — | — | — |
| Current liabilities |
36 222
EUR
|
— |
27 289
EUR
|
25 684
EUR
|
34 377
EUR
|
— | — | — | — | — | — |
| Assets less current liabilities [abstract] |