Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||||
| Property, plant and equipment [abstract] | ||||||
| Property, plant and equipment |
150,686
EUR
|
150,565
EUR
|
201,845
EUR
|
201,719
EUR
|
— | — |
| Intangible assets and goodwill [abstract] | ||||||
| Intangible assets other than goodwill [abstract] | ||||||
| Intangible assets other than goodwill |
456,000
EUR
|
279,000
EUR
|
496,000
EUR
|
288,000
EUR
|
— | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||||||
| Investments in subsidiaries reported in separate financial statements |
-
EUR
|
4,578
EUR
|
-
EUR
|
4,553
EUR
|
— | — |
| Investments in associates reported in separate financial statements |
226,000
EUR
|
226,000
EUR
|
256,000
EUR
|
256,000
EUR
|
— | — |
| Non-current prepayments and non-current accrued income including non-current contract assets [abstract] | ||||||
| Non-current accrued income including non-current contract assets [abstract] | ||||||
| Non-current contract assets |
-
EUR
|
-
EUR
|
349,000
EUR
|
349,000
EUR
|
— | — |
| Trade and other current receivables [abstract] | ||||||
| Trade and other current receivables |
11,643
EUR
|
10,636
EUR
|
10,646
EUR
|
9,941
EUR
|
— | — |
| Current prepayments and current accrued income including current contract assets [abstract] | ||||||
| Current accrued income including current contract assets [abstract] | ||||||
| Current contract assets |
612,000
EUR
|
612,000
EUR
|
1,311
EUR
|
1,311
EUR
|
— | — |
| Cash and cash equivalents [abstract] | ||||||
| Cash and cash equivalents |
61,517
EUR
|
57,148
EUR
|
51,076
EUR
|
47,433
EUR
|
37,846
EUR
|
41,865
EUR
|
| Miscellaneous current assets [abstract] | ||||||
| Current investments | — | — | — | — | — | — |
| Short-term deposits, not classified as cash equivalents |
-
EUR
|
-
EUR
|
24,000
EUR
|
24,000
EUR
|
— | — |
| Non-current portion of non-current borrowings, by type [abstract] | ||||||
| Non-current portion of non-current loans received |
116,044
EUR
|
116,044
EUR
|
92,704
EUR
|
92,704
EUR
|
— | — |
| Current borrowings and current portion of non-current borrowings, by type [abstract] | ||||||
| Current loans received and current portion of non-current loans received |
3,879
EUR
|
3,879
EUR
|
3,806
EUR
|
3,806
EUR
|
— | — |
| 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 |
5,771
EUR
|
5,771
EUR
|
5,817
EUR
|
5,817
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 contract liabilities [abstract] | ||||||
| Current contract liabilities |
3,838
EUR
|
3,838
EUR
|
3,810
EUR
|
3,810
EUR
|
— | — |
| Trade and other current payables |
3,695
EUR
|
3,513
EUR
|
7,946
EUR
|
7,720
EUR
|
— | — |
| Miscellaneous current liabilities [abstract] | ||||||
| Current derivative financial liabilities |
15,000
EUR
|
15,000
EUR
|
1,946
EUR
|
1,946
EUR
|
— | — |
| Issued capital [abstract] | ||||||
| Issued capital |
110,315
EUR
|
110,315
EUR
|
110,505
EUR
|
110,505
EUR
|
— | — |
| Retained earnings [abstract] | ||||||
| Retained earnings |
64,126
EUR
|
64,971
EUR
|
33,211
EUR
|
33,272
EUR
|
— | — |
| Accumulated other comprehensive income [abstract] | ||||||
| Reserve of exchange differences on translation |
82,000
EUR
|
-
EUR
|
72,000
EUR
|
-
EUR
|
— | — |
| Net assets (liabilities) [abstract] | ||||||
| Assets |
572,081
EUR
|
570,959
EUR
|
651,694
EUR
|
651,547
EUR
|
— | — |
| Net current assets (liabilities) [abstract] | ||||||
| Current assets |
78,841
EUR
|
73,463
EUR
|
91,695
EUR
|
87,329
EUR
|
— | — |
| Current liabilities |
61,416
EUR
|
61,075
EUR
|
62,271
EUR
|
61,991
EUR
|
— | — |
| Assets less current liabilities [abstract] |