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 |
414,000
EUR
|
94,000
EUR
|
480,000
EUR
|
117,000
EUR
|
— | — |
| Intangible assets and goodwill [abstract] | ||||||
| Intangible assets other than goodwill [abstract] | ||||||
| Intangible assets other than goodwill |
14,000
EUR
|
-
EUR
|
17,000
EUR
|
-
EUR
|
— | — |
| Investment property [abstract] | ||||||
| Investment property |
29,616,000
EUR
|
20,797,000
EUR
|
24,133,000
EUR
|
15,774,000
EUR
|
— | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||||||
| Investments in subsidiaries reported in separate financial statements |
-
EUR
|
9,801,000
EUR
|
-
EUR
|
9,026,000
EUR
|
— | — |
| Miscellaneous non-current assets [abstract] | ||||||
| Non-current finance lease receivables |
589,000
EUR
|
589,000
EUR
|
778,000
EUR
|
778,000
EUR
|
— | — |
| Trade and other current receivables [abstract] | ||||||
| Trade and other current receivables |
196,000
EUR
|
94,000
EUR
|
228,000
EUR
|
606,000
EUR
|
— | — |
| Categories of current financial assets [abstract] | ||||||
| Current loans and receivables |
-
EUR
|
-
EUR
|
-
EUR
|
5,000,000
EUR
|
— | — |
| Cash and cash equivalents [abstract] | ||||||
| Cash and cash equivalents |
1,901,000
EUR
|
1,205,000
EUR
|
16,034,000
EUR
|
10,392,000
EUR
|
459,000
EUR
|
1,039,000
EUR
|
| Miscellaneous current assets [abstract] | ||||||
| Current finance lease receivables |
189,000
EUR
|
189,000
EUR
|
186,000
EUR
|
186,000
EUR
|
— | — |
| Classes of other provisions [abstract] | ||||||
| Other provisions [abstract] | ||||||
| Other non-current provisions |
259,000
EUR
|
259,000
EUR
|
1,617,000
EUR
|
1,617,000
EUR
|
— | — |
| Other current provisions |
34,000
EUR
|
34,000
EUR
|
23,000
EUR
|
23,000
EUR
|
— | — |
| Borrowings [abstract] | ||||||
| Non-current portion of non-current borrowings |
8,777,000
EUR
|
8,777,000
EUR
|
9,121,000
EUR
|
9,121,000
EUR
|
— | — |
| Current borrowings and current portion of non-current borrowings [abstract] | ||||||
| Current portion of non-current borrowings |
365,000
EUR
|
365,000
EUR
|
365,000
EUR
|
365,000
EUR
|
— | — |
| Non-current portion of non-current borrowings, by type [abstract] | ||||||
| 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 contract liabilities [abstract] | ||||||
| Non-current advances received, representing non-current contract liabilities for performance obligations satisfied at point in time |
124,000
EUR
|
124,000
EUR
|
162,000
EUR
|
162,000
EUR
|
— | — |
| Trade and other current payables [abstract] | ||||||
| Current trade payables |
1,675,000
EUR
|
1,579,000
EUR
|
83,000
EUR
|
117,000
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 advances received, representing current contract liabilities for performance obligations satisfied at point in time |
130,000
EUR
|
68,000
EUR
|
40,000
EUR
|
11,000
EUR
|
— | — |
| Miscellaneous current liabilities [abstract] | ||||||
| Other current liabilities |
542,000
EUR
|
495,000
EUR
|
610,000
EUR
|
580,000
EUR
|
— | — |
| Issued capital [abstract] | ||||||
| Issued capital |
11,689,000
EUR
|
11,689,000
EUR
|
19,068,000
EUR
|
19,068,000
EUR
|
— | — |
| Retained earnings [abstract] | ||||||
| Retained earnings |
3,640,000
EUR
|
3,400,000
EUR
|
5,757,000
EUR
|
5,517,000
EUR
|
— | — |
| Net assets (liabilities) [abstract] | ||||||
| Assets |
33,026,000
EUR
|
32,821,000
EUR
|
41,935,000
EUR
|
41,903,000
EUR
|
— | — |
| Liabilities |
12,740,000
EUR
|
12,535,000
EUR
|
13,064,000
EUR
|
13,032,000
EUR
|
— | — |
| Net current assets (liabilities) [abstract] | ||||||
| Current assets |
2,351,000
EUR
|
1,540,000
EUR
|
16,490,000
EUR
|
16,208,000
EUR
|
— | — |
| Current liabilities |
2,974,000
EUR
|
2,769,000
EUR
|
1,348,000
EUR
|
1,316,000
EUR
|
— | — |
| Assets less current liabilities [abstract] |