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 2019-12-31 |
As at 2019-12-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||
| Assets [abstract] | ||||||||||||
| Property, plant and equipment |
1,218,000
EUR
|
— | — | — | — | — |
1,683,000
EUR
|
— | — | — | — | — |
| Right-of-use assets |
9,199,000
EUR
|
— | — | — | — | — |
16,040,000
EUR
|
— | — | — | — | — |
| Deferred tax assets |
140,000
EUR
|
— | — | — | — | — |
281,000
EUR
|
— | — | — | — | — |
| Cash and cash equivalents |
1,427,000
EUR
|
— | — | — | — | — |
264,000
EUR
|
— | — |
428,000
EUR
|
— | — |
| Assets |
16,477,000
EUR
|
— | — | — | — | — |
27,319,000
EUR
|
— | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||
| Equity [abstract] | ||||||||||||
| Issued capital |
5,408,000
EUR
|
— | — | — | — | — |
5,408,000
EUR
|
— | — | — | — | — |
| Retained earnings |
6,250,000
EUR
|
— | — | — | — | — |
341,000
EUR
|
— | — | — | — | — |
| Other reserves |
3,931,000
EUR
|
— | — | — | — | — |
4,045,000
EUR
|
— | — | — | — | — |
| Equity |
2,712,000
EUR
|
6,627,000
EUR
|
3,931,000
EUR
|
5,408,000
EUR
|
6,250,000
EUR
|
4,045,000
EUR
|
3,203,000
EUR
|
5,408,000
EUR
|
1,107,000
EUR
|
67,000
EUR
|
5,119,000
EUR
|
4,079,000
EUR
|
| Liabilities [abstract] | ||||||||||||
| Liabilities |
13,765,000
EUR
|
— | — | — | — | — |
24,116,000
EUR
|
— | — | — | — | — |
| Equity and liabilities |
16,477,000
EUR
|
— | — | — | — | — |
27,319,000
EUR
|
— | — | — | — | — |