Statement Of Financial Position [Abstract]
| Concept |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||
| Assets [abstract] | ||||||||||||
| Property, plant and equipment | — | — | — |
57,890,000
EUR
|
18,535,000
EUR
|
— | — | — | — | — | — | — |
| Right-of-use assets | — | — | — |
1,448,000
EUR
|
1,753,000
EUR
|
— | — | — | — | — | — | — |
| Intangible assets other than goodwill | — | — | — |
2,637,000
EUR
|
2,353,000
EUR
|
— | — | — | — | — | — | — |
| Deferred tax assets | — | — | — |
16,000
EUR
|
8,960,000
EUR
|
— | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
49,928,000
EUR
|
104,274,000
EUR
|
— | — | — |
133,433,000
EUR
|
— | — | — |
| Assets | — | — | — |
136,039,000
EUR
|
149,334,000
EUR
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||
| Equity [abstract] | ||||||||||||
| Issued capital | — | — | — |
500,000
EUR
|
500,000
EUR
|
— | — | — | — | — | — | — |
| Retained earnings | — | — | — |
51,498,000
EUR
|
28,412,000
EUR
|
— | — | — | — | — | — | — |
| Share premium | — | — | — |
170,450,000
EUR
|
170,450,000
EUR
|
— | — | — | — | — | — | — |
| Equity |
170,450,000
EUR
|
500,000
EUR
|
51,498,000
EUR
|
119,452,000
EUR
|
142,538,000
EUR
|
170,450,000
EUR
|
28,412,000
EUR
|
500,000
EUR
|
151,144,000
EUR
|
19,806,000
EUR
|
170,450,000
EUR
|
500,000
EUR
|
| Liabilities [abstract] | ||||||||||||
| Liabilities | — | — | — |
16,587,000
EUR
|
6,796,000
EUR
|
— | — | — | — | — | — | — |
| Equity and liabilities | — | — | — |
136,039,000
EUR
|
149,334,000
EUR
|
— | — | — | — | — | — | — |