Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
172,511,000
EUR
|
145,549,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill |
8,062,000
EUR
|
7,541,000
EUR
|
— |
| Goodwill |
15,272,000
EUR
|
15,272,000
EUR
|
— |
| Investments accounted for using equity method [abstract] | |||
| Investments accounted for using equity method |
1,823,000
EUR
|
1,509,000
EUR
|
— |
| Trade and other non-current receivables [abstract] | |||
| Other non-current receivables |
534,000
EUR
|
543,000
EUR
|
— |
| Miscellaneous non-current assets [abstract] | |||
| Non-current derivative financial assets |
2,012,000
EUR
|
5,087,000
EUR
|
— |
| Trade and other current receivables [abstract] | |||
| Current trade receivables |
4,870,000
EUR
|
9,624,000
EUR
|
— |
| Current receivables due from related parties |
2,815,000
EUR
|
2,447,000
EUR
|
— |
| Current prepayments and current accrued income other than current contract assets [abstract] | |||
| Current prepayments [abstract] | |||
| Current prepaid expenses |
1,287,000
EUR
|
597,000
EUR
|
— |
| Other current receivables |
12,105,000
EUR
|
9,039,000
EUR
|
— |
| Current prepayments and current accrued income including current contract assets [abstract] | |||
| Current accrued income including current contract assets [abstract] | |||
| Current contract assets |
855,000
EUR
|
1,154,000
EUR
|
— |
| Classes of current inventories [abstract] | |||
| Current inventories |
14,093,000
EUR
|
20,328,000
EUR
|
— |
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents |
5,838,000
EUR
|
11,271,000
EUR
|
32,506,000
EUR
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale |
659,000
EUR
|
0
EUR
|
— |
| Miscellaneous current assets [abstract] | |||
| Current restricted cash and cash equivalents |
7,140,000
EUR
|
6,373,000
EUR
|
— |
| Classes of other provisions [abstract] | |||
| Other provisions [abstract] | |||
| Other non-current provisions |
555,000
EUR
|
566,000
EUR
|
— |
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings |
83,503,000
EUR
|
58,446,000
EUR
|
— |
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current portion of non-current borrowings |
11,448,000
EUR
|
7,259,000
EUR
|
— |
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Current borrowings and current portion of non-current borrowings, by type [abstract] | |||
| Current bonds issued and current portion of non-current bonds issued |
529,000
EUR
|
3,670,000
EUR
|
— |
| Borrowings, by type [abstract] | |||
| Bonds issued |
78,539,000
EUR
|
76,511,000
EUR
|
— |
| Trade and other current payables [abstract] | |||
| Current trade payables |
9,308,000
EUR
|
11,988,000
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 contract liabilities |
662,000
EUR
|
592,000
EUR
|
— |
| Other current payables |
5,252,000
EUR
|
6,610,000
EUR
|
— |
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current derivative financial liabilities |
1,722,000
EUR
|
0
EUR
|
— |
| Other non-current liabilities |
208,000
EUR
|
230,000
EUR
|
— |
| Issued capital [abstract] | |||
| Issued capital |
612,000
EUR
|
600,000
EUR
|
— |
| Retained earnings [abstract] | |||
| Retained earnings |
28,717,000
EUR
|
15,408,000
EUR
|
— |
| Accumulated other comprehensive income [abstract] | |||
| Revaluation surplus |
55,668,000
EUR
|
38,326,000
EUR
|
— |
| Reserve of exchange differences on translation |
1,935,000
EUR
|
2,364,000
EUR
|
— |
| Reserve of cash flow hedges |
358,000
EUR
|
4,354,000
EUR
|
— |
| Miscellaneous equity [abstract] | |||
| Statutory reserve |
13,000
EUR
|
13,000
EUR
|
— |
| Net assets (liabilities) [abstract] | |||
| Assets |
277,424,000
EUR
|
253,694,000
EUR
|
— |
| Liabilities |
207,920,000
EUR
|
183,219,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | |||
| Current assets |
52,421,000
EUR
|
64,547,000
EUR
|
— |
| Current liabilities |
28,142,000
EUR
|
33,539,000
EUR
|
— |
| Assets less current liabilities [abstract] |