Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||||
| Property, plant and equipment [abstract] | ||||||
| Property, plant and equipment |
486,164,111
EUR
|
472,839,605
EUR
|
465,724,409
EUR
|
452,753,184
EUR
|
— | — |
| Intangible assets and goodwill [abstract] | ||||||
| Intangible assets other than goodwill [abstract] | ||||||
| Intangible assets other than goodwill |
1,229,848
EUR
|
1,150,434
EUR
|
841,090
EUR
|
759,814
EUR
|
— | — |
| Investment property [abstract] | ||||||
| Investment property |
15,519,622
EUR
|
15,802,948
EUR
|
15,088,082
EUR
|
15,386,143
EUR
|
— | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||||||
| Investments in subsidiaries reported in separate financial statements |
0
EUR
|
13,786,988
EUR
|
0
EUR
|
13,786,988
EUR
|
— | — |
| Investments in associates reported in separate financial statements |
17,479,166
EUR
|
6,737,709
EUR
|
16,898,490
EUR
|
6,737,709
EUR
|
— | — |
| Trade and other non-current receivables [abstract] | ||||||
| Trade and other non-current receivables |
39,991
EUR
|
39,991
EUR
|
39,991
EUR
|
39,991
EUR
|
— | — |
| Miscellaneous non-current assets [abstract] | ||||||
| Non-current investments other than investments accounted for using equity method |
71,451,014
EUR
|
70,741,014
EUR
|
59,949,023
EUR
|
57,463,248
EUR
|
— | — |
| Trade and other current receivables [abstract] | ||||||
| Trade and other current receivables |
56,385,708
EUR
|
55,705,905
EUR
|
60,363,391
EUR
|
59,393,154
EUR
|
— | — |
| Current prepayments and current accrued income including current contract assets [abstract] | ||||||
| Current accrued income including current contract assets [abstract] | ||||||
| Current contract assets |
1,109,031
EUR
|
1,109,031
EUR
|
253,653
EUR
|
253,653
EUR
|
— | — |
| Categories of current financial assets [abstract] | ||||||
| Current financial assets |
40,000,000
EUR
|
40,000,000
EUR
|
69,474,594
EUR
|
69,474,594
EUR
|
— | — |
| Classes of current inventories [abstract] | ||||||
| Current inventories |
2,499,728
EUR
|
2,499,728
EUR
|
2,091,082
EUR
|
2,091,082
EUR
|
— | — |
| Classes of current inventories, alternative [abstract] | ||||||
| Cash and cash equivalents [abstract] | ||||||
| Cash and cash equivalents |
106,297,764
EUR
|
92,255,286
EUR
|
81,628,977
EUR
|
53,282,798
EUR
|
94,749,216
EUR
|
69,095,661
EUR
|
| Miscellaneous assets [abstract] | ||||||
| Other assets |
16,191,555
EUR
|
15,792,111
EUR
|
535,707
EUR
|
535,707
EUR
|
— | — |
| Borrowings [abstract] | ||||||
| Non-current portion of non-current borrowings |
78,786,135
EUR
|
93,786,135
EUR
|
93,979,370
EUR
|
93,979,370
EUR
|
— | — |
| Current borrowings and current portion of non-current borrowings [abstract] | ||||||
| Current borrowings |
15,193,235
EUR
|
15,193,235
EUR
|
15,193,235
EUR
|
15,193,235
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 deferred income including non-current contract liabilities |
39,475,656
EUR
|
38,555,285
EUR
|
34,959,122
EUR
|
33,958,480
EUR
|
— | — |
| Trade and other non-current payables |
362,886
EUR
|
378,488
EUR
|
82,544
EUR
|
98,146
EUR
|
— | — |
| Trade and other current payables [abstract] | ||||||
| Trade and other current payables |
58,185,820
EUR
|
55,949,501
EUR
|
59,940,294
EUR
|
58,454,240
EUR
|
— | — |
| Issued capital [abstract] | ||||||
| Issued capital |
58,420,965
EUR
|
58,420,965
EUR
|
58,420,965
EUR
|
58,420,965
EUR
|
— | — |
| Retained earnings [abstract] | ||||||
| Retained earnings |
82,442,809
EUR
|
45,491,178
EUR
|
81,464,730
EUR
|
43,878,553
EUR
|
— | — |
| Accumulated other comprehensive income [abstract] | ||||||
| Revaluation surplus |
35,619,342
EUR
|
35,725,513
EUR
|
24,501,725
EUR
|
24,719,356
EUR
|
— | — |
| Net assets (liabilities) [abstract] | ||||||
| Assets |
814,367,538
EUR
|
788,460,750
EUR
|
774,226,552
EUR
|
733,439,080
EUR
|
— | — |
| Net current assets (liabilities) [abstract] | ||||||
| Current assets |
206,292,231
EUR
|
191,569,950
EUR
|
215,149,760
EUR
|
185,976,296
EUR
|
— | — |
| Current liabilities |
81,699,549
EUR
|
79,632,256
EUR
|
75,506,443
EUR
|
74,079,436
EUR
|
— | — |
| Assets less current liabilities [abstract] |