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 |
438,877,277
EUR
|
425,978,241
EUR
|
417,136,694
EUR
|
403,335,743
EUR
|
— | — |
| Intangible assets and goodwill [abstract] | ||||||
| Intangible assets other than goodwill [abstract] | ||||||
| Intangible assets other than goodwill |
1,372,176
EUR
|
1,250,530
EUR
|
2,058,861
EUR
|
1,881,584
EUR
|
— | — |
| Investment property [abstract] | ||||||
| Investment property |
15,530,234
EUR
|
23,975,120
EUR
|
14,844,630
EUR
|
23,721,641
EUR
|
— | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||||||
| Investments in subsidiaries reported in separate financial statements |
0
EUR
|
4,048,063
EUR
|
0
EUR
|
4,533,063
EUR
|
— | — |
| Investments in associates reported in separate financial statements |
15,784,793
EUR
|
6,737,709
EUR
|
14,168,687
EUR
|
6,737,709
EUR
|
— | — |
| Trade and other non-current receivables [abstract] | ||||||
| Trade and other non-current receivables |
39,991
EUR
|
39,991
EUR
|
31,397
EUR
|
41,088
EUR
|
— | — |
| Miscellaneous non-current assets [abstract] | ||||||
| Non-current investments other than investments accounted for using equity method |
59,972,076
EUR
|
56,587,335
EUR
|
47,423,171
EUR
|
44,223,149
EUR
|
— | — |
| Other non-current assets |
9,650,187
EUR
|
9,650,187
EUR
|
1,089,144
EUR
|
1,089,144
EUR
|
— | — |
| Trade and other current receivables [abstract] | ||||||
| Trade and other current receivables |
47,326,339
EUR
|
46,773,388
EUR
|
41,632,400
EUR
|
41,192,593
EUR
|
— | — |
| Classes of current inventories [abstract] | ||||||
| Current inventories |
1,422,438
EUR
|
1,422,438
EUR
|
1,362,769
EUR
|
1,362,769
EUR
|
— | — |
| Classes of current inventories, alternative [abstract] | ||||||
| Cash and cash equivalents [abstract] | ||||||
| Cash and cash equivalents |
40,638,685
EUR
|
16,342,426
EUR
|
61,021,421
EUR
|
37,051,470
EUR
|
65,846,592
EUR
|
73,030,320
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 distribution to owners |
340,807
EUR
|
485,000
EUR
|
0
EUR
|
0
EUR
|
— | — |
| Borrowings [abstract] | ||||||
| Non-current portion of non-current borrowings |
60,688,522
EUR
|
60,688,522
EUR
|
71,209,697
EUR
|
71,209,697
EUR
|
— | — |
| Current borrowings and current portion of non-current borrowings [abstract] | ||||||
| Current borrowings |
10,521,175
EUR
|
10,521,175
EUR
|
10,521,175
EUR
|
10,521,175
EUR
|
— | — |
| Non-current portion of non-current borrowings, by type [abstract] | ||||||
| Trade and other non-current payables [abstract] | ||||||
| Trade and other non-current payables |
143,693
EUR
|
106,025
EUR
|
145,939
EUR
|
115,195
EUR
|
— | — |
| Trade and other current payables [abstract] | ||||||
| Trade and other current payables |
41,324,946
EUR
|
40,329,201
EUR
|
39,734,303
EUR
|
38,832,869
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 |
63,769,456
EUR
|
29,592,320
EUR
|
62,982,777
EUR
|
30,637,829
EUR
|
— | — |
| Accumulated other comprehensive income [abstract] | ||||||
| Revaluation surplus |
30,036,801
EUR
|
29,692,618
EUR
|
20,507,185
EUR
|
20,382,176
EUR
|
— | — |
| Net assets (liabilities) [abstract] | ||||||
| Assets |
634,103,258
EUR
|
596,417,076
EUR
|
607,399,743
EUR
|
571,650,069
EUR
|
— | — |
| Net current assets (liabilities) [abstract] | ||||||
| Current assets |
89,729,888
EUR
|
65,024,871
EUR
|
104,973,095
EUR
|
80,494,435
EUR
|
— | — |
| Current liabilities |
55,446,409
EUR
|
54,449,795
EUR
|
50,638,269
EUR
|
49,684,712
EUR
|
— | — |
| Assets less current liabilities [abstract] |