Statement Of Cash Flows [Abstract]
| Concept |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||
| Cash flows from (used in) operations | — |
61,738,236
EUR
|
— |
62,666,566
EUR
|
— |
70,663,308
EUR
|
69,087,713
EUR
|
— | — | — |
| Interest paid, classified as operating activities | — |
282,361
EUR
|
— |
284,599
EUR
|
— |
591,046
EUR
|
717,173
EUR
|
— | — | — |
| Income taxes paid (refund), classified as operating activities | — |
1,142,469
EUR
|
— |
1,217,739
EUR
|
— |
885,781
EUR
|
775,398
EUR
|
— | — | — |
| Cash flows from (used in) operating activities | — |
60,313,406
EUR
|
— |
61,164,228
EUR
|
— |
69,186,481
EUR
|
67,595,142
EUR
|
— | — | — |
| Cash flows from (used in) investing activities [abstract] | ||||||||||
| Interest received, classified as investing activities | — |
252,498
EUR
|
— |
260,738
EUR
|
— |
211,444
EUR
|
205,313
EUR
|
— | — | — |
| Cash flows from (used in) investing activities | — |
54,173,000
EUR
|
— |
54,649,227
EUR
|
— |
55,252,130
EUR
|
54,495,132
EUR
|
— | — | — |
| Cash flows from (used in) financing activities [abstract] | ||||||||||
| Payments of lease liabilities, classified as financing activities | — |
368,275
EUR
|
— |
416,562
EUR
|
— |
412,731
EUR
|
364,613
EUR
|
— | — | — |
| Dividends paid, classified as financing activities | — |
15,960,000
EUR
|
— |
15,960,000
EUR
|
— |
15,009,345
EUR
|
15,009,345
EUR
|
— | — | — |
| Cash flows from (used in) financing activities | — |
26,849,450
EUR
|
— |
26,897,737
EUR
|
— |
25,943,250
EUR
|
41,895,132
EUR
|
— | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
20,709,044
EUR
|
— |
20,382,736
EUR
|
— |
12,008,899
EUR
|
28,795,122
EUR
|
— | — | — |
| 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
|