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 | — |
22,362,000
EUR
|
— |
23,549,000
EUR
|
— |
49,451,000
EUR
|
49,447,000
EUR
|
— | — | — |
| Interest received, classified as operating activities | — |
13,000
EUR
|
— |
13,000
EUR
|
— |
53,000
EUR
|
53,000
EUR
|
— | — | — |
| Income taxes paid (refund), classified as operating activities | — |
-
EUR
|
— |
440,000
EUR
|
— |
27,000
EUR
|
-
EUR
|
— | — | — |
| Cash flows from (used in) operating activities | — |
22,375,000
EUR
|
— |
23,122,000
EUR
|
— |
49,477,000
EUR
|
49,500,000
EUR
|
— | — | — |
| Cash flows from (used in) investing activities [abstract] | ||||||||||
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
27,000
EUR
|
— |
27,000
EUR
|
— |
-
EUR
|
-
EUR
|
— | — | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
8,989,000
EUR
|
— |
9,030,000
EUR
|
— |
6,926,000
EUR
|
6,573,000
EUR
|
— | — | — |
| Proceeds from government grants, classified as investing activities | — |
302,000
EUR
|
— |
302,000
EUR
|
— |
289,000
EUR
|
289,000
EUR
|
— | — | — |
| Cash flows from (used in) investing activities | — |
15,313,000
EUR
|
— |
15,297,000
EUR
|
— |
9,583,000
EUR
|
9,230,000
EUR
|
— | — | — |
| Cash flows from (used in) financing activities [abstract] | ||||||||||
| Proceeds from borrowings, classified as financing activities | — |
26,829,000
EUR
|
— |
26,829,000
EUR
|
— |
26,829,000
EUR
|
26,829,000
EUR
|
— | — | — |
| Repayments of borrowings, classified as financing activities | — |
3,492,000
EUR
|
— |
3,492,000
EUR
|
— |
3,387,000
EUR
|
3,387,000
EUR
|
— | — | — |
| Payments of lease liabilities, classified as financing activities | — |
41,455,000
EUR
|
— |
41,459,000
EUR
|
— |
43,548,000
EUR
|
43,548,000
EUR
|
— | — | — |
| Dividends paid, classified as financing activities | — |
7,538,000
EUR
|
— |
7,538,000
EUR
|
— |
7,947,000
EUR
|
7,947,000
EUR
|
— | — | — |
| Other inflows (outflows) of cash, classified as financing activities | — |
146,000
EUR
|
— |
146,000
EUR
|
— |
474,000
EUR
|
474,000
EUR
|
— | — | — |
| Cash flows from (used in) financing activities | — |
27,973,000
EUR
|
— |
27,978,000
EUR
|
— |
30,683,000
EUR
|
30,683,000
EUR
|
— | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
9,715,000
EUR
|
— |
10,441,000
EUR
|
— |
9,211,000
EUR
|
9,587,000
EUR
|
— | — | — |
| Cash and cash equivalents |
61,517,000
EUR
|
— |
57,148,000
EUR
|
— |
51,076,000
EUR
|
— | — |
47,433,000
EUR
|
37,846,000
EUR
|
41,865,000
EUR
|