Statement Of Cash Flows [Abstract]
| Concept |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||
| Profit (loss) | — |
71,472,000
EUR
|
71,472,000
EUR
|
71,472,000
EUR
|
62,934,000
EUR
|
— |
62,934,000
EUR
|
62,934,000
EUR
|
— |
| Adjustments to reconcile profit (loss) [abstract] | |||||||||
| Adjustments for income tax expense | — | — |
243,000
EUR
|
— | — | — |
228,000
EUR
|
— | — |
| Adjustments for decrease (increase) in inventories | — | — |
2,737,000
EUR
|
— | — | — |
4,042,000
EUR
|
— | — |
| Adjustments for depreciation and amortisation expense | — | — |
9,845,000
EUR
|
— | — | — |
9,748,000
EUR
|
— | — |
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss | — | — |
1,362,000
EUR
|
— | — | — |
1,698,000
EUR
|
— | — |
| Adjustments for unrealised foreign exchange losses (gains) | — | — |
1,134,000
EUR
|
— | — | — |
1,030,000
EUR
|
— | — |
| Adjustments for share-based payments | — | — |
760,000
EUR
|
— | — | — |
1,432,000
EUR
|
— | — |
| Other adjustments for non-cash items | — | — |
162,000
EUR
|
— | — | — |
80,000
EUR
|
— | — |
| Interest paid, classified as operating activities | — | — |
6,429,000
EUR
|
— | — | — |
7,172,000
EUR
|
— | — |
| Income taxes paid (refund), classified as operating activities | — | — |
2,000
EUR
|
— | — | — |
3,000
EUR
|
— | — |
| Cash flows from (used in) operating activities | — | — |
65,716,000
EUR
|
— | — | — |
39,267,000
EUR
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||
| Other cash payments to acquire interests in joint ventures, classified as investing activities | — | — |
0
EUR
|
— | — | — |
1,000,000
EUR
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — | — |
3,686,000
EUR
|
— | — | — |
3,005,000
EUR
|
— | — |
| Purchase of intangible assets, classified as investing activities | — | — |
69,000
EUR
|
— | — | — |
15,000
EUR
|
— | — |
| Interest received, classified as investing activities | — | — |
7,000
EUR
|
— | — | — |
13,000
EUR
|
— | — |
| Cash flows from (used in) investing activities | — | — |
3,748,000
EUR
|
— | — | — |
4,007,000
EUR
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||
| Proceeds from borrowings, classified as financing activities | — | — |
6,000,000
EUR
|
— | — | — |
0
EUR
|
— | — |
| Repayments of borrowings, classified as financing activities | — | — |
7,089,000
EUR
|
— | — | — |
7,167,000
EUR
|
— | — |
| Other inflows (outflows) of cash, classified as financing activities | — | — |
115,000
EUR
|
— | — | — |
50,000
EUR
|
— | — |
| Cash flows from (used in) financing activities | — | — |
1,204,000
EUR
|
— | — | — |
11,523,000
EUR
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — |
70,668,000
EUR
|
— | — | — |
54,797,000
EUR
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — |
522,000
EUR
|
— | — | — |
260,000
EUR
|
— | — |
| Cash and cash equivalents |
53,522,000
EUR
|
— | — | — | — |
123,668,000
EUR
|
— | — |
178,725,000
EUR
|