Statement Of Financial Position [Abstract]
| Concept |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||
| Assets [abstract] | |||||||||||||
| Non-current assets [abstract] | |||||||||||||
| Property, plant and equipment | — | — |
171,431,000
EUR
|
— | — |
193,907,000
EUR
|
— | — | — | — | — | — | — |
| Intangible assets other than goodwill | — | — |
2,987,000
EUR
|
— | — |
2,837,000
EUR
|
— | — | — | — | — | — | — |
| Deferred tax assets | — | — |
5,267,000
EUR
|
— | — |
10,587,000
EUR
|
— | — | — | — | — | — | — |
| Non-current assets | — | — |
241,914,000
EUR
|
— | — |
270,230,000
EUR
|
— | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||
| Current inventories | — | — |
95,285,000
EUR
|
— | — |
99,436,000
EUR
|
— | — | — | — | — | — | — |
| Cash and cash equivalents | — | — |
150,097,000
EUR
|
— | — |
141,514,000
EUR
|
— | — | — |
165,474,000
EUR
|
— | — | — |
| Current assets | — | — |
326,156,000
EUR
|
— | — |
331,886,000
EUR
|
— | — | — | — | — | — | — |
| Assets | — | — |
568,070,000
EUR
|
— | — |
602,116,000
EUR
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||
| Equity [abstract] | |||||||||||||
| Issued capital | — | — |
430,000
EUR
|
— | — |
430,000
EUR
|
— | — | — | — | — | — | — |
| Retained earnings | — | — |
446,514,000
EUR
|
— | — |
459,222,000
EUR
|
— | — | — | — | — | — | — |
| Equity |
434,000
EUR
|
446,514,000
EUR
|
93,944,000
EUR
|
459,222,000
EUR
|
430,000
EUR
|
89,887,000
EUR
|
9,085,000
EUR
|
539,594,000
EUR
|
539,594,000
EUR
|
107,256,000
EUR
|
10,646,000
EUR
|
430,000
EUR
|
443,414,000
EUR
|
| Liabilities [abstract] | |||||||||||||
| Non-current liabilities [abstract] | |||||||||||||
| Non-current provisions [abstract] | |||||||||||||
| Non-current provisions for employee benefits | — | — |
26,316,000
EUR
|
— | — |
28,738,000
EUR
|
— | — | — | — | — | — | — |
| Other non-current provisions | — | — |
2,273,000
EUR
|
— | — |
2,284,000
EUR
|
— | — | — | — | — | — | — |
| Deferred tax liabilities | — | — |
1,716,000
EUR
|
— | — |
1,353,000
EUR
|
— | — | — | — | — | — | — |
| Non-current liabilities | — | — |
325,959,000
EUR
|
— | — |
336,768,000
EUR
|
— | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||
| Current provisions [abstract] | |||||||||||||
| Other current provisions | — | — |
29,216,000
EUR
|
— | — |
38,867,000
EUR
|
— | — | — | — | — | — | — |
| Current tax liabilities, current | — | — |
1,056,000
EUR
|
— | — |
7,591,000
EUR
|
— | — | — | — | — | — | — |
| Current liabilities | — | — |
148,168,000
EUR
|
— | — |
175,461,000
EUR
|
— | — | — | — | — | — | — |
| Equity and liabilities | — | — |
568,070,000
EUR
|
— | — |
602,116,000
EUR
|
— | — | — | — | — | — | — |