| Line Item | Dec 31, 2025 | Dec 31, 2024 | Dec 31, 2023 | Dec 31, 2022 | Dec 31, 2021 | Dec 31, 2020 | Dec 31, 2019 | Dec 31, 2018 | Dec 31, 2017 |
|---|---|---|---|---|---|---|---|---|---|
| Profit or loss [abstract] | |||||||||
| Revenues | |||||||||
| Cost of sales | |||||||||
| Research and development expenses | |||||||||
| Sales and marketing expenses | |||||||||
| General and administrative expenses | |||||||||
| Other operating expenses | |||||||||
| Other operating income | |||||||||
| Operating profit / (loss) | |||||||||
| Finance income | |||||||||
| Finance expenses | |||||||||
| Profit / (Loss) before tax | |||||||||
| Income taxes | |||||||||
| Net profit / (loss) | |||||||||
| Earnings / (Loss) per share | |||||||||
| Basic earnings for the period per share (in euros per share) | |||||||||
| Diluted earnings for the period per share (in euros per share) |