SEGMENT AND GEOGRAPHIC INFORMATION - Non-current assets (Details) - EUR (€) € in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| SEGMENT AND GEOGRAPHIC INFORMATION | ||
| Non-current assets | € 29,495 | € 28,034 |
| Germany | ||
| SEGMENT AND GEOGRAPHIC INFORMATION | ||
| Non-current assets | 28,058 | 25,833 |
| China | ||
| SEGMENT AND GEOGRAPHIC INFORMATION | ||
| Non-current assets | 966 | 1,741 |
| Other | ||
| SEGMENT AND GEOGRAPHIC INFORMATION | ||
| Non-current assets | € 471 | € 460 |