INCOME TAXES - Maturities of the tax loss carryforwards (Details) - EUR (€) € in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| INCOME TAXES | |||
| Unlimited tax loss carryforwards for which no deferred tax assets | € 248,181 | € 239,160 | € 131,586 |
| Up to 5 years | |||
| INCOME TAXES | |||
| Unlimited tax loss carryforwards for which no deferred tax assets | 2,426 | 3,646 | 2,685 |
| Up to 10 years | |||
| INCOME TAXES | |||
| Unlimited tax loss carryforwards for which no deferred tax assets | 2,122 | 4,688 | 1,772 |
| Up to 15 years | |||
| INCOME TAXES | |||
| Unlimited tax loss carryforwards for which no deferred tax assets | € 823 | € 2,348 | € 4,508 |