Other Assets (Details) - EUR (€) |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
Dec. 31, 2020 |
|
| Other Assets [Line Items] | ||||||
| Research and development | € 7,202,942 | € 10,016,870 | € 14,219,279 | € 17,318,680 | ||
| Other assets from research allowance | 5,863,947 | 5,863,947 | € 5,081,772 | |||
| Payment received | € 1,500,000 | 1,500,000 | € 700,000 | |||
| Other Assets [Member] | ||||||
| Other Assets [Line Items] | ||||||
| Research and development | € 4,600,000 | € 4,600,000 | ||||