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Shareholders’ equity (Details Narrative) - EUR (€) | 1 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Mar. 20, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Ordinary stock, shares issued |  |  | 19,146,468 | 18,289,866 |  | 18,289,866 | 18,216,958
Ordinary stock, shares outstanding |  |  | 19,146,468 | 18,289,866 | 19,146,468 | 18,289,866 | 18,216,958
Common shares reserved |  |  | 400,000 | 1,800,000 |  | 900,000 | 1,800,000
Fair value of the stock options grant |  |  | € 352,364 | € 232,768 |  |  |
Equity Incentive Plan 2021 - 2025 [Member] |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Common shares reserved |  |  |  |  |  | 1,800,000 |
Fair value of the stock options grant |  |  | € 424,360 |  |  |  |
American Depository Shares [Member] |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Shares issued | 856,602 | 72,908 |  |  |  |  |
Value of shares issued | € 2,977,061 | € 270,885 |  |  |  |  |

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