Share capital (Details) - shares |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Nov. 29, 2022 |
Dec. 31, 2021 |
|---|---|---|---|---|---|
| Notes and other explanatory information [abstract] | |||||
| Number of shares authorised | 100,000,000 | 100,000,000 | 100,000,000 | ||
| [custom:NumberOfSharesAuthorisedEuro-0] | 1,000,000 | 1,000,000 | 1,000,000 | ||
| Number of shares issued | 25,000,000 | 20,000,000 | 12,258,458 | 12,258,458 | 0 |
| [custom:NumberOfSharesIssuedEuro-0] | 250,000 | 200,000 | 122,585 |