| Line Item | Dec 31, 2025 | Dec 31, 2024 | Dec 31, 2023 | Dec 31, 2022 | Dec 31, 2021 | Dec 31, 2020 | Dec 31, 2019 | Dec 31, 2018 | Dec 31, 2017 |
|---|---|---|---|---|---|---|---|---|---|
| Profit or loss [abstract] | |||||||||
| Research and development expenses | |||||||||
| Administrative expenses | |||||||||
| Impairment of intangible assets | |||||||||
| Other income | |||||||||
| Net foreign exchange gains (losses) | |||||||||
| Operating loss | |||||||||
| Finance income | |||||||||
| Finance expense | |||||||||
| Loss before tax | |||||||||
| Income tax credit | |||||||||
| Loss for the year attributable to equity holders of the Company | |||||||||
| Basic loss per ordinary share | |||||||||
| Diluted loss per ordinary share |