Financial instruments - Fair value of the convertible senior secured notes (Details) - Convertible senior secured notes - Financial liabilities at fair value through profit and loss category |
Jun. 30, 2025
$ / shares
Y
|
Dec. 31, 2024
Y
$ / shares
|
|---|---|---|
| Share price | ||
| Financial instruments | ||
| Significant unobservable input liabilities | 6.77 | 12.58 |
| Conversion price | ||
| Financial instruments | ||
| Significant unobservable input liabilities | 3.5 | 3.5 |
| Interest rate | ||
| Financial instruments | ||
| Significant unobservable input liabilities | 0.12 | 0.12 |
| Credit spread | ||
| Financial instruments | ||
| Significant unobservable input liabilities | 0.435 | 0.4064 |
| Expected life | ||
| Financial instruments | ||
| Significant unobservable input liabilities | Y | 3.5 | 4 |
| Risk-free rate | ||
| Financial instruments | ||
| Significant unobservable input liabilities | 0.037 | 0.044 |
| Volatility | ||
| Financial instruments | ||
| Significant unobservable input liabilities | 0.85 | 0.85 |