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, 2026
$ / shares
Y
|
Dec. 31, 2025
$ / shares
Y
|
|---|---|---|
| Share price | ||
| Financial instruments | ||
| Significant unobservable input liabilities | 1.74 | 5.33 |
| 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 | 0.5324 | 0.4657 |
| Risk free rate | ||
| Financial instruments | ||
| Significant unobservable input liabilities | 0.042 | 0.035 |
| Expected life (years) | ||
| Financial instruments | ||
| Significant unobservable input liabilities | Y | 4.5 | 3 |
| Dividend yield | ||
| Financial instruments | ||
| Significant unobservable input liabilities | 0 | 0 |
| Volatility | ||
| Financial instruments | ||
| Significant unobservable input liabilities | 0.85 | 0.85 |