Fair value measurement - Silver stream embedded derivative, continuity schedule (Details) - Silver stream embedded derivative - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Continuity schedule for embedded derivative | ||
| Balance as of beginning of period | $ 16,163 | $ (3,090) |
| Change in fair value | 17,949 | 18,652 |
| Balance as of end of period | $ 34,112 | $ 15,562 |