Commitments and contingencies (Details) $ in Millions |
6 Months Ended |
|---|---|
|
Jun. 30, 2026
USD ($)
officer
lawsuit
| |
| Commitments and Contingencies Disclosure [Abstract] | |
| Number of class action lawsuits | lawsuit | 3 |
| Number of officers | officer | 2 |
| Proceeds from sale of royalty to Sprott | $ | $ 30.0 |
| Smelter royalty obligation, percentage | 1.50% |