Precious metals delivery and purchase agreement (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Apr. 03, 2019 |
|
| Disclosure of detailed information about property, plant and equipment [Line items] | |||
| Purchase agreement | $ 25.0 | ||
| Sandstorm Gold Ltd [Member] | |||
| Disclosure of detailed information about property, plant and equipment [Line items] | |||
| Right for Sandstorm to subscribe common shares | $ 1.9 | ||
| Credit-adjusted risk rate | 10.10% | 12.10% | |
| Reclassification from contract liability to retained earnings | $ 5.2 | ||