Note 7 - Income and Mining Taxes - Schedule of Changes in Valuation Allowance (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Income Tax Disclosure [Line Items] | |||
| Balance at beginning of year | $ (115,105) | $ (100,910) | $ (72,856) |
| Balance at end of year | (111,426) | (115,105) | (100,910) |
| Increase Due to Uncertainty of Recovery [Member] | |||
| Income Tax Disclosure [Line Items] | |||
| Valuation allowance, deferred tax asset | (7,113) | (16,965) | (21,114) |
| Decrease Related to Utilization and Expiration [Member] | |||
| Income Tax Disclosure [Line Items] | |||
| Valuation allowance, deferred tax asset | 10,792 | 2,770 | 1,137 |
| Klondex Mines Ltd [Member] | Business Acquisition [Member] | |||
| Income Tax Disclosure [Line Items] | |||
| Valuation allowance, deferred tax asset | $ 0 | $ 0 | $ (8,077) |