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Note 3 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Jul. 20, 2018
Deferred Tax Liabilities, Net, Total | $ 156,300 |  |
Income Tax Expense (Benefit), Total | (7,216) | $ 768 |
Klondex Mines Ltd [Member] |  |  |
Deferred Tax Liabilities, Net, Total |  |  | $ 60,200
Income Tax Expense (Benefit), Total | (2,500) |  |
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |  |
Deferred Tax Liabilities, Net, Total | 51,600 |  |
Foreign Tax Authority [Member] | Canada Revenue Agency [Member] |  |  |
Deferred Tax Liabilities, Net, Total | 107,800 |  |
Foreign Tax Authority [Member] | Mexican Tax Authority [Member] |  |  |
Deferred Tax Liabilities, Net, Total | $ 3,100 |  |

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