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Note 14 - Acquisition of Klondex Mines Ltd. - Pro Forma Information (Details) - Klondex Mines Ltd [Member] - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Sales | $ 156,731 | $ 182,489 | $ 543,741 | $ 573,950
Net (loss) income | (20,735) | (8,877) | 4,694 | 2,523
(Loss) income applicable to common shareholders | $ (20,873) | $ (9,015) | $ 4,280 | $ (2,937)
Basic and diluted (loss) income per common share (in dollars per share) | $ (0.04) | $ (0.02) | $ 0.01 | $ (0.01)

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