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Note 16 - Acquisitions - Preliminary Purchase Price Allocation (Details) (Parentheticals) - $ / shares |  |  | 1 Months Ended
--- | --- | --- | ---
Jul. 20, 2018 | Sep. 13, 2016 | Jun. 30, 2015
Klondex Mines Ltd [Member] |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | 75,276,176 |  |
Stock Issued, per share (in dollars per share) | $ 3.22 |  |
Business Acquisition, Share Price | $ 2.24 |  |
Revett Mining Company, Inc. [Member] |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares |  | 8,309,006 | 8,309,006
Business Acquisition, Share Price |  | $ 5.79 |

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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
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- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
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- Details
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