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Note 13 - Merger with Revett (Details) - Preliminary Purchase Price Allocation (Parentheticals) - Revett Mining Company, Inc. [Member] | Jun. 15, 2015 $ / shares shares
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Note 13 - Merger with Revett (Details) - Preliminary Purchase Price Allocation (Parentheticals) [Line Items] |
Hecla stock, per share | $ 3.06
Hecla stock, shares | shares | 6,252,646

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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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