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Note 13 - Merger with Revett (Tables) | 9 Months Ended
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Sep. 30, 2015
Business Combinations [Abstract] |
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] |
Consideration: |  |  |  |
Cash |  | $ | 949 |
Hecla stock issued (6,252,646 shares at $3.06 per share) |  |  | 19,133 |
Total consideration |  | $ | 20,082 |
Fair value of net assets acquired: |  |  |  |
Assets: |  |  |  |
Cash |  | $ | 140 |
Accounts receivable |  |  | 137 |
Inventory - supplies |  |  | 629 |
Deferred tax assets |  |  | 7,137 |
Property, plants, equipment and mineral interests |  |  | 19,052 |
Reclamation insurance |  |  | 16,800 |
Other assets |  |  | 280 |
Total assets |  |  | 44,175 |
Liabilities: |  |  |  |
Accounts payable and accrued liabilities |  |  | 1,218 |
Notes payable |  |  | 4,061 |
Non-current reclamation liability |  |  | 18,814 |
Total liabilities |  |  | 24,093 |
Net assets |  | $ | 20,082 |
Business Acquisition, Pro Forma Information [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
(in thousands, except per share amounts) |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Sales of products |  | $ | 104,941 |  |  | $ | 135,507 |  |  | $ | 330,366 |  |  | $ | 378,802 |
Net income (loss) |  |  | (9,875 | ) |  |  | 1,626 |  |  |  | (26,155 | ) |  |  | (3,601 | )
Income (loss) applicable to common shareholders |  |  | (10,013 | ) |  |  | 1,524 |  |  |  | (26,569 | ) |  |  | (4,015 | )
Basic and diluted income (loss) per common share |  |  | (0.03 | ) |  |  | 0.00 |  |  |  | (0.07 | ) |  |  | (0.01 | )

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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- Definition Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
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