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Note 11 - Business Segments and Significant Customers (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 | Dec. 31, 2013
Segment Reporting [Abstract] |  |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |  |
|  | Year Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Greens Creek |  |  | 68.8 | % |  |  | 100.0 | % |  |  | 71.8 | %
Lucky Friday |  |  | 11.6 | % |  |  | — | % |  |  | 28.2 | %
Casa Berardi |  | 19.6 | % |  |  | — | % |  |  | — | %
|  |  | 100 | % |  |  | 100 | % |  |  | 100 | %
Schedule of Segment Reporting Information, by Segment [Table Text Block] |  |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Net sales to unaffiliated customers: |  |  |  |  |  |  |  |  |  |  |  |
Greens Creek |  | $ | 263,263 |  |  | $ | 320,895 |  |  | $ | 342,906 |
Lucky Friday |  |  | 44,204 |  |  |  | 248 |  |  |  | 134,728 |
Casa Berardi |  |  | 75,122 |  |  |  | — |  |  |  | — |
|  | $ | 382,589 |  |  | $ | 321,143 |  |  | $ | 477,634 |
Income (loss) from operations: |  |  |  |  |  |  |  |  |  |  |  |
Greens Creek |  | $ | 62,178 |  |  | $ | 138,245 |  |  | $ | 181,116 |
Lucky Friday |  |  | (3,563 | ) |  |  | (25,179 | ) |  |  | 75,608 |
Casa Berardi |  |  | (15,708 | ) |  |  | — |  |  |  | — |
Other |  |  | (75,301 | ) |  |  | (75,200 | ) |  |  | (59,079 | )
|  | $ | (32,394 | ) |  | $ | 37,866 |  |  | $ | 197,645 |
Capital additions (including non-cash additions): |  |  |  |  |  |  |  |  |  |  |  |
Greens Creek |  | $ | 57,119 |  |  | $ | 62,184 |  |  | $ | 41,657 |
Lucky Friday |  |  | 55,902 |  |  |  | 55,998 |  |  |  | 60,454 |
Casa Berardi |  |  | 41,425 |  |  |  | — |  |  |  | — |
Other |  |  | 8,162 |  |  |  | 11,760 |  |  |  | 35,274 |
|  | $ | 162,608 |  |  | $ | 129,942 |  |  | $ | 137,385 |
Depreciation, depletion and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Greens Creek |  | $ | 55,265 |  |  | $ | 43,522 |  |  | $ | 41,013 |
Lucky Friday |  |  | 7,833 |  |  |  | — |  |  |  | 6,053 |
Casa Berardi |  |  | 18,030 |  |  |  | — |  |  |  | — |
|  | $ | 81,128 |  |  | $ | 43,522 |  |  | $ | 47,066 |
Other significant non-cash items: |  |  |  |  |  |  |  |  |  |  |  |
Greens Creek |  | $ | 1,961 |  |  | $ | 4,037 |  |  | $ | 2,326 |
Lucky Friday |  |  | 96 |  |  |  | 92 |  |  |  | 14 |
Casa Berardi |  |  | 474 |  |  |  | — |  |  |  | — |
Other |  |  | 1,512 |  |  |  | 33,922 |  |  |  | 31,470 |
|  | $ | 4,043 |  |  | $ | 38,051 |  |  | $ | 33,810 |
Identifiable assets: |  |  |  |  |  |  |  |  |  |  |  |
Greens Creek |  | $ | 744,027 |  |  | $ | 741,666 |  |  | $ | 729,289 |
Lucky Friday |  |  | 313,793 |  |  |  | 226,196 |  |  |  | 213,285 |
Casa Berardi |  |  | 821,058 |  |  |  | — |  |  |  | — |
Other |  |  | 353,241 |  |  |  | 410,428 |  |  |  | 453,516 |
|  | $ | 2,232,119 |  |  | $ | 1,378,290 |  |  | $ | 1,396,090 |
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] |  |
|  | 2013 |  |  | 2012 |  |  | 2011 |
United States |  | $ | 22,361 |  |  | $ | 25,438 |  |  | $ | 24,409 |
Canada |  |  | 170,632 |  |  |  | 34,441 |  |  |  | 240,569 |
Japan |  |  | 50,039 |  |  |  | 70,371 |  |  |  | 60,963 |
Korea |  |  | 86,035 |  |  |  | 120,106 |  |  |  | 92,919 |
China |  |  | 50,479 |  |  |  | 72,133 |  |  |  | 51,635 |
Total, excluding gains/losses on forward contracts |  | $ | 379,546 |  |  | $ | 322,489 |  |  | $ | 470,495 |
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block] |
|  | 2013 |  |  | 2012 |
United States |  | $ | 1,053,374 |  |  | $ | 996,405 |
Canada |  |  | 738,172 |  |  |  | 198 |
Mexico |  |  | 55 |  |  |  | 56 |
|  | $ | 1,791,601 |  |  | $ | 996,659 |
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] |  |
|  | Year Ended December 31, |
|  | 2013 |  |  | 2012 |  |  | 2011 |
Teck Metals Ltd. |  |  | 25.0 | % |  |  | 10.7 | % |  |  | 51.1 | %
Korea Zinc |  |  | 22.5 | % |  |  | 37.2 | % |  |  | 18.4 | %
Trafigura AG |  |  | 8.8 | % |  |  | 22.4 | % |  |  | 12.4 | %
MS Zinc |  |  | 7.5 | % |  |  | 12.3 | % |  |  | 6.9 | %
CIBC |  |  | 10.9 | % |  |  | — | % |  |  | — | %

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- Definition Tabular disclosure of the names of foreign countries in which material long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets are located, and amount of such long-lived assets located in that country or foreign geographic area. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 + Details
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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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- Definition Tabular disclosure of the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 + Details
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