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Note 6 - Business Segments - Information about Reportable Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Greens Creek [Member] |  |  |  |
Net sales to unaffiliated customers | $ 85,804 | $ 54,351 | $ 199,260 | $ 175,749
Income (loss) from operations | 26,498 | 21 | 49,407 | 24,664
Lucky Friday [Member] |  |  |  |
Net sales to unaffiliated customers | 26,140 | 13,916 | 70,152 | 48,376
Income (loss) from operations | 6,652 | (3,894) | 13,442 | (933)
Casa Berardi [Member] |  |  |  |
Net sales to unaffiliated customers | 41,131 | 36,674 | 126,614 | 104,105
Income (loss) from operations | 3,691 | (2,603) | 16,246 | (6,567)
San Sebastian [Member] |  |  |  |
Net sales to unaffiliated customers | 26,318 |  | 85,686 |
Income (loss) from operations | 18,415 | (2,420) | 58,911 | (7,269)
Other Segments [Member] |  |  |  |
Income (loss) from operations | (17,016) | (12,301) | (42,584) | (43,460)
Net sales to unaffiliated customers | 179,393 | 104,941 | 481,712 | 328,230
Income (loss) from operations | $ 38,240 | $ (21,197) | $ 95,422 | $ (33,565)

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + 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=63488584&loc=d3e20235-122688 + Details
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