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Note 6 - Business Segments (Details) - Information About Reportable Segments (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Net sales to unaffiliated customers: |  |  |  |
Net sales to unaffiliated customers | $ 135,507 | $ 106,629 | $ 378,796 | $ 268,409
Income (loss) from operations: |  |  |  |
Income (loss) from operations | 6,271 | 1,741 | 19,215 | (33,094)
Greens Creek [Member] |  |  |  |
Net sales to unaffiliated customers: |  |  |  |
Net sales to unaffiliated customers | 67,763 | 64,845 | 186,808 | 207,576
Income (loss) from operations: |  |  |  |
Income (loss) from operations | 8,874 | 15,310 | 28,724 | 51,164
Lucky Friday [Member] |  |  |  |
Net sales to unaffiliated customers: |  |  |  |
Net sales to unaffiliated customers | 27,883 | 14,395 | 71,740 | 23,324
Income (loss) from operations: |  |  |  |
Income (loss) from operations | 9,007 | 402 | 20,105 | (6,210)
Casa Berardi [Member] |  |  |  |
Net sales to unaffiliated customers: |  |  |  |
Net sales to unaffiliated customers | 39,861 | 27,389 | 120,248 | 37,509
Income (loss) from operations: |  |  |  |
Income (loss) from operations | 395 | 572 | 4,940 | (12,784)
Other Segments [Member] |  |  |  |
Income (loss) from operations: |  |  |  |
Income (loss) from operations | $ (12,005) | $ (14,543) | $ (34,554) | $ (65,264)

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- Definition Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4613673-111683 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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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=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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