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Note 5 - Income Taxes - Components of Income (Loss) from Operations Before Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income (Loss) from continuing operations | $ (3,640) | $ 96,975 | $ (30,658)
Domestic Tax Authority [Member] |  |  |
Income (Loss) from continuing operations | (7,920) | 41,014 | (65,895)
Foreign Tax Authority [Member] |  |  |
Income (Loss) from continuing operations | $ 4,280 | $ 55,961 | $ 35,237

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- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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