Note 6 - Income Taxes - Components of Income (Loss) from Operations Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income (Loss) from continuing operations	$ (33,264)	$ (7,557)	$ 89,659
Domestic Tax Authority [Member]
Income (Loss) from continuing operations	(44,513)	(7,920)	41,014
Foreign Tax Authority [Member]
Income (Loss) from continuing operations	$ 11,249	$ 363	$ 48,645

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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

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