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Note 5 - Income Taxes - Components of Losses Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net loss before income taxes	$ 96,388	$ 12,545	$ 8,052
CAYMAN ISLANDS
Net loss before income taxes	2,045	894	489
UNITED STATES
Net loss before income taxes	80,008	9,840	5,921
CHINA
Net loss before income taxes	11,341	1,338	1,642
VIRGIN ISLANDS, BRITISH
Net loss before income taxes	2,498
AUSTRALIA
Net loss before income taxes	$ 496	$ 473

X

- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

+ 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

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953

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-Topic 225
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-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
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-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
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-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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