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Note 5 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

		Year Ended December 31,
		2015				2016				2017
Cayman Islands			489				894				2,045
U.S.			5,921				9,840				80,008
PRC			1,642				1,338				11,341
BVI			-				-				2,498
Australia			-				473				496
Net loss before income taxes			8,052				12,545				96,388

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

		Year Ended December 31,
		2015				2016				2017
Net loss before income taxes			8,052				12,545				96,388
Expected income tax benefit			2,818				4,391				33,736
Tax rate differential			297				581				5,796
Non-deductible expenses			(351	)			(152	)			(25,299	)
Deemed disposal gain*			-				-				(10,506	)
Impact of U.S. statutory tax rate change			-				-				(2,943	)
Non-taxable income			-				-				227
Others			28				(63	)			74
Change in valuation allowance			(2,792	)			(4,757	)			(1,085	)
Total income tax benefit			-				-				-

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

		December 31,
		2016				2017
Deferred tax assets:
Net operating loss carryforward			8,317				7,244
Intangible asset			428				329
Deferral of tax deduction of R&D expense			409				1,239
Share based compensation			-				1,427
Less: valuation allowance			(9,154	)			(10,239	)
Net deferred tax assets			-				-

X

- Definition

Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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- Definition

Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

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- Definition

Tabular disclosure of income before income tax between domestic and foreign jurisdictions.

+ 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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