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Note 12 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

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

December 31,		2013				2012				2011
Deferred Tax Assets:
Net operating loss carryforwards		$	31,834			$	13,900			$	6,700
Research credits			4,792				2,300				2,100
Stock compensation expense			4,124				2,600				600
Other			487				400				900
Total deferred tax assets			41,237				19,200				10,300
Valuation allowance			(41,237	)			(19,200	)			(10,300	)
Net deferred tax assets		$	-			$	-			$	-

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

December 31,		2013				2012				2011
Tax benefit computed at 34%		$	(18,796	)		$	(7,937	)		$	(4,017	)
Stock compensation expense			513				176				148
Other			300				210				70
NOL not benefitted			17,983				7,551				3,799
Tax Provision (Benefit)		$	-			$	-			$	-

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

December 31,		2013				2012				2011
Unrecognized tax benefit:
At the beginning of the period		$	120			$	120			$	120
Gross increases – tax positions in the current period			-				-				-
Gross decreases – tax positions in the current period			-				-				-
At the end of the period		$	120			$	120			$	120

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Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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Tabular disclosure of the change in unrecognized tax benefits.

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-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 55

-Paragraph 217

-URI http://asc.fasb.org/extlink&oid=32707879&loc=d3e36027-109320



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