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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2015

Computation of Basic and Diluted Net Loss per Share

The following table sets forth the reconciliation of the numerator and denominator used in the computation of basic and diluted net loss per share for the three and nine months ended September 30, 2015 and 2014 (in thousands, except per share amounts):

		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2015				2014				2015				2014
Numerator for Basic and Diluted:
Net loss used for basic calculation		$	(15,680	)		$	(10,759	)		$	(41,112	)		$	(18,573	)
Effect of revaluation of warrant liability			(1,109	)			(1,738	)			(4,698	)			(14,263	)
Adjusted net loss used for diluted calculation		$	(16,789	)		$	(12,497	)		$	(45,810	)		$	(32,836	)
Denominator:
Basic weighted average number of shares outstanding			96,864				75,194				95,347				73,407
Effect of dilutive potential shares			741				909				993				2,030
Diluted weighted average number of shares outstanding			97,605				76,103				96,340				75,437
Net loss per share:
Basic		$	(0.16	)		$	(0.14	)		$	(0.43	)		$	(0.25	)
Diluted		$	(0.17	)		$	(0.16	)		$	(0.48	)		$	(0.44	)

Anti-Dilutive Effect of Common Shares

The table below presents shares underlying stock options that are excluded from the calculation of the weighted average number of shares outstanding used for the calculation of diluted net loss per share. These are excluded from the calculation due to their anti-dilutive effect for the three and nine months ended September 30, 2015 and 2014 (in thousands):

		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2015				2014				2015				2014
Weighted average number of anti-dilutive potential shares:
Stock options			7,068				12,032				6,223				11,737

X

- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 260



-SubTopic 10



-Section 50



-Paragraph 1



-Subparagraph (c)



-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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X

- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 260



-SubTopic 10



-Section 50



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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