Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2014

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 income (loss) per share for the three months ended March 31, 2014, and 2013 (in thousands, except per share amounts):


	Three Months Ended
	March 31,
	2014			2013
Numerator for Basic and Diluted:
Net loss used for basic calculation	$	(225	)	$	(10,252	)
Effect of revaluation of warrant liability		(9,034	)		0

Adjusted net loss used for diluted calculation	$	(9,259	)	$	(10,252	)
Denominator:
Basic weighted average number of shares outstanding		72,088			59,730
Effect of dilutive potential shares		3,070			0

Diluted weighted average number of shares outstanding		75,158			59,730

Net loss per share:
Basic	$	(0.00	)	$	(0.17	)
Diluted	$	(0.12	)	$	(0.17	)

Anti-Dilutive Effect of Common Shares

The table below presents shares underlying stock options, employee stock purchase plan rights, warrants and restricted stock units 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 months ended March 31, 2014 and 2013 (shares in thousands):


	Three Months Ended
	March 31,
	2014		2013
Weighted average number of anti-dilutive potential shares		16,901		15,531