Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2014

Computation of Basic and Diluted Net Loss per Share

The following table sets forth the computation of the basic and diluted net loss per share for the periods indicated (in thousands, except per share amounts):

		Three months endedJune 30,						Six months endedJune 30,
		2014			2013			2014			2013
Numerator:
Net loss	$	(6,779	)	$	(8,284	)	$	(19,367	)	$	(20,524	)
Denominator:
Weighted average shares used to compute basic and diluted net loss per share		31,790			30,780			31,701			30,677
Basic and diluted net loss per share	$	(0.21	)	$	(0.27	)	$	(0.61	)	$	(0.67	)

Potentially Dilutive Securities Excluded from Computation of Diluted Net Loss per Share Attributable to Common Stockholders

The Company has excluded the impact of outstanding employee stock options, restricted stock units, common stock warrants and shares expected to be issued under its employee stock purchase plan from the computation of diluted net loss per share, as their effect would have been antidilutive.  The shares potentially issuable for each of these outstanding awards at June 30, 2014 and 2013 were as follows (in thousands):

	June 30,
	2014		2013
Employee stock options		3,850		3,780
Restricted stock units		1,113		853
Employee stock purchase plan		255		245
Common stock warrants		4		4
		5,222		4,882