Net Income (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Net Income (Loss) Per Share

For purposes of this calculation, common stock subject to repurchase by the Company and options are considered to be common stock equivalents and are only included in the calculation of diluted earnings per share when their effect is dilutive.

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
	(unaudited, in thousands, except per share amounts)
Numerator:
Net loss available to common stockholders	$	(5,695	)	$	(7,244	)	$	(10,862	)	$	(13,402	)
Denominator:
Weighted average shares outstanding - basic		38,518			37,247			38,118			36,932
Potential common shares - options (treasury stock method)		—			—			—			—
Weighted average shares outstanding - diluted		38,518			37,247			38,118			36,932
Shares excluded (anti-dilutive)		11			—			86			8
Shares excluded due to an exercise price greater than weighted average stock price for the period		2,090			2,323			1,347			1,457
Net loss per common share:
Basic	($	0.15	)	($	0.19	)	($	0.28	)	($	0.36	)
Diluted	($	0.15	)	($	0.19	)	($	0.28	)	($	0.36	)