Net Loss Per Share

9 Months Ended

Sep. 30, 2013

Net Loss Per Share [Abstract]

Net Loss Per Share

Note 8. Net Loss Per Share

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the year. Diluted net loss per common share is the same as basic net loss per common share, as the effect of the potential common stock equivalents is anti-dilutive and as such is excluded from the calculations of the diluted net loss per share.

The following number of shares outstanding, prior to the application of the treasury stock method, were excluded from the computation of diluted net loss per common share for the periods presented because including them would have had an anti-dilutive effect (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Options to purchase common stock		4,134		3,910		3,799		3,680
Restricted stock units		206		132		168		79
Performance stock units		34		16		34		14
Employee stock purchase plan shares		27		30		60		52
Total		4,401		4,088		4,061		3,825