Net Loss Per Share

6 Months Ended

Jun. 30, 2013

Basic net loss per share is calculated by dividing the net loss by the weighted-average number of common shares outstanding for the period. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of unrestricted common shares and dilutive common share equivalents outstanding for the period, determined using the treasury-stock method and the as if-converted method. The basic and diluted net loss per share amounts for the three and six months ended June 30, 2013 and 2012 were computed based on the shares of common stock outstanding during the respective periods. Historical outstanding dilutive securities not included in the diluted loss per share calculation are as follows:



	June 30,
	2013	2012
Outstanding options to purchase common stock	5,308,861	4,132,858
Warrants to purchase common stock	609,016	609,016
Total	5,917,877	4,741,874

- Definition

The entire disclosure for earnings per share.

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