Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2014

Dilutive Shares Which Could Exist Pursuant to Exercise of Outstanding Stock Instruments and Which were not Included in Calculation

Dilutive shares which could exist pursuant to the exercise of outstanding stock instruments and which were not included in the calculation because their affect would have been anti-dilutive are as follows:

	September 30, 2014 (shares)		September 30, 2013 (shares)
Warrants to purchase shares of common stock		5,450,995		6,548,029
Options to purchase shares of common stock		3,328,517		3,507,005
Shares of common stock issuable upon conversion of preferred stock		2,527,103		2,618,772
		11,306,615		12,673,806