Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2015

Summary of Potentially Dilutive Shares of Common Stock

Because we reported a net loss for the three and six months ended June 30, 2015 and 2014, all potentially dilutive shares of common stock have been excluded from the computation of the dilutive net loss per share for all periods presented. As of June 30, 2015, the only outstanding warrants in-the-money were issued in June 2015, which are not exercisable until December 2015, and no material outstanding stock options were in-the-money, other than the options granted in 2015. See Notes 7 and 8 for further details. Such potentially dilutive shares of common stock consist of the following:

	June 30,
	2015		2014
Potentially dilutive securities, excluded:
Outstanding stock options		1,199,029		1,040,015
Unvested restricted stock units		629,383		610,700
Warrants to purchase common stock		26,179,634		9,371,002
		28,008,046		11,021,717