Description of Business and Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2012

Common Shares Excluded from Calculation of Net Loss Per Common Share

The following table sets forth the potential common shares excluded from the calculation of net loss per common share because their inclusion would be anti-dilutive:

	September 30,
	2012		2011
RXi options to purchase common stock		63,847,938		—
Common stock underlying Series A Preferred Stock		700,160,312		—
Warrants to purchase common stock		138,462		—
Total		764,146,712		—