Net Loss per Share

3 Months Ended

Mar. 31, 2012

Net Loss per Share

5. Net Loss per Share

Basic net loss per share is computed by dividing net loss by the weighted average number of common shares outstanding for the period. The Company's potential dilutive shares, which include outstanding common stock options, unvested restricted stock and warrants, have not been included in the computation of diluted net loss per share for any of the periods presented as the result would be antidilutive. Such potential common shares at March 31, 2012 and 2011 consist of the following:

	For the Three Months
	Ended March 31,
	2012		2011
Stock options		5,179,253		4,653,136
Unvested restricted common stock		1,061,828		248,752
Warrants		11,657,741		15,725,379
		17,898,822		20,627,267