Net Loss per Share

9 Months Ended

Sep. 30, 2011

Net Loss per Share

Net Loss per Share

4. 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 both periods as the result would be antidilutive. Such potentially dilutive shares are excluded when the effect would be to reduce net loss per share. Because the Company reported a net loss for the three and nine months ended September 30, 2010 and 2011, all potential common shares have been excluded from the computation of the dilutive net loss per share for all periods.  Such potential common shares consist of the following:

	September 30,
	2010	2011
Stock options	2,514,108	990,389
Unvested restricted stock	2,010,888	1,906,381
Warrants	27,952,358	22,653,964
	32,477,354	25,550,734