Net Loss Per Share

6 Months Ended

Jun. 30, 2011

Net Loss Per Share [Abstract]

Net Loss Per Share

3. Net Loss Per Share

Basic and diluted net loss per share have been computed based on net loss and the weighted-average number of common shares outstanding during the applicable period. For diluted net loss per share, common stock equivalents (common shares issuable upon the exercise of stock options and warrants) are excluded from the calculation of diluted net loss per share if their effect is antidilutive. The Company has excluded all options and warrants to purchase common stock, as such potential shares are antidilutive.

The following table sets forth the computation of historical basic and diluted net loss per share

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
Net loss	$	(5,258,971	)	$	(5,558,790	)	$	(12,729,631	)	$	(10,351,943	)
Weighted average common shares outstanding used to
compute basic earnings per share		75,071,418			61,835,222			68,789,220			61,698,884
Dilutive effect of:
Stock options		—			—			—			—
Warrants		—			—			—			—
Shares used to compute diluted earnings per share		75,071,418			61,835,222			68,789,220			61,698,884
Basic net loss per share	$	(0.07	)	$	(0.09	)	$	(0.19	)	$	(0.17	)
Diluted loss per share	$	(0.07	)	$	(0.09	)	$	(0.19	)	$	(0.17	)
Number of antidilutive stock options excluded from computation		6,325,299			5,660,098			6,325,299			5,660,098
Number of antidilutive warrants excluded from computation		10,732,147			13,460,107			10,732,147			13,460,107