Net Income (Loss) Per Share Applicable to Common Stockholders

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

8. Net Income (Loss) Per Share Applicable to Common Stockholders

Basic net loss per share is calculated based on the weighted average number of common shares outstanding during the reporting period. Diluted loss per share is computed on the basis of the weighted average number of common shares plus dilutive potential common shares outstanding using the treasury stock method. The potentially dilutive securities are antidilutive due to the Company's net losses and are as follows for all periods presented (in thousands):

	Three Months Ended  March 31
	2011		2012
Common stock options		3,257		25,179
Common stock warrants		46,726		67,237
Convertible notes		29,750		34,638
Excluded potentially dilutive securities		79,733		127,054