NOTE 12. LOSS PER SHARE

Basic and diluted loss per share is computed by dividing loss attributable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted weighted average shares outstanding for the years ended December 31, 2015 and 2014 excludes shares underlying stock options and warrants and convertible preferred, since the effects would be anti-dilutive. Accordingly, basic and diluted loss per share is the same.

Such excluded shares are summarized as follows:

	Year Ended December 31,
	2015		2014
Common stock options		4,988,988		5,346,854
Restricted stock units (unvested)		-		160,702
Common shares issuable upon conversion of Series C Preferred Stock (not including dividends)		-		1,165,351
Common shares issuable upon conversion of Series D Preferred Stock (not including dividends and conversion premium paid in common stock)		3,852,000		-
Warrants		10,464,138		8,926,385
Total shares excluded from calculation		19,305,126		15,599,292