Note 11 - Net Loss Per Share Attributable to Common Stockholders

12 Months Ended

Dec. 31, 2015

11.

Net Loss per Share Attributable to Common Stockholders

As described in Note 2, Summary of Significant Accounting Policies, the Company computes basic and diluted loss per share using a methodology that gives effect to the impact of outstanding participating securities (the “two-class method”). As the years ended December 31, 2015, 2014 and 2013 resulted in net losses, there is no income allocation required under the two-class method or dilution attributed to weighted-average shares outstanding in the calculation of diluted loss per share.

The following Common Stock equivalents, presented on an as converted basis, were excluded from the calculation of net loss per share for the periods presented, due to their anti-dilutive effect (in thousands):

	Year Ended December 31,
	2015		2014			2013
Convertible preferred stock		-		7,581	(a)		4,254
Common stock warrants		-		660	(a)		660
Outstanding stock options		2,200		1,236			607
Convertible notes		-		243	(a)		243
		2,200		9,720			5,764

(a) These instruments were either exercised or converted to Common Stock during 2014.