Net Loss per Share

3 Months Ended

Mar. 31, 2016

7. Net Loss per Share

Basic and diluted net loss per share is calculated by dividing the net loss by the weighted-average number of common shares outstanding for the period. The following items were excluded in the net loss per share calculation for the three months ended March 31, 2016 and 2015 because the inclusion of such items would have had an anti-dilutive effect:

	Three Months Ended
	March 31,
	2016		2015
Stock Options		2,168,917		1,913,263
Restricted stock units		48,745		79,588
Warrants to purchase common stock		5,688,278		5,918,943
Convertible debt		4,422,222		5,382,363