Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2017

Schedule of potential dilutive common shares


	At June 30,
	2017	2016
Stock options outstanding (1)	15,016,609	11,752,286
Restricted stock outstanding	248,077	204,444
Common stock warrants (2)	60,537,546	4,000,100
Preferred stock (3)	5,554,594	5,554,594
Number of dilutive potential common shares	81,356,826	21,511,424

(1)

During the three months ended June 30, 2017 and 2016, the Company granted 314,511 and 265,000 stock options, respectively. During the six months ended June 30, 2017 and 2016, the Company granted 450,863 and 280,000 stock options, respectively.

(2)

In February 2013, the Company issued 23,637,500 warrants as part of an underwritten public offering with an exercise price of $0.15 per warrant. Of these warrants issued in February 2013, 100 were unexercised as of June 30, 2017 and 2016.