Net Loss per Common Share (Tables)

6 Months Ended

Jun. 30, 2017

Basic weighted average common shares outstanding, and the potentially dilutive securities excluded from loss per share computations because they are anti-dilutive, are as follows as of June 30, 2017 and 2016, respectively:

	Three Month Period Ended				Six Month Period Ended
	June 30,				June 30,
	2017		2016		2017		2016
Basic and diluted weighted average common stock shares outstanding		13,100,820		12,568,041		13,033,106		12,512,949
Potentially dilutive securities excluded from loss per share computations:
Common stock options		3,353,583		2,731,613		3,353,583		2,731,613
Common stock purchase warrants		7,460,283		7,745,997		7,460,283		7,745,997
Restricted stock unvested		272,976		137,502		272,976		137,502