Net Loss Per Common Share (Tables)

6 Months Ended

Jun. 30, 2014

Net Loss Per Common Share

Schedule of anti-dilutive securities excluded from the calculation of diluted net loss per share

	June 30, 2014	December 31, 2013
Warrants for common stock	285,920	277,690
Common shares under option	1,526,240	1,401,101
Unvested restricted stock	13,127	16,703
Total potential dilutive shares	1,825,287	1,695,494