Net Loss Per Common Share

6 Months Ended

Jun. 30, 2014

Net Loss Per Common Share

Net Loss Per Common Share

11. Net Loss Per Common Share

Basic net loss per share is calculated by dividing net loss by the weighted-average number of common shares outstanding during the period, without consideration for common stock equivalents. Diluted net loss per share is computed by dividing net loss by the weighted-average number of common stock equivalents outstanding for the period determined using the treasury-stock method. For purposes of this calculation, warrants for common stock, stock options and unvested restricted stock are considered to be common stock equivalents and are only included in the calculation of diluted net loss per share when their effect is dilutive. Interest expense for convertible debt that is dilutive is added back to net income in the calculation of diluted net loss per share.

The shares outstanding at the end of the respective periods presented below, after giving effect for the 1-for-6.986 reverse stock split, were excluded from the calculation of diluted net loss per share due to their anti-dilutive effect:

	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