Net Loss Per Share (Details) - shares	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Anti-dilutive securities
Potentially dilutive common shares that have not been included in the net loss per common share calculations because the effect would have been anti-dilutive	8,161,183	6,973,766
Stock options
Anti-dilutive securities
Potentially dilutive common shares that have not been included in the net loss per common share calculations because the effect would have been anti-dilutive	8,121,183	6,961,766
Restricted stock
Anti-dilutive securities
Potentially dilutive common shares that have not been included in the net loss per common share calculations because the effect would have been anti-dilutive	40,000	12,000