Net Loss Per Share (Details) - shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
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	12,185,378	10,320,073
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	12,088,710	10,260,073
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	96,668	60,000