Net Loss Per Share	9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per ShareBasic loss per common share is determined by dividing loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration of common stock equivalents. Diluted loss per share is computed by dividing the loss attributable to common stockholders by the weighted-average number of common stock equivalents outstanding for the period. The treasury stock method is used to determine the dilutive effect of the Company's stock option grants. 5,348,275 stock options (common stock equivalents) were excluded from the calculation of diluted loss per share for the three and nine months ended September 30, 2018 because their inclusion would have been anti-dilutive. 4,533,794 stock options were excluded from the calculation of diluted loss per share for the three and nine months ended September 30, 2017 because their inclusion would have been anti-dilutive.

Net Loss Per Share

9 Months Ended

Sep. 30, 2018

Net Loss Per ShareBasic loss per common share is determined by dividing loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period, without consideration of common stock equivalents. Diluted loss per share is computed by dividing the loss attributable to common stockholders by the weighted-average number of common stock equivalents outstanding for the period. The treasury stock method is used to determine the dilutive effect of the Company's stock option grants. 5,348,275 stock options (common stock equivalents) were excluded from the calculation of diluted loss per share for the three and nine months ended September 30, 2018 because their inclusion would have been anti-dilutive. 4,533,794 stock options were excluded from the calculation of diluted loss per share for the three and nine months ended September 30, 2017 because their inclusion would have been anti-dilutive.