Net loss per share

12 Months Ended

Dec. 31, 2018

Basic net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted-average number of common shares and dilutive common stock equivalents outstanding for the period, determined using the treasury stock method and the if-converted method, for convertible securities, if inclusion of these is dilutive.

Because the Company has reported net losses for the periods presented, diluted net loss per common share is the same as basic net loss per common share.

The following potentially dilutive securities outstanding, prior to the use of the treasury stock method or if-converted method, have been excluded from the computation of diluted weighted-average shares outstanding for the periods indicated, because including them would have had an anti-dilutive impact:



	Year Ended December 31, 2018	Year Ended December 31, 2017	Year Ended December 31, 2016
Options to purchase common stock	2,320,981	2,580,491	2,156,250
Unvested restricted common stock	2,084	174,988	1,196,792
Total	2,323,065	2,755,479	3,353,042