Net loss per share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule Of Antidilutive Securities Excluded from Computation Of Earnings Per 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:

	September 30, 2018	September 30, 2017
Options to purchase common stock	2,580,639	2,701,922
Unvested restricted common stock	2,709	430,439
Total	2,583,348	3,132,361