Net Loss per Share

6 Months Ended

Jun. 30, 2018

12. Net Loss per Share

For purposes of the diluted net loss per share calculation, stock options, unvested restricted stock, the warrant to purchase shares of Series A Preferred Stock and Preferred Stock were considered to be common stock equivalents but have been excluded from the calculation of diluted net loss per share, as their effect would be anti-dilutive for all periods presented. Therefore, the weighted-average number of common shares outstanding used to calculate both basic and diluted net loss per share attributable to common stockholders is the same.

The following potentially dilutive common stock equivalents, presented based on amounts outstanding at each period end, were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:


	Six Months Ended June 30,
	2018		2017
Options to purchase common stock		1,871,139		796,311
Restricted common stock		214,789		368,062
Redeemable convertible preferred stock (as converted to common stock)		—		4,155,742
Warrants to purchase redeemable convertible preferred stock (as converted to common stock)		—		6,850
Warrants to purchase common stock		6,850		—