Net Loss per Share

3 Months Ended

Mar. 31, 2017

Disclosure Text Block

Net Loss per Share

9. Net Loss per Share

Basic net loss per share applicable to common stockholders is calculated by dividing net loss applicable to common stockholders by the weighted average shares outstanding during the period, without consideration for common stock equivalents. Diluted net loss per share applicable to common stockholders is calculated by adjusting weighted average shares outstanding for the dilutive effect of common stock equivalents outstanding for the period. For purposes of the dilutive net loss per share applicable to common stockholders calculation, stock options, and unvested restricted stock are considered to be common stock equivalents but are excluded from the calculation of diluted net loss per share applicable to common stockholders, as their effect would be anti‑dilutive; therefore, basic and diluted net loss per share applicable to common stockholders were the same for all periods presented as a result of the Company’s net loss. The following common stock equivalents were excluded from the calculation of diluted net loss per share applicable to common stockholders for the periods indicated because including them would have had an anti‑dilutive effect.

	Three Months Ended
	March 31,
	2017	2016
Stock options	3,237,043	2,395,469
Unvested restricted stock	254	90,130
Total	3,237,297	2,485,599

The weighted average number of common shares used in net loss per share applicable to common stockholders on a basic and diluted basis were 33,189,759 and 27,087,919 for the three months ended March 31, 2017 and 2016, respectively.