Net Loss Per Share

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Net Loss Per Share

3. Net Loss Per Share

Basic net loss per share is calculated by dividing net loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period, less common stock issued that is subject to repurchase, without consideration for common stock equivalents. Diluted net loss per share is computed by dividing net loss by the weighted-average number of common share equivalents outstanding for the period determined using the treasury-stock method. For purposes of this calculation, convertible and redeemable convertible preferred stock and warrants for preferred stock, stock options and common stock subject to repurchase are considered to be common stock equivalents and are only included in the calculation of diluted net loss per share when their effect is dilutive.

The following outstanding shares of common stock equivalents were excluded from the calculation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been antidilutive:

	As of September 30,
	2015		2014
Options to purchase common stock		3,314,159		2,386,507
Common stock subject to repurchase		39,493		—
Convertible preferred stock		—		252,818
Redeemable convertible preferred stock		—		17,236,784
Warrants for preferred stock		—		984,529
Total potential dilutive shares		3,353,652		20,860,638

The Company computes diluted loss per common share after giving consideration to the dilutive effect of stock options, warrants and non-vested stock that are outstanding during the period, except where such non-participating securities would be anti-dilutive. To date, the Company has only incurred net losses and has not allocated any loss to participating securities.