11. Net Loss per Share

Basic and diluted 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, excluding shares subject to repurchase, and without consideration of potentially dilutive securities. The Company's potential dilutive shares, which include outstanding common stock options, unvested common shares subject to repurchase, convertible preferred stock and warrants have not been included in the computation of diluted net loss per share for all periods as the result would be anti-dilutive. Such potentially dilutive shares are excluded when the effect would be to reduce the net loss per share.

The following table provides the basic and diluted net loss per share computations for the three months ended March 31, 2016 and 2015.


	Three months ended
	March 31,
(in thousands, except per share data)	2016		2015

Basic and diluted loss per share:
Net loss	$	(8,685)	$	(10,004)

Weighted-average common shares outstanding		50,803		6,916
Less: weighted-average unvested common shares subject to repurchase		(364)		(1,627)
Weighted-average number of shares used in computing net loss per share, basic and diluted		50,439		5,289

Basic and diluted net loss per share	$	(0.17)	$	(1.89)

Potentially dilutive shares that were not included in the diluted per share calculations because they would be anti‑dilutive as of the three months ended March 31, 2016 and 2015 were as follows:


	Three months ended
	March 31,
	2016	2015
	(in thousands)
Options to purchase common stock	8,395	9,358
Warrants to purchase common stock	377	852
Common stock subject to repurchase	—	1,596
Convertible preferred stock	—	31,397
	8,772	43,203