7. Net Loss Per Share

Basic net loss per share is calculated by dividing net loss by the weighted average number of common shares outstanding during the period, and excludes any dilutive effects of employee stock-based awards and warrants. Diluted net income per share is computed giving effect to all potentially dilutive common shares, including common stock issuable upon exercise of stock options and warrants and vesting of restricted stock. As the Company had net losses for the three months ended March 31, 2016 and 2015, all potentially issuable common shares were determined to be anti-dilutive.

The following table presents the calculation of basic and diluted net loss per share (in thousands, except per share data).



	Three Months Ended
	March 31, 2016			March 31, 2015
Net loss	$	(4,911	)	$	(8,903	)
Weighted-average shares used in computing basic and diluted net loss per share	51,377			49,433
Basic and diluted net loss per share	$	(0.10	)	$	(0.18	)

The following securities were excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would have been anti-dilutive for the periods presented (in thousands).



	March 31, 2016	March 31, 2015
Stock options	5,980	6,891
Restricted stock units	2,459	1,458
ESPP	162	171
Common stock warrants	132	360
Common stock subject to repurchase or forfeiture	—	21
Total	8,733	8,901