NET LOSS PER SHARE

Basic earnings per share is computed using the weighted-average number of outstanding shares of common stock during the period. Diluted earnings per share is computed using the weighted-average number of outstanding shares of common stock and, when dilutive, potential shares of common stock outstanding during the period. Potential common shares consist of the incremental shares of common stock issuable upon the exercise of stock options, shares issuable upon the vesting of RSUs and, to a lesser extent, purchase rights related to the ESPP.

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,
	2018			2017
Net loss attributable to common stockholders	$	(2,286	)	$	(4,026	)
Basic Shares:
Weighted-average shares outstanding	83,785			79,843
Diluted Shares:
Weighted-average shares outstanding to compute diluted net loss per share	83,785			79,843
Net loss per share attributable to common stockholders
Basic	$	(0.03	)	$	(0.05	)
Diluted	$	(0.03	)	$	(0.05	)

The following weighted-average stock-based instruments were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented (in thousands):



	Three Months Ended March 31,
	2018	2017
Stock options	7,392	8,598
Restricted stock units	7,454	7,556
Employee stock purchase plan	86	85