Note 12. Net Loss Per Share Attributable to Common Stockholders

The Company calculates basic net loss per share attributable to common stockholders by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period.

The diluted net loss per share attributable to common stockholders is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. For purposes of this calculation, options to purchase common stock, common stock related to unvested restricted stock units, warrants to purchase common stock, convertible senior notes to the extent dilutive, and common stock issuable pursuant to the employee stock purchase plan are considered common stock equivalents but have been excluded from the calculation of diluted net loss per share attributable to common stockholders as their effect is antidilutive. Basic and diluted net loss per share was the same for each period presented, as the inclusion of all potential common shares outstanding would have been antidilutive.

The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share data):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
				*As Adjusted						*As Adjusted
Numerator:
Net loss attributable to common stockholders	$	(5,297	)	$	(6,912	)	$	(13,396	)	$	(14,051	)
Denominator:
Weighted-average common shares outstanding - basic and diluted		43,921			39,175			43,345			38,793
Net loss per common share - basic and diluted	$	(0.12	)	$	(0.18	)	$	(0.31	)	$	(0.36	)
*See Note 1 for a summary of adjustments

The following weighted-average outstanding shares of potentially dilutive securities were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because the impact of including them would have been antidilutive (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
			*As Adjusted				*As Adjusted
Stock options to purchase common stock		5,993		10,145		6,463		10,587
Unvested restricted stock units (RSUs)		2,389		1,286		2,228		966
Common stock issuable under 2016 ESPP		122		212		127		231
Warrants to purchase common stock		—		11		4		11
Convertible senior notes		3,515		—		1,942		—
		12,019		11,654		10,764		11,795
*See Note 1 for a summary of adjustments