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 shares of common stock, including outstanding 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. 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 September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
				*As Adjusted						*As Adjusted
Numerator:
Net loss attributable to common stockholders	$	(4,570	)	$	(4,112	)	$	(17,966	)	$	(18,163	)
Denominator:
Weighted-average common shares outstanding - basic and diluted		44,785			40,120			43,830			39,240
Net loss per common share - basic and diluted	$	(0.10	)	$	(0.10	)	$	(0.41	)	$	(0.46	)
*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 September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Stock options to purchase common stock		5,312		9,224		6,075		10,127
Unvested restricted stock units (RSUs)		2,485		1,829		2,315		1,257
Common stock issuable under 2016 ESPP		106		158		120		207
Warrants to purchase common stock		—		11		3		11
Convertible senior notes		3,659		—		2,573		—
		11,562		11,222		11,086		11,602