Note 12. Net Loss per Share Attributable to Common Stockholders

We calculate our basic and diluted net loss per share attributable to common stockholders in conformity with the two-class method required for companies with participating securities. We consider all series of our redeemable convertible preferred stock to be participating securities. In the event a dividend is declared or paid on our common stock, holders of redeemable convertible preferred stock are entitled to a proportionate share of such dividend in proportion to the holders of common stock on an as-if converted basis. Under the two-class method, basic net loss per share attributable to common stockholders is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding for the period, less shares subject to repurchase. Net loss attributable to common stockholders is determined by allocating undistributed earnings between common and redeemable convertible preferred stockholders. 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, redeemable convertible preferred stock, options to purchase common stock, warrants to purchase redeemable convertible preferred stock, repurchasable shares from early exercised options and unvested restricted stock 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. Under the two-class method, the net loss attributable to common stockholders is not allocated to the convertible redeemable preferred stock as the holders of our convertible redeemable preferred stock do not have a contractual obligation to share in our losses.

The rights, including the liquidation and dividend rights, of the holders of our Class A and Class B common stock are identical, except with respect to voting. As the liquidation and dividend rights are identical, the undistributed earnings are allocated on a proportionate basis and the resulting net loss per share attributed to common stockholders will, therefore, be the same for both Class A and Class B common stock on an individual or combined basis. We did not present dilutive net loss per share on an if-converted basis because the impact was not dilutive.

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

	Year Ended January 31,
	2016						2015							2014
	Class A			Class B			Class A				Class B			Class A		Class B
Numerator:
Net loss	$	(49,448	)	$	(153,500	)	$	(1,677	)		$	(166,550	)	$	—	$	(168,557	)
Add: accretion of redeemable convertible preferred stock		—			—			(115	)			(11,388	)		—		(341	)
Add: deemed dividend on the conversion of Series F redeemable convertible preferred stock		—			—			(23	)			(2,239	)		—		—
Net loss attributable to common stockholders	$	(49,448	)	$	(153,500	)	$	(1,815	)		$	(180,177	)	$	—	$	(168,898	)
Denominator:
Weighted-average number of shares outstanding—basic and diluted		29,540			91,700			158				15,696			—		11,341
Net loss per share attributable to common stockholders—basic and diluted	$	(1.67	)	$	(1.67	)	$	(11.48	)	*	$	(11.48	)	$	—	$	(14.89	)

*	Amounts cannot be recalculated due to rounding

The following weighted-average outstanding shares of common stock equivalents 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):

	Year Ended January 31,
	2016		2015		2014
Redeemable convertible preferred stock		—		79,519		71,465
Options to purchase common stock		16,654		18,146		17,036
Restricted stock units		7,233		2,994		1
Employee stock purchase plan		3,944		—		—
Warrants to purchase redeemable convertible preferred stock		—		86		736
Repurchasable shares from early-exercised options and unvested restricted stock		551		623		764
Contingently issuable common stock		115		91		—
		28,497		101,459		90,002