Net Loss per Share Attributable to Common Stockholders (Tables)

12 Months Ended

Jan. 31, 2018

Earnings Per Share [Abstract]

Summary of Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders

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

	Year Ended January 31,
	2016			2017			2018
Net loss	$	(213,752	)	$	(245,066	)	$	(177,602	)
Weighted-average shares used in computing net loss    per share attributable to common stockholders, basic and diluted	82,460			194,714			211,609
Net loss per share attributable to common stockholders, basic and diluted	$	(2.59	)	$	(1.26	)	$	(0.84	)

Summary of Weighted-average Outstanding Shares Excluded from Computation of Diluted Net Loss per Share Attributable to Common Stockholders

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 including them would have been anti-dilutive (in thousands):

	Year Ended January 31,
	2016	2017	2018
Stock options to purchase common stock	61,795	63,984	52,424
Restricted stock units	—	5,216	15,496
Employee stock purchase plan	170	1,310	1,544
Early exercised stock options	3,618	2,106	246
Total	65,583	72,616	69,710