Stockholders’ Equity and Equity Incentive Plans (Tables)

9 Months Ended

Oct. 31, 2020

Stockholders' Equity Note [Abstract]

Summary of Stock Option Activity Under Equity Incentive Plan

A summary of stock option activity under our equity incentive plan and related information is as follows:

	Stock Options
	Outstanding Stock Options	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
	(in thousands, except share, life, and per share data)
Balance as of January 31, 2020	16,833,009	$	5.73	7.6	$	1,191,881
Granted	—	$	—
Exercised	(6,164,676)	$	3.87
Canceled/forfeited/expired	(190,164)	$	6.14
Balance as of October 31, 2020	10,478,169	$	6.81	7.1	$	4,757,980
Vested and exercisable as of October 31, 2020	4,811,474	$	3.49	6.5	$	2,200,842

Summary of Restricted Stock Units (RSUs) Activity Under Equity Incentive Plan

A summary of RSU activity under our equity incentive plan and related information is as follows:

	RSUs
	Unvested RSUs	Weighted- Average Grant Date Fair Value Per Share
Unvested as of January 31, 2020	1,964,668	$	79.11
Granted	3,091,931	$	228.82
Vested	(435,302)	$	86.39
Canceled/forfeited	(155,751)	$	165.09
Unvested as of October 31, 2020	4,465,546	$	179.06

Summary of Stock-based Compensation Expense by Line Item

The stock-based compensation expense by line item in the accompanying condensed consolidated statements of operations is summarized as follows:

	Three Months Ended October 31,				Nine Months Ended October 31,
	2020		2019		2020		2019
	(in thousands)
Cost of revenue	$	11,287	$	2,369	$	22,263	$	5,101
Research and development	16,035		3,642		31,269		7,316
Sales and marketing	46,716		12,488		96,237		25,554
General and administrative	19,887		3,296		29,788		8,561
Total stock-based compensation expense	$	93,925	$	21,795	$	179,557	$	46,532