Convertible Preferred Stock, Stockholders (Deficit) Equity and Equity Incentive Plan (Tables)

3 Months Ended

Apr. 30, 2019

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:

	Options Outstanding
						Weighted-
				Weighted-		Average
	Outstanding			Average		Remaining		Aggregate
	Stock			Exercise		Contractual		Intrinsic
	Options			Price		Life (Years)		Value
	(in thousands, except share, life, and per share data)
Balance as of January 31, 2019		35,064,465		$	1.48		6.8	$	534,572
Granted		1,324,650			27.42
Exercised		(13,622,754	)		0.14
Cancelled/forfeited/expired		(142,301	)		4.60
Balance as of April 30, 2019		22,624,060		$	3.78		8.2	$	1,554,000
Vested as of April 30, 2019		7,516,678		$	0.76		7.1	$	539,010

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 April 30,
	2019		2018
	(in thousands)
Cost of revenue	$	830	$	95
Research and development		1,164		129
Sales and marketing		2,627		396
General and administrative		2,041		229
Total stock-based compensation expense	$	6,662	$	849