Stock-Based Compensation (Tables)

6 Months Ended

Jul. 31, 2021

Share-based Payment Arrangement [Abstract]

Share-based Payment Arrangement, Option, Activity

A summary of our stock option plan activity under the 2013 Plan is as follows:

	Number of Options	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of January 31, 2021	37,231,191	$	1.68	8.34	$	442,515
Granted	14,048,623	$	9.66
Exercised	(3,296,747)	$	1.24
Forfeited	(352,965)	$	3.86
Outstanding as of July 31, 2021	47,630,102	$	4.04	8.44	$	2,156,010
Expected to vest as of July 31, 2021	47,630,206	$	4.04	8.44	$	2,156,010
Vested and exercisable as of July 31, 2021	15,494,656	$	1.51	7.28	$	740,631

Nonvested Restricted Stock Shares Activity

A summary of our RSUs is as follows:

	Number of Shares	Weighted-Average Grant Date Fair Value
Outstanding as of January 31, 2021	—	$	—
Granted	346,483	$	32.39
Forfeited	—	—
Outstanding as of July 31, 2021	346,483	$	32.39

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

	Three Months Ended July 31,				Six Months Ended July 31,
	2021		2020		2021		2020
Expected term (in years)	6.0		6.0		6.0		6.0
Expected volatility	62.3	%	48.3	%	62.3% - 66.0%		48.3%- 48.5%
Risk-free interest rate	1.1	%	0.4	%	0.8% - 1.1%		0.4% - 0.5%
Dividend yield	—	%	—	%	—	%	—	%

Schedule of Components of Stock-based Compensation Expense

The components of stock-based compensation expense recognized in the consolidated statements of operations consisted of the following (in thousands):

	Three Months Ended July 31,				Six Months Ended July 31,
	2021		2020		2021		2020
Cost of revenue	$	840	$	65	$	1,223	$	135
Research and development	8,823		261		15,962		3,024
Sales and marketing	3,905		606		5,952		1,067
General and administrative	7,825		656		11,693		1,013
Total	$	21,393	$	1,588	$	34,830	$	5,239