Employee Incentive Plans (Tables)

3 Months Ended

Apr. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Stock-based Compensation Expense by Statement of Operations Location

Stock-based compensation expense was recorded in the following cost and expense categories in the Company’s condensed consolidated statements of operations (in thousands):

	Three Months Ended April 30,
	2018		2017
	(unaudited)
Cost of revenue
Subscription	$	1,529	$	686
Professional services and other	889		469
Research and development	4,213		3,301
Sales and marketing	4,153		2,375
General and administrative	3,351		2,075
Total	$	14,135	$	8,906

Schedule of Shares of Common Stock Reserved for Future Issuance

Shares of common stock reserved for future issuance are as follows:

	As of
	April 30, 2018
	(unaudited)
Stock options and unvested RSUs outstanding	26,108,047
Available for future stock option and RSU grants	14,193,351
Available for ESPP	3,470,337
	43,771,735

Schedule of Stock Option Activity

A summary of the Company’s stock option activity and related information is as follows:

	Number of Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of January 31, 2018	24,917,045		$	7.37	7.6	$	550,173
Granted	684,500		39.21
Exercised	(2,461,383	)	4.95
Canceled	(464,669	)	8.24
Outstanding as of April 30, 2018 (unaudited)	22,675,493		$	8.58	7.7	$	776,287
As of April 30, 2018
Vested and exercisable (unaudited)	9,285,314		$	5.81	6.9	$	343,540

Schedule of Black-Scholes Option Pricing Model Estimated Fair Value Assumptions

The Company used the Black-Scholes option pricing model to estimate the fair value of stock options granted with the following assumptions:

	Three Months Ended April 30,
	2018	2017
	(unaudited)
Expected volatility	40%	40% - 41%
Expected term (in years)	6.25	6.0 - 6.4
Risk-free interest rate	2.70%	2.06% - 2.21%
Expected dividend yield	—	—

Schedule of Nonvested Restricted Stock Units Activity

A summary of the Company’s RSU activity and related information is as follows:

	Number of RSUs		Weighted- Average Grant Date Fair Value Per Share
Outstanding as of January 31, 2018	2,862,929		$	24.38
Granted	717,630		39.97
Vested	(58,825	)	17.00
Forfeited	(89,180	)	24.74
Outstanding as of April 30, 2018 (unaudited)	3,432,554		$	27.75