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Stock-Based Compensation (Tables)
3 Months Ended
Apr. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of Stock Option Activity Under Equity Incentive Plans and Related Information

The following table summarizes the stock option activity under the equity incentive plans and related information:

 

 

 

Shares Subject to Options Outstanding

 

 

Weighted-

Average

 

 

 

 

 

 

 

 

 

 

 

Weighted-

 

 

Remaining

 

 

 

 

 

 

 

 

 

 

 

Average Exercise

 

 

Contractual Life

 

 

Aggregate

 

 

 

Shares

 

 

Price

 

 

(Years)

 

 

Intrinsic Value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(in thousands)

 

Balance as of January 31, 2020

 

 

8,772,585

 

 

$

9.48

 

 

 

4.27

 

 

$

60,221

 

Options granted

 

 

31,666

 

 

 

12.48

 

 

 

 

 

 

 

 

 

Options exercised

 

 

(222,426

)

 

 

4.34

 

 

 

 

 

 

 

 

 

Options forfeited/cancelled

 

 

(24,250

)

 

 

17.85

 

 

 

 

 

 

 

 

 

Balance as of April 30, 2020

 

 

8,557,575

 

 

$

9.60

 

 

 

4.08

 

 

$

64,061

 

Vested and expected to vest as of April 30, 2020

 

 

8,484,725

 

 

$

9.52

 

 

 

4.05

 

 

$

64,056

 

Exercisable as of April 30, 2020

 

 

7,036,704

 

 

$

7.44

 

 

 

3.19

 

 

$

63,949

 

 

Summary of Restricted Stock Unit Activity Under Equity Incentive Plans and Related Information

The following table summarizes the restricted stock unit activity under the equity incentive plans and related information:

 

 

 

Number of

 

 

Weighted-

 

 

 

Restricted

 

 

Average

 

 

 

Stock Units

 

 

Grant Date

 

 

 

Outstanding

 

 

Fair Value

 

Unvested balance - January 31, 2020

 

 

21,808,107

 

 

$

18.85

 

Granted

 

 

7,313,474

 

 

 

14.53

 

Vested, net of shares withheld for employee payroll taxes

 

 

(1,330,535

)

 

 

18.66

 

Forfeited/cancelled

 

 

(884,977

)

 

 

19.78

 

Unvested balance - April 30, 2020

 

 

26,906,069

 

 

$

17.65

 

 

Summary of Components of Stock-Based Compensation Expense

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

 

 

 

Three Months Ended

 

 

 

April 30,

 

 

 

2020

 

 

2019

 

Cost of revenue

 

$

4,541

 

 

$

3,611

 

Research and development

 

 

17,287

 

 

 

12,975

 

Sales and marketing

 

 

10,079

 

 

 

9,400

 

General and administrative

 

 

8,136

 

 

 

6,376

 

Total stock-based compensation

 

$

40,043

 

 

$

32,362

 

 

Schedule Of Share Based Payment Award Employee Stock Options And Employee Stock Purchase Plan Valuation Assumptions [Table Text Block]

We estimated the fair value of employee stock options and 2015 ESPP purchase rights using a Black-Scholes option pricing model with the following assumptions.

 

 

 

Three Months Ended

 

 

 

April 30,

 

 

 

2020

 

 

2019

 

Employee Stock Options

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Expected term (in years)

 

 

 

 

 

 

5.8

 

 

 

 

 

 

N/A

 

Risk-free interest rate

 

 

 

 

 

 

0.6

%

 

 

 

 

 

N/A

 

Volatility

 

 

 

 

 

 

46

%

 

 

 

 

 

N/A

 

Dividend yield

 

 

 

 

 

 

0

%

 

 

 

 

 

N/A

 

Employee Stock Purchase Plan

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Expected term (in years)

 

 

0.5

 

-

 

2.0

 

 

 

0.5

 

-

 

2.0

 

Risk-free interest rate

 

 

0.3

%

-

 

0.4

%

 

 

2.4

%

-

 

2.5

%

Volatility

 

 

44

%

-

 

52

%

 

 

46

%

-

 

55

%

Dividend yield

 

 

 

 

 

 

0

%

 

 

 

 

 

 

0

%