XML 42 R32.htm IDEA: XBRL DOCUMENT v3.7.0.1
Stock-based Compensation (Tables)
 3 Months Ended
Apr. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Classification of Stock-based Compensation

The following table presents the classification of stock-based compensation for the periods indicated:

 

 

 

Three Months Ended April 30,

 

 

 

2017

 

 

2016

 

 

 

(in thousands)

 

Stock-based compensation:

 

 

 

 

 

 

 

 

Cost of revenue

 

$

303

 

 

$

245

 

Research and development

 

 

7,977

 

 

 

6,719

 

Selling, general and administrative

 

 

4,692

 

 

 

4,337

 

Total stock-based compensation

 

$

12,972

 

 

$

11,301

 

 
Weighted-Average Assumptions Used to Estimate Fair Value

The following table sets forth the weighted-average assumptions used to estimate the fair value of stock options and employee stock purchase plan awards for the periods indicated:

 

 

Three Months Ended April 30,

 

 

2017

 

 

2016

 

Stock Options:

 

 

 

 

 

 

 

Volatility

 

53

%

 

 

38

%

Risk-free interest rate

 

2.17

%

 

 

1.57

%

Expected term (years)

6.07

 

 

 

5.95

 

Dividend yield

 

0

%

 

 

0

%

Employee stock purchase plan awards:

 

 

 

 

 

 

 

Volatility

 

39

%

 

 

67

%

Risk-free interest rate

 

0.89

%

 

 

0.52

%

Expected term (years)

 

0.5

 

 

 

0.5

 

Dividend yield

 

0

%

 

 

0

%

 
Stock Option Activity

The following table summarizes stock option activity for the three months ended April 30, 2017:

 

 

Option Outstanding

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total Intrinsic

 

 

Average

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted-

 

 

Value Of

 

 

Remaining

 

 

Aggregate

 

 

 

 

 

 

 

Weighted-

 

 

Average

 

 

Options

 

 

Contractual

 

 

Intrinsic

 

 

 

 

 

 

 

Average

 

 

Grant-date

 

 

Exercised

 

 

Term

 

 

Value

 

 

 

Shares

 

 

Exercise Price

 

 

Fair Value

 

 

(in thousands)

 

 

(in years)

 

 

(in thousands)

 

Outstanding at January 31, 2017

 

 

1,703,524

 

 

$

21.66

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Granted

 

 

50,600

 

 

 

56.27

 

 

$

29.23

 

 

 

 

 

 

 

 

 

 

 

 

 

Exercised

 

 

(47,480

)

 

 

12.23

 

 

 

 

 

 

$

2,080

 

 

 

 

 

 

 

 

 

Forfeited

 

 

(6,063

)

 

 

61.45

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Expired

 

 

(2,945

)

 

 

64.60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outstanding at April 30, 2017

 

 

1,697,636

 

 

 

22.74

 

 

 

 

 

 

 

 

 

 

5.04

 

 

$

59,542

 

Exercisable at April 30, 2017

 

 

1,363,740

 

 

$

15.85

 

 

 

 

 

 

 

 

 

 

 

4.24

 

 

$

56,306

 

 
Restricted Stock and Restricted Stock Units Activities

The following table summarizes restricted stock and restricted stock units activities for the period indicated:

 

 

 

 

 

 

 

Weighted-

 

 

 

 

 

 

 

Average

 

 

 

 

 

 

 

Grant-Date

 

 

 

Shares

 

 

Fair Value

 

Unvested at January 31, 2017

 

 

2,175,673

 

 

$

56.76

 

Granted

 

 

323,851

 

 

 

57.10

 

Vested

 

 

(248,862

)

 

 

45.15

 

Forfeited

 

 

(31,679

)

 

 

56.26

 

Unvested at April 30, 2017

 

 

2,218,983

 

 

$

58.12