XML 26 R15.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock-Based Compensation
6 Months Ended
Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Stock-Based Compensation

Note 9. Stock-Based Compensation

The following table summarizes stock-based compensation expense by financial statement line item in the Company’s consolidated statements of operations for the three and six months ended September 30, 2018 and 2017:

 

 

 

For the Three Months Ended September 30,

 

 

For the Six Months Ended September 30,

 

 

 

 

2018

 

 

 

2017

 

 

 

2018

 

 

 

2017

 

 

 

(in $000's)

 

 

(in $000's)

 

Cost of product revenue

 

$

774

 

 

$

372

 

 

$

1,349

 

 

$

731

 

Research and development

 

 

2,618

 

 

 

1,205

 

 

 

4,584

 

 

 

2,544

 

Selling, general and administrative

 

 

12,542

 

 

 

7,705

 

 

 

22,246

 

 

 

14,663

 

 

 

$

15,934

 

 

$

9,282

 

 

$

28,179

 

 

$

17,938

 

 

Stock Options

The following table summarizes the stock option activity for the six months ended September 30, 2018:

 

 

 

 

 

 

 

 

 

 

 

Weighted

 

 

 

 

 

 

 

 

 

 

 

Weighted

 

 

Average

 

 

Aggregate

 

 

 

 

 

 

 

Average

 

 

Remaining

 

 

Intrinsic

 

 

 

Options

 

 

Exercise

 

 

Contractual

 

 

Value

 

 

 

(in thousands)

 

 

Price

 

 

Term (years)

 

 

(in thousands)

 

Outstanding at beginning of period

 

 

1,282

 

 

$

46.18

 

 

 

5.31

 

 

 

 

 

Granted

 

 

76

 

 

 

383.96

 

 

 

 

 

 

 

 

 

Exercised

 

 

(425

)

 

 

24.95

 

 

 

 

 

 

 

 

 

Cancelled and expired

 

 

(15

)

 

 

153.17

 

 

 

 

 

 

 

 

 

Outstanding at end of period

 

 

918

 

 

$

83.05

 

 

 

5.97

 

 

$

331,490

 

Exercisable at end of period

 

 

669

 

 

$

38.86

 

 

 

4.97

 

 

$

271,255

 

Options vested and expected to vest at end of period

 

 

905

 

 

$

82.85

 

 

 

5.94

 

 

$

327,147

 

Stock options generally vest and become exercisable annually over three years. The remaining unrecognized stock-based compensation expense for unvested stock option awards at September 30, 2018 was approximately $15.8 million and the estimated weighted-average period over which this cost will be recognized is 2.3 years.

The aggregate intrinsic value of options exercised was $155.4 million for the six months ended September 30, 2018. The total cash received as a result of employee stock options exercised during the six months ended September 30, 2018 was approximately $10.6 million.

The Company estimates the fair value of each stock option granted at the grant date using the Black-Scholes option valuation model. The weighted average grant-date fair values and weighted average assumptions used in the calculation of fair value of options granted during the three and six months ended September 30, 2018 and 2017 was as follows:

 

 

 

For the Three Months Ended September 30,

 

 

For the Six Months Ended September 30,

 

 

 

 

2018

 

 

 

2017

 

 

 

2018

 

 

 

2017

 

Weighted average grant-date fair value

 

$

148.51

 

 

$

57.38

 

 

$

142.81

 

 

$

50.26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Valuation assumptions:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Risk-free interest rate

 

 

2.87

%

 

 

1.88

%

 

 

2.93

%

 

 

1.85

%

Expected option life (years)

 

 

3.99

 

 

 

4.06

 

 

 

4.04

 

 

 

4.07

 

Expected volatility

 

 

43.9

%

 

 

43.4

%

 

 

42.7

%

 

 

43.6

%

Restricted Stock Units

 

The following table summarizes activity of restricted stock units for the six months ended September 30, 2018:

 

 

 

Number of

Shares

 

 

Weighted

Average

Grant Date

Fair Value

 

 

 

(in thousands)

 

 

(per share)

 

Restricted stock units at beginning of period

 

 

880

 

 

$

109.01

 

Granted

 

 

192

 

 

$

379.63

 

Vested

 

 

(404

)

 

$

103.91

 

Forfeited

 

 

(20

)

 

$

187.41

 

Restricted stock units at end of period

 

 

649

 

 

$

189.87

 

 

Restricted stock units generally vest annually over three years. The remaining unrecognized compensation expense for outstanding restricted stock units, including performance and market-based awards, as of September 30, 2018 was $72.1 million and the estimated weighted-average period over which this cost will be recognized is 2.3 years.

The weighted average grant-date fair value for restricted stock units granted during the six months ended September 30, 2018 was $379.63. The total fair value of restricted stock units vested during the six months ended September 30, 2018 was $163.3 million.

Performance-Based Awards

In May 2018, performance-based awards of restricted stock units for the potential issuance of approximately 114,000 shares of common stock were issued to certain executive officers and employees, which vest upon achievement of prescribed service milestones by the award recipients and performance milestones by the Company. As of September 30, 2018, the Company is recognizing compensation expense based on the probable outcome related to the prescribed performance targets on the outstanding awards.