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Equity Incentive Plans (Tables)
6 Months Ended
Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of Operational Milestone Based on Revenue or Adjusted EBITDA

Total Annualized Revenue
(in billions)

Annualized Adjusted EBITDA

(in billions)

$20.0

$1.5

$35.0

$3.0

$55.0

$4.5

$75.0

$6.0

$100.0

$8.0

$125.0

$10.0

$150.0

$12.0

$ 175.0

$14.0

Summary of Stock-Based Compensation Expense

The following table summarizes our stock-based compensation expense by line item in the consolidated statements of operations (in thousands):

 

 

 

Three Months Ended June 30,

 

 

Six Months Ended June 30,

 

 

 

2019

 

 

2018

 

 

2019

 

 

2018

 

Cost of revenues

 

$

34,607

 

 

$

21,661

 

 

$

61,817

 

 

$

45,369

 

Research and development

 

 

71,474

 

 

 

65,937

 

 

 

143,956

 

 

 

127,044

 

Selling, general and administrative

 

 

102,948

 

 

 

105,869

 

 

 

209,654

 

 

 

162,693

 

Restructuring and other

 

 

834

 

 

 

3,877

 

 

 

2,814

 

 

 

3,877

 

Total

 

$

209,863

 

 

$

197,344

 

 

$

418,241

 

 

$

338,983