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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2024
Stock-Based Compensation  
Summary of stock-based compensation expenses

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Three months ended March 31, 

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2024

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2023

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(in thousands)

Cost of revenues

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$

3,777

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$

2,556

Research and development

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20,649

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14,640

Selling, general and administrative

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40,021

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23,281

Total

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$

64,447

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$

40,477

Summary of stock option activity

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Weighted-

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Number of

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Average

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Shares

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Exercise

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Outstanding

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Price

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(in thousands, except for per share data)

December 31, 2023

5,501

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$

23.65

Options exercised

(792)

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$

8.17

March 31, 2024

4,709

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$

26.25

Restricted stock units

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Weighted-

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Average

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Grant Date

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Shares

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Fair Value

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(in thousands, except for per share data)

Balance at December 31, 2023

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9,248

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$

49.50

Granted

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4,608

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$

67.28

Vested

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(1,861)

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$

52.40

Cancelled/forfeited

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(94)

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$

57.77

Balance at March 31, 2024

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11,901

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$

56.16