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Share-based Compensation (Tables)
3 Months Ended
Mar. 31, 2023
Share-based Compensation  
Schedule of share-based compensation expense

Three months ended March 31,

    

2023

    

2022

    

    

(in thousands)

Cost of sales

 

$

1,451

 

$

938

 

 

Research and development

2,089

1,257

Selling, general, and administrative

3,487

2,286

Total

$

7,027

$

4,481

Summary of stock option activity

Weighted 

Number of

Average

    

Shares

    

Exercise Price

(in thousands)

Balance - December 31, 2022

177

$

30.94

Expired

(1)

30.47

Balance - March 31, 2023

176

30.94

Summary of non-vested restricted and performance shares activity

    

    

Weighted

Average

Number of

Grant Date

Shares

Fair Value

(in thousands)

Balance - December 31, 2022

2,496

$

23.83

Granted

1,022

22.90

Performance award adjustments

183

10.59

Vested

(1,012)

16.22

Forfeited

(14)

22.46

Balance - March 31, 2023

2,675

25.46