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Note 9 - Stock-based Compensation (Tables)
3 Months Ended
Apr. 01, 2023
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Three Months Ended

 
  

April 1,

  

April 2,

 

(In thousands)

 

2023

  

2022

 

Cost of revenue

 $953  $935 

Research and development

  5,339   4,845 

Selling, general, and administrative

  7,963   8,345 

Total stock-based compensation

 $14,255  $14,125 
Share-Based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block]

(Shares in thousands)

 

Total

 

Balance, December 31, 2022

  985 

Granted

  144 

Effect of vesting multiplier

  331 

Vested

  (633)

Balance, April 1, 2023

  827