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Note 8 - Stock-based Compensation (Tables)
3 Months Ended
Apr. 02, 2023
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Three Months Ended

 
  

April 2, 2023

  

April 3, 2022

 

Cost of revenue

 $78  $56 

Research and development

  184   85 

Selling, general and administrative

  453   242 

Total

 $715  $383 
Share-Based Payment Arrangement, Activity [Table Text Block]
 

Shares Available for Grants

 

Balance at January 1, 2023

 960 

Authorized

  

RSUs granted

 (17)

RSUs forfeited or expired

 9 

Balance at April 2, 2023

 952 
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
      

Weighted

  

Weighted

     
      

Average

  

Average

  

Aggregate

 
  

Number of

  

Exercise

  

Remaining

  

Intrinsic

 
  

Shares

  

Price

  

Term

  

Value

 
  

(in thousands)

      

(in years)

  

(in thousands)

 

Balance outstanding at January 1, 2023

  75  $24.50   2.80  $ 

Balance outstanding, exercisable, and vested at April 2, 2023

  75  $24.50   2.55  $ 
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
 

RSUs & PRSUs Outstanding

    

Weighted

    

Average

 

Number of

 

Grant Date

 

Shares

 

Fair Value

 

(in thousands)

   

Nonvested at January 1, 2023

 630 $6.05

Granted

 17  6.06

Vested and released

 (34) 5.79

Forfeited

 (9) 7.25

Nonvested at April 2, 2023

 604 $6.05