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Note R - Segment and Geographic Information (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Revenue from External Customers by Geographic Areas [Table Text Block]
  

Year ended December 31,

 
  

2022

  

2021

  

2020

 

Revenues:

            

United States

 $7,423  $14,633  $18,380 

Taiwan

  164,144   99,201   131,076 

China

  51,251   97,731   85,167 
  $222,818  $211,565  $234,623 
Long-Lived Assets by Geographic Areas [Table Text Block]
  

As of December 31,

 
  

2022

  

2021

  

2020

 

Long-lived assets:

            

United States

 $80,048  $87,709  $90,999 

Taiwan

  50,777   63,644   71,080 

China

  93,888   108,509   108,575 
  $224,713  $259,862  $270,654