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Note 10 - Customer and Geographic Information (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]
  

Three Months Ended June 30,

  

Six Months Ended June 30,

 

Customer

 

2020

  

2019

  

2020

  

2019

 

A

  24%  33%  25%  34%

D

  13%  *%  *%  *%
  

June 30,

  

December 31,

 

Customer

 

2020

  

2019

 

A

  19%  27%

B

  *%  14%

C

  15%  12%
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
  

Three Months Ended June 30,

 
  

2020

  

2019

 
      

Percentage

      

Percentage

 
  

Revenues

  

of Revenues

  

Revenues

  

of Revenues

 

United States

 $9,915   46% $8,547   42%

Taiwan

  3,990   19   2,341   11 

China

  495   2   3,267   16 

Rest of the world

  7,009   33   6,413   31 

Total revenue

 $21,409   100% $20,568   100%
  

Six Months Ended June 30,

 
  

2020

  

2019

 
      

Percentage

      

Percentage

 
  

Revenues

  

of Revenues

  

Revenues

  

of Revenues

 

United States

 $18,532   43% $17,862   44%

Taiwan

  6,658   16   4,096   10 

China

  3,454   8   6,250   15 

Rest of the world

  13,923   33   12,901   31 

Total revenue

 $42,567   100% $41,109   100%
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]
  

June 30,

  

December 31,

 
  

2020

  

2019

 

United States

 $45,285  $46,000 

Rest of the world

  2,183   2,407 

Total long-lived assets, net

 $47,468  $48,407