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Note G - Significant Customers (Tables)
9 Months Ended
Sep. 30, 2020
Customer Concentration Risk [Member]  
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
  

Three months ended

September 30,

  

Nine months ended

September 30,

 
  

Unaudited

 

Major customers/ distributors

 

2020

  

2019

  

2020

  

2019

 

VTech Holdings Ltd.

  23%  19%  21%  21%

Nexty Electronics ¹ ²

  11%  11%  10%  9%

Ascend Technology Inc. ¹ ³

  17%  24%  31%  25%