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SIGNIFICANT CUSTOMER INFORMATION (Tables)
6 Months Ended
Jun. 30, 2020
SIGNIFICANT CUSTOMER INFORMATION  
Schedule of revenue by major customers by reporting segments

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Three Months Ended June 30, 

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2020

​

2019

Applied Materials, Inc.

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$

64,408

    

19.0

%

  

$

33,731

        

25.0

%

LAM Research

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*

 

*

%

​

 

19,802

 

14.7

%

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Six Months Ended June 30, 

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2020

​

2019

Applied Materials, Inc.

​

$

115,389

    

17.6

%

  

$

70,021

    

25.4

%

LAM Research

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*

 

*

%

​

 

39,373

 

14.3

%

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June 30,

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December 31,

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2020

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2019

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Applied Materials, Inc.

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$

42,541

    

18.1

%

  

$

36,849

    

14.9

%

Nidec Motor Corporation

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*

 

*

%

  

​

38,071

​

15.4

%