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Major Customers (Tables)
12 Months Ended
Dec. 31, 2020
Major Customers [Abstract]  
Schedule Of Sales To Largest Customers Sales to our largest customers were as follows for the indicated periods:

 

 

Year ended December 31,

 

(in thousands)

 

2020

 

 

2019

 

 

2018

 

Applied Materials, Inc.

 

$

241,522

 

 

$

*

 

 

$

*

 

International Business Machines Corporation

 

$

*

 

 

$

*

 

 

$

323,795

 

 

*

amount is less than 10% of total sales.