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Business Segments, Concentration of Credit Risk and Significant Customers
3 Months Ended
Mar. 31, 2019
Segment Reporting [Abstract]  
Business Segments, Concentration of Credit Risk and Significant Customers

Note 5. Business Segments, Concentration of Credit Risk and Significant Customers

The Company operates in one business segment and uses one measurement of profitability for its business. Net revenue is attributed to the United States and to all foreign countries based on the geographical location of the customer.

The Company recognized revenue from shipment of product and licensing of its technologies to customers by geographical location as follows (in thousands):

 

     Three Months Ended
March 31,
 
     2019      2018  

North America

   $ 2,487      $ 3,357  

Japan

     906        714  

Taiwan

     74        83  

Rest of world

     53        54  
  

 

 

    

 

 

 

Total net revenue

   $ 3,520      $ 4,208  
  

 

 

    

 

 

 

Customers who accounted for at least 10% of total net revenue were:

 

     Three Months Ended
March 31,
 
     2019     2018  

Customer A

     26     17

Customer B

     23     34

Customer C

     15     24

Customer D

     14     *

Customer E

     13     10

 

*

Represents less than 10%

Three customers accounted for 94% of accounts receivable at March 31, 2019. Three customers accounted for 63% of accounts receivable at December 31, 2018.