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Business Segments, Concentration of Credit Risk and Significant Customers
 9 Months Ended
Sep. 30, 2021
Segment Reporting [Abstract]  
Business Segments, Concentration of Credit Risk and Significant Customers

Note 6. 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

 

 

Nine Months Ended

 

 

 

September 30,

 

 

September 30,

 

 

 

2021

 

 

2020

 

 

2021

 

 

2020

 

North America

 

$

906

 

 

$

1,494

 

 

$

2,825

 

 

$

4,112

 

Japan

 

 

274

 

 

 

343

 

 

 

548

 

 

 

593

 

Taiwan

 

 

103

 

 

 

93

 

 

 

299

 

 

 

340

 

Rest of world

 

 

54

 

 

 

41

 

 

 

171

 

 

 

154

 

Total net revenue

 

$

1,337

 

 

$

1,971

 

 

$

3,843

 

 

$

5,199

 

 

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

 

 

 

Three Months Ended

 

Nine Months Ended

 

 

September 30,

 

September 30,

 

 

2021

 

2020

 

2021

 

2020

Customer A

 

31%

 

24%

 

35%

 

26%

Customer B

 

21%

 

17%

 

14%

 

11%

Customer C

 

20%

 

11%

 

25%

 

*

Customer D

 

14%

 

*

 

*

 

*

 

*

Represents less than 10%

 

Four customers accounted for 88% of accounts receivable as of September 30, 2021. Three customers accounted for 86% of accounts receivable as of December 31, 2020.