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Business Segments, Concentration of Credit Risk and Significant Customers
 6 Months Ended
Jun. 30, 2021
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

 

 

Six Months Ended

 

 

 

June 30,

 

 

June 30,

 

 

 

2021

 

 

2020

 

 

2021

 

 

2020

 

North America

 

$

971

 

 

$

1,807

 

 

$

1,919

 

 

$

2,618

 

Japan

 

 

—

 

 

 

14

 

 

 

274

 

 

 

250

 

Taiwan

 

 

118

 

 

 

108

 

 

 

196

 

 

 

247

 

Rest of world

 

 

79

 

 

 

39

 

 

 

117

 

 

 

113

 

Total net revenue

 

$

1,168

 

 

$

1,968

 

 

$

2,506

 

 

$

3,228

 

 

 

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

 

 

 

Three Months Ended

 

Six Months Ended

 

 

June 30,

 

June 30,

 

 

2021

 

2020

 

2021

 

2020

Customer A

 

40%

 

44%

 

28%

 

32%

Customer B

 

37%

 

29%

 

38%

 

28%

Customer C

 

10%

 

*%

 

*%

 

*%

Customer D

 

*%

 

*%

 

11%

 

*%

 

*

Represents less than 10%

 

Four customers accounted for 95% of accounts receivable as of June 30, 2021. Three customers accounted for 86% of accounts receivable as of December 31, 2020.