Business Segments, Concentration of Credit Risk and Significant Customers

9 Months Ended

Sep. 30, 2020

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				Nine Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
North America	$	1,494	$	930	$	4,112	$	6,004
Japan		343		179		593		1,431
Taiwan		93		97		340		225
Rest of world		41		—		154		132
Total net revenue	$	1,971	$	1,206	$	5,199	$	7,792

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

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2020	2019	2020	2019
Customer A	33%	*%	32%	*%
Customer B	24%	15%	26%	13%
Customer C	17%	15%	11%	*%
Customer D	11%	33%	*%	27%

* Represents less than 10%

Four customers accounted for 79% of accounts receivable as of September 30, 2020. Four customers accounted for 85% of accounts receivable as of December 31, 2019.