Concentration of Credit Risk

6 Months Ended

Jun. 30, 2019

Note 13. Concentration of Credit Risk

(a)	Concentration of Sales and Accounts Receivable

The following represents customers that accounted for 10% or more of total revenue during the three and six months ended June 30, 2019 and 2018 and customers that accounted for 10% or more of total trade accounts receivable at June 30, 2019 and 2018.

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Percentage of net revenue
Customer A	37%		37%		39%		34%
Customer B		15		7		12		7
Customer C		10		10		6		7

	As of June 30,
	2019		2018
Percentage of gross trade accounts receivable
Customer A	44%		21%
Customer B		15		6
Customer C		8		19

(b)	Revenue by Geography

Net revenue by geographic area are as follows. Revenue is attributed by geographic location based on the bill-to location of the Company’s customers.

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Percentage of net revenue
China	75%		76%		73%		70%
Other Asia		3		4		5		6
North America		20		15		19		18
Europe		2		5		3		6

Although the Company ships the majority of antennas to its customers in China (primarily Original Design Manufacturers and distributors), the end-users of the Company’s products are much more geographically diverse.

(c)	Concentration of Purchases

During the three and six months ended June 30, 2019, primarily all of the Company’s products were manufactured by two vendors in China and by the Company’s facilities in Arizona.