Concentration of Credit Risk

12 Months Ended

Dec. 31, 2018

(14)	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 years ended December 31, 2018, 2017 and 2016 and customers that accounted for 10% or more of total trade accounts receivable at December 31, 2018 and 2017:

	For the Year Ended December 31,
	2018			2017			2016
Percentage of net revenue
Customer A		36	%		21	%		20	%
Customer B		8	%		13	%		31	%
Customer C		7	%		10	%		8	%

	As of December 31,
	2018			2017
Percentage of gross trade accounts receivable
Customer A		32	%		13	%
Customer B		14	%		4	%
Customer C		14	%		9	%
Customer D		8	%		10	%
Customer E (1)		—			19	%

(1) For the year ended December 31, 2018, Customer E was moved under a distributer and is included in the balance for Customer A.

(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.

	For the Year Ended December 31,
	2018			2017			2016
Percentage of net revenue
China		75	%		67	%		74	%
Other Asia		5			10			11
North America		16			18			10
Europe		4			5			5

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

(c)

Concentration of Purchases

During the year ended December 31, 2018, all of the Company’s products were manufactured in our Scottsdale, Arizona facilities and by two vendors in China. During the year ended December 31, 2017 all of the Company’s products were manufactured in our Shullsburg, Wisconsin and Scottsdale, Arizona facilities and by two vendors in China. Manufacturing completed in our Shullsburg, Wisconsin facility was transferred to the Scottsdale, Arizona facility once the facility was closed in July 2017. During the year ended December 31, 2016, all of the Company’s products were manufactured by two vendors in China.