Concentration of Credit Risk

3 Months Ended

Mar. 31, 2018

Note 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 three months ended March 31, 2018 and 2017 and customers that accounted for 10% or more of total trade accounts receivable at March 31, 2018 and 2017.

	Three Months Ended March 31,
	2018			2017
Percentage of net revenue
Customer A		30	%		22	%
Customer B		8			14
Customer C		4			13

	As of March 31,
	2018			2017
Percentage of gross trade accounts receivable
Customer A		22	%		14	%
Customer B		11			14
Customer C		6			16
Customer D		6			11

(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 March 31,
	2018			2017
Percentage of net revenue
China		64	%		71	%
Other Asia		8			13
North America		22			10
Europe		6			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 months ended March 31, 2018, all the Company’s products were manufactured by two vendors in China and by the Company’s facilities in Arizona. During the three months ended March 31, 2017, all the Company’s products were manufactured by two vendors in China.