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Concentration of Credit Risk

9 Months Ended

Sep. 30, 2020

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 nine months ended September 30, 2020 and 2019, and customers that accounted for 10% or more of total trade accounts receivable at September 30, 2020 and 2019.

	Three months ended September 30,				Nine months ended September 30,
	2020		2019		2020		2019
Percentage of net revenue
Customer A	32%		34%		33%		38%
Customer B		15		18		10		14
Customer C		10		6		7		6
Customer D		4		10		1		3

	As of September 30,
	2020		2019
Percentage of gross trade accounts receivable
Customer A	17%		13%
Customer B		15		38
Customer C		13		15
Customer D		13		5

(b)	Concentration of Purchases

During the three and nine months ended September 30, 2020, the Company’s products were primarily manufactured by two vendors in China and by the Company’s Arizona facility.