Concentrations of risk and geographic information

Customer concentration. Financial instruments, which potentially subject the Company to concentrations of credit risk, consist principally of trade receivables. The Company believes that credit risk for accounts receivable is mitigated by the Company’s credit evaluation process, relatively short collection terms and dispersion of its customer base. The Company generally does not require collateral and losses on trade receivables have historically been within management’s expectations.

Customers who represented 10% or more of the Company’s net accounts receivable balance were as follows:



	June 30, 2018	December 31, 2017
Customer A	18%	16%
Customer B	20%	32%
Customer C	*	12%
Customer D	*	11%

The following table summarizes the Company’s accounts receivables sold, without recourse, and factoring fees paid:



	Three months ended June 30,				Six months ended June 30,
(in thousands)	2018		2017		2018		2017
Accounts receivable sold	$	33,858	$	41,574	$	52,454	$	78,962
Factoring fees	434		368		655		680

Customers who represented 10% or more of the Company’s total revenue were as follows:



	Three months ended June 30,		Six months ended June 30,
	2018	2017	2018	2017
Customer A	16%	17%	15%	16%
Customer B	*	12%	11%	*

* Less than 10% of total revenue for the period indicated

Supplier concentration. The Company relies on third parties for the supply and manufacture of its products, some of which are sole-source suppliers. The Company believes that outsourcing manufacturing enables greater scale and flexibility. As demand and product lines change, the Company periodically evaluates the need and advisability of adding manufacturers to support its operations. In instances where a supply and manufacture agreement does not exist or suppliers fail to perform their obligations, the Company may be unable to find alternative suppliers or satisfactorily deliver its products to its customers on time, if at all. The Company also relies on third parties with whom it outsources supply chain activities related to inventory warehousing, order fulfillment, distribution and other direct sales logistics.

Geographic information

Revenue by geographic region, based on ship-to destinations, was as follows:



	Three months ended June 30,				Six months ended June 30,
(in thousands)	2018		2017		2018		2017
Americas	$	131,580	$	157,027	$	222,052	$	252,734
Europe, Middle East and Africa (EMEA)	90,841		80,214		153,151		148,077
Asia and Pacific (APAC)	60,256		59,285		109,820		114,329
Total revenue	$	282,677	$	296,526	$	485,023	$	515,140

Revenue in the United States, which is included in the Americas geographic region, was $113.6 million and $140.6 million for the three months ended June 30, 2018 and 2017, respectively, and $192.5 million and $227.4 million for the six months ended June 30, 2018 and 2017, respectively. No other individual country exceeded 10% of total revenue for any period presented. The Company does not disclose revenue by product category as it does not track sales incentives and other revenue adjustments by product category to report such data.

As of June 30, 2018 and December 31, 2017, long-lived assets, which represent gross property and equipment, located outside the United States, primarily in Hong Kong and China, were $80.5 million and $79.7 million, respectively.