The Company is operated and managed geographically and has production facilities in the United States, Mexico and China. The Company utilizes reportable segment’s site contribution (site revenue minus operating expenses, excluding unrealized foreign exchange, corporate allocations and restructuring expenses) to monitor reportable segment performance. Site contribution is utilized by the chief operating decision-maker as the indicator of reportable segment performance, as it reflects costs which our operating site management is directly responsible for. Intersegment adjustments reflect intersegment sales that are generally recorded at prices that approximate arm’s-length transactions. In assessing the performance of the reportable segments, management attributes site revenue to the reportable segment that ships the product to the customer, irrespective of the product’s destination. Information about the reportable segments is as follows:

 

		Three months ended								Six months ended
		June 30 , 201 9				July 1 , 201 8				June 30 , 201 9				July 1 , 201 8
Revenues
Mexico		$	59,336			$	35,581			$	125,096			$	64,654
China			5,793				5,786				14,449				11,019
U.S.			29,211				5,331				59,022				10,586
Total		$	94,340			$	46,698			$	198,567			$	86,259
Intersegment revenue
Mexico		$	(594	)		$	(618	)		$	(743	)		$	(738	)
China			(2,681	)			(1,552	)			(4,107	)			(3,779	)
U.S.			(129	)			(49	)			(132	)			(143	)
Total		$	(3,404	)		$	(2,219	)		$	(4,982	)		$	(4,660	)
Net external revenue
Mexico		$	58,742			$	34,963			$	124,353			$	63,916
China			3,112				4,234				10,342				7,240
U.S.			29,082				5,282				58,890				10,443
Total segment revenue (which also equals consolidated revenue)		$	90,936			$	44,479			$	193,585			$	81,599
Site Contribution
Mexico		$	5,835			$	3,209			$	10,641			$	5,715
China			844				314				1,699				442
U.S.			1,764				(62	)			3,187				(39	)
Total		$	8,443			$	3,461			$	15,527			$	6,118
Corporate allocations			6,046				2,736				8,154				5,371
Unrealized foreign exchange (gain) loss on unsettled forward exchange contracts			—				89				—				(230	)
Interest			2,800				403				5,670				710
Restructuring charges			1,546				96				2,170				96
Earnings (loss) before income taxes		$	(1,949	)		$	137			$	(467	)		$	171

 

 

Three months ended June 30 , 2019		Mexico				U . S .				China				Total
Market Sector:
Test and Measurement		$	19,949			$	9,705			$	865			$	30,519
Retail and Payment Systems			12,149				—				—				12,149
Telecom, Networking and Communications			3,503				2,314				2,200				8,017
Medical			8,093				3,104				47				11,244
Industrial, Power and Clean Technology			9,299				9,122				—				18,421
Semiconductor			5,749				16				—				5,765
Aerospace and Defense			—				4,821				—				4,821
Segment Revenue			58,742				29,082				3,112				90,936

 

 

 

Three months ended July 1, 2018		Mexico				U . S .				China				Total
Market Sector:
Test and Measurement		$	4,750			$	3,548			$	—			$	8,298
Retail and Payment Systems			9,450				—				—				9,450
Telecom, Networking and Communications			2,449				1,393				3,836				7,678
Medical			6,650				36				49				6,735
Industrial, Power and Clean Technology			4,154				305				349				4,808
Semiconductor			7,510				—				—				7,510
Segment Revenue			34,963				5,282				4,234				44,479

 

 

 

Six months ended June 30 , 2019		Mexico				U . S .				China				Total
Market Sector:
Test and Measurement		$	39,865			$	20,765			$	2,450			$	63,080
Retail and Payment Systems			25,078				—				—				25,078
Telecom, Networking and Communications			7,507				4,391				6,884				18,782
Medical			16,501				6,756				440				23,697
Industrial, Power and Clean Technology			22,348				15,159				568				38,075
Semiconductor			13,054				16				—				13,070
Aerospace and Defense			—				11,803				—				11,803
Segment Revenue			124,353				58,890				10,342				193,585

 

 

Six months ended July 1, 2018		Mexico				U . S .				China				Total
Market Sector:
Test and Measurement		$	7,450			$	6,478			$	—			$	13,928
Retail and Payment Systems			16,650				—				—				16,650
Telecom, Networking and Communications			5,350				2,977				6,422				14,749
Medical			14,339				283				49				14,671
Industrial, Power and Clean Technology			7,017				705				769				8,491
Semiconductor			13,110				—				—				13,110
Segment Revenue			63,916				10,443				7,384				81,599

 

The following table contains additions, including those acquired through capital leases, to property, plant and equipment for the and months ended and

 

		Three months ended								Six months ended
		June 30 , 2019				July 1 , 2018				June 30 , 2019				July 1 , 2018
Mexico		$	965			$	2,288			$	1,353			$	2,376
China			23				8				54				8
U.S.			256				552				517				558
Segment total			1,244				2,848				1,924				2,942
Corporate and other			24				107				24				110
Total		$	1,268			$	2,955			$	1,948			$	3,052

 

 

    

 

		June 30 , 201 9				December 30 , 201 8
Mexico		$	11,550			$	11,851
China			872				1,153
U.S			14,308				15,013
Segment total			26,730				28,017
Corporate and other			125				143
Segment assets		$	26,855			$	28,160

 

 

The following table contains geographic revenues based on the product shipment destination, for the and months ended and

 

		Three months ended								Six months ended
		June 30 , 2019				July 1 , 2018				June 30 , 2019				July 1 , 2018
U.S.		$	82,593			$	34,699			$	176,934			$	64,829
Canada			4,860				7,857				9,770				13,018
China			3,483				1,923				6,881				3,752
Total		$	90,936			$	44,479			$	193,585			$	81,599

 

 

Sales of the Company’s products are concentrated in certain cases among specific customers in the same industry. The Company is subject to concentrations of credit risk in trade receivables. The Company considers concentrations of credit risk in establishing the allowance for doubtful accounts and believes the recorded allowances are adequate.

 

The Company expects to continue to depend upon a relatively small number of customers for a significant percentage of its revenue. In addition to having a limited number of customers, the Company manufactures a limited number of products for each customer. If the Company loses any of its larger customers or any product line manufactured for of its larger customers, it could experience a significant reduction in revenue. Also, the insolvency of or more of its larger customers or the inability of or more of its larger customers to pay for its orders could decrease revenue. As many costs and operating expenses are relatively fixed, a reduction in net revenue can decrease profit margins and adversely affect the business, financial condition and results of operations.

 

During the months ended customer exceeded of total revenue, comprising of total revenue across all geographic segments. During the months ended customers exceeded of total revenues comprising ( and respectively) of total revenues. During the months ended customer exceeded of total revenue, comprising of total revenue across all geographic segments. During the months ended customers comprised ( and respectively) of total revenues.

 

As of customers represented more than of the trade accounts receivable. At customers comprised ( and respectively) of the Company’s trade accounts receivable. other customers individually represented more than of trade accounts receivable in either period.