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								Nine months ended
		September 29 , 201 9				September 30 , 201 8				September 29 , 201 9				September 30 , 201 8
Revenues
Mexico		$	57,328			$	40,485			$	182,424			$	105,139
China			8,092				8,073				22,541				19,092
U.S.			27,426				8,581				86,448				19,167
Total		$	92,846			$	57,139			$	291,413			$	143,398
Intersegment revenue
Mexico		$	(550	)		$	(1,206	)		$	(1,293	)		$	(1,944	)
China			(3,580	)			(2,183	)			(7,687	)			(5,962	)
U.S.			(34	)			(73	)			(166	)			(216	)
Total		$	(4,164	)		$	(3,462	)		$	(9,146	)		$	(8,122	)
Net external revenue
Mexico		$	56,778			$	39,279			$	181,131			$	103,195
China			4,512				5,890				14,854				13,130
U.S.			27,392				8,508				86,282				18,951
Total segment revenue (which also equals consolidated revenue)		$	88,682			$	53,677			$	282,267			$	135,276
Site Contribution
Mexico		$	4,815			$	3,552			$	15,456			$	9,267
China			1,313				556				3,012				998
U.S.			2,191				214				5,378				175
Total		$	8,319			$	4,322			$	23,846			$	10,440
Corporate costs			5,962				2,878				17,227				8,249
Change in fair value of warrant liability			(858	)			—				(919	)			—
Change in fair value of contingent consideration			—				—				(3,050	)			—
Unrealized foreign exchange gain on unsettled forward exchange contracts			—				(108	)			—				(338	)
Interest			2,679				485				8,349				1,195
Restructuring and closure charges			6,454				58				8,624				154
Earnings (loss) before income taxes		$	(5,918	)		$	1,009			$	(6,385	)		$	1,180

 

 

Three months ended September 29 , 2019		Mexico				U . S .				China				Total
Market Sector:
Test and Measurement		$	19,188			$	8,287			$	—			$	27,475
Retail and Payment Systems			10,460				—				—				10,460
Telecom, Networking and Communications			3,986				1,393				4,192				9,571
Medical			7,861				2,637				40				10,538
Industrial, Power and Clean Technology			10,154				9,851				280				20,285
Semiconductor			5,129				—				—				5,129
Aerospace and Defense			—				5,224				—				5,224
Segment Revenue			56,778				27,392				4,512				88,682

 

 

 

Three months ended September 30 , 2018		Mexico				U . S .				China				Total
Market Sector:
Test and Measurement		$	3,277			$	7,181			$	—			$	10,458
Retail and Payment Systems			10,815				—				—				10,815
Telecom, Networking and Communications			3,596				833				5,613				10,042
Medical			7,400				91				37				7,528
Industrial, Power and Clean Technology			6,495				403				240				7,138
Semiconductor			7,696				—				—				7,696
Segment Revenue			39,279				8,508				5,890				53,677

 

 

 

Nine months ended September 29 , 2019		Mexico				U . S .				China				Total
Market Sector:
Test and Measurement		$	59,054			$	29,054			$	2,447			$	90,555
Retail and Payment Systems			35,537				—				—				35,537
Telecom, Networking and Communications			11,495				5,783				11,078				28,356
Medical			24,362				9,393				482				34,237
Industrial, Power and Clean Technology			32,502				25,008				847				58,357
Semiconductor			18,181				16				—				18,197
Aerospace and Defense			—				17,028				—				17,028
Segment Revenue			181,131				86,282				14,854				282,267

 

 

 

Nine months ended September 30 , 2018		Mexico				U . S .				China				Total
Market Sector:
Test and Measurement		$	10,772			$	14,039			$	—			$	24,811
Retail and Payment Systems			27,215				—				—				27,215
Telecom, Networking and Communications			9,053				3,672				12,022				24,747
Medical			21,788				270				44				22,102
Industrial, Power and Clean Technology			13,561				970				1,064				15,595
Semiconductor			20,806				—				—				20,806
Segment Revenue			103,195				18,951				13,130				135,276

 

 

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								Nine months ended
		September 29 , 2019				September 30 , 2018				September 29 , 2019				September 30 , 2018
Mexico		$	859			$	1,287			$	2,212			$	3,663
China			98				190				152				198
U.S.			446				21				963				579
Segment total			1,403				1,498				3,327				4,440
Corporate and other			—				7				24				117
Total		$	1,403			$	1,505			$	3,351			$	4,557

 

 

    

 

		September 29 , 201 9				December 30 , 201 8
Mexico		$	11,560			$	11,851
China			630				1,153
U.S			14,047				15,013
Segment total			26,237				28,017
Corporate and other			111				143
Segment assets		$	26,3489			$	28,160

 

 

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

 

		Three months ended								Nine months ended
		September 29 , 2019				September 30 , 2018				September 29 , 2019				September 30 , 2018
U.S.		$	83,276			$	43,324			$	260,210			$	108,153
Canada			3,916				7,413				13,686				20,431
China			1,490				2,940				8,371				6,692
Total		$	88,682			$	53,677			$	282,267			$	135,276

 

 

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.