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 revenues 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
		April 1 , 201 8				April 2 , 201 7
Revenues
Mexico		$	29,073			$	22,491
China			5,233				8,322
U.S.			5,255				4,982
Total		$	39,561			$	35,795
Intersegment revenue
Mexico		$	(120	)		$	(12	)
China			(2,227	)			(2,511	)
U.S.			(94	)			(94	)
Total		$	(2,441	)		$	(2,617	)
Net external revenue
Mexico		$	28,953			$	22,479
China			3,006				5,811
U.S.			5,161				4,888
Total segment revenue (which also equals consolidated revenue)		$	37,120			$	33,178
Site Contribution
Mexico		$	2,506			$	1,347
China			128				425
U.S.			23				(435	)
Total		$	2,657			$	1,337
Corporate allocations			2,635				2,814
Unrealized foreign exchange gain on unsettled forward exchange contracts			(319	)			(1,272	)
Interest			307				179
Income (loss) before income taxes		$	34			$	(384	)

 

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

 

		Three months ended
		April 1 , 201 8				April 2 , 201 7
Mexico		$	88			$	155
China			—				66
U.S.			6				75
Segment total			94				296
Corporate and other			3				5
Total		$	97			$	301

    

 

		April 1 , 201 8				December 3 1, 2017
Mexico		$	7,058			$	7,518
China			1,262				1,380
U.S			1,110				1,188
Segment total			9,430				10,086
Corporate and other			162				183
Segment assets		$	9,592			$	10,269

 

 

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

 

		Three months ended
		April 1 , 201 8				April 2 , 201 7
U.S.		$	30,130			$	25,938
Canada			5,161				5,422
China			1,829				1,311
Africa			—				507
Total		$	37,120			$	33,178

 

 

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 customers exceeded of total revenues, comprising of of total revenue across all geographic segments. During the months ended customer exceeded of total revenues, comprising of of total revenue across all geographic segments.

 

As of customers represented and ( customers represented and respectively of the Company’s trade accounts receivable. other customers exceeded of the Company’s trade accounts receivable.