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Major Customers and International Sales (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Summary of International Sales

International sales for 2018, 2017 and 2016 were as follows:

		2018				2017				2016
Asia		$	14,828			$	28,880			$	17,138
South and Central America			86,172				25,748				16,234
Mexico			24,578				16,030				16,690
Europe			11,059				10,700				14,519
Africa			8,027				7,893				7,111
Australia			2,635				4,334				3,735
Canada			3,403				4,083				3,690
Middle East			3,256				1,237				4,041
Other			—				—				101
		$	153,958			$	98,905			$	83,259

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- Definition

Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

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