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Business Segment, Geographic Areas and Major Customers (Tables)

3 Months Ended

Mar. 31, 2015

Product sales by geographic location were as follows:


	Three Months Ended March 31,
	2015		2014
	(in thousands)
United States	$	42,189	$	33,788
Germany		12,741		14,678
International, excluding Germany		15,091		18,006

	$	70,021	$	66,472