Segment and Enterprise-Wide Disclosures (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Net Sales to Unaffiliated Customers by Geography

Net sales to unaffiliated customers by country were as follows:

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
	(in thousands)				(in thousands)
United States	$	13,937	$	14,506	$	43,620	$	43,485
Germany		3,058		2,885		9,421		8,624
Other countries		7,170		7,431		24,138		22,605
Net Sales	$	24,165	$	24,822	$	77,179	$	74,714