9. Industry Segment and Geographic Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Revenues by Geographic Territory

	Year ended December 31,
	2017		2016		2015
United States	$	93,082	$	91,092	$	94,840
Germany		8,172		6,396		7,156
Other countries less than 5% of revenues		45,341		45,999		43,737
Total	$	146,595	$	143,487	$	145,733

Revenue by Product Line

	2017		2016		2015
Fluid Delivery	$	65,053	$	60,889	$	60,630
Cardiovascular		48,073		47,064		46,463
Ophthalmology		13,537		15,427		18,253
Other		19,932		20,107		20,387
Total	$	146,595	$	143,487	$	145,733