Segment Information and Foreign Operations (Tables)

9 Months Ended

Sep. 30, 2015

Segment Information and Foreign Operations [Abstract]

Revenue reported for products shipped to customers in the corresponding geographic region

The following table represents revenue amounts (in thousands) reported for products shipped to customers in the corresponding geographic region:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Geographical region:
Europe (primarily Germany)	$	4,385	$	5,429	$	14,992	$	16,980
Taiwan		4,131		3,835		10,654		8,735
China		3,296		4,298		10,154		13,423
Asia Pacific (excluding China, Taiwan and Japan)		2,750		3,537		8,277		8,376
Japan		1,939		3,511		7,176		9,281
North America (primarily the United States)		1,870		2,528		8,192		7,137
Total	$	18,371	$	23,138	$	59,445	$	63,932

Long-lived assets by geographic region

Long-lived assets consist primarily of property, plant and equipment, and are attributed to the geographic location in which they are located. Long-lived assets by geographic region were as follows (in thousands):

	As of
	September 30,		December 31,
	2015		2014
Long-lived assets by geographic region:
North America	$	698	$	136
China		31,648		33,726
	$	32,346	$	33,862