Segment Information and Foreign Operations (Tables)

3 Months Ended

Mar. 31, 2013

Segment Information and Foreign Operations [Abstract]

Product Information

The following table represents revenue amounts (in thousands) by product type:

	Three Months Ended March 31,
	2013		2012
Product type:
GaAs substrates	$	11,723	$	12,231
InP substrates		1,849		1,451
Ge substrates		2,551		2,630
Raw materials and other		6,257		7,174
Total	$	22,380	$	23,486

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 March 31,
	2013		2012
Geographical information:
China	$	6,029	$	5,774
Europe (primarily Germany)		4,689		4,565
Taiwan		3,779		2,046
North America (primarily the United States)		3,469		5,167
Japan		2,282		2,189
Asia Pacific (excluding China, Japan and Taiwan)		2,132		3,745
Total	$	22,380	$	23,486

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
	March 31,		December 31,
	2013		2012
Long-lived assets by geographic region:
North America	$	337	$	430
China		37,140		36,805
	$	37,477	$	37,235