Segment Information and Foreign Operations

3 Months Ended

Mar. 31, 2013

Segment Information and Foreign Operations [Abstract]

Segment Information and Foreign Operations

Note 10. Segment Information and Foreign Operations

Segment Information

We operate in one segment for the design, development, manufacture and distribution of high-performance compound semiconductor substrates and sale of materials. In accordance with ASC topic 280, Segment Reporting, our chief operating decision-maker has been identified as our Chief Executive Officer, who reviews operating results to make decisions about allocating resources and assessing performance for the Company. Since we operate in one segment, all financial segment and product line information can be found in our condensed consolidated financial statements.

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

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 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

Significant Customers

No customer represented more than 10% of our revenue for the three months ended March 31, 2013. One customer represented 17% of our revenue for the three months ended March 31, 2012.  Our top five customers,although not the same five customers for each period, represented 34% and 46% of our revenue for the three months ended March 31, 2013 and 2012, respectively.

We perform ongoing credit evaluations of our customers' financial condition, and limit the amount of credit extended when deemed necessary, but generally do not require collateral. One customer accounted for 18% and 28% of our trade accounts receivable balance as of March 31, 2013 and December 31, 2012, respectively.