Segment Information and Foreign Operations

3 Months Ended

Mar. 31, 2014

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 EndedMarch 31,
	2014		2013
Product type:
GaAs substrates	$	8,488	$	11,723
InP substrates		2,180		1,849
Ge substrates		3,278		2,551
Raw materials and other		5,399		6,257
Total	$	19,345	$	22,380

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

	Three Months EndedMarch 31,
	2014		2013
Geographical information:
Europe (primarily Germany)	$	6,583	$	4,689
China		4,165		6,029
Asia Pacific (excluding China, Japan and Taiwan)		2,389		2,132
Taiwan		2,115		3,779
Japan		2,313		2,282
North America (primarily the United States)		1,780		3,469
Total	$	19,345	$	22,380

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,
	2014		2013
Long-lived assets by geographic region:
North America	$	179	$	204
China		36,000		37,417
	$	36,179	$	37,621

Significant Customers

No customer represented more than 10% of our revenue for the three months ended March 31, 2014 and 2013. Our top five customers,although not the same five customers for each period, represented 39% and 34% of our revenue for the three months ended March 31, 2014 and 2013, 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. No customer accounted for over 10% of our trade accounts receivable balance as of March 31, 2014 while one customer accounted for 20% of our trade accounts receivable balance as of December 31, 2013.