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Segment Information
 3 Months Ended
Mar. 31, 2012
Segment Reporting [Abstract]  
Segment Information
SEGMENT INFORMATION

We have identified a single operating segment: the design and development of integrated circuits for use in electronic display devices. A majority of our assets are located in the United States.

Geographic Information

Revenue by geographic region, attributed to countries based on the domicile of the end customer, is as follows:
 
 
Three Months Ended
 
March 31,
 
2012
 
2011
Japan
$
7,432

 
$
9,741

U.S.
2,307

 
524

Taiwan
2,056

 
2,113

China
1,077

 
461

Europe
499

 
682

Korea
297

 
559

Other
662

 
620

 
$
14,330

 
$
14,700



Significant Customers
The percentage of revenue attributable to our distributors, top five end customers, and individual distributors or end customers that represented more than 10% of revenue in at least one of the periods presented, is as follows:
 
 
Three Months Ended
 
March 31,
 
2012
 
2011
Distributors:
 
 
 
All distributors
67
%
 
64
%
Distributor A
45
%
 
46
%
End customers: 1
 
 
 
Top five end customers
47
%
 
57
%
End customer A
14
%
 
—
%
End customer B
7
%
 
20
%
End customer C
3
%
 
11
%

1 
End customers included customers who purchase directly from us, as well as customers who purchase our products indirectly through distributors.

The following accounts represented 10% or more of total accounts receivable in at least one of the periods presented: