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Segment Reporting and Geographic Information
6 Months Ended
Jun. 30, 2013
Segment Reporting and Geographic Information [Abstract]  
Segment Reporting Disclosure [Text Block]
Segment Reporting and Geographic Information
The Company has one reportable segment. Operating segments are business units that have separate financial information and are separately reviewed by the Company’s chief decision maker. The Company’s chief decision maker is the Chief Executive Officer. The Company is engaged in the design, development, manufacture and support of defect inspection, advanced packaging lithography, process control metrology, and data analysis systems and software used by microelectronic device manufacturers worldwide. The Company and its subsidiaries currently operate in a single reportable segment: the design, development, manufacture and support of defect inspection, advanced packaging lithography, process control metrology, and data analysis systems and software used by microelectronics device manufacturers. The chief operating decision maker allocates resources and assesses performance of the business and other activities at the reporting segment level.

    
The following table lists the different sources of revenue:


Three Months Ended
 
Six Months Ended


June 30,
 
June 30,


2013

2012
 
2013

2012
Systems and Software:


 


 
 

 


 
Inspection

$
26,829


58
%

$
33,949


60
%
 
$
51,708


59
%

$
56,805


56
%
Metrology

5,869


13
%

8,782


16
%
 
6,157


7
%

19,019


19
%
Lithography
 

 
%
 

 
%
 
3,700


4
%



%
Data Analysis and Review

4,856


11
%

5,584


10
%
 
9,013


10
%

10,131


10
%
Parts

5,255


11
%

5,146


9
%
 
10,801


13
%

10,650


10
%
Services

3,250


7
%

2,865


5
%
 
6,330


7
%

5,430


5
%
Total revenue

$
46,059


100
%

$
56,326


100
%
 
$
87,709


100
%

$
102,035


100
%
 
    
For geographical revenue reporting, revenues are attributed to the geographic location in which the product is shipped.  Revenue by geographic region is as follows: 
 
Three Months Ended
 
Six Months Ended

June 30,
 
June 30,

2013

2012
 
2013
 
2012
United States
$
10,077

 
$
8,783

 
$
19,478

 
$
18,137

Taiwan
19,490

 
15,269

 
32,621

 
23,934

Japan
1,319

 
4,007

 
3,707

 
5,401

China
4,520

 
4,076

 
7,269

 
5,989

South Korea
1,644

 
10,842

 
5,067

 
25,334

Other Asia
3,167

 
4,899

 
8,575

 
10,003

Austria
174

 
4,982

 
460

 
7,580

Germany
1,550

 
1,368

 
4,075

 
1,741

Other Europe
4,118

 
2,100

 
6,457

 
3,916

Total revenue
$
46,059

 
$
56,326

 
$
87,709

 
$
102,035



Customers comprising 10% or more of revenue:
 
Six Months Ended

June 30,

2013
 
2012
Customer A
11.0
%
 
1.7
%
Customer B
10.8
%
 
5.3
%
Customer C
10.0
%
 
7.1
%
Customer D
2.1
%
 
18.4
%
Customer E
1.1
%
 
12.5
%