Concentrations
 3 Months Ended 12 Months Ended
Mar. 31, 2012
Dec. 31, 2011
Concentrations [Abstract]    
Concentrations
Note 9:  Concentrations

For the three months ended March 31, 2012, approximately 52% of the company's net revenues were derived from customers in the United States and approximately 48% of the Company's net revenues were derived from international customers.   For the three months ended March 31, 2011, approximately 74% of the company's net revenues were derived from customers in the United States and approximately 26% of the Company's net revenues were derived from international customers.  

The following is a schedule of revenue by geographic location (in thousands):

   
Three Months Ended
March 31,
(unaudited)
  
   
2012
    
2011
  
North America
  
$
3,375
    
$
4,095
  
Europe, Middle East and Africa
    
2,042
      
814
  
Asia
    
720
      
532
  
Total
  
$
6,137
    
$
5,441
  
 
The Company purchases principally all of its silicon wafers from a single supplier located in Taiwan.

Note 12 - CONCENTRATIONS

The following is a schedule of domestic and international revenue as a percentage of total net revenues:

  For the years ended December 31,  
  2011   2010   2009  
Domestic 63 % 66 % 57 %
International 37 % 34 % 43 %

 

The following is a schedule of revenue by geographic location (in thousands):

    For the years ended December 31,
    2011   2010   2009
North and South America $ 19,068 $ 20,609 $ 13,742
Europe, Middle East, and Africa   7,107   6,874   5,939
Asia Pacific   3,006   2,975   4,141
Total $ 29,181 $ 30,458 $ 23,822

 

The Company purchases principally all of its silicon wafers from a single supplier located in Taiwan.

In 2011, there was no customer that accounted for more than 10% of its net revenue and there was one customer that accounted for approximately 13% and 12% of its net revenue in 2010 and 2009, respectively.

At December 31, 2011 and 2010, there were 10 customers who comprised 59% and 74%, respectively, of the outstanding accounts receivable. The Company had no customers that accounted for more than 10% of its outstanding receivable in 2011 and three customers that each accounted for more than 10% of its outstanding accounts receivable in 2010.