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Geographic Information (Tables)
3 Months Ended
Aug. 31, 2012
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
 

Three Months Ended

 

August 31,

 

2012

 

2011

Revenues from sales to unaffiliated customers:

         

         United States

$

279,509

 

$

186,449

         Asia

 

901,666

   

631,752

         Europe

 

508,167

   

580,918

         South America

 

236

   

1,357

         Middle East

 

11,385

   

4,170

         Other

 

986

 

 

3,019

Total  revenues from sales to unaffiliated customers

$

1,701,949

 

$

1,407,665