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Geographical Information (Tables)
3 Months Ended
Jun. 30, 2012
Geographical Information [Abstract]  
Net sales by geographic region
For geographical reporting, revenues are attributed to the geographic location in which the customers' facilities are located.  Long-lived assets consist of property, plant and equipment and are attributed to the geographic location in which they are located.  Net sales by geographic region were as follows:

   
Revenue for the
 
   
Three Months Ended
 
   
June 30,
 
   
2012
  
2011
 
Sales to customers located in:
      
United States
 $25  $19 
Total sales
 $25  $19