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Inventories (Tables)
12 Months Ended
Dec. 31, 2012
Inventories [Abstract]  
Inventories
                 
    December 31,  
    2012     2011  

Finished products

  $ 602,753     $ 321,378  

Work-in-process

    666,830       862,000  

Raw materials

    1,402,033       1,662,185  
   

 

 

   

 

 

 

Net inventories

  $ 2,671,616     $ 2,845,563