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Inventories
9 Months Ended
Sep. 30, 2012
Inventories [Abstract]  
Inventories

3. Inventories

Inventories consisted of the following:

 

                 
    December 31,     September 30,  
    2011     2012  
          (Unaudited)  

Purchased materials

  $ 1,369,041     $ 605,170  

Finished goods

    1,596,877       1,965,977  

Reserve

    (257,837     (259,161
   

 

 

   

 

 

 
    $ 2,708,081     $ 2,311,986