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Inventories
3 Months Ended
Mar. 31, 2012
Inventories [Abstract]  
Inventories

3. Inventories

Inventories consisted of the following:

 

                 
    December 31,     March 31,  
    2011     2012  
          (Unaudited)  

Purchased materials

  $ 1,369,041     $ 1,756,405  

Finished goods

    1,596,877       1,040,610  

Reserve

    (257,837     (257,837
   

 

 

   

 

 

 
    $ 2,708,081     $ 2,539,178