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Inventories
6 Months Ended
Jun. 30, 2011
Inventories
7.             Inventories
 
Inventories consist of the following:
 
   
June 30,
   
December 31,
 
   
2011
   
2010
 
Raw materials
  $ 3,668,586     $ 2,882,944  
Work-in-process
    2,193,774       1,787,473  
Finished goods
    3,309,418       4,279,328  
Total
  $ 9,171,778     $ 8,949,745  
 
Inventories are stated at the lower of cost or market, with cost being determined using the first-in, first-out method. Work-in-process and finished goods inventories include materials, labor, and manufacturing overhead.