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Inventories
6 Months Ended
Jun. 30, 2012
Inventories
7.
Inventories
 
Inventories consist of the following:
 
   
June 30,
   
December 31,
 
   
2012
   
2011
 
Raw materials
  $ 5,502,367     $ 4,091,366  
Work-in-process
    1,704,424       1,503,565  
Finished goods
    3,569,997       1,707,552  
Total
  $ 10,776,788     $ 7,302,483  
 
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.