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Inventories
6 Months Ended
Jun. 30, 2011
Inventories [Abstract]  
Inventories
3.   Inventories
    The major components of inventories are as follows:
                 
    June 30, 2011     Dec 31, 2010  
Raw materials
  $ 1,793,037     $ 1,403,875  
Work-in-progress
    314,514       294,006  
Finished goods
    1,536,976       1,493,226  
Reduction to LIFO cost
    (1,066,922 )     (993,043 )
 
           
 
               
Total Inventory
  $ 2,577,605     $ 2,198,064