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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2011
Components of Property, Plant and Equipment
 December 31, December 31,
2011  2010  
Furniture and fixtures $180,800 $156,466
Equipment  4,680,118  4,117,984
Buildings and improvements  1,748,214  1,580,597
Land  117,513  115,899
Building construction in progress  146,650  100,865
  6,873,295  6,071,811
Accumulated depreciation  (4,040,146)  (3,543,379)
 $2,833,149 $2,528,432