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Property, Plant and Equipment (Tables)
3 Months Ended
Mar. 31, 2012
Components of Property, Plant and Equipment
 March 31, December 31,
2012 2011
Furniture and fixtures $184,273 $180,800
Equipment and software 4,851,949  4,680,118
Buildings and improvements  1,768,677  1,748,214
Land  117,790  117,513
Building construction in progress  146,650  146,650
  7,069,339  6,873,295
Accumulated depreciation  (4,190,075)  (4,040,146)
 $2,879,264 $2,833,149