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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment  
Property, Plant and Equipment

(5) Property, Plant and Equipment

        Property, plant and equipment at December 31, 2012 and 2011 consisted of the following:

 
  2012   2011   Estimated
useful
lives

Land

  $ 200,000   $ 200,000  

Buildings

    759,281     759,281   27 years

Machinery and equipment

    5,682,609     3,552,316   3 to 10 years

Office equipment

    2,880,938     1,278,375   2 to 15 years

Leasehold improvements

    2,226,065     1,242,996   1 to 15 years

Vehicles

    477,445     288,909   3 to 5 years
             

Total property, plant and equipment

    12,226,338     7,321,877    

Less accumulated depreciation

    (6,876,028 )   (4,147,129 )  
             

Net property, plant and equipment

  $ 5,350,310   $ 3,174,748    
             

        Depreciation of property, plant and equipment was $1,042,606, $530,326 and $453,810 for the years ended December 31, 2012, 2011 and 2010, respectively.