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Property, Plant and Equipment (Tables)
3 Months Ended
Mar. 31, 2013
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
   
March 31,
2013
   
December 31,
2012
 
Property, Plant, and Equipment:
           
Land use rights
 
$
9,961,400
   
$
9,895,081
 
Building and improvements
   
31,837,778
     
31,625,816
 
Machinery and equipment
   
112,609,578
     
111,857,002
 
Vehicles
   
441,949
     
439,007
 
Construction in progress
   
2,645,773
     
1,315,664
 
     
157,496,478
     
155,132,570
 
Less accumulated depreciation and amortization
   
(34,896,581
)
   
(32,741,114
)
Property, Plant and Equipment, net
 
$
122,599,897
   
$
122,391,456