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Property And Equipment (Details) (USD $)
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 29,722,518 $ 28,498,312 $ 29,243,398
Less accumulated depreciation 14,856,729 13,261,033 14,044,576
Total property and equipment 14,865,789 15,237,279 15,198,822
Depreciation expense 812,154 767,207  
Land [Member]
     
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 1,178,160 1,178,160 1,178,160
Building And Improvements [Member]
     
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 11,684,498 11,477,053 11,633,077
Machinery And Equipment [Member]
     
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 15,070,709 14,112,020 14,697,024
Office Equipment [Member]
     
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 409,561 366,064 383,099
Vehicles [Member]
     
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 1,379,590 1,211,760 1,334,628
Construction in Progress [Member]
     
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 0 $ 153,255 $ 17,410