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Property And Equipment (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 30,963,211 $ 29,474,985 $ 30,638,602
Less accumulated depreciation 16,045,951 14,443,621 15,651,826
Total property and equipment 14,917,260 15,031,364 14,986,776
Depreciation expense 394,125 399,045  
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 11,972,226 11,656,233 11,904,919
Machinery And Equipment [Member]
     
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 15,865,429 14,777,420 15,185,204
Office Equipment [Member]
     
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 429,013 404,905 411,773
Vehicles [Member]
     
Property, Plant and Equipment [Line Items]      
Property and equipment, gross 1,350,608 1,347,228 1,346,078
Construction in Progress [Member]
     
Property, Plant and Equipment [Line Items]      
Property and equipment, gross $ 167,775 $ 111,039 $ 612,468