Property and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Components of property and equipment
Property and equipment, gross	$ 78,079,102	$ 78,641,731
Less: accumulated depreciation	(18,643,002)	(14,599,652)
Property and equipment, net	59,436,100	64,042,079
Office equipment and furniture [Member]
Components of property and equipment
Property and equipment, useful life	5 years
Property and equipment, gross	222,853	215,145
Manufacturing equipment [Member]
Components of property and equipment
Property and equipment, gross	56,916,700	57,347,726
Manufacturing equipment [Member] | Minimum [Member]
Components of property and equipment
Property and equipment, useful life	5 years
Manufacturing equipment [Member] | Maximum [Member]
Components of property and equipment
Property and equipment, useful life	10 years
Vehicles [Member]
Components of property and equipment
Property and equipment, useful life	5 years
Property and equipment, gross	125,167	124,211
Construction in progress [Member]
Components of property and equipment
Property and equipment, gross	28,785	330,730
Building and building improvements [Member]
Components of property and equipment
Property and equipment, useful life	20 years
Property and equipment, gross	$ 20,785,597	$ 20,623,919