Property and Equipment (Details) (USD $)	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Components of property and equipment
Property and equipment, gross	$ 85,351,122	$ 78,641,731
Less: accumulated depreciation	(19,385,303)	(14,599,652)
Property and equipment, net	65,965,819	64,042,079
Office equipment and furniture [Member]
Components of property and equipment
Property and equipment, useful life	5 years
Property and equipment, gross	220,447	215,145
Manufacturing equipment [Member]
Components of property and equipment
Property and equipment, gross	64,252,326	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	124,813	124,211
Construction in progress [Member]
Components of property and equipment
Property and equipment, gross	26,679	330,730
Building and building improvements [Member]
Components of property and equipment
Property and equipment, useful life	20 years
Property and equipment, gross	$ 20,726,857	$ 20,623,919