Land use rights, net (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Total	$ 4,408,740		$ 4,408,740		$ 3,132,965
Land Use Right [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	4,748,820		4,748,820		3,405,396
Accumulated amortization	(340,080)		(340,080)		(272,431)
Total	4,408,740		4,408,740		3,132,965
Lease terms of land use rights			50 years
Amortization expenses	23,502	16,399	66,332	49,562
Land Use Right, Land Located in Huizhou [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	3,416,123		3,416,123		3,405,396
Area of land	126,605		126,605
Land rights expiry date			May 23, 2057
Land Use Right Land, Located in Ganzhou [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	$ 1,332,697		$ 1,332,697
Area of land	58,669		58,669
Land rights expiry date			Jan. 04, 2062