Concentrations (Details) (Purchase [Member])	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Supplier A [Member]
Concentration of purchases from suppliers
Concentration risk supplier, Percentage	17.00%
Concentration risk, Supplier		Less than 10
Supplier B [Member]
Concentration of purchases from suppliers
Concentration risk supplier, Percentage	11.00%
Concentration risk, Supplier		Less than 10
Supplier C [Member]
Concentration of purchases from suppliers
Concentration risk supplier, Percentage	14.00%	13.00%
Supplier D [Member]
Concentration of purchases from suppliers
Concentration risk supplier, Percentage		13.00%
Concentration risk, Supplier	Less than 10
Supplier E [Member]
Concentration of purchases from suppliers
Concentration risk supplier, Percentage		12.00%
Concentration risk, Supplier	Less than 10
Supplier F [Member]
Concentration of purchases from suppliers
Concentration risk supplier, Percentage		11.00%
Concentration risk, Supplier	Less than 10