Concentrations (Details) (Purchase [Member])	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Supplier A [Member]
Concentration of purchases from suppliers
Concentration risk supplier, Percentage	22.00%
Concentration risk, Supplier		Less than 10
Supplier B [Member]
Concentration of purchases from suppliers
Concentration risk supplier, Percentage	20.00%
Concentration risk, Supplier		Less than 10
Supplier C [Member]
Concentration of purchases from suppliers
Concentration risk supplier, Percentage		17.00%
Concentration risk, Supplier	Less than 10
Supplier D [Member]
Concentration of purchases from suppliers
Concentration risk supplier, Percentage	18.00%	14.00%
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