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Concentrations (Details) (Sales revenue [Member])	3 Months Ended
Concentrations (Details) (Sales revenue [Member])	Mar. 31, 2013	Mar. 31, 2012
Customer A [Member]
Concentration of revenue from customers
Concentration risk supplier, Percentage	14.00%
Concentration risk, Supplier		Less than 10%.
Customer B [Member]
Concentration of revenue from customers
Concentration risk supplier, Percentage	10.00%
Concentration risk, Supplier		Less than 10%.
Customer C [Member]
Concentration of revenue from customers
Concentration risk supplier, Percentage		11.00%
Concentration risk, Supplier	Less than 10%.

Description of risks that arise due to the volume of business transacted with a particular supplier or reliance placed on that supplier. At a minimum, the description informs financial statement users of the general nature of the risk.

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