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Accounts Receivable (Details) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Accounts Receivable Details    
Accounts receivable $ 4,265,942 $ 4,032,656
Less: Allowance for doubtful accounts (921,643) (786,409)
Accountants receivable, net $ 3,344,299 $ 3,246,247