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Accounts Receivable (Details Textual) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Accounts Receivable (Textual)        
Increase in allowance for doubtful accounts $ 27,378 $ 389,195    $ 76,784