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Concentration of Credit Risk (Details Textual) (USD $)
6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Accounts Receivable $ 10,069,378   $ 8,883,106
Concentration Risk, Percentage 10.00% 10.00%  
Customer A [Member]
     
Accounts Receivable 2,092,000 1,411,000  
Customer A [Member] | Accounts Receivable [Member]
     
Concentration Risk, Percentage 20.80% 18.50%  
Customer B [Member]
     
Accounts Receivable $ 1,541,000 $ 1,209,000  
Customer B [Member] | Accounts Receivable [Member]
     
Concentration Risk, Percentage 15.30% 15.80%