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Concentration of Credit Risk (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Accounts Receivable, Net, Current $ 9,481,084   $ 9,481,084   $ 14,838,978
Customer A [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Concentration Risk, Percentage 24.20% 22.90% 27.80% 27.70%  
Customer A [Member] | Accounts Receivable [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Concentration Risk, Percentage     19.60% 13.90%  
Accounts Receivable, Net, Current $ 1,491,000 $ 1,411,000 $ 1,491,000 $ 1,411,000  
Customer B [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Concentration Risk, Percentage 17.30% 22.80% 15.60% 18.40%  
Customer B [Member] | Accounts Receivable [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Concentration Risk, Percentage     21.50% 26.10%  
Accounts Receivable, Net, Current $ 1,631,000 $ 2,653,000 $ 1,631,000 $ 2,653,000  
Two Customers [Member]          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Concentration Risk, Percentage 10.00%