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Concentrations (Details) - Firms
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Accounts Receivable [Member]    
Concentration Risk [Line Items]    
Number of customers 2 1
Percentage of concentrations of credit risk 100.00% 100.00%
Revenues [Member]    
Concentration Risk [Line Items]    
Number of customers 2 4
Percentage of concentrations of credit risk 71.00% 92.00%