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Concentration of Credit Risk (Details) - Concentration of Credit Risk
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Cash and Cash Equivalents    
Concentration Risk [Line Items]    
Risk concentration 57.00% 100.00%
Accounts Receivable | One Customer    
Concentration Risk [Line Items]    
Risk concentration 29.00% 66.00%