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Concentration (Details) - Revenue [Member]
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Concentration of revenue from customers        
Concentration risk percentage 10.00% 10.00% 10.00% 10.00%
Customer A [Member]        
Concentration of revenue from customers        
Concentration risk percentage [1] 19.00% [1] 13.00%
[1] Less than 10%.