Quarterly report pursuant to Section 13 or 15(d)

Customer Concentration (Details)

v3.10.0.1
Customer Concentration (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Revenue [Member] | Major customers [Member]        
Concentration Risk [Line Items]        
Concentration risk, percentage 60.10% 65.40% 61.40% 64.70%