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Customer Concentration (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Revenues [Member]        
Customer Concentration (Textual)        
Concentration risk, percentage 10.00% 78.00% 10.00% 51.00%