Quarterly report pursuant to Section 13 or 15(d)

Customer Concentration (Details)

v3.19.3
Customer Concentration (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Customer A [Member] | Total Revenues from External Customers [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage 24.00% 24.00% 28.00% 27.00%  
Customer A [Member] | Accounts Receivable from External Customers [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage     20.00%   35.00%
Customer B [Member] | Total Revenues from External Customers [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage 18.00% 21.00% 19.00% 22.00%  
Customer B [Member] | Accounts Receivable from External Customers [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage     17.00%   23.00%
Customer C [Member] | Total Revenues from External Customers [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage 22.00% 21.00% 20.00% 23.00%  
Customer C [Member] | Accounts Receivable from External Customers [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage     15.00%   30.00%
Customer D [Member] | Total Revenues from External Customers [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage 19.00% 24.00% 21.00% 18.00%  
Customer D [Member] | Accounts Receivable from External Customers [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage     21.00%    
Customer E [Member] | Total Revenues from External Customers [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage   0.00%   0.00%  
Customer E [Member] | Accounts Receivable from External Customers [Member]          
Concentration Risk [Line Items]          
Concentration Risk, Percentage     14.00%   0.00%