Quarterly report pursuant to Section 13 or 15(d)

Segment, Geographical and Other Revenue Information - Concentration Risk (Details)

v3.19.3
Segment, Geographical and Other Revenue Information - Concentration Risk (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 Concentration Risk [Member] | Customer A [Member] | Sales [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage 21.00% 27.00% 31.00% 33.00%  
Customer Concentration Risk [Member] | Customer B [Member] | Sales [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage   28.00% 17.00% 24.00%  
Customer Concentration Risk [Member] | Customer C [Member] | Sales [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage   10.00%   17.00%  
Customer Concentration Risk [Member] | Customer D [Member] | Sales [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage 29.00% 15.00% 15.00% 11.00%  
Credit Concentration Risk [Member] | Customer A [Member] | Accounts Receivable [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage     20.00%   37.00%
Credit Concentration Risk [Member] | Customer B [Member] | Accounts Receivable [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage         17.00%
Credit Concentration Risk [Member] | Customer D [Member] | Accounts Receivable [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage         11.00%
Credit Concentration Risk [Member] | Customer E [Member] | Accounts Receivable [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage     14.00%    
Credit Concentration Risk [Member] | Customer F [Member] | Accounts Receivable [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage     15.00%    
Credit Concentration Risk [Member] | Customer G [Member] | Accounts Receivable [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage         16.00%
Credit Concentration Risk [Member] | Customer H [Member] | Accounts Receivable [Member]          
Concentration Risk [Line Items]          
Concentration risk, percentage     16.00%