XML 82 R35.htm IDEA: XBRL DOCUMENT v3.19.3
Summary of Significant Accounting Policies - Schedules of Customer Concentration by Risk Factor (Details) - Customer Concentration Risk
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Net Revenue | Customer B          
Concentration Risk [Line Items]          
Concentration risk   10.00% 10.00%    
Net Revenue | Customer C          
Concentration Risk [Line Items]          
Concentration risk 13.00% 16.00% 13.00% 16.00%  
Accounts Receivable | Customer D          
Concentration Risk [Line Items]          
Concentration risk     11.00%   11.00%