Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Customer represented more than 10% of total net revenues (Details)

v3.19.2
Summary of Significant Accounting Policies - Customer represented more than 10% of total net revenues (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Concentration Risk, Percentage 80.00%        
Sales Revenue, Net [Member]          
Concentration Risk, Percentage       10.00% 10.00%
Accounts Receivable [Member]          
Concentration Risk, Percentage       10.00%  
Customer A [Member] | Sales Revenue, Net [Member]          
Concentration Risk, Percentage   27.00% 23.00% 25.00% 25.00%
Customer A [Member] | Accounts Receivable [Member]          
Concentration Risk, Percentage       18.00%  
Customer B [Member] | Sales Revenue, Net [Member]          
Concentration Risk, Percentage         11.00%
Customer B [Member] | Accounts Receivable [Member]          
Concentration Risk, Percentage       17.00%