Quarterly report pursuant to Section 13 or 15(d)

Certain Risks and Concentrations (Details)

v3.19.3
Certain Risks and Concentrations (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Major Customers [Member] | Customer A [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 25.00% 33.00% 16.00% 21.00%
Major Customers [Member] | Customer B [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 17.00% [1] [1] [1]
Major Customers [Member] | Customer C [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 16.00% 15.00% 21.00% 19.00%
Major Customers [Member] | Customer D [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 13.00% [1] [1] [1]
Major Customers [Member] | Customer E [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage [1] [1] 11.00% [1]
Major Customers [Member] | Customer F [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage [1] [1] 14.00% [1]
Major Suppliers [Member] | Supplier A [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 32.00% [1] 17.00% 20.00%
Major Suppliers [Member] | Supplier B [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 27.00% 12.00% 14.00%
Major Suppliers [Member] | Supplier C [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage [1] [1] 16.00% [1]
Major Suppliers [Member] | Supplier D [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage [1] [1] 16.00% [1]
Major Suppliers [Member] | Supplier E [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage [1] [1] 14.00% [1]
[1] less than 10%