Annual report pursuant to Section 13 and 15(d)

Customer Concentration - Schedule of Customer Concentration (Details)

v3.20.4
Customer Concentration - Schedule of Customer Concentration (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Customer A [Member] | Total Revenues from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 24.00% 27.00% 28.00%
Customer A [Member] | Accounts Receivable, Net from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 31.00% 21.00%  
Customer B [Member] | Total Revenues from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 15.00% 18.00% 21.00%
Customer B [Member] | Accounts Receivable, Net from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 21.00% 13.00%  
Customer C [Member] | Total Revenues from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 17.00% 19.00% 23.00%
Customer C [Member] | Accounts Receivable, Net from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage   22.00%  
Customer D [Member] | Total Revenues from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 18.00% 20.00% 19.00%
Customer D [Member] | Accounts Receivable, Net from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 22.00% 13.00%  
Customer E [Member] | Total Revenues from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage     0.00%
Customer E [Member] | Accounts Receivable, Net from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage   13.00%  
Customer F [Member] | Total Revenues from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage 11.00%    
Customer F [Member] | Accounts Receivable, Net from External Customers [Member]      
Concentration Risk [Line Items]      
Concentration Risk, Percentage   14.00%