Annual report pursuant to Section 13 and 15(d)

Concentrations (Details)

v3.20.4
Concentrations (Details) - numberOfCustomers
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Concentration Risk [Line Items]    
Number of customers 1 1
Credit Concentration Risk [Member] | Selling, General and Administrative Expenses    
Concentration Risk [Line Items]    
Concentration percentage 14.30% 13.90%