General form of registration statement for all companies including face-amount certificate companies

Major suppliers (Q3) (Details)

v3.20.4
Major suppliers (Q3) (Details) - Inventory purchases - Supplier concentration risk
9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Concentration Risk [Line Items]        
Concentration risk percentage     74.00% 70.00%
Three vendors        
Concentration Risk [Line Items]        
Concentration risk percentage 78.00%      
One vendor        
Concentration Risk [Line Items]        
Concentration risk percentage   85.00%