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

Related party transactions (Q3) (Details)

v3.20.4
Related party transactions (Q3) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2020
Related Party Transactions [Abstract]              
Subordinated convertible notes issued $ 18,240   $ 18,240   $ 16,370 $ 0  
Subordinated convertible notes | Member of board of directors              
Related Party Transactions [Abstract]              
Subordinated convertible notes issued         1,400   $ 800
Interest expense 100   100        
Subordinated convertible notes | Executive | Halo              
Related Party Transactions [Abstract]              
Subordinated convertible notes issued         100    
Marketing services | Member of board of directors              
Related Party Transactions [Abstract]              
Expenses with related party   $ 100   $ 200 200 $ 100  
Due to related party $ 0   $ 0   $ 100