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

Stockholders' deficit, Incentive Award Plan (FY) (Details)

v3.20.2
Stockholders' deficit, Incentive Award Plan (FY) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 19, 2019
May 06, 2019
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 20, 2019
Nov. 11, 2019
Apr. 29, 2019
Stock Options [Abstract]                    
Shares granted (in shares)           2,503,371        
Shares granted, exercise price (in dollars per share)           $ 1.83        
Accelerated vesting expense   $ 2,200                
Shares acquired (in shares)           5,250,000        
Shares acquired, exercise price (in dollars per share)           $ 1.82        
Option outstanding (in shares)           7,791,833 38,462      
Shares vested (in shares)           2,716,791 38,462      
Stock Options [Member]                    
Stock Options [Abstract]                    
Shares granted (in shares)     160,000 300,000 5,993,000   38,462      
Shares granted, exercise price (in dollars per share)             $ 6.76      
Accelerated vesting expense             $ 100      
2019 Incentive Award Plan [Member]                    
Stock Options [Abstract]                    
Authorized issuance shares of common stock (in shares)           6,000,000       6,000,000
Percent of common stock outstanding           10.00%        
Option outstanding (in shares)           7,753,371 164,356      
2019 Incentive Award Plan [Member] | Stock Options [Member]                    
Stock Options [Abstract]                    
Shares granted (in shares)   2,503,371                
Option outstanding (in shares)             164,356      
Shares vested (in shares)           912,917        
2019 Incentive Award Plan [Member] | Stock Options [Member] | Management [Member]                    
Stock Options [Abstract]                    
Shares acquired (in shares)   5,250,000                
Shares acquired, exercise price (in dollars per share)   $ 5.00                
Award monthly vesting percentage   4.167%                
Amended and Restated Incentive Award Plan 2019 [Member]                    
Stock Options [Abstract]                    
Authorized issuance shares of common stock (in shares) 9,000,000                  
Number of awards available for issuance (in shares)               9,000,000 6,000,000  
Exercise price of options, lower (in dollars per share) $ 1.82                  
Increase in fair value of vested options $ 600                  
Increase in fair value of unvested options $ 800