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

Stockholders' deficit, Warrants (FY) (Details)

v3.20.2
Stockholders' deficit, Warrants (FY) (Details) - USD ($)
$ / shares in Units, $ in Millions
 8 Months Ended 9 Months Ended 12 Months Ended
Dec. 19, 2019
Nov. 04, 2019
Sep. 17, 2019
May 06, 2019
Dec. 31, 2019
Sep. 30, 2020
Dec. 31, 2018
Jun. 24, 2020
Jun. 23, 2020
Jun. 01, 2020
Dec. 12, 2018
Number of Warrants [Abstract]                      
Warrants acquired (in shares)       712,823              
Issued (in shares)         17,414,030 6,125,339 0        
Exercised (in shares)         (1,144,999) [1] (250,000)          
Warrants outstanding (in shares)         16,981,854 19,898,859 0        
Weighted Average Exercise Price [Abstract]                      
Warrants acquired (in dollars per share)       $ 3.90              
Issued (in dollars per share)         $ 3.27            
Exercised (in dollars per share)         3.50            
Warrants outstanding (in dollars per share)         $ 3.23            
Warrants, exercise price (in dollars per share)               $ 4.25 $ 5.00    
Warrants conversion rate (in shares)         1.1           0.50
Number of warrants converted (in shares)         1,259,498         1,041,666  
Warrants outstanding, intrinsic value         $ 12.2 $ 0.3          
Exercise Price $5.00 [Member]                      
Number of Warrants [Abstract]                      
Issued (in shares) 937,500 11,000                  
Weighted Average Exercise Price [Abstract]                      
Warrants, exercisable period 24 months 24 months     24 months            
Warrants, exercise price (in dollars per share) $ 5.00 $ 5.00                  
Exercise price $1.82 [Member]                      
Number of Warrants [Abstract]                      
Issued (in shares) 6,500,000                    
Weighted Average Exercise Price [Abstract]                      
Warrants, exercisable period 24 months       24 months            
Warrants, exercise price (in dollars per share) $ 1.82                    
PIPE Transaction [Member]                      
Number of Warrants [Abstract]                      
Issued (in shares)       5,744,991              
Weighted Average Exercise Price [Abstract]                      
Exercised (in dollars per share)       $ 4.25              
Warrants, exercise price (in dollars per share)       $ 4.25              
Broker [Member]                      
Number of Warrants [Abstract]                      
Issued (in shares)       220,539              
Weighted Average Exercise Price [Abstract]                      
Exercised (in dollars per share)       $ 3.00              
Warrants, exercisable period       24 months 24 months            
Warrants, exercise price (in dollars per share)       $ 3.00              
Broker [Member] | PIPE Transaction [Member]                      
Number of Warrants [Abstract]                      
Issued (in shares)       220,539              
Advisor [Member] | Tranche One [Member]                      
Weighted Average Exercise Price [Abstract]                      
Warrants, exercisable period     12 months                
Advisor [Member] | Exercise Price $0.10 [Member]                      
Number of Warrants [Abstract]                      
Issued (in shares)     2,500,000                
Weighted Average Exercise Price [Abstract]                      
Exercised (in dollars per share)     $ 0.10                
Warrants, exercise price (in dollars per share)     $ 0.10                
Advisor [Member] | Exercise Price $0.10 [Member] | Tranche One [Member]                      
Weighted Average Exercise Price [Abstract]                      
Warrants, exercisable period         12 months            
Warrants exercisable (in shares)     1,250,000                
Advisor [Member] | Exercise Price $0.10 [Member] | Tranche Two [Member]                      
Weighted Average Exercise Price [Abstract]                      
Warrants, exercisable period         18 months            
Warrants exercisable (in shares)     1,250,000                
Advisor [Member] | Exercise Price $10.00 [Member]                      
Number of Warrants [Abstract]                      
Issued (in shares)     1,500,000                
Weighted Average Exercise Price [Abstract]                      
Exercised (in dollars per share)     $ 10.00                
Warrants, exercisable period         18 months            
Warrants exercisable (in shares)     1,500,000                
Warrants, exercise price (in dollars per share)     $ 10.00                
[1] Exercised warrants were converted at 1.1 shares per warrant for a total of 1,259,498 shares.