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

Stockholders' deficit - Warrants (Q3) (Details)

v3.20.4
Stockholders' deficit - Warrants (Q3) (Details)
$ / shares in Units, $ in Millions
 8 Months Ended 9 Months Ended 12 Months Ended
Jun. 24, 2020
USD ($)
Director
$ / shares
shares
Dec. 19, 2019
$ / shares
shares
Nov. 04, 2019
USD ($)
$ / shares
shares
Sep. 17, 2019
$ / shares
shares
May 06, 2019
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
shares
Dec. 31, 2018
shares
Jul. 20, 2020
Director
$ / shares
shares
Jun. 23, 2020
$ / shares
Jun. 01, 2020
shares
Mar. 17, 2020
shares
Dec. 12, 2018
shares
Nov. 30, 2018
shares
Warrants [Abstract]                            
Warrants acquired (in shares)         712,823                  
Warrants acquired (in dollars per share) | $ / shares         $ 3.90                  
Warrants issued (in shares)           17,414,030 6,125,339 0            
Warrants, exercise price (in dollars per share) | $ / shares $ 4.25                 $ 5.00        
Shares issuable upon exercise of warrants (in shares)           1,259,498         1,041,666      
Number of shares issuable per warrant (in shares)           1.1             0.50  
Warrants outstanding, intrinsic value | $           $ 12.2 $ 0.3              
November 2019 Notes                            
Warrants [Abstract]                            
Increase in fair value of warrants (less than) | $     $ 0.1                      
General and administrative expense                            
Warrants [Abstract]                            
Contract termination expense | $             $ 5.7              
General and administrative expense | November 2019 Notes                            
Warrants [Abstract]                            
Increase in fair value of warrants (less than) | $ $ 0.2                          
Warrant                            
Warrants [Abstract]                            
Warrants, exercise price (in dollars per share) | $ / shares $ 1.25         $ 3.90                
Term of warrants 84 months         2 years                
Shares issuable upon exercise of warrants (in shares) 1,000,000                          
Number of shares issuable per warrant (in shares)             2,560,883         1,003,232 0.5 0.5
Number of non-employee directors | Director 2                          
June 2020 Warrants                            
Warrants [Abstract]                            
Warrants, exercise price (in dollars per share) | $ / shares $ 1.25                          
Term of warrants 84 months                          
Shares issuable upon exercise of warrants (in shares) 1,000,000                          
July 2020 Warrants                            
Warrants [Abstract]                            
Term of warrants 84 months                          
July 2020 Guarantor Warrants                            
Warrants [Abstract]                            
Warrants, exercise price (in dollars per share) | $ / shares                 $ 1.05          
Shares issuable upon exercise of warrants (in shares)                 300,000          
July 2020 Director Warrants                            
Warrants [Abstract]                            
Warrants, exercise price (in dollars per share) | $ / shares                 $ 1.05          
Shares issuable upon exercise of warrants (in shares)                 200,000          
Number of non-employee directors | Director                 2          
Exercise Price $5.00                            
Warrants [Abstract]                            
Warrants issued (in shares)   937,500 11,000                      
Warrants, exercise price (in dollars per share) | $ / shares   $ 5.00 $ 5.00                      
Term of warrants   24 months 24 months     24 months                
Exercise price $1.82                            
Warrants [Abstract]                            
Warrants issued (in shares)   6,500,000                        
Warrants, exercise price (in dollars per share) | $ / shares   $ 1.82                        
Term of warrants   24 months       24 months                
PIPE Transaction                            
Warrants [Abstract]                            
Warrants issued (in shares)         5,744,991                  
Warrants, exercise price (in dollars per share) | $ / shares         $ 4.25                  
Broker                            
Warrants [Abstract]                            
Warrants issued (in shares)         220,539                  
Warrants, exercise price (in dollars per share) | $ / shares         $ 3.00                  
Term of warrants         24 months 24 months                
Broker | PIPE Transaction                            
Warrants [Abstract]                            
Warrants issued (in shares)         220,539                  
Advisor | Share-based Payment Arrangement, Tranche One                            
Warrants [Abstract]                            
Term of warrants       12 months                    
Advisor | Share-based Payment Arrangement, Tranche Three                            
Warrants [Abstract]                            
Term of warrants       18 months                    
Advisor | Exercise Price $0.10                            
Warrants [Abstract]                            
Warrants issued (in shares)       2,500,000                    
Warrants, exercise price (in dollars per share) | $ / shares       $ 0.10                    
Advisor | Exercise Price $0.10 | Share-based Payment Arrangement, Tranche One                            
Warrants [Abstract]                            
Term of warrants           12 months                
Warrants exercisable (in shares)       1,250,000                    
Advisor | Exercise Price $0.10 | Share-based Payment Arrangement, Tranche Two                            
Warrants [Abstract]                            
Term of warrants           18 months                
Warrants exercisable (in shares)       1,250,000                    
Advisor | Exercise Price $10.00                            
Warrants [Abstract]                            
Warrants issued (in shares)       1,500,000                    
Warrants, exercise price (in dollars per share) | $ / shares       $ 10.00                    
Term of warrants           18 months                
Warrants exercisable (in shares)       1,500,000                    
Advisor | Exercise Price $10.00 | Share-based Payment Arrangement, Tranche Three                            
Warrants [Abstract]                            
Warrants exercisable (in shares)       1,500,000