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

Warrant derivative liability - Private placement (Q3) (Details)

v3.20.4
Warrant derivative liability - Private placement (Q3) (Details) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Jan. 08, 2019
Dec. 12, 2018
Dec. 31, 2018
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2020
Jun. 30, 2020
Jun. 24, 2020
Jun. 23, 2020
Jun. 01, 2020
Mar. 17, 2020
Nov. 30, 2018
Warrants and Rights Note Disclosure [Abstract]                        
Units issued in private placement offering (in shares)   1,425,641                    
Number of warrants included in each unit (in shares)   1                    
Number of shares issuable per warrant (in shares)   0.50     1.1              
Unit price (in dollars per share)   $ 1.95                    
Proceeds from offering   $ 2.8                    
Share issuance costs   0.1                    
Net proceeds from private placement offering $ 0.1 $ 2.7 $ 2.6                  
Shares issued pursuant to a private placement - net proceeds (in shares) 25,641   1,400,000                  
Warrants, exercise price (in dollars per share)               $ 4.25 $ 5.00      
Derivative liability         $ 1.1 $ 0.2            
Shares issuable upon exercise of warrants (in shares)         1,259,498         1,041,666    
December 2018 Warrants                        
Warrants and Rights Note Disclosure [Abstract]                        
Number of shares issuable per warrant (in shares)           570,258 1,990,624       1,003,232  
Term of warrants   2 years                    
Warrants, exercise price (in dollars per share)   $ 3.90       $ 0.65 $ 0.75       $ 1.62  
Common Stock                        
Warrants and Rights Note Disclosure [Abstract]                        
Number of shares of stock included in each unit (in shares)   1                    
Number of shares issuable per warrant (in shares)   1                   1
Net proceeds from private placement offering $ 0.1   $ 2.6                  
Shares issued pursuant to a private placement - net proceeds (in shares) 25,641   1,400,000 308,642 0              
Shares issuable upon exercise of warrants (in shares)         712,823 4,276,937