Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Warrants issued and outstanding (Details)

v3.20.4
Stockholders' Equity - Warrants issued and outstanding (Details) - $ / shares
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Warrants [Roll Forward]    
Warrants, Outstanding at the beginning of the period 820,939  
Warrants, Outstanding at the end of the period 820,939 820,939
Warrants, Exercisable at the end of the period 803,439  
Weighted average exercise price, Outstanding at the beginning of the period $ 19.44  
Weighted average exercise price, Outstanding at the end of the period 19.44 $ 19.44
Weighted average exercise price, Exercisable at the end of the period $ 19.67  
Weighted average remaining contractual term, Outstanding at the end of the period 1 year 4 months 24 days 1 year 8 months 12 days
Weighted average remaining contractual term, Exercisable at the end of the period 1 year 4 months 24 days  
December 13, 2021    
Warrants [Roll Forward]    
Exercise price of warrants (in dollars per share) $ 55.00  
Warrants, Outstanding at the end of the period 20,627  
April 10, 2022    
Warrants [Roll Forward]    
Exercise price of warrants (in dollars per share) $ 20.00  
Warrants, Outstanding at the end of the period 695,312  
July 6, 2023    
Warrants [Roll Forward]    
Exercise price of warrants (in dollars per share) $ 8.73  
Warrants, Outstanding at the end of the period 105,000