Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Warrants issued and outstanding (Details)

v3.21.4
Stockholders' Equity - Warrants issued and outstanding (Details) - $ / shares
 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Warrants [Roll Forward]    
Exercise price of warrants (in dollars per share) $ 6.50 $ 8.73
Warrants, Outstanding at the beginning of the period 820,939 728,439
Warrants, Issued 75,000 105,000
Warrants, Expired   (12,500)
Warrants, Outstanding at the end of the period 895,939 820,939
Warrants, Exercisable at the end of the period 820,939  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition1 6 months  
Weighted average exercise price, Outstanding at the beginning of the period $ 19.44 $ 20.99
Weighted average exercise price, Issued 6.50 8.73
Weighted average exercise price, Expired   20.00
Weighted average exercise price, Outstanding at the end of the period 18.35 $ 19.44
Weighted average exercise price, Exercisable at the end of the period $ 19.44  
Weighted average remaining contractual term, Outstanding at the end of the period 10 months 24 days  
Weighted average remaining contractual term, Exercisable at the end of the period 10 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  
September 20, 2024    
Warrants [Roll Forward]    
Exercise price of warrants (in dollars per share) $ 6.50  
Warrants, Outstanding at the end of the period 75,000