Quarterly report pursuant to Section 13 or 15(d)

Offerings of Common Stock and Warrants - Warrants - General Information (Details)

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Offerings of Common Stock and Warrants - Warrants - General Information (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Oct. 01, 2020
USD ($)
$ / shares
shares
Jun. 16, 2020
USD ($)
$ / shares
Dec. 09, 2019
USD ($)
$ / shares
Oct. 24, 2019
$ / shares
shares
Sep. 04, 2019
$ / shares
shares
Feb. 04, 2019
USD ($)
$ / shares
shares
Jan. 31, 2021
item
$ / shares
shares
Sep. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
shares
Apr. 30, 2016
$ / shares
Warrants                      
Deemed dividend | $               $ 15,000 $ 15,000    
Series A Common Stock Warrants                      
Warrants                      
Outstanding warrants (in shares)                   217,875  
Maturity date                   Oct. 25, 2021  
Series A Common Stock Warrants, Expiring 25 October 2021                      
Warrants                      
Exercise price (in dollars per share) | $ / shares                     $ 25.50
Goldman Warrant, Purchase Warrant for Common Shares                      
Warrants                      
Issued warrants (in shares)           1          
Exercise price (in dollars per share) | $ / shares   $ 2.61 $ 3.80     $ 8.86          
Aggregate shares called by warrants (in shares)           404,634       463,067  
Aggregate shares called by each warrant (in shares)           404,634          
Purchase price of warrants | $           $ 150,000          
Date from which warrants exercisable           Aug. 04, 2019          
Maturity date           Feb. 04, 2024          
Expected proceeds from warrants | $   $ 1,186,313                  
Amortization of debt discount (additional debt discount) | $   $ (100,000) $ (300,000)                
Value of warrants | $                   $ 2,300,000  
Goldman 2020 Warrant, Purchase Warrant for Common Shares                      
Warrants                      
Issued warrants (in shares) 1                    
Exercise price (in dollars per share) | $ / shares $ 4.76                    
Aggregate shares called by warrants (in shares) 291,295                    
Aggregate shares called by each warrant (in shares) 291,295                    
Date from which warrants exercisable Oct. 01, 2020                    
Maturity date Feb. 04, 2024                    
Private placement, purchase price | $ $ 10,000                    
Value of warrants | $ $ 800,000                    
September 2019 Pre-Funded Common Stock Warrants                      
Warrants                      
Exercise price (in dollars per share) | $ / shares       $ 0.001              
Aggregate shares called by warrants (in shares)         440,000            
Purchase price per warrant (in dollars per share) | $ / shares         $ 5.00            
Warrants exercised (in shares)       440,000              
September 2019 Series D Common Stock Warrants                      
Warrants                      
Outstanding warrants (in shares)                   75,000  
Exercise price (in dollars per share) | $ / shares         $ 6.12   $ 6.12        
Aggregate shares called by warrants (in shares)         765,000            
Term         5 years            
Date from which warrants exercisable         Apr. 02, 2020            
Maturity date         Apr. 02, 2025            
Shares as percentage of Registered Direct Offering (as a percent)         75.00%            
Number of warrant holders | item             3        
Warrants exercised (in shares)             690,000        
Warrants exercised, shares issued (in shares)             352,279