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Common Stock, Stock Options and Warrants (Tables)
12 Months Ended
Sep. 30, 2021
Stockholders' Equity Note [Abstract]  
Schedule of option activity under the plans
    2021    2020   
Risk-free interest rate   0.32 – 0.89%   0.26 – 1.66%  
Expected dividend yield   0.00%   0.00%  
Expected term   6.50 – 10 years   6.50 – 10 years  
Expected volatility   111 – 112%   107 – 117%  

 

Schedule of option activity under the plans
    Shares     Weighted-
Average
Exercise
Price
    Weighted-
Average
Remaining
Contractual
Term
    Aggregate
Intrinsic
Value
 
Outstanding at September 30, 2020     3,390,171     $ 2.51     8.00 years     $ 440,336  
Granted     2,435,000       1.57                
Exercised     (70,000 )     1.18            $ 101,866   
Forfeited or expired           9.0                
Outstanding at September 30, 2021     5,755,171     $ 2.13     8.02 years     $ 3,589,392  
Exercisable at September 30, 2021     2,499,635     $ 3.10     6.56 years     $ 1,429,358  

 

Schedule of warrants outstanding
   Exercise
price
   Number   Expiration Dates
LMB Warrants  $7.50    53,110   March 24 – April 29, 2022
2016 Offering Warrants   4.13    140,819   November 23, 2021 – February 27, 2022
2017 Public Offering Investors   4.13    1,622,989   August 2, 2022
2017 Public Offering Underwriter   4.54    65,940   February 2, 2023
December 2017 Registered Direct/Private Placement Offering Investors   4.63    640,180   June 19, 2023
December 2017 Registered Direct/Private Placement Offering Placement Agent   5.87    89,625   December 19, 2022
March 2018 Registered Direct/Private Placement Offering Investors   2.86    218,972   October 2, 2023
March 2018 Registered Direct/Private Placement Offering Placement Agent   3.73    46,866   March 28, 2023
August 2018 Offering Investors   1.15    3,921,569   August 14, 2023
August 2018 Offering Agent   1.59    189,412   August 8, 2023
April 2019 Registered Direct/Private Placement Offering Investors   1.42    1,294,498   April 5, 2024
April 2019 Registered Direct/Private Placement Offering Placement Agent   1.93    240,130   April 5, 2024
September 2019 Offering Investors   0.77    2,793,297   September 27, 2024
September 2019 Offering Underwriter   1.12    194,358   September 27, 2024
February 2020 Exercise Agreement Placement Agent   1.28    138,886   August 19, 2025
May 2020 Registered Direct Offering Investors   1.00    1,670,588   November 18, 2025
May 2020 Registered Direct Offering Placement Agent   1.33    155,647   May 14, 2025
August 2020 Underwriter   1.31    201,967   August 10, 2025
January 2021 Registered Direct Offering Investors   1.23    3,091,192   July 27, 2026
January 2021 Registered Direct Offering Agent   1.62    351,623   July 27, 2026
February 2021 Offering Investors   1.70    20,580,283   February 19, 2026
February 2021 Offering Agent   1.88    2,506,396   February 19, 2026
         40,208,347    

 

Summary of common stock reserved for future issuances
Stock plan options outstanding   5,755,171 
Stock plan shares available for future grants   7,530,000 
Warrants outstanding   40,208,347 
Total   53,493,518