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Common Stock, Stock Options and Warrants (Tables)
6 Months Ended
Mar. 31, 2023
Common Stock, Stock Options and Warrants [Abstract]  
Schedule of summary of option activity under our stock option plans
   Option
Shares
   Weighted-
Average
Exercise
Price
   Weighted-
Average
Remaining
Contractual
Term
  Aggregate
Intrinsic
Value
 
Outstanding at October 1, 2022   9,400,171   $2.07   7.81 years  $869,509 
Granted   4,075,000    1.26         
Exercised   (46,667)   0.67       34,067 
Forfeited or expired   
    
         
Outstanding at March 31, 2023   13,428,504   $1.83   7.99 years  $750,721 
                   
Exercisable at March 31, 2023   6,179,962   $2.17   6.76 years  $688,121 

 

Schedule of reserved shares of common stock for the exercise of outstanding warrants
   Exercise
price
   Number   Expiration Date
December 2017 Registered Direct/Private Placement Investors  $4.63    640,180   June 19, 2023
March 2018 Registered Direct/Private Placement Investors   2.86    218,972   October 2, 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 Investors   1.42    1,294,498   April 5, 2024
April 2019 Registered Direct/Private 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 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 Agent   1.33    155,647   May 14, 2025
August 2020 Underwriter   1.31    201,967   August 10, 2025
January 2021 Private Placement Investors   1.23    3,091,192   July 27, 2026
January 2021 Private Placement 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
         38,188,998    

 

Schedule of summary of common stock reserved for future issuances
Stock plan options outstanding   13,428,504 
Stock plan shares available for future grants   11,810,000 
Warrants outstanding   38,188,998 
Total   63,427,502