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Common Stock, Stock Options and Warrants (Tables)
6 Months Ended
Mar. 31, 2021
Stockholders' Equity Note [Abstract]  
Schedule of stock option activity
   Option
Shares
   Weighted-
Average
Exercise
Price
   Weighted-
Average
Remaining
Contractual
Term
   Aggregate
Intrinsic
Value
 
Outstanding at October 1, 2020   3,390,171   $2.51   8.0 years   $440,336 
Granted   1,225,000    1.08          
Exercised                 
Forfeited or expired                 
Outstanding at March 31, 2021   4,615,171   $2.13   8.1 years   $2,659,010 
                    
Exercisable at March 31, 2021   1,968,804   $3.56   6.6 years   $787,968 
Schedule of warrants outstanding
   Exercise
price
   Number   Expiration Dates
Investor Warrants  $9.00    126,669   April 15, 2021 – April 25, 2021
LMB Warrants   7.50    53,110   March 24, 2022 – April 29, 2022
Financial Advisor Warrants   3.00    25,833   August 15, 2021
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    549,020   August 8, 2023
April 2019 Registered Direct/Private Placement Offering Investors   1.42    1,294,498   April 5, 2021
April 2019 Registered Direct/Private Placement Offering Placement Agent   1.93    240,130   April 5, 2021
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    143,295   August 19, 2025
May 2020 Registered Direct Offering Investors   1.00    2,400,000   November 18, 2025
May 2020 Registered Direct Offering Placement Agent   1.33    494,118   May 14, 2025
August 2020 Underwriter   1.31    641,166   August 10, 2025
January 2021 Registered Direct Offering Investors   1.23    6,182,384   July 27, 2026
January 2021 Registered Direct Offering Agent   1.62    1,081,917   July 27, 2026
February 2021 Offering Investors   1.70    25,044,164   February 19, 2026
February 2021 Offering Agent   1.88    3,558,140   February 19, 2026
         51,569,059    
Summary of common stock reserved for future issuances
Stock plan options outstanding   4,615,171 
Stock plan shares available for future grants   1,240,000 
Warrants outstanding   51,569,059 
Total   57,424,230