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Common Stock, Stock Options and Warrants (Tables)
9 Months Ended
Jun. 30, 2020
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, 2019   1,771,039   $4.03         
Granted   1,000,799    0.68         
Exercised                
Forfeited or expired   (6,667)   9.00         
Outstanding at June 30, 2020   2,765,171   $2.80   7.9 years  $547,433 
Exercisable at June 30, 2020   1,293,260   $4.90   6.6 years  $83,540 
Schedule of warrants outstanding

   Exercise
price
   Number   Expiration Dates
Investor Warrants  $9.00    59,446   July 2, 2020 – September 14, 2020
Investor Warrants   9.00    307,778   November 5, 2020 – April 25, 2021
LMB Warrants   6.15    38,771   November 20, 2020 – March 2, 2021
LMB Warrants   7.50    73,883   August 18, 2020 – March 14, 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 Warrants   4.13    1,622,989   August 2, 2022
2017 Public Offering Underwriter Warrants   4.54    65,940   February 2, 2023
December 2017 Registered Direct/Private Placement Offering Investor Warrants   4.63    640,180   June 19, 2023
December 2017 Registered Direct/Private Placement Offering Placement Agent Warrants   5.87    89,625   December 19, 2022
March 2018 Registered Direct/Private Placement Offering Investor Warrants   2.86    218,972   October 2, 2023
March 2018 Registered Direct/Private Placement Offering Placement Agent Warrants   3.73    46,866   March 28, 2023
August 2018 Offering Investor Warrants   1.15    7,843,138   August 14, 2023
August 2018 Offering Agent Warrants   1.59    549,020   August 8, 2023
April 2019 Registered Direct/Private Placement Offering Investor Warrants   1.42    1,294,498   April 5, 2021
April 2019 Registered Direct/Private Placement Offering Placement Agent Warrants   1.93    240,130   April 5, 2021
September 2019 Offering Investor Warrants   0.77    2,793,297   September 27, 2024
September 2019 Offering Underwriter Warrants   1.12    547,486   September 27, 2024
February 2020 Exercise Agreement Warrants   1.02    6,298,673   August 19, 2025
February 2020 Exercise Agreement Placement Agent Warrants   1.28    440,907   August 19, 2025
May 2020 Registered Direct Offering Investor Warrants   1.00    2,400,000   November 18, 2025
May 2020 Registered Direct Offering Placement Agent Warrants   1.33    494,118   May 14, 2025
         26,285,479  
Summary of common stock reserved for future issuances

Stock plan options outstanding   2,765,171 
Stock plan shares available for future grants   3,090,000 
Warrants outstanding   26,285,479 
Total   32,140,650