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Common Stock, Stock Options and Warrants (Tables) | 12 Months Ended
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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 |

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- Definition Tabular disclosure of option activity under the plans. + References No definition available. + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 + Details
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