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Common Stock, Stock Options and Warrants (Tables)

12 Months Ended

Sep. 30, 2022

Stockholders' Equity Note [Abstract]

Schedule of fair value of stock option grants

		2022		2021
Risk-free interest rate		1.05 – 2.94%		0.32 – 0.89%
Expected dividend yield		0.00%		0.00%
Expected term		6.50 – 10 years		6.50 – 10 years
Expected volatility		94 – 110%		111 – 112%

Schedule of option activity under the plans

		Shares				Weighted- Average Exercise Price				Weighted- Average Remaining Contractual Term				Aggregate Intrinsic Value
Outstanding at September 30, 2021			5,755,171			$	2.13				8.02 years			$	3,589,392
Granted			3,645,000				1.97
Outstanding at September 30, 2022			9,400,171			$	2.07				7.81 years			$	869,509
Exercisable at September 30, 2022			4,140,116			$	2.42				6.58 years			$	595,405

Schedule of warrants outstanding

		Exercise price				Number				Expiration Dates
December 2017 Registered Direct/Private Placement Investors		$	4.63				640,180			June 19, 2023
December 2017 Registered Direct/Private Placement Agent			5.87				89,625			December 19, 2022
March 2018 Registered Direct/Private Placement Investors			2.86				218,972			October 2, 2023
March 2018 Registered Direct/Private 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 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 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
							38,325,489

Schedule of common stock reserved for future issuances

Stock plan options outstanding			9,400,171
Stock plan shares available for future grants			3,885,000
Warrants outstanding			38,325,489
Total			51,610,660

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Summary of common stock reserved for future issuances.

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Tabular disclosure of option activity under the plans.

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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.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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.

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