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Common Stock, Stock Options and Warrants (Tables) | 12 Months Ended
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Sep. 30, 2019
Stockholders' Equity Note [Abstract] |
Schedule of assumptions used in fair value of stock option grants |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Risk-free interest rate |  |  | 2.18 – 2.53 | % |  |  | 2.78 – 2.99 | % |  |  | 1.79 – 1.90 | %
Expected dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected term |  |  | 6.50 – 10 years |  |  |  | 6.50 – 10 years |  |  |  | 6.50 – 10 years |
Expected volatility |  |  | 119 – 121 | % |  |  | 116 | % |  |  | 85 – 108 | %
Schedule of stock option activity |
|  | Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term |  | Aggregate Intrinsic Value |
Outstanding at September 30, 2018 |  |  | 1,601,039 |  |  | $ | 4.35 |  |  |  |  |  |  |
Granted |  |  | 190,000 |  |  |  | 1.04 |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  |  |  |  |
Forfeited or expired |  |  | (20,000 | ) |  |  | 0.94 |  |  |  |  |  |  |
Outstanding at September 30, 2019 |  |  | 1,771,039 |  |  | $ | 4.03 |  |  | 7.75 years |  | $ | 49,465 |
Exercisable at September 30, 2019 |  |  | 1,174,019 |  |  | $ | 5.24 |  |  | 7.11 years |  | $ | 49,465 |
Schedule of warrants outstanding |
|  | Exercise price |  |  | Number |  |  | Expiration Dates
Investor Warrants |  | $ | 9.00 |  |  |  | 202,469 |  |  | March 19, 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 |  |  | 9.90 |  |  |  | 4,985 |  |  | January 8, 2020
LMB Warrants |  |  | 20.70 |  |  |  | 17,721 |  |  | November 3, 2019 – March 6, 2020
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 Agent Warrants |  |  | 5.87 |  |  |  | 89,625 |  |  | December 19, 2022
March 2018 Registered Direct/Private Placement Offering Investor Warrants |  |  | 2.86 |  |  |  | 669,504 |  |  | October 2, 2023
March 2018 Registered Direct/Private Placement Offering 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 |  |  |  | 3,430,421 |  |  | 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 |  |  |  | 7,821,230 |  |  | September 27, 2024
September 2019 Offering Pre-Funded Unit Warrants |  |  | 0.0001 |  |  |  | 1,060,615 |  |  | No expiration date
September 2019 Offering Underwriter Warrants |  |  | 1.12 |  |  |  | 547,486 |  |  | September 27, 2024
|  |  |  |  |  |  | 25,492,513 |  |  |
Schedule of common stock reserved for future issuances |
Stock plan options outstanding |  |  | 1,771,039 |
Stock plan shares available for future grants |  |  | 1,090,799 |
Warrants |  |  | 25,492,513 |
Unit purchase options |  |  | 201,334 |
Total |  |  | 28,555,685 |

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- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + 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=116856206&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=116856206&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=116856206&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=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: 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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