Note 7 - Derivative Liabilities - Fair Value Measurements (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($) |
12 Months Ended | |
---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Series F Warrants Relating To 2017 Securities Purchase Agreement [Member] | ||
Beginning balance at September 30, 2020 | $ 1,000,000 | $ 1,000,000 |
Adjustments to estimated fair value | 0 | 0 |
Ending balance at September 30, 2021 | 1,000,000 | 1,000,000 |
Series G Warrants Relating To 2018 Securities Purchase Agreement [Member] | ||
Beginning balance at September 30, 2020 | 748,275 | 748,275 |
Adjustments to estimated fair value | 0 | |
Ending balance at September 30, 2021 | 748,275 | 748,275 |
Series H Warrants Relating To 2019 Securities Purchase Agreement [Member] | ||
Beginning balance at September 30, 2020 | 568,144 | 1,247,415 |
Adjustments to estimated fair value | (108,944) | (679,271) |
Ending balance at September 30, 2021 | $ 459,200 | $ 568,144 |
X | ||||||||||
- Definition The fair value of derivative liabilities in excess of proceeds. No definition available.
|
X | ||||||||||
- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|