Note 7 - Derivative Liabilities (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2023 |
Jun. 30, 2022 |
Jun. 30, 2023 |
Jun. 30, 2022 |
Jun. 30, 2023 |
Jun. 30, 2022 |
Sep. 30, 2022 |
Sep. 30, 2021 |
May 12, 2019 |
Jun. 28, 2018 |
Jun. 22, 2017 |
|
| Unrealized Gain (Loss) on Derivatives | $ 0 | $ 0 | $ (0) | $ 1,000,000 | $ 0 | $ 1,000,000 | $ 1,000,000 | $ 108,944 | |||
| Derivative Warrant Liability [Member] | |||||||||||
| Derivative Liability | $ 1,628,113 | $ 1,628,113 | |||||||||
| Fair Value Adjustment of Derivatives | $ 0 | $ 1,000,000 | $ 108,944 | ||||||||
| Series F Warrant [Member] | |||||||||||
| Class of Warrants and Rights, Required Cash Purchase Price (in dollars per share) | $ 288.00 | $ 288.00 | |||||||||
| Unrealized Gain (Loss) on Derivatives | $ 1,000,000 | ||||||||||
| Series G Warrant [Member] | |||||||||||
| Class of Warrants and Rights, Required Cash Purchase Price (in dollars per share) | $ 176.00 | $ 176.00 | |||||||||
| Series H Warrant [Member] | |||||||||||
| Class of Warrants and Rights, Required Cash Purchase Price (in dollars per share) | $ 85.28 | $ 85.28 | |||||||||
| X | ||||||||||
- Definition The potentially required cash purchase price for warrants or rights. No definition available.
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| X | ||||||||||
- Definition Amount of expense (income) related to adjustment to fair value of derivatives. No definition available.
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| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
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| X | ||||||||||
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| X | ||||||||||
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