Note 13 - Commitments and Contingencies (Details Textual) - USD ($) |
12 Months Ended | ||||
|---|---|---|---|---|---|
Sep. 30, 2021 |
Mar. 31, 2022 |
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2018 |
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| Lessee, Operating Lease, Term of Contract (Year) | 3 years | ||||
| Accrued Rent | $ 42,000 | $ 21,000 | $ 42,000 | $ 39,600 | $ 38,400 |
| Operating Lease, Right-of-Use Asset | 0 | 39,000 | |||
| Operating Lease, Liability, Total | $ 0 | $ 39,000 | |||
| Patents [Member] | |||||
| Finite-Lived Intangible Asset, Useful Life (Year) | 20 years | ||||
| M I T Licensing Agreement [Member] | |||||
| Contractual Obligation, Total | $ 50,000 |
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for contractual rent under lease arrangements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. No definition available.
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| X | ||||||||||
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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| X | ||||||||||
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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