Note 5 - Insurance Premium Financing (Details Textual) - Insurance Premium Financing [Member] - USD ($)  | 
Jul. 31, 2022  | 
Sep. 30, 2022  | 
Sep. 30, 2021  | 
|---|---|---|---|
| Debt Instrument, Face Amount | $ 354,000 | ||
| Debt Instrument, Interest Rate, Stated Percentage | 2.99% | ||
| Debt Instrument, Periodic Payment, Total | $ 35,000 | ||
| Short-Term Debt, Total | $ 247,933 | $ 0 | 
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- Definition Amount of the required periodic payments including both interest and principal payments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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| X | ||||||||||
- Details 
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