| Note 4 - Notes Payable (Details Textual) - USD ($) | 3 Months Ended | ||
|---|---|---|---|
| Dec. 31, 2018 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Short-term Debt, Total | $ 53,822 | $ 0 | |
| Financing Loan for Director and Officer Insurance Policy [Member] | |||
| Debt Instrument, Interest Rate, Stated Percentage | 4.40% | ||
| Short-term Debt, Total | $ 53,822 | $ 0 | |
| Loan for General Operating Expenses [Member] | |||
| Proceeds from Notes Payable, Total | $ 3,300 | 
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition The cash inflow from a borrowing supported by a written promise to pay an obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- 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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