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Note 2 - Marketable Securities and Investment Other Securities - Assets Valued at Fair Value (Details) - USD ($)
12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Fair Value, Inputs, Level 1 [Member]    
Balance $ 0 $ 0
Change in value of equities   0
Additional Investment   0
Balance 0 0
Fair Value, Inputs, Level 1 [Member] | Contingent Liability [Member]    
Change in value of liabilities 0 0
Fair Value, Inputs, Level 1 [Member] | Convertible Notes [Member]    
Change in value of liabilities  
Fair Value, Inputs, Level 2 [Member]    
Balance 0 0
Change in value of equities   0
Additional Investment   0
Balance 0 0
Fair Value, Inputs, Level 2 [Member] | Contingent Liability [Member]    
Change in value of liabilities 0 0
Fair Value, Inputs, Level 2 [Member] | Convertible Notes [Member]    
Change in value of liabilities  
Fair Value, Inputs, Level 3 [Member]    
Balance (90,362) (276,000)
Change in value of equities   0
Additional Investment   185,638
Balance 1,171,308 (90,362)
Fair Value, Inputs, Level 3 [Member] | Contingent Liability [Member]    
Change in value of liabilities 90,362 $ 0
Fair Value, Inputs, Level 3 [Member] | Convertible Notes [Member]    
Change in value of liabilities $ 1,171,308