Annual report pursuant to Section 13 and 15(d)

Note 3 - Fair Value Measurements (Details Textual)

v3.24.4
Note 3 - Fair Value Measurements (Details Textual)
1 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
Oct. 03, 2024
yr
Sep. 24, 2024
shares
Jun. 30, 2024
shares
Oct. 03, 2023
USD ($)
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)     $ 0 $ 3,900,000        
Equity Securities, FV-NI, Unrealized Gain (Loss)     $ (176,077) 0        
Fair Value, Inputs, Level 3 [Member] | BWV Preferred Stock [Member] | Measurement Input, Price Volatility [Member]                
Equity Securities, FV-NI, Measurement Input         0.79      
Fair Value, Inputs, Level 3 [Member] | BWV Preferred Stock [Member] | Measurement Input, Expected Term [Member]                
Equity Securities, FV-NI, Measurement Input | yr         3      
Fair Value, Inputs, Level 3 [Member] | BWV Preferred Stock [Member] | Measurement Input, Discount Rate [Member]                
Equity Securities, FV-NI, Measurement Input         0.35      
Fair Value, Inputs, Level 3 [Member] | BWV Preferred Stock [Member] | Measurement Input, Discount for Lack of Marketability [Member]                
Equity Securities, FV-NI, Measurement Input         0.15      
Fair Value, Inputs, Level 3 [Member] | BWV Preferred Stock [Member] | Measurement Input, Probability Of Dissolution [Member[                
Equity Securities, FV-NI, Measurement Input         0.60      
Common Stock [Member]                
Investment Owned, Balance, Shares (in shares) | shares     142,749     142,749    
Investment Owned, Balance, Principal Amount     $ 700,000          
Equity Securities, FV-NI, Unrealized Gain (Loss)     (200,000)          
Common Stock [Member] | Subsequent Event [Member]                
Proceeds from Sale of Equity Securities, FV-NI $ 400,000              
Series A Convertible Preferred Stock [Member]                
Investment Owned, Balance, Shares (in shares) | shares             3,000  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value               $ 900,000
In Process Research and Development [Member]                
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)   $ 3,900,000 $ 3,900,000 $ 3,900,000