Quarterly report [Sections 13 or 15(d)]

Note 15 - Sale of ENTADFI Assets (Details Textual)

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Note 15 - Sale of ENTADFI Assets (Details Textual) - USD ($)
 3 Months Ended 9 Months Ended 10 Months Ended
Sep. 22, 2025
Apr. 19, 2023
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Proceeds from Sale of Productive Assets         $ 0 $ 2,154,134  
Proceeds from Sale of Equity Securities, FV-NI         4,971,386 393,217  
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal     $ 0 $ 484,615 $ 0 $ 2,154,134  
ONCO Series D Preferred Stock [Member]              
Investment Owned, Balance, Shares (in shares) 3,125            
ONCO Warrant [Member]              
Investment Owned, Balance, Shares (in shares) 3,216,344            
ONCO Warrant [Member] | ONCO [Member]              
Investment Owned, Balance, Shares (in shares) 87,256   3,216,344   3,216,344   3,216,344
Common Stock [Member] | ONCO [Member]              
Investment Owned, Balance, Shares (in shares)     104,206 2,854 104,206 2,854 104,206
Proceeds from Sale of Equity Securities, FV-NI     $ 1,800,000   $ 5,000,000 $ 400,000 $ 5,000,000
ONCO Promissory Notes [Member]              
Financing Receivable, after Allowance for Credit Loss $ 8,800,000            
Proceeds from Collection of Notes Receivable $ 6,300,000            
ENTADFI [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Asset Purchase Agreement [Member]              
Disposal Group, Including Discontinued Operation, Consideration   $ 20,000,000          
Proceeds from Sale of Productive Assets   6,000,000          
ENTADFI [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Asset Purchase Agreement [Member] | Promissory Notes Receivable, Due September 30, 2023 [Member]              
Disposal Group, Including Discontinued Operation, Consideration   4,000,000          
ENTADFI [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Asset Purchase Agreement [Member] | Promissory Notes Receivable, Due April 19, 2024 [Member]              
Disposal Group, Including Discontinued Operation, Consideration   5,000,000          
ENTADFI [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Asset Purchase Agreement [Member] | Promissory Notes Receivable, Due September 30, 2024 [Member]              
Disposal Group, Including Discontinued Operation, Consideration   5,000,000          
ENTADFI [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Asset Purchase Agreement [Member] | Milestone Receivable [Member]              
Disposal Group, Including Discontinued Operation, Consideration   $ 80,000,000          
ENTADFI [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Asset Purchase Agreement, Amendment [Member]              
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal           $ 2,200,000