Quarterly report [Sections 13 or 15(d)]

Note 15 - Sale of ENTADFI (Details Textual)

v3.26.1
Note 15 - Sale of ENTADFI (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Apr. 01, 2026
Sep. 22, 2025
Apr. 19, 2023
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Sep. 30, 2025
Proceeds from Sale of Productive Assets           $ 0 $ 1,669,519  
Proceeds from Sale of Equity Securities, FV-NI           3,168,910 393,217  
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal       $ 0 $ 974,303 $ 0 $ 1,669,519  
ONCO Series D Preferred Stock [Member]                
Investment Owned, Balance, Shares (in shares)   3,125            
ONCO Warrant [Member]                
Investment Owned, Balance, Shares (in shares)   169,395            
ONCO Warrant [Member] | ONCO [Member]                
Investment Owned, Balance, Shares (in shares)   872,565   169,395   169,395   169,395
Common Stock [Member] | ONCO [Member]                
Investment Owned, Balance, Shares (in shares)       770,772 28,549 770,772 28,549  
Proceeds from Sale of Equity Securities, FV-NI       $ 3,200,000 $ 400,000      
Common Stock [Member] | ONCO [Member] | Subsequent Event [Member]                
Investment Owned, Balance, Shares (in shares) 1,042,062              
Proceeds from Sale of Equity Securities, FV-NI $ 1,800,000              
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           $ 1,700,000