Quarterly report [Sections 13 or 15(d)]

Note 15 - Sale of ENTADFI (Details Textual)

v3.25.4
Note 15 - Sale of ENTADFI (Details Textual) - USD ($)
 3 Months Ended
Sep. 22, 2025
Apr. 19, 2023
Dec. 31, 2025
Dec. 31, 2024
Proceeds from Sale of Productive Assets     $ 0 $ 695,216
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal     $ 0 695,216
ONCO Series D Preferred Stock [Member]        
Investment Owned, Balance, Shares (in shares) 3,125      
ONCO Warrant [Member]        
Investment Owned, Balance, Shares (in shares) 846,975      
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       $ 700,000