v3.26.1
Note 6 - Line of Credit Arrangement (Details Textual) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2025
Dec. 31, 2021
Dec. 31, 2020
Investment, Variable Interest Rate, Type [Extensible Enumeration]       Prime Rate [Member]    
Long-Term Line of Credit, Total   $ 348,843   $ 348,843    
First Republic Bank [Member] | Line of Credit [Member]            
Line of Credit Facility, Maximum Borrowing Capacity       $ 350,000    
Debt Instrument, Basis Spread on Variable Rate 4.50%          
Debt Instrument, Interest Rate, Effective Percentage         7.75%  
Debt Instrument, Interest Rate, Stated Percentage           7.75%
Long-Term Line of Credit, Total   348,843 $ 348,843      
Interest Expense, Debt   $ 26,295 $ 32,172