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Note 4 - Convertible Notes Payable (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Mar. 08, 2024
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Debt Conversion, Original Debt, Amount       $ 400,000 $ 0
Stock Issued During Period, Value, Conversion of Convertible Securities   $ 400,000      
Stock Issued During Period, Shares, Conversion of Convertible Securities (in shares)       223,463  
Conversion Of Convertible Notes Into Common Stock [Member]          
Debt Conversion, Original Debt, Amount   $ 400,000   $ 400,000  
Debt Conversion, Converted Instrument, Shares Issued (in shares)   223,463      
Related Party [Member]          
Interest Expense, Nonoperating   $ 52,469 $ (0) $ 63,288 $ (0)
Senior Secured 2024 Notes [Member]          
Debt Instrument, Face Amount $ 6,000,000        
Debt Instrument, Interest Rate, Stated Percentage 8.00% 8.00%   8.00%  
Debt Instrument, Convertible, Conversion Price (in dollars per share) $ 1.79        
Debt Issuance Costs, Gross $ 176,000        
Debt Instrument, Term (Year) 3 years        
Interest Payment   $ 34,844   $ 34,844  
Interest Expense, Nonoperating   23,591   26,716  
Debt Issuance Costs, Net   26,716   $ 26,716  
Stock Issued During Period, Value, Conversion of Convertible Securities   $ 400,000      
Stock Issued During Period, Shares, Conversion of Convertible Securities (in shares)   223,463   223.463  
Senior Secured 2024 Notes [Member] | Maximum [Member]          
Debt Instrument, Interest Rate, Stated Percentage 8.00%        
Senior Secured 2024 Notes [Member] | Related Party [Member]          
Debt Instrument, Face Amount $ 2,000,000 $ 2,000,000   $ 2,000,000  
Interest Payable   32,000   32,000  
Senior Secured 2024 Notes [Member] | Third Party [Member]          
Debt Instrument, Face Amount   4,000,000   4,000,000  
Interest Payable   80,000   80,000  
The Francisco Trust [Member]          
Debt Instrument, Face Amount   $ 1,000,000   $ 1,000,000  
Debt Instrument, Interest Rate, Stated Percentage   8.00%   8.00%  
The Francisco Trust [Member] | Mr. Thomas Emalfarb [Member]          
Interest Payable   $ 20,000   $ 20,000  
Irrevocable Trust [Member] | Bradley Emalfarb [Member]          
Debt Instrument, Face Amount   $ 500,000   $ 500,000  
Debt Instrument, Interest Rate, Stated Percentage   8.00%   8.00%  
Interest Payable   $ 2,000   $ 2,000  
Irrevocable Trust [Member] | Bradley Scott Emalfarb [Member]          
Debt Instrument, Face Amount   $ 410,000   $ 410,000  
Debt Instrument, Interest Rate, Stated Percentage   8.00%   8.00%  
Interest Payable   $ 8,200   $ 8,200  
Irrevocable Trust [Member] | Thomas Emalfarb, Scott Emalfarb and Michael Emalfarb [Member]          
Interest Payable   $ 1,800   $ 1,800  
Irrevocable Trust [Member] | Conversion Of Convertible Notes Into Common Stock [Member] | Bradley Emalfarb [Member]          
Debt Conversion, Converted Instrument, Shares Issued (in shares)       400,000