v3.26.1
Note 3 - Sale of Stock for Cash (Details Textual) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 20, 2026
Proceeds from Issuance of Common Stock           $ 647,000 $ 793,000  
The Six Month Warrants Issued in Unit Offerings [Member]                
Warrants and Rights Outstanding, Term (Month) 6 months 6 months       6 months    
The Five Year Warrants Issued in Unit Offerings [Member]                
Warrants and Rights Outstanding, Term (Month) 5 years 5 years       5 years    
Unit Offering [Member]                
Stock Issued During Period, Shares, New Issues (in shares)   0 555,556     0    
Proceeds from Issuance of Common Stock     $ 100,000          
Equity Offering, Financing Fee   $ 15,000 $ 15,000 $ 15,000     $ 30,000  
Lincoln Park Capital Fund, LLC [Member]                
Stock Issued During Period, Shares, New Issues (in shares)   0 984,188   0   4,077,285  
Proceeds from Issuance of Common Stock     $ 171,000       $ 823,000  
Clearthink Capital Partners, LLC [Member]                
Stock Issued During Period, Shares, New Issues (in shares) 3,250,000              
Stock Purchase Agreement, Maximum Amount of Common Stock               $ 10,000,000
Value of Stock Directed Amount to Purchase               $ 500,000
Percent of Daily Average Shares Traded               300.00%
Value of Average Shares Traded               $ 25,000
Stock Issued During Period, Shares, Commitment Fee (in shares)     500,000          
Stock Issued During Period, Value, Financing Fees     $ 85,000          
Shares Issued, Price Per Share (in dollars per share)     $ 0.17          
Proceeds From Issuance of Common Stock, Gross $ 391,000