v3.26.1
Note 3 - Sale of Stock for Cash (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 13, 2022
Proceeds from Issuance of Common Stock $ 2,027,000 $ 594,000  
Lincoln Park Capital Fund, LLC [Member]      
Stock Purchase Agreement, Maximum Amount of Common Stock     $ 10,000,000
Stock Issued During Period, Shares, New Issues (in shares) 11,745,123 766,175  
Proceeds from Issuance of Common Stock $ 2,122,000 $ 260,000  
Payments of Stock Issuance Costs $ 250,000    
Accredited Investors [Member]      
Stock Issued During Period, Shares, New Issues (in shares) 1,131,579 1,848,720  
Proceeds from Issuance of Common Stock $ 155,000 $ 334,000  
Proceeds From Issuance of Common Stock, Gross $ 215,000 $ 419,000