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Note 11 - Stockholders' Equity (Deficit) (Details Textual) - $ / shares
Sep. 09, 2022
Oct. 29, 2021
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Jan. 29, 2024
Common Stock, Shares Authorized (in shares)     150,000,000 150,000,000    
Preferred Stock, Shares Authorized (in shares)     5,000,000 5,000,000    
Preferred Stock, Convertible, Shares Issuable (in shares)     1,000      
Series B Preferred Stock [Member]            
Preferred Stock, Shares Outstanding (in shares)     1,000 1,000    
Series B Preferred Stock [Member] | Minimum [Member]            
Preferred Stock, Convertible, Percent of Issued Shares Converted           75.00%
Series B Preferred Stock [Member] | The 2021 Private Placement Program [Member]            
Stock Issued During Period, Shares, New Issues (in shares)   15,000        
Preferred Stock, Shares Outstanding (in shares)     131   131  
Series B Preferred Stock, Post-split [Member]            
Preferred Stock, Convertible, Conversion Price (in dollars per share)           $ 8.75
Series B Preferred Stock, Post-split [Member] | The 2021 Private Placement Program [Member]            
Preferred Stock, Convertible, Shares Issuable (in shares)     15,065      
Preferred Stock, Convertible, Conversion Price (in dollars per share)     $ 8.75      
Series C Preferred Stock [Member] | The 2022 Private Placement [Member]            
Stock Issued During Period, Shares, New Issues (in shares) 3,250          
Preferred Stock, Shares Outstanding (in shares)     0