v3.26.1
Note 9 - Stockholders' Equity - Convertible Preferred Stock (Details) - USD ($)
Jun. 30, 2026
May 27, 2026
Mar. 04, 2026
Dec. 31, 2025
Jun. 18, 2025
Series B Preferred Stock [Member]          
Preferred Stock, Shares Issued (in shares) 216     6,000  
Preferred Stock, Shares Outstanding (in shares) 216     6,000  
Carrying Value $ 1,457,002        
Preferred Stock, Par or Stated Value Per Share (in dollars per share) $ 0.0001     $ 0.0001 $ 0.0001
Preferred Stock, Convertible, Conversion Price (in dollars per share) $ 1.58   $ 1.176    
Common shares upon conversion (in shares) 922,153        
Series C Preferred Stock [Member]          
Preferred Stock, Shares Issued (in shares) 100     0  
Preferred Stock, Shares Outstanding (in shares) 100     0  
Carrying Value $ 100,000        
Preferred Stock, Par or Stated Value Per Share (in dollars per share) $ 0.0001     $ 0.0001  
Preferred Stock, Convertible, Conversion Price (in dollars per share) $ 1.58 $ 1.58      
Common shares upon conversion (in shares) 63,291        
Series D Preferred Stock [Member]          
Preferred Stock, Shares Issued (in shares) 500     0  
Preferred Stock, Shares Outstanding (in shares) 500     0  
Carrying Value $ 500,000        
Preferred Stock, Par or Stated Value Per Share (in dollars per share) $ 0.0001     $ 0.0001  
Preferred Stock, Convertible, Conversion Price (in dollars per share) $ 1.58        
Common shares upon conversion (in shares) 316,456