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Note 11 - Stockholders' Equity (Deficit) (Details Textual)
 3 Months Ended 9 Months Ended
Oct. 16, 2025
USD ($)
shares
Oct. 09, 2025
shares
Aug. 19, 2025
USD ($)
shares
Sep. 09, 2022
shares
Oct. 29, 2021
shares
Sep. 30, 2025
USD ($)
$ / shares
shares
Sep. 29, 2025
USD ($)
Oct. 21, 2025
Dec. 31, 2024
USD ($)
shares
Sep. 30, 2024
shares
Jan. 29, 2024
$ / shares
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           1,000          
Voting Equivalent     0.424                
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares           $ 0.8          
Payments of Ordinary Dividends, Common Stock | $             $ 4,800,000        
Series B Preferred Stock [Member]                      
Preferred Stock, Shares Outstanding (in shares)           1,000     1,000    
Series B Preferred Stock [Member] | The 2021 Private Placement Program [Member]                      
Stock Issued During Period, Shares, New Issues         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) | $ / shares                     $ 8.75
Series B Preferred Stock, Post-split [Member] | The 2021 Private Placement Program [Member]                      
Preferred Stock, Convertible, Shares Issuable           15,065          
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares           $ 8.75          
Series C Preferred Stock [Member] | The 2022 Private Placement [Member]                      
Stock Issued During Period, Shares, New Issues       3,250              
Series D Preferred Stock [Member]                      
Preferred Stock, Shares Outstanding (in shares)           481,000     0    
Series D Preferred Stock [Member] | 2025 Preferred Stock Purchase Agreement [Member]                      
Stock Issued During Period, Shares, New Issues     481,250                
Preferred Stock, Shares Outstanding (in shares)           481,250          
Preferred Stock, Convertible, Shares Issuable     77,000,000                
Series E Preferred Stock [Member] | 2025 Preferred Stock Purchase Agreement [Member]                      
Stock Issued During Period, Shares, New Issues     268,750                
Preferred Stock, Convertible, Shares Issuable     43,000,000                
Series F Preferred Stock [Member]                      
Stock Issued During Period, Shares, New Issues     1,986,565                
Preferred Stock, Redemption Amount | $     $ 525,000                
Temporary Equity, Carrying Amount, Attributable to Parent | $     $ 525,000     $ 525,000     $ 0    
Subsequent Event [Member]                      
Common Stock, Shares Authorized (in shares) 1,500,000,000                    
Subsequent Event [Member] | 2025 Preferred Stock Purchase Agreement [Member]                      
Preferred Stock, Convertible, Shares Issuable   43,000,000                  
Subsequent Event [Member] | Series D Preferred Stock [Member]                      
Preferred Stock, Convertible, Conversion Ratio               160      
Subsequent Event [Member] | Series D Preferred Stock [Member] | 2025 Preferred Stock Purchase Agreement [Member]                      
Preferred Stock, Shares Outstanding (in shares)   441,326                  
Subsequent Event [Member] | Series E Preferred Stock [Member]                      
Stock Issued During Period, Shares, New Issues 268,750                    
Subsequent Event [Member] | Series E Preferred Stock [Member] | 2025 Preferred Stock Purchase Agreement [Member]                      
Stock Issued During Period, Shares, New Issues 268,750 268,750                  
Preferred Stock, Shares Outstanding (in shares)   268,750                  
Preferred Stock, Convertible, Conversion Ratio   160           160      
Subsequent Event [Member] | Series F Preferred Stock [Member]                      
Stock Redeemed or Called During Period, Shares (in shares) 639,933                    
Stock Redeemed or Called During Period, Value | $ $ 175,000