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Note 5 - Redeemable, Convertible Preferred Stock (Details Textual)
 3 Months Ended 9 Months Ended
Aug. 08, 2025
USD ($)
$ / shares
shares
Feb. 26, 2024
Feb. 26, 2023
Feb. 26, 2021
USD ($)
$ / shares
shares
Sep. 30, 2025
USD ($)
$ / shares
Jun. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
Days
$ / shares
Sep. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Cash dividend         $ 1,000,000   $ 1,000,000 $ 3,000,000 $ 3,000,000  
Preferred Stock, No Par Value (in dollars per share) | $ / shares         $ 0     $ 0    
Common Stock [Member]                    
Common stock issued upon conversion of prefered stock | shares 15,103,163                  
Series B Preferred Stock [Member]                    
Preferred Stock, Dividend Rate, Percentage       4.00%            
Cash dividend         $ 0 $ 0        
Preferred Stock, No Par Value (in dollars per share) | $ / shares       $ 0            
Temporary Equity, Fair Value of Preferred Stock at Issuance       $ 95,000,000            
Temporary Equity, Liquidation Preference Per Share (in dollars per share) | $ / shares       $ 100            
Debt Instrument, Convertible, Stock Price Trigger (in dollars per share) | $ / shares               $ 14.5    
Embedded Derivative, Fair Value of Embedded Derivative Liability       $ 1,000,000            
Series B Preferred Stock [Member] | Minimum [Member]                    
Temporary Equity, Convertible, Threshold Trading Days (Day)               45 days    
Series B Preferred Stock [Member] | Maximum [Member]                    
Temporary Equity, Convertible, Threshold Trading Days (Day)               60 days    
Embedded Derivative, Fair Value of Embedded Derivative Liability         $ 1,000,000     $ 1,000,000   $ 1,000,000
Series C Preferred Stock [Member]                    
Embedded Derivative, Fair Value of Embedded Derivative Liability       $ 2,000,000            
Series C Preferred Stock [Member] | After February Twenty Six Two Thousand Twenty Four [Member]                    
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger     200.00%              
Temporary Equity, Convertible, Threshold Percentage of Stock Price Trigger   150.00%                
Series C Preferred Stock [Member] | Minimum [Member]                    
Debt Instrument, Convertible, Threshold Trading Days | Days               45    
Series C Preferred Stock [Member] | Minimum [Member] | Other Noncurrent Liabilities [Member]                    
Embedded Derivative, Fair Value of Embedded Derivative Liability                   $ 1,000,000
Series C Preferred Stock [Member] | Maximum [Member]                    
Debt Instrument, Convertible, Threshold Consecutive Trading Days | Days               60    
Repurchase And Exchange Agreement [Member] | Series A Preferred Stock [Member]                    
Stock Repurchased During Period, Shares (in shares) | shares       1,000,000            
Repurchase And Exchange Agreement [Member] | Series B Preferred Stock [Member]                    
Preferred Stock, Dividend Rate, Percentage       4.00%            
Purchase Agreement [Member] | Series B Preferred Stock [Member]                    
Convertible Preferred Stock, Share Conversion, Rate (in shares) | shares       9.5238            
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares       $ 10.5            
Purchase Agreement [Member] | Series C Preferred Stock [Member]                    
Preferred Stock, Dividend Rate, Percentage       5.00%            
Preferred Stock, No Par Value (in dollars per share) | $ / shares       $ 0            
Temporary Equity, Liquidation Preference Per Share (in dollars per share) | $ / shares       100            
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares       $ 10            
Stock Issued During Period, Shares, New Issues (in shares) | shares       1,000,000            
Shares Issued, Price Per Share (in dollars per share) | $ / shares       $ 100            
Proceeds from Issuance or Sale of Equity       $ 100,000,000            
Dividend And Other Rights [Member] | Series C Preferred Stock [Member]                    
Preferred Stock, Dividend Rate, Percentage       5.00%            
Series C Preferred Stock Exchange Agreement [Member]                    
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares $ 8.25                  
Preferred stock aggregate liquidation preference $ 124,187,100                  
Preferred stock carrying value 123,000,000                  
Fair value of the common stock issued 106,000,000                  
Fair value premium inducement $ 19,000,000                  
Preferred stock voting rights               As a result of the Series C Preferred Stock Exchange the Investor’s voting power increased from 12.9% as of December 31, 2024 to 15.7% following the Series C Preferred Stock Exchange. In addition, in connection with the Series C Preferred Stock Exchange the Investor was granted the right to nominate one member for election to the Company’s Board for so long as it holds at least 10% of the outstanding shares of common stock of the Company.    
Minimum ownership percentage for board nomination right 10.00%                  
Series C Preferred Stock Exchange Agreement [Member] | Common Stock [Member]                    
Common stock issued upon conversion of prefered stock | shares 15,103,163                  
Series C Preferred Stock Exchange Agreement [Member] | Minimum [Member]                    
Remaining liability written off               $ 1,000,000    
Investor's voting power                   12.90%
Series C Preferred Stock Exchange Agreement [Member] | Maximum [Member]                    
Investor's voting power 15.70%                  
Series C Preferred Stock Exchange Agreement [Member] | Series C Preferred Stock [Member]                    
Common stock issued upon conversion of prefered stock | shares 1,241,871