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Note 5 - Redeemable Preferred Stock (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Dec. 27, 2019
Mar. 31, 2020
Sep. 30, 2024
Sep. 30, 2024
Dec. 31, 2023
Nov. 14, 2019
Nov. 26, 2014
Class B Preferred Units [Member]              
Preferred Units, Issued (in shares)           50,500,000  
Preferred Unit Purchase Price (in dollars per share)           $ 1  
Preferred Units Issued, Percentage of Preferred Return           16.00%  
Preferred Units Issued, Maximum Percentage Points of Preferred Return in Form of Issuance of Additional Units or Cash           6.00%  
Additional Preferred Units Issued (in shares)   50,000,000          
Preferred Units, Shares, Redeemed During Period (in shares)     25,500,000 25,500,000      
Preferred Units, Redemption Price Per Unit (in dollars per share)     $ 1 $ 1      
Series A Preferred Stock [Member]              
Preferred stock, shares issued (in shares) 400,000   400,000 400,000 400,000    
Preferred stock, liquidation preference $ 40   $ 40 $ 40 $ 40    
Preferred Stock, Dividend Rate, Percentage 6.00%            
Temporary Equity, Redemption Price Per Share (in dollars per share) $ 100            
Temporary Equity, Conversion Price Per Share (in dollars per share) $ 10            
Dove Ventures, LLC [Member] | Senior Secured Term Loan Facility [Member]              
Line of Credit Facility, Maximum Borrowing Capacity             $ 40
Extinguishment of Debt, Amount $ 40