v3.25.1
Note 5 - Preferred Stock (Details Textual) - USD ($)
 3 Months Ended 12 Months Ended 24 Months Ended
Oct. 06, 2023
Mar. 31, 2023
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Mar. 30, 2023
Preferred Stock, Shares Authorized (in shares)     5,000,000   5,000,000   5,000,000  
Preferred Stock, Shares Designated (in shares)     1,983,250          
Preferred Stock, Shares Issued (in shares)     545   545   545  
Preferred Stock, Shares Outstanding (in shares)     545   545   545  
Class of Warrant or Right, Outstanding (in shares)     2,262,203          
Preferred Warrants [Member]                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)     $ 975          
Warrants and Rights Outstanding, Term (Year)     3 years          
Class of Warrant or Right, Percentage of Securities Called by Warrants or Rights     100.00%          
Class of Warrant or Right, Exercised (in shares)     0          
Class of Warrant or Right, Outstanding (in shares)     31,102          
Conversion of Series F Preferred Stock to Common Stock [Member]                
Conversion of Stock, Shares Converted (in shares)     0 922        
Conversion of Stock, Amount of Dividends Converted       $ 84,000        
Conversion of Stock, Shares Issued (in shares)     641,592 90,056 288,968 352,624 641,592  
Series F Preferred Stock [Member]                
Preferred Stock, Convertible, Conversion Price (in dollars per share)     $ 11.17   $ 11.17 $ 13.6 $ 11.17 $ 68.4
Preferred Stock, Convertible, Conversion Price Percentage               80.00%
Preferred Stock, Convertible, Floor Price (in dollars per share) $ 11.17   $ 11.17          
Preferred Stock, Stated Value Per Share (in dollars per share) $ 1,000              
Preferred Stock, Dividend Rate, Percentage 9.00%   20.00%          
Conversion of Stock, Shares Converted (in shares)         3,033      
Preferred Stock, Shares Outstanding (in shares)     545     1,930    
Dividends Payable     $ 41,000   $ 29,000,000 $ 136,000,000 $ 29,000,000  
Private Placement [Member]                
Proceeds from Issuance or Sale of Equity   $ 6,386,000            
Proceeds from Issuance or Sale of Equity, Net   5,364,000            
Payments of Stock Issuance Costs   $ 1,022,000            
Maximum [Member]                
Preferred Stock, Shares Authorized (in shares)     5,000,000