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Note 1 - Basis of Presentation (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Feb. 02, 2023
Jan. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Mar. 06, 2024
Net Income (Loss) Attributable to Parent     $ (6,850,000) $ (10,691,000)    
Working Capital     16,000,000      
Net Cash Provided by (Used in) Operating Activities     (2,873,000) (4,069,000)    
Gain (Loss) on Extinguishment of Debt     0 $ (5,331,000) $ (5,300,000)  
Interest Paid, Including Capitalized Interest, Operating and Investing Activities     362,000      
Paid-in-Kind Interest     380,000      
Dividends Payable, Current     1,265,000   1,288,000  
Series A Preferred Stock [Member]            
Dividends Payable, Current     $ 1,270,000      
First Amended Credit Agreement 1 [Member]            
Repayments of Debt   $ 15,000,000        
Debt Instrument, Convertible, Conversion Price (in dollars per share) $ 4.8          
First Amended Credit Agreement 1 [Member] | Maximum [Member]            
Debt Conversion, Original Debt, Amount $ 15,000,000          
Senior Secured Convertible Terms Loans [Member]            
Debt Instrument, Face Amount           $ 20,000,000
Secured Non Convertible Terms Loans [Member]            
Debt Instrument, Face Amount         20,000,000 $ 21,200,000
Convertible Loans [Member]            
Debt Instrument, Convertible, Conversion Price (in dollars per share)           $ 5.3
Debt Instrument, Face Amount           $ 16,000,000
Private Placement [Member] | Direct Offering [Member]            
Proceeds from Issuance of Common Stock         $ 15,000,000  
Stock Issued During Period, Shares, New Issues (in shares)   10,500,000        
Shares Issued, Price Per Share (in dollars per share)   $ 3.84        
Proceeds from Issuance of Common Stock, Gross   $ 40,320,000        
Proceeds from Issuance of Common Stock, Net   $ 38,500,000