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Note 3 - Long-term Debt (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Mar. 06, 2024
Feb. 02, 2023
Jul. 02, 2021
Jul. 01, 2021
Jun. 29, 2021
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Mar. 07, 2025
Dec. 31, 2023
Adjustment to Additional Paid-in Capital, Extinguishment of Debt $ 1,900,000           $ 1,928,000      
Adjustments to Additional Paid in Capital, Warrant Issued             $ 887,000      
Preferred Stock, Dividend Rate, Percentage           8.875% 8.875%      
Series A Preferred Stock [Member]                    
Preferred Stock, Dividend Rate, Percentage     8.875% 8.875% 8.875% 8.875%   8.875%    
Heerema Warrant [Member]                    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) 1,000,000                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 5               $ 4.75  
Adjustments to Additional Paid in Capital, Warrant Issued $ 900,000                  
New Loan [Member]                    
Debt Instrument, Face Amount     $ 50,000,000              
Debt Instrument, Interest Rate, Stated Percentage   7.00% 7.00%              
Repayments of Debt   $ 15,000,000                
Debt Instrument, Convertible, Maximum Amount   $ 15,000,000                
Debt Instrument, Convertible, Conversion Price (in dollars per share)   $ 4.8                
Debt Instrument, Principal Amount with Interest Paid in Cash   $ 20,000,000                
Debt Instrument, Principal Amount with Interest Paid in Kind   $ 15,000,000                
New Loan [Member] | Issuance After One Year of the Closing Date [Member]                    
Debt Instrument, Prepay Amount, Percentage of the Cash Proceeds Received     75.00%              
Their Amended Credit Agreement [Member]                    
Debt Instrument, Face Amount 20,000,000                  
Debt Instrument, Fee Amount $ 479,845                  
Shares Issued, Price Per Share (in dollars per share) $ 2.89                  
Shares Issued For Debt Agreement, Shares (in shares) 166,036                  
Secured Non Convertible Terms Loans [Member]                    
Debt Instrument, Face Amount $ 21,200,000                 $ 20,000,000
Convertible Loans [Member]                    
Debt Instrument, Face Amount $ 16,000,000                  
Debt Instrument, Interest Rate, Stated Percentage 7.00%                  
Debt Instrument, Convertible, Conversion Price (in dollars per share) $ 5.3         $ 5.04