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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, 2024
Mar. 31, 2023
Dec. 31, 2023
Aug. 14, 2023
Unrealized Gain (Loss) on Derivatives           $ (0) $ 130,000    
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%  
Conversion Option on Debt [Member]                  
Derivative Liability   $ 2,400,000              
Unrealized Gain (Loss) on Derivatives             $ 130,000    
Conversion Option on Debt [Member] | Reclassified to Additional Paid-in Capital [Member]                  
Derivative Liability                 $ 2,570,000
Warrants Issued to Lenders [Member]                  
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)     500,000            
Warrants and Rights Outstanding     $ 1,900,000            
A Warrant [Member]                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)     $ 17.38            
Percentage of Closing Price Per Share of Common Stock     120.00%            
B Warrant [Member]                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)     $ 21.72            
Percentage of Closing Price Per Share of Common Stock     150.00%            
Warrants and Rights Outstanding, Term (Year)     180 years            
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                
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              
Debt Instrument, Unamortized Discount   2,000,000              
Debt Instrument, Convertible, Beneficial Conversion Feature   $ 980,000              
New Loan [Member] | Repayment After Thirty-months of the Closing Date [Member]                  
Debt Instrument, Repayment Fee Percentage     6.00%            
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