Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Debt (Details Textual)

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Note 5 - Debt (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Dec. 17, 2023
May 16, 2022
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2022
SLR Agreement [Member]          
Debt Instrument, Multiplication of Face Value of Account 85.00%        
Debt Instrument, Face Amount $ 4,000,000        
Debt Instrument, Term 24 months        
Debt Instrument, Finance Fee, Percentage 2.00%        
Debt Instrument, Service Fee Rate 0.30%        
Debt Instrument, Minimum Utilization $ 400,000        
Long-Term Debt, Gross     $ 371,000    
Repayments of Debt     801,000    
Interest Paid, Excluding Capitalized Interest, Operating Activities     19,000    
Commitment Fee Expense     10,000    
SLR Agreement [Member] | Prime Rate [Member]          
Debt Instrument, Basis Spread on Variable Rate 2.00%        
SLR Agreement [Member] | Facility Rate [Member]          
Debt Instrument, Basis Spread on Variable Rate 6.00%        
Securities Purchase Agreement [Member] | Note Holders [Member]          
Debt Instrument, Face Amount   $ 4,320,000      
Debt Instrument, Term   12 months      
Repayments of Debt         $ 539,000
Interest Paid, Excluding Capitalized Interest, Operating Activities       $ 180,000 180,000
Debt Instrument, Discount, Percent   8.00%      
Debt Instrument, Interest Rate, Stated Percentage   9.00%      
Debt Instrument, Convertible, Conversion Price   $ 80      
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger   90.00%      
Debt Instrument, Unamortized Discount   $ 320,000     $ 40,000
Amortization of Debt Discount (Premium)     $ 40,000 280,000  
Convertible Notes Payable       $ 0