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Note 6 - Long-term Debt (Details Textual)
3 Months Ended 9 Months Ended
Jun. 22, 2022
USD ($)
$ / shares
shares
Mar. 01, 2022
USD ($)
Apr. 08, 2021
USD ($)
$ / shares
shares
Sep. 30, 2023
USD ($)
$ / shares
shares
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
$ / shares
shares
Sep. 30, 2022
USD ($)
Oct. 13, 2023
USD ($)
May 26, 2023
$ / shares
Dec. 31, 2022
USD ($)
$ / shares
Stock Issued During Period, Shares, Issued for Commitment Fee (in shares) | shares     10,000              
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares     $ 0.001 $ 0.001   $ 0.001     $ 0.001 $ 0.001
Senior Promissory Notes Placement Agent Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares 28,846                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 5.2                  
Warrants and Rights Outstanding, Term (Year) 5 years                  
The 2023 Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares       531,250   531,250        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares       $ 5.2   $ 5.2        
Warrants and Rights Outstanding, Term (Year)       5 years   5 years        
Senior Promissory Notes [Member]                    
Debt Instrument, Face Amount $ 6,000,000     $ 6,000,000   $ 6,000,000       $ 6,000,000
Interest Expense, Debt       0 $ 0 0 $ 0      
Amortization of Debt Issuance Costs       86,447 84,098 257,765 90,989      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares 531,250                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 5.2                  
Warrants and Rights Outstanding, Term (Year) 5 years                  
Debt Instrument, Term (Month) 24 months                  
Debt Instrument, Interest Rate, Stated Percentage 10.00%                  
Debt Instrument, Stated Rate, Monthly Increase if Unpaid 1.00%                  
Debt Instrument, Unamortized Discount $ 695,749     1,455,127   1,455,127       $ 519,686
Senior Promissory Notes [Member] | Subsequent Event [Member]                    
Debt Instrument, Unamortized Discount               $ 1,193,206    
Senior Promissory Notes [Member] | Measurement Input, Expected Term [Member]                    
Debt Instrument, Measurement Input 2.5                  
Senior Promissory Notes [Member] | Measurement Input, Expected Term [Member] | Subsequent Event [Member]                    
Debt Instrument, Measurement Input               5    
Senior Promissory Notes [Member] | Measurement Input, Share Price [Member]                    
Debt Instrument, Measurement Input 3.44                  
Senior Promissory Notes [Member] | Measurement Input, Share Price [Member] | Subsequent Event [Member]                    
Debt Instrument, Measurement Input               3.89    
Senior Promissory Notes [Member] | Measurement Input, Exercise Price [Member]                    
Debt Instrument, Measurement Input 5.2                  
Senior Promissory Notes [Member] | Measurement Input, Exercise Price [Member] | Subsequent Event [Member]                    
Debt Instrument, Measurement Input               5.2    
Senior Promissory Notes [Member] | Measurement Input, Price Volatility [Member]                    
Debt Instrument, Measurement Input 0.808                  
Senior Promissory Notes [Member] | Measurement Input, Price Volatility [Member] | Subsequent Event [Member]                    
Debt Instrument, Measurement Input               0.7366    
Senior Promissory Notes [Member] | Measurement Input, Risk Free Interest Rate [Member]                    
Debt Instrument, Measurement Input 0.0313                  
Senior Promissory Notes [Member] | Measurement Input, Risk Free Interest Rate [Member] | Subsequent Event [Member]                    
Debt Instrument, Measurement Input               0.046    
Senior Promissory Notes [Member] | Measurement Input, Forfeiture Rate [Member]                    
Debt Instrument, Measurement Input 0                  
Senior Promissory Notes [Member] | Measurement Input, Forfeiture Rate [Member] | Subsequent Event [Member]                    
Debt Instrument, Measurement Input               0    
Senior Promissory Notes [Member] | Maximum [Member]                    
Debt Instrument, Interest Rate, Stated Percentage 16.00%                  
Convertible Debt [Member]                    
Debt Instrument, Face Amount     $ 15,000,000              
Debt Instrument, Redemption Price, Percentage     112.00%              
Debt Instrument, Convertible, Conversion Ratio     805.3992              
Debt Instrument, Periodic Payment, Principal   $ 840,000                
Debt Instrument, Redemption Covenant, Floor Price (in dollars per share) | $ / shares     $ 14              
Repayments of Convertible Debt $ 13,446,875 $ 840,000                
Repayments of Convertible Debt, Principal 11,640,000                  
Repayments of Convertible Debt, Premium $ 1,806,875                  
Interest Expense, Debt       0   0 308,958      
Amortization of Debt Issuance Costs       $ 0 $ 0 $ 0 $ 2,213,065