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Note 7 - Long-term Debt (Details Textual)
3 Months Ended 4 Months Ended 9 Months Ended
Jun. 22, 2022
USD ($)
$ / shares
shares
Mar. 01, 2022
USD ($)
Apr. 08, 2021
USD ($)
$ / shares
shares
Sep. 30, 2022
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
Jun. 21, 2022
USD ($)
Sep. 30, 2022
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
May 17, 2022
$ / shares
Dec. 31, 2021
USD ($)
$ / shares
Stock Issued During Period, Shares, Issued for Commitment Fee (in shares) | shares     80,000              
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 Warrant [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares 4,250,000                  
Senior Promissory Notes Placement Agent Warrants [Member]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares 230,000                  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 0.65                  
Warrants and Rights Outstanding, Term (Year) 5 years                  
Senior Promissory Notes [Member]                    
Debt Instrument, Face Amount $ 6,000,000.0     $ 6,000,000     $ 6,000,000     $ 0
Interest Expense, Debt, Total       84,098 $ 0   90,989 $ 0    
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, Total $ 664,704     604,760     604,760     $ (0)
Senior Promissory Notes [Member] | Measurement Input, Expected Term [Member]                    
Debt Instrument, Measurement Input 2.5                  
Senior Promissory Notes [Member] | Measurement Input, Share Price [Member]                    
Debt Instrument, Measurement Input 0.43                  
Senior Promissory Notes [Member] | Measurement Input, Exercise Price [Member]                    
Debt Instrument, Measurement Input 0.65                  
Senior Promissory Notes [Member] | Measurement Input, Price Volatility [Member]                    
Debt Instrument, Measurement Input 0.808                  
Senior Promissory Notes [Member] | Measurement Input, Risk Free Interest Rate [Member]                    
Debt Instrument, Measurement Input 0.0313                  
Senior Promissory Notes [Member] | Measurement Input, Forfeiture Rate [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     $ 15,000,000.0              
Debt Instrument, Redemption Price, Percentage     112.00%              
Debt Instrument, Convertible, Conversion Ratio     0.1006749              
Debt Instrument, Periodic Payment, Principal   $ 840,000                
Debt Instrument, Redemption Covenant, Floor Price (in dollars per share) | $ / shares     $ 1.75              
Repayments of Convertible Debt $ 13,446,875 $ 840,000       $ 3,360,000        
Repayments of Convertible Debt, Principal 11,640,000                  
Repayments of Convertible Debt, Premium $ 1,806,875                  
Interest Expense, Debt, Total       0 481,712   308,958 904,350    
Amortization of Debt Issuance Costs       $ 0 $ 292,129   $ 2,213,065 $ 360,417