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Note 2 - Recapitalization (Details Textual) - USD ($)
1 Months Ended 2 Months Ended 9 Months Ended 12 Months Ended
Feb. 05, 2020
Dec. 10, 2019
Sep. 17, 2018
Dec. 31, 2021
Dec. 31, 2020
Oct. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Nov. 30, 2021
Nov. 30, 2020
Oct. 05, 2020
Stock Issued During Period, Shares, New Issues (in shares)           487,500                
Proceeds from Issuance of Common Stock           $ 195,000                
Shares Issued, Price Per Share (in dollars per share)           $ 0.40                
Share-based Payment Arrangement, Expense                 $ 9,145 $ 0        
Class of Warrant or Right, Outstanding (in shares)       233,333         450,000 233,333        
Warrant Modification, Amount                 $ (0) $ 795,592        
Three Individuals [Member]                            
Shares Issued, Shares, Share-based Payment Arrangement, before Forfeiture (in shares)           962,500                
Share-based Payment Arrangement, Expense           $ 333,628                
Series A Preferred Stock Converted into Common Stock [Member]                            
Conversion of Stock, Shares Issued (in shares)           2,700,000                
Conversion of the 2018 Convertible Notes into Common Stock [Member]                            
Repayments of Convertible Debt $ 350,000                          
Stock Issued During Period, Shares, Conversion of Convertible Securities (in shares) 350,000                          
Conversion of the 2019 Senior Secured Notes into Common Stock [Member]                            
Debt Conversion, Original Debt, Amount           $ 305,000                
Debt Conversion, Original Debt, Accrued Interest, Amount           $ 30,400                
Debt Conversion, Converted Instrument, Shares Issued (in shares)           838,487                
Debt Instrument, Convertible, Conversion Price (in dollars per share)           $ 0.40                
Warrants Issued with the 2018 Convertible Notes [Member]                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)     466,666                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                 $ 0.15          
Class of Warrant or Right, Outstanding (in shares)       233,333         0 233,333        
Warrants Issued with the 2018 Convertible Notes [Member] | Auctus Fund, LLC [Member]                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)     233,333                      
Warrants Issued with 2019 Senior Secured Notes [Member]                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)             457,500              
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)             $ 0.15              
Warrants Issued to Investors [Member]                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           3,977,961                
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)           $ 0.40                
Warrants Issued to Three Individuals [Member]                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           2,887,500                
Modified Warrants [Member]                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                         6,865,461  
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)       $ 0.20           $ 0.20   $ 0.40 $ 0.20 $ 0.40
Share-based Payment Arrangement, Expense       $ 13,936           $ 13,936        
Class of Warrant or Right, Outstanding (in shares)       6,865,461           6,865,461        
Warrant Modification, Amount       $ 795,592 $ 795,592                  
The 2018 Convertible Notes [Member]                            
Debt Instrument, Interest Rate, Stated Percentage     12.00%                      
Debt Instrument, Face Amount               $ 205,000            
Proceeds from Convertible Debt     $ 315,800                      
Payments of Debt Issuance Costs     $ 34,200                      
Debt Instrument, Term (Month)     9 months                      
Debt Instrument, Convertible, Period After Date of Issuance (Month)     6 months                      
Debt Instrument, Convertible, Conversion Price, Percentage Discount of Common Stock Trading Price     40.00%                      
Debt Instrument, Amendment Fee               $ 69,000            
Debt Instrument, Amendment Fee, Percent of Face Value               20.00%            
Debt Instrument, Increase (Decrease) in Principal of Each Note               $ 30,000            
Repayments of Convertible Debt   $ 220,000                        
Gain (Loss) on Extinguishment of Debt, Total                     $ 246,000      
The 2018 Convertible Notes [Member] | Auctus Fund, LLC [Member]                            
Debt Instrument, Face Amount     $ 175,000                      
The 2019 Senior Secured Notes [Member]                            
Debt Instrument, Interest Rate, Stated Percentage             12.00%              
Debt Instrument, Face Amount             $ 305,000              
Gain (Loss) on Extinguishment of Debt, Total           $ 89,776                
Proceeds from Issuance of Senior Long-term Debt             $ 220,000