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Note 6 - Debt (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Nov. 12, 2020
Jul. 10, 2020
May 01, 2020
Jul. 17, 2019
Dec. 06, 2018
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Jul. 20, 2020
Dec. 31, 2019
May 21, 2019
Repayments of Notes Payable           $ 832 $ 110,980        
Repayments of Trade Payables $ 133,880                    
Proceeds from Related Party Debt           $ 5,000        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)           479,554          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)           $ 0.97   $ 0.97   $ 1.95  
Second Warrants Issued With Convertible Notes Payable [Member]                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)   360,000             360,000    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                 $ 1    
Notes Payable, Other Payables [Member] | Director, President, CEO,CFO, and Secretary [Member]                      
Proceeds from Related Party Debt         $ 108,000            
Repayments of Related Party Debt               $ 107,141      
Due to Related Parties, Total           $ 859          
Convertible Notes Payable Issued May 21, 2019 [Member]                      
Debt Instrument, Interest Rate, Stated Percentage           8.00%   8.00%     8.00%
Debt Instrument, Face Amount           $ 385,000   $ 385,000     $ 385,000
Convertible Notes Payable Issued July 17, 2019 [Member]                      
Debt Instrument, Interest Rate, Stated Percentage           8.00%   8.00%      
Debt Instrument, Face Amount       $ 165,000   $ 165,000   $ 165,000      
Debt Instrument, Discount Rate       10.00%              
Debt Instrument, Convertible, Beneficial Conversion Feature       $ 342,308              
Debt Instrument, Redemption Fee, Amount               $ 24,750   $ 57,750  
Convertible Notes Payable Issued July 10, 2020 [Member] | Embedded Derivative Financial Instruments [Member]                      
Adjustments to Additional Paid in Capital, Convertible Note Forbearance Extinguishment of Derivative Liability   $ 522,065                  
Warrants Issued in Connection Amendment of Notes Payable [Member]                      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)   $ 1                  
Warrants Issued   $ 371,243                  
Paycheck Protection Program CARES Act [Member]                      
Proceeds from Issuance of Long-term Debt, Total     $ 130,200                
Debt Instrument, Interest Rate, Stated Percentage     1.00%     1.00%   1.00%      
Debt Instrument, Face Amount           $ 130,200   $ 130,200      
Loan Agreement [Member]                      
Debt Instrument, Interest Rate, Stated Percentage 12.00%         12.00%          
Debt Instrument, Face Amount $ 1,000,000         $ 1,000,000          
Secured Note Payable [Member]                      
Repayments of Notes Payable $ 100,000