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NOTES PAYABLE - 2020 10% Notes (Details) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Apr. 20, 2021
Feb. 08, 2021
Dec. 31, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2019
Dec. 23, 2020
Sep. 30, 2019
Debt Instrument [Line Items]                        
Exercise price of warrants       $ 1.00     $ 1.00          
Additional paid-in capital     $ 75,891,414   $ 80,140,373     $ 80,140,373        
Beneficial conversion feature               $ 1,110,039 $ 233,500      
Common stock, par value     $ 0.001   $ 0.001     $ 0.001        
10% Warrants                        
Debt Instrument [Line Items]                        
Percentage of aggregate principal amount coverage   20.00% 20.00%                  
Exercise price of warrants $ 0.56 $ 0.56 $ 0.56                  
Interest rate (as a percent) 10.00% 10.00% 10.00%   10.00%     10.00%        
Additional paid-in capital $ 810,000                      
10% Notes                        
Debt Instrument [Line Items]                        
Aggregate principal amount     $ 2,940,000                  
Stock issued     1,050,011                  
Interest rate (as a percent)   10.00% 10.00%   10.00%     10.00%   10.00% 10.00%  
Amortization of debt discount         $ 21,630 $ 0   $ 43,023 0      
Beneficial conversion feature     $ 0                  
10% Notes 2021                        
Debt Instrument [Line Items]                        
Aggregate principal amount   $ 1,660,000                    
Stock issued   592,858                    
Interest rate (as a percent)   10.00%                    
Conversion price (in dollars per share)   $ 0.66                    
Debt conversion commitment price (in dollars per share)   0.90                    
Amortization of debt discount         70,377 0   109,818 0      
Common stock, par value   $ 0.001                    
10% Notes April 2021                        
Debt Instrument [Line Items]                        
Aggregate principal amount $ 2,300,000                      
Percentage of aggregate principal amount coverage 20.00%                      
Exercise price of warrants $ 0.56                      
Interest rate (as a percent) 10.00%                      
Conversion price (in dollars per share) $ 0.49                      
Debt conversion commitment price (in dollars per share) $ 0.83                      
Amortization of debt discount         100,949 0   100,949 0      
Convertible note offering amount $ 4,600,000                      
Number of lead investor 1                      
Aggregate principal amount invested 35.50%                      
10% Investors                        
Debt Instrument [Line Items]                        
Proceeds from debt     $ 1,940,000                  
Interest rate (as a percent) 10.00% 10.00% 10.00%                  
Conversion price trigger (as a percent) 80.00% 80.00% 80.00%                  
10% Investors | Minimum                        
Debt Instrument [Line Items]                        
Conversion price (in dollars per share) $ 0.65 $ 0.65 $ 0.65                  
10% Investors | Maximum                        
Debt Instrument [Line Items]                        
Percentage of aggregate principal amount coverage 50.00% 50.00% 50.00%                  
Conversion price (in dollars per share) $ 1.00 $ 1.00 $ 1.00                  
15% Notes                        
Debt Instrument [Line Items]                        
Aggregate principal amount       $ 2,031,000     $ 2,031,000     $ 300,000    
Proceeds from debt       $ 525,000     $ 525,000     $ 300,000    
Aggregate indebtedness amount     $ 1,000,000                  
Interest rate (as a percent)     15.00% 15.00%     15.00%     15.00%   12.00%
Amortization of debt discount         $ 0 $ 72,516   $ 0 $ 138,837      
Debt discount | 10% Warrants                        
Debt Instrument [Line Items]                        
Additional paid-in capital   $ 429,300 $ 254,400                  
Debt discount | 10% Notes 2021                        
Debt Instrument [Line Items]                        
Additional paid-in capital   $ 417,539                    
Debt discount | 10% Notes April 2021                        
Debt Instrument [Line Items]                        
Additional paid-in capital $ 692,500                      
Extinguishment of debt | 10% Warrants                        
Debt Instrument [Line Items]                        
Additional paid-in capital     131,000                  
Extinguishment of debt | 15% Notes                        
Debt Instrument [Line Items]                        
Additional paid-in capital     $ 668,335