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Note N - Convertible Notes Payable (Details Textual) - USD ($)
3 Months Ended
May 12, 2020
May 06, 2020
Jul. 10, 2019
Jul. 01, 2019
Jun. 14, 2019
Apr. 04, 2019
Jun. 30, 2019
Mar. 31, 2020
Mar. 30, 2020
Mar. 25, 2020
Mar. 12, 2020
Dec. 31, 2019
Nov. 11, 2015
Stock Issued During Period, Shares, Commitment Fees (in shares)         200,000 80,000 130,000            
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                         $ 3.60
Payments of Stock Issuance Costs, Commitment Fees     $ 50,000                    
Stock Issued During Period, Shares, Issued for Due Diligence Fee (in shares)     266,667                    
Stock Issued During Period, Value, Issued for Due Diligence Fee     $ 400,000                    
Payments of Stock Issuance Costs, Banker Fees     193,500                    
Payments of Stock Issuance Costs, Legal Fees     71,330                    
Class of Warrant or Right, Recorded as Debt Discount     $ 595,662                    
Forecast [Member]                          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)                   500,000      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                 $ 1.50        
Conversion of Senior Secured Convertible Note to Common Stock [Member] | Forecast [Member]                          
Conversion of Stock, Amount Converted $ 3,250,000                        
Conversion of Stock, Shares Issued (in shares) 4,999,995                        
Subsequent Event [Member]                          
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)               $ 0.65          
Investor Warrant [Member]                          
Warrants and Rights Outstanding, Term (Year)     5 years                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)     2,000,000                    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)     $ 1.50                    
Class of Warrant or Rights, Maximum Percentage of Securities Called by Warrants or Rights     20.00%                    
Senior Secured Convertible Note [Member] | Forecast [Member]                          
Proceeds from Issuance of Debt   $ 2,100,000                      
Debt Instrument, Fee Amount   133,333                      
Debt Instrument, Face Amount   $ 2,415,000                      
The Note [Member] | Senior Secured Convertible Note [Member]                          
Debt Instrument, Convertible, Conversion Price (in dollars per share)     $ 1.50                    
Debt Instrument, Unamortized Discount, Total     $ 510,000                    
Debt Instrument, Face Amount     3,060,000                    
Proceeds from Debt, Net of Issuance Costs     2,550,000                    
Debt Instrument, Periodic Payment, Principal due in 180 Days     918,000                    
Debt Instrument, Periodic Payment, Principal due in 270 Days     $ 1,071,000                    
Debt Instrument, Convertible, Percent     25.00%                    
Amended Note [Member] | Senior Secured Convertible Note [Member] | Subsequent Event [Member]                          
Debt Instrument, Convertible, Conversion Price (in dollars per share)                     $ 0.65    
Debt Instrument, Face Amount                     $ 3,789,000    
Convertible Debentures [Member]                          
Proceeds from Issuance of Debt           $ 550,000              
Debt Instrument, Convertible, Conversion Price (in dollars per share)           $ 1.50              
Debt Instrument, Discount Percentage           7.00%              
Debt Instrument, Unamortized Discount, Total           $ 40,000              
Debt Instrument, Number of Additional Borrowings Allowed           2              
Debt Instrument, Additional Borrowings Allowed Amount           $ 550,000              
Debt Agreement, Maximum Borrowing Capacity           1,020,000              
Stock Issued During Period, Shares, Commitment Fees (in shares)       10,000                  
Debt Instrument, Fee Amount           120,000              
Monthly Commitment Fee           $ 15,000              
Convertible Debentures [Member] | Minimum [Member]                          
Debt Instrument, Convertible, Premium Payment Percentage           5.00%              
Convertible Debentures [Member] | Maximum [Member]                          
Debt Instrument, Convertible, Premium Payment Percentage           25.00%              
Convertible Redeemable Note [Member]                          
Proceeds from Issuance of Debt         $ 157,000                
Debt Instrument, Convertible, Conversion Price (in dollars per share)         $ 1.50                
Debt Instrument, Fee Amount         $ 30,000                
Debt Instrument, Interest Rate, Stated Percentage         10.00%                
Stock Returned to Company, Prepayment of Debt Covenant (in shares)         20,000                
Convertible Redeemable Note [Member] | Minimum [Member]                          
Debt Instrument, Convertible, Premium Payment Percentage         10.00%                
Convertible Redeemable Note [Member] | Maximum [Member]                          
Debt Instrument, Convertible, Premium Payment Percentage         30.00%                
Convertible Debt [Member]                          
Debt Instrument, Unamortized Discount, Total                       $ 574,330  
Debt Issuance Costs, Net, Total             $ 195,000            
Legal Fees             $ 17,000