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Note 11 - Convertible Notes Payable (Details Textual) - USD ($)
3 Months Ended
Jul. 10, 2019
Jul. 01, 2019
Jun. 14, 2019
Apr. 04, 2019
Jun. 30, 2019
Sep. 30, 2019
Nov. 11, 2015
Stock Issued During Period, Shares, Commitment Fees     200,000 80,000 310,000    
Stock Returned to Company, Prepayment of Debt Covenant         180,000    
Adjustments to Additional Paid in Capital, Commitment Fee Adjustment         $ 270,000    
Class of Warrant or Right, Exercise Price of Warrants or Rights             $ 3.60
Payments of Stock Issuance Costs, Commitment Fees $ 50,000            
Stock Issued During Period, Shares, Issued for Due Diligence Fee 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            
Investor Warrant [Member]              
Warrants and Rights Outstanding, Term 5 years            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 2,000,000            
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 1.50            
Class of Warrant or Rights, Maximum Percentage of Securities Called by Warrants or Rights 20.00%            
The Note [Member] | Senior Secured Convertible Note [Member]              
Debt Instrument, Convertible, Conversion Price $ 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, Interest Default Rate Percentage 18.00%            
Debt Instrument, Periodic Payment, Principal, Maximum Percent 20.00%            
Debt Instrument, Convertible, Percent 25.00%            
Convertible Debentures [Member]              
Proceeds from Issuance of Debt       $ 550,000      
Debt Instrument, Convertible, Conversion Price       $ 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   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     $ 1.50        
Debt Instrument, Fee Amount     $ 30,000        
Debt Instrument, Interest Rate, Stated Percentage     10.00%        
Stock Returned to Company, Prepayment of Debt Covenant     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           $ 856,888  
Debt Instrument, Fee Amount         465,000    
Debt Issuance Costs, Net, Total         195,000    
Legal Fees         $ 17,000