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Note 7 - Line of Credit, Notes Payable and Liquidity (Details Textual) - USD ($)
Aug. 31, 2017
Dec. 05, 2016
Jun. 30, 2016
Feb. 29, 2016
Mar. 18, 2013
Sep. 30, 2018
Feb. 03, 2015
Dec. 18, 2013
Line of Credit Facility, Maximum Borrowing Capacity         $ 2,000,000   $ 5,000,000 $ 4,000,000
Debt Instrument, Interest Rate, Stated Percentage         2.00%      
Debt Instrument, Periodic Payment, Interest         $ 9,500      
Long-term Line of Credit, Total           $ 3,200,000    
Line of Credit Facility, Interest Rate at Period End           4.25%    
Matures on April 1, 2019 [Member] | Chief Executive Officer and Director Mr. Wit [Member]                
Debt Instrument, Interest Rate, Stated Percentage       12.00%        
Debt Instrument, Face Amount       $ 450,000        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       1,800,000        
Class of Warrant or Right, Exercise Price of Warrants or Rights       $ 0.25        
Extinguishment of Debt, Amount       $ 450,000        
Warrants Sold During the Period   1,000,000            
Repayments of Long-term Debt, Total $ 50,000              
Warrants and Rights Outstanding       325,689        
Debt Instrument, Fair Value Disclosure, Total       $ 124,311        
Amortization Period of Warrant Liabilities       3 years 30 days        
Matures April 1, 2020 I [Member] | Investor [Member]                
Debt Instrument, Interest Rate, Stated Percentage     12.00%          
Debt Instrument, Face Amount     $ 372,500          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     1,490,000          
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 0.25          
Repayments of Long-term Debt, Total $ 90,000              
Warrants and Rights Outstanding     $ 246,921          
Debt Instrument, Fair Value Disclosure, Total     $ 125,579          
Amortization Period of Warrant Liabilities     3 years 270 days          
Matures April 1, 2020 II [Member] | Investor [Member]                
Debt Instrument, Interest Rate, Stated Percentage     10.00%          
Debt Instrument, Face Amount     $ 420,000          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights     1,680,000          
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 0.25          
Warrants and Rights Outstanding     $ 278,408          
Debt Instrument, Fair Value Disclosure, Total     $ 141,592          
Amortization Period of Warrant Liabilities     3 years 270 days