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Note 8 - Subsequent Events (Details Textual) - USD ($)
Oct. 21, 2016
Nov. 04, 2016
Nov. 03, 2016
Sep. 30, 2016
Subsequent Event [Member] | Convertible Note [Member]        
Debt Instrument, Interest Rate, Stated Percentage 12.00%      
Debt Instrument, Face Amount $ 530,000      
Proceeds from Convertible Debt $ 500,000      
Debt Instrument, Convertible, Conversion Price $ 0.55      
Debt Instrument, Convertible, Period of Notice for Right to Prepayment 30 days      
Debt Instrument, Convertible, Stock Price Trigger $ 3      
Debt Instrument, Convertible, Threshold Consecutive Trading Days 30 days      
Subsequent Event [Member] | The $0.80 Warrant [Member]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 265,000      
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 0.80      
Subsequent Event [Member] | The $0.90 Warrant [Member]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 265,000      
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 0.90      
Subsequent Event [Member] | The 2016 Stock Incentive Plan [Member] | Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized     4,000,000  
Subsequent Event [Member] | The 2012 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Shares Granted to Date, Net of Cancellations   522,500    
Subsequent Event [Member] | The 2012 Plan and the 2016 Stock Incentive Plan [Member] | Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   4,850,130    
The 2012 Plan [Member] | Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       1,372,630
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant       812,630