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Note 7 - Options and Warrants to Purchase Common Stock (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value $ 0   $ 0    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options 58,000   $ 58,000    
Warrants Issued     0   0
Intrinsic Value of Outstanding Warrants 0   $ 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     650,000    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price     $ 0.25    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 0.02    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value 0   $ 0    
Employee Stock Option [Member]          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     211 days    
Allocated Share-based Compensation Expense $ 44,927 $ 238,064 $ 113,811 $ 365,045