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Note 3 - Summary of Significant Accounting Policies (Details Textual) - shares
9 Months Ended 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 9,215,816 4,801,112    
Options and Warrants [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 6,418,887 4,801,112 5,111,111 4,371,111
Minimum [Member]        
Property, Plant and Equipment, Useful Life     3 years  
Maximum [Member]        
Property, Plant and Equipment, Useful Life     5 years