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Note 15 - Summary of the Fair Values of the Company's Derivative Instrument Liabilities (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Fair Value, Inputs, Level 1 [Member]    
Derivative instrument asset
Derivative instrument liability
Fair Value, Inputs, Level 2 [Member]    
Derivative instrument asset 73,617
Derivative instrument liability (294,170) (2,027,086)
Fair Value, Inputs, Level 3 [Member]    
Derivative instrument asset
Derivative instrument liability
Derivative instrument asset 73,617
Derivative instrument liability $ (294,170) $ (2,027,086)