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Note 14 - Fair Value Measurement - Summary of the Fair Values of the Company's Derivative Instrument Liabilities (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Derivative instrument asset $ 573,378 $ 172,888
Fair Value, Inputs, Level 1 [Member]    
Derivative instrument asset
Fair Value, Inputs, Level 2 [Member]    
Derivative instrument asset 573,378 172,888
Fair Value, Inputs, Level 3 [Member]    
Derivative instrument asset