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Note 3 - Assets Measured at Fair Value (Details) - Fair Value, Measurements, Recurring [Member]
Jun. 30, 2016
USD ($)
Reported Value Measurement [Member]  
Derivative warrant liabilities $ 515,819
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]  
Derivative warrant liabilities
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]  
Derivative warrant liabilities
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]  
Derivative warrant liabilities 515,819
Estimate of Fair Value Measurement [Member]  
Derivative warrant liabilities $ 515,819