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Note 12 - Subsequent Event (Details Textual) - USD ($)
1 Months Ended
Apr. 30, 2017
Mar. 31, 2017
Mar. 23, 2017
Stock Issued During Period, Shares, Warrants Exercised   983,334  
Proceeds from Warrant Exercises   $ 49,167  
Subsequent Event [Member]      
Stock Issued During Period, Shares, Warrants Exercised 2,500,000   983,334
Proceeds from Warrant Exercises $ 100,000   $ 49,167