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Note 10 - Deferred Revenues (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2016
Dec. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Note 10 - Deferred Revenues (Details) [Line Items]        
Recognition of Deferred Revenue     $ 0  
Price Increase Settlement [Member]        
Note 10 - Deferred Revenues (Details) [Line Items]        
Deferred Revenue, Additions $ 679,935      
Deferred Revenue, Revenue Recognized   $ 70,000 $ 73,302 $ 470,288
Recognition of Deferred Revenue       $ 73,302