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Note 1 - Basis of Presentation and Certain Significant Accounting Policies (Details Textual) - USD ($)
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Goodwill, Impairment Loss $ 0  
Goodwill, Foreign Currency Translation Gain (Loss) 7,651 $ 5,274
Amortization of Intangible Assets $ 1,331 $ 5,998
Maximum [Member]    
Sales Revenue, Annual Gross Product Returns 0.50%