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Note 1 - Basis of Presentation and Certain Significant Accounting Policies (Details Textual) - USD ($)
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Goodwill, Impairment Loss $ 0  
Goodwill, Foreign Currency Translation Gain (Loss) 3,596 $ 6,512
Amortization of Intangible Assets $ 886 $ 5,054
Maximum [Member]    
Sales Revenue, Annual Gross Product Returns 0.50%