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Note 15 - Intangible (Details Textual)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]    
Amortization period of intangible assets of definite useful life 5 years 5 years
Amortization rate of intangible assets of definite useful life 20.00% 20.00%