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Note 5 - Intangible Assets, net (Tables)
12 Months Ended
Dec. 31, 2018
Disclosure Text Block [Abstract]  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Intangible assets consisted of the following as of December 31, 2018 and 2017:

   

2018

   

2017

 
                 

eCommerce platform

  $ -     $ 1,208,200  

Customer relationship

    6,150,559       6,150,559  

Trademarks

    200,000       200,000  

Less: accumulated amortization

    (2,554,655

)

    (3,356,151

)

    $ 3,795,904     $ 4,202,608  
Finite-lived Intangible Assets Amortization Expense [Table Text Block]
Estimated amortization expense relating to the existing intangible assets with finite lives for each of the next five years is as follows:

12 months ending December 31,

       

2019

  $ 406,704  

2020

    406,704  

2021

    406,704  

2022

    406,704  

2023

    406,704