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Note 5 - Intangible Assets, net (Tables) | 12 Months Ended
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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 |

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