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Note 6 - Prepaid Expenses and Other Receivables (Tables) | 3 Months Ended
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Mar. 31, 2019
Other Income and Expenses [Abstract] |
Schedule of Other Current Assets [Table Text Block] | Prepaid Expenses and Other Receivables consisted of the following at March 31, 2019 and December 31, 2018:
|  | March 31, 201 9 |  |  | December 31, 201 8 |
Prepaid expenses |  | $ | 42,626 |  |  | $ | 96,197 |
Other receivables |  |  | 38,248 |  |  |  | 9,615 |
Total |  | $ | 80,874 |  |  | $ | 105,812 |

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- Definition Tabular disclosure of the carrying amounts of other current assets. + References No definition available. + Details
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