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Note 6 - Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2019
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Foreign Currency Items |  |  | Total Accumulated Other Comprehensive Income |
Beginning balance as of January 1, 2019 |  | $ | (6,050,347 | ) |  | $ | (6,050,347 | )
Current period change, net of tax |  |  | 235,876 |  |  |  | 235,876 |
Ending Balance as of March 31, 2019 |  |  | (5,814,471 | ) |  |  | (5,814,471 | )

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