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Note 1 - Summary of Significant Accounting Policies - Net Sales by Geographical Region (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Net Sales | $ 32,637,484 | $ 12,232,088
Reportable Geographical Components [Member] | US And Canada [Member] |  |
Net Sales | 1,600,298 | 922,245
Reportable Geographical Components [Member] | AUSTRALIA |  |
Net Sales | 425,560 | 597,214
Reportable Geographical Components [Member] | South America [Member] |  |
Net Sales |  | 49,861
Reportable Geographical Components [Member] | Asia [Member] |  |
Net Sales | 5,991,440 | 1,369,735
Reportable Geographical Components [Member] | Europe [Member] |  |
Net Sales | $ 24,620,186 | $ 9,293,033

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