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Note 11 - Segment and Geographic Data - Summary by Reporting and Operating Segments (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Product sales, net | $ 2,924,707 | $ 1,811,386 |
Operating Income (Loss) | (984,373) | (1,608,606) |
Depreciation and Amortization | 20,924 | 37,219 |
Income (loss) before taxes and equity in earnings of affiliates | (986,908) | (1,612,703) |
Total assets | 22,641,033 |  | $ 19,571,450
Corporate, Non-Segment [Member] |  |  |
Operating Income (Loss) | (1,214,661) | (1,515,178) |
Depreciation and Amortization | 15,367 | 27,808 |
Income (loss) before taxes and equity in earnings of affiliates | (1,215,011) | (1,515,178) |
Total assets | 14,667,467 |  | 12,612,147
Dental Segment [Member] |  |  |
Product sales, net | 2,856,658 | 1,803,586 |
Dental Segment [Member] | Operating Segments [Member] |  |  |
Product sales, net | 2,853,657 | 1,803,586 |
Operating Income (Loss) | 1,126,069 | 576,386 |
Depreciation and Amortization | 1,706 | 5,699 |
Income (loss) before taxes and equity in earnings of affiliates | 1,125,154 | 572,289 |
Total assets | 6,954,380 |  | 6,035,645
Medical Segment [Member] |  |  |
Product sales, net | 71,050 | 7,800 |
Medical Segment [Member] | Operating Segments [Member] |  |  |
Product sales, net | 71,050 | 7,800 |
Operating Income (Loss) | (895,781) | (669,814) |
Depreciation and Amortization | 3,851 | 3,712 |
Income (loss) before taxes and equity in earnings of affiliates | (897,051) | $ (669,814) |
Total assets | $ 1,019,186 |  | $ 923,658

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