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Note 10 - Segment and Geographic Data - Summary by Reporting and Operating Segments (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Product sales, net | $ 1,811,386 | $ 1,915,909 |
Operating Income (Loss) | (1,608,606) | (818,181) |
Depreciation and Amortization | 37,219 | 26,045 |
Income (loss) before taxes and equity in earnings of affiliates | (1,612,703) | (779,166) |
Dental | 6,374,601 |  | $ 6,556,289
Total assets | 6,374,601 |  | 6,556,289
Corporate, Non-Segment [Member] |  |  |
Operating Income (Loss) | (1,515,178) | (818,464) |
Depreciation and Amortization | 27,808 | 19,512 |
Income (loss) before taxes and equity in earnings of affiliates | (1,515,178) | (779,765) |
Dental | 1,774,678 |  | 957,238
Total assets | 1,774,678 |  | 957,238
Dental Segment [Member] |  |  |
Product sales, net | 1,803,586 | 1,915,509 |
Dental Segment [Member] | Operating Segments [Member] |  |  |
Product sales, net | 1,803,586 | 1,915,509 |
Operating Income (Loss) | 576,386 | 491,966 |
Depreciation and Amortization | 5,699 | 3,936 |
Income (loss) before taxes and equity in earnings of affiliates | 572,289 | 492,985 |
Dental | 4,017,592 |  | 5,008,324
Total assets | 4,017,592 |  | 5,008,324
Medical Segment [Member] |  |  |
Product sales, net | 7,800 | 400 |
Medical Segment [Member] | Operating Segments [Member] |  |  |
Product sales, net | 7,800 | 400 |
Operating Income (Loss) | (669,814) | (491,683) |
Depreciation and Amortization | 3,712 | 2,597 |
Income (loss) before taxes and equity in earnings of affiliates | (669,814) | $ (492,386) |
Dental | 582,331 |  | 590,727
Total assets | $ 582,331 |  | $ 590,727

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