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Note O - Segment and Geographic Data - Summary by Reporting and Operating Segments (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Product sales, net | $ 9,622,076 | $ 11,281,886
Operating Income (Loss) | (7,999,335) | (5,234,318)
Depreciation and Amortization | 881,285 | 573,150
Income (loss) before taxes and equity in earnings of affiliates | (7,999,120) | (5,229,950)
Assets | 6,400,968 | 15,628,787
Corporate, Non-Segment [Member] |  |
Operating Income (Loss) | (6,761,282) | (5,972,743)
Depreciation and Amortization | 840,319 | 528,895
Income (loss) before taxes and equity in earnings of affiliates | (6,658,152) | (5,975,035)
Assets | 902,816 | 4,718,130
Dental Segment [Member] |  |
Product sales, net | 9,502,276 | 11,279,886
Dental Segment [Member] | Operating Segments [Member] |  |
Product sales, net | 9,502,276 | 11,279,886
Operating Income (Loss) | 1,373,178 | 3,127,570
Depreciation and Amortization | 16,474 | 17,305
Income (loss) before taxes and equity in earnings of affiliates | 1,363,662 | 3,136,167
Assets | 5,169,944 | 10,255,144
Medical Segment [Member] |  |
Product sales, net | 119,800 | 2,000
Medical Segment [Member] | Operating Segments [Member] |  |
Product sales, net | 119,800 | 2,000
Operating Income (Loss) | (2,611,231) | (2,389,145)
Depreciation and Amortization | 24,492 | 26,950
Income (loss) before taxes and equity in earnings of affiliates | (2,704,630) | (2,391,082)
Assets | $ 328,208 | $ 655,513

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