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Note M - Segment and Geographic Data - Summary by Reporting and Operating Segments (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Product sales, net | $ 8,374,501 | $ 9,622,076
Operating Income (Loss) | (3,998,993) | (7,999,335)
Depreciation and Amortization | 100,508 | 881,285
Income (loss) before taxes and equity in earnings of affiliates | (7,643,438) | (7,999,120)
Dental | 6,556,289 | 6,400,968
Total loss before taxes and equity in earnings of affiliate | 6,556,289 | 6,400,968
Corporate, Non-Segment [Member] |  |
Operating Income (Loss) | (4,424,606) | (6,761,282)
Depreciation and Amortization | 76,323 | 840,319
Income (loss) before taxes and equity in earnings of affiliates | (8,064,576) | (6,658,152)
Dental | 957,238 | 902,816
Total loss before taxes and equity in earnings of affiliate | 957,238 | 902,816
Dental Segment [Member] |  |
Product sales, net | 8,336,901 | 9,502,276
Dental Segment [Member] | Operating Segments [Member] |  |
Product sales, net | 8,336,901 | 9,502,276
Operating Income (Loss) | 2,775,716 | 1,373,178
Depreciation and Amortization | 15,793 | 16,474
Income (loss) before taxes and equity in earnings of affiliates | 2,774,332 | 1,363,662
Dental | 5,008,324 | 5,169,944
Total loss before taxes and equity in earnings of affiliate | 5,008,324 | 5,169,944
Medical Segment [Member] |  |
Product sales, net | 37,600 | 119,800
Medical Segment [Member] | Operating Segments [Member] |  |
Product sales, net | 37,600 | 119,800
Operating Income (Loss) | (2,350,103) | (2,611,231)
Depreciation and Amortization | 8,392 | 24,492
Income (loss) before taxes and equity in earnings of affiliates | (2,353,194) | (2,704,630)
Dental | 590,727 | 328,208
Total loss before taxes and equity in earnings of affiliate | $ 590,727 | $ 328,208

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