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Note 8 - Segment and Geographic Data - Summary by Reporting and Operating Segments (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Product sales, net | $ 2,909,966 | $ 1,648,368 | $ 5,507,564 | $ 4,349,270 |
Operating Income (Loss) | (2,277,550) | (2,884,879) | (3,620,226) | (4,799,361) |
Depreciation and Amortization | 16,681 | 16,645 | 33,902 | 33,460 |
Income (loss) before taxes and equity in earnings of affiliates: | (2,228,828) | (2,881,329) | (3,548,159) | (4,800,554) |
Total assets | 11,151,452 | 13,702,086 | 11,151,452 | 13,702,086 | $ 13,702,086
Dental Segment [Member] |  |  |  |  |
Product sales, net | 2,912,166 | 1,609,768 | 5,503,564 | 4,303,120 |
Medical Segment [Member] |  |  |  |  |
Product sales, net | (2,200) | 38,600 | 4,000 | 46,150 |
Operating Segments [Member] | Dental Segment [Member] |  |  |  |  |
Product sales, net | 2,912,166 | 1,609,768 | 5,503,564 | 4,303,120 |
Operating Income (Loss) | 598,944 | 163,022 | 1,240,884 | 517,262 |
Depreciation and Amortization | 1,219 | 893 | 2,388 | 1,786 |
Income (loss) before taxes and equity in earnings of affiliates: | 599,126 | 161,774 | 1,240,295 | 514,571 |
Total assets | 4,439,751 | 3,875,978 | 4,439,751 | 3,875,978 |
Operating Segments [Member] | Medical Segment [Member] |  |  |  |  |
Product sales, net | (2,200) | 38,600 | 4,000 | 46,150 |
Operating Income (Loss) | (863,899) | (1,615,283) | (1,685,832) | (2,851,374) |
Depreciation and Amortization | 694 | 1,019 | 1,662 | 2,037 |
Income (loss) before taxes and equity in earnings of affiliates: | (865,735) | (1,616,733) | (1,689,503) | (2,854,273) |
Total assets | 452,974 | 620,373 | 452,974 | 620,373 |
Corporate, Non-Segment [Member] |  |  |  |  |
Operating Income (Loss) | (2,012,595) | (1,432,618) | (3,175,278) | (2,465,249) |
Depreciation and Amortization | 14,768 | 14,733 | 29,852 | 29,637 |
Income (loss) before taxes and equity in earnings of affiliates: | (1,962,219) | (1,426,370) | (3,098,951) | (2,460,852) |
Total assets | $ 6,258,727 | $ 9,205,735 | $ 6,258,727 | $ 9,205,735 |

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