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Note O - Segment and Geographic Data - Summary of Operations by Geographic Area (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Product sales, net | $ 9,622,076 | $ 11,281,886
Domestic [Member] |  |
Product sales, net | 4,831,206 | 5,339,709
Domestic [Member] | Devices [Member] |  |
Product sales, net | 523,875 | 914,495
Domestic [Member] | Handpieces [Member] |  |
Product sales, net | 4,211,243 | 4,346,664
Domestic [Member] | Other Products [Member] |  |
Product sales, net | 96,088 | 78,550
Rest of World [Member] |  |
Product sales, net | 3,890,870 | 3,871,177
Rest of World [Member] | Devices [Member] |  |
Product sales, net | 1,373,844 | 1,427,016
Rest of World [Member] | Handpieces [Member] |  |
Product sales, net | 2,450,739 | 2,327,622
Rest of World [Member] | Other Products [Member] |  |
Product sales, net | 66,287 | 116,539
CHINA |  |
Product sales, net | 900,000 | 2,071,000
CHINA | Devices [Member] |  |
Product sales, net | 109,374 | 643,600
CHINA | Handpieces [Member] |  |
Product sales, net | 790,626 | 1,425,600
CHINA | Other Products [Member] |  |
Product sales, net |  | 1,800
Dental Segment [Member] |  |
Product sales, net | 9,502,276 | 11,279,886
Dental Segment [Member] | Domestic [Member] |  |
Product sales, net | 4,798,706 | 5,339,709
Dental Segment [Member] | Domestic [Member] | Devices [Member] |  |
Product sales, net | 491,375 | 914,495
Dental Segment [Member] | Domestic [Member] | Handpieces [Member] |  |
Product sales, net | 4,211,243 | 4,346,664
Dental Segment [Member] | Domestic [Member] | Other Products [Member] |  |
Product sales, net | 96,088 | 78,550
Dental Segment [Member] | Rest of World [Member] |  |
Product sales, net | 3,803,570 | 3,869,177
Dental Segment [Member] | Rest of World [Member] | Devices [Member] |  |
Product sales, net | 1,292,844 | 1,427,016
Dental Segment [Member] | Rest of World [Member] | Handpieces [Member] |  |
Product sales, net | 2,444,639 | 2,325,622
Dental Segment [Member] | Rest of World [Member] | Other Products [Member] |  |
Product sales, net | 66,087 | 116,539
Dental Segment [Member] | CHINA |  |
Product sales, net | 900,000 | 2,071,000
Dental Segment [Member] | CHINA | Devices [Member] |  |
Product sales, net | 109,374 | 643,600
Dental Segment [Member] | CHINA | Handpieces [Member] |  |
Product sales, net | 790,626 | 1,425,600
Dental Segment [Member] | CHINA | Other Products [Member] |  |
Product sales, net |  | 1,800
Medical Segment [Member] |  |
Product sales, net | 119,800 | 2,000
Medical Segment [Member] | Domestic [Member] |  |
Product sales, net | 32,500 |
Medical Segment [Member] | Domestic [Member] | Devices [Member] |  |
Product sales, net | 32,500 |
Medical Segment [Member] | Domestic [Member] | Handpieces [Member] |  |
Product sales, net |  |
Medical Segment [Member] | Domestic [Member] | Other Products [Member] |  |
Product sales, net |  |
Medical Segment [Member] | Rest of World [Member] |  |
Product sales, net | 87,300 | 2,000
Medical Segment [Member] | Rest of World [Member] | Devices [Member] |  |
Product sales, net | 81,000 |
Medical Segment [Member] | Rest of World [Member] | Handpieces [Member] |  |
Product sales, net | 6,100 | 2,000
Medical Segment [Member] | Rest of World [Member] | Other Products [Member] |  |
Product sales, net | 200 |
Medical Segment [Member] | CHINA |  |
Product sales, net |  |
Medical Segment [Member] | CHINA | Devices [Member] |  |
Product sales, net |  |
Medical Segment [Member] | CHINA | Handpieces [Member] |  |
Product sales, net |  |
Medical Segment [Member] | CHINA | Other Products [Member] |  |
Product sales, net |  |

X
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