Note O - Segment and Geographic Data - Summary of Operations by Geographic Area (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Product sales, net	$ 11,281,886	$ 10,482,005
Domestic [Member]
Product sales, net	5,339,709	3,352,561
Rest of World [Member]
Product sales, net	3,871,177	3,703,844
CHINA
Product sales, net	2,071,000	3,425,600
Dental Segment [Member]
Product sales, net	11,279,886	10,460,752
Dental Segment [Member] | Domestic [Member]
Product sales, net	5,339,709	3,331,308
Dental Segment [Member] | Rest of World [Member]
Product sales, net	3,869,177	3,703,844
Dental Segment [Member] | CHINA
Product sales, net	2,071,000	3,425,600
Medical Segment [Member]
Product sales, net	2,000	21,253
Medical Segment [Member] | Domestic [Member]
Product sales, net
Medical Segment [Member] | Rest of World [Member]
Product sales, net	$ 2,000	$ 21,253