Note 8 - Segment and Geographic Data - Summary by Reporting and Operating Segments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Product sales, net	$ 2,059,284	$ 2,215,699	$ 7,566,848	$ 6,564,969
Operating Income (Loss)	(1,506,705)	(2,013,495)	(5,126,933)	(6,812,856)
Depreciation and Amortization	15,896	16,661	49,798	50,121
Income (loss) before taxes and equity in earnings of affiliates:	(1,476,105)	(1,985,483)	(5,024,264)	(6,786,037)
Total assets	10,583,558		10,583,558		$ 13,702,086
Dental Segment [Member]
Product sales, net	2,053,284	2,206,499	7,556,848	6,509,619
Medical Segment [Member]
Product sales, net	6,000	9,200	10,000	55,350
Operating Segments [Member] | Dental Segment [Member]
Product sales, net	2,053,284	2,206,499	7,556,848	6,509,619
Operating Income (Loss)	458,474	308,913	1,699,349	826,175
Depreciation and Amortization	1,051	951	3,439	2,737
Income (loss) before taxes and equity in earnings of affiliates:	458,504	307,699	1,698,790	822,270
Total assets	5,338,522		5,338,522		3,875,978
Operating Segments [Member] | Medical Segment [Member]
Product sales, net	6,000	9,200	10,000	55,350
Operating Income (Loss)	(740,087)	(937,468)	(2,425,913)	(3,788,842)
Depreciation and Amortization	585	1,019	2,247	3,056
Income (loss) before taxes and equity in earnings of affiliates:	(742,004)	(938,963)	(2,431,502)	(3,793,236)
Total assets	498,113		498,113		620,373
Corporate, Non-Segment [Member]
Operating Income (Loss)	(1,225,092)	(1,384,940)	(4,400,369)	(3,850,189)
Depreciation and Amortization	14,260	14,691	44,112	44,328
Income (loss) before taxes and equity in earnings of affiliates:	(1,192,605)	$ (1,354,219)	(4,291,552)	$ (3,815,071)
Total assets	$ 4,746,923		$ 4,746,923		$ 9,205,735