Note 8 - Segment and Geographic Data - Summary by Reporting and Operating Segments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Product sales, net	$ 2,513,805	$ 2,059,284	$ 6,616,414	$ 7,566,848
Operating Income (Loss)	(1,469,179)	(1,506,705)	(4,714,670)	(5,126,933)
Depreciation and Amortization	8,574	15,896	28,735	49,798
Income (loss) before taxes and equity in earnings of affiliates	(1,461,171)	(1,476,105)	(2,678,062)	(5,024,264)
Total income (loss) before taxes and equity in earnings of affiliates	(1,461,171)	(1,476,105)	(2,678,062)	(5,024,264)
Total assets	11,174,918	11,371,512	11,174,918	11,371,512	$ 11,371,512
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Operating Income (Loss)	(1,818,051)	(1,225,092)	(4,862,553)	(4,400,369)
Depreciation and Amortization	8,574	14,260	28,735	44,112
Income (loss) before taxes and equity in earnings of affiliates	(1,810,049)	(1,192,605)	(2,824,695)	(4,291,552)
Total income (loss) before taxes and equity in earnings of affiliates	(1,810,049)	(1,192,605)	(2,824,695)	(4,291,552)
Total assets	5,426,114	6,159,532	5,426,114	6,159,532
Dental Segment [Member]
Product sales, net	2,466,405	2,053,284	6,542,594	7,556,848
Dental Segment [Member] | Operating Segments [Member]
Product sales, net	2,466,405	2,053,284	6,542,594	7,556,848
Operating Income (Loss)	705,427	458,474	1,524,177	1,699,349
Depreciation and Amortization	0	1,051	0	3,439
Income (loss) before taxes and equity in earnings of affiliates	705,433	458,504	1,523,209	1,698,790
Total income (loss) before taxes and equity in earnings of affiliates	705,433	458,504	1,523,209	1,698,790
Total assets	5,528,106	4,866,786	5,528,106	4,866,786
Medical Segment [Member]
Product sales, net	47,400	6,000	73,820	10,000
Medical Segment [Member] | Operating Segments [Member]
Product sales, net	47,400	6,000	73,820	10,000
Operating Income (Loss)	(356,555)	(740,087)	(1,376,294)	(2,425,913)
Depreciation and Amortization	0	585	0	2,247
Income (loss) before taxes and equity in earnings of affiliates	(356,555)	(742,004)	(1,376,576)	(2,431,502)
Total income (loss) before taxes and equity in earnings of affiliates	(356,555)	(742,004)	(1,376,576)	(2,431,502)
Total assets	$ 220,698	$ 345,194	$ 220,698	$ 345,194