Note 8 - Segment and Geographic Data - Summary by Reporting and Operating Segments (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Product sales, net	$ 2,248,845	$ 2,597,598
Operating Income (Loss)	(1,465,068)	(1,342,676)
Depreciation and Amortization	11,684	17,220
Income (loss) before taxes and equity in earnings of affiliates	(1,440,529)	(1,319,331)
Total assets	11,350,786		$ 11,371,512
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Operating Income (Loss)	(1,599,150)	(1,162,683)
Depreciation and Amortization	11,684	15,084
Income (loss) before taxes and equity in earnings of affiliates	(1,573,108)	(1,136,732)
Total assets	5,656,220		6,159,532
Dental Segment [Member]
Product sales, net	2,241,425	2,591,398
Dental Segment [Member] | Operating Segments [Member]
Product sales, net	2,241,425	2,591,398
Operating Income (Loss)	625,510	641,940
Depreciation and Amortization	0	1,168
Income (loss) before taxes and equity in earnings of affiliates	624,512	641,169
Total assets	5,180,123		4,866,786
Medical Segment [Member]
Product sales, net	7,420	6,200
Medical Segment [Member] | Operating Segments [Member]
Product sales, net	7,420	6,200
Operating Income (Loss)	(491,428)	(821,933)
Depreciation and Amortization	0	968
Income (loss) before taxes and equity in earnings of affiliates	(491,933)	$ (823,768)
Total assets	$ 514,443		$ 345,194