Note 2 - Discontinued Operations - Schedule of Disposal Groups Including Discontinued Operations (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Net (loss) from discontinued operations	$ (91,567)	$ (724,592)	$ (249,024)	$ (1,379,330)
Discontinued Operations, Disposed of by Sale [Member] | Birmingham Laboratory and Eagan Business [Member]
Revenue	0	211,467	157,179	626,255
Cost of sales	0	139,109	122,800	304,092
Gross profit (loss) from discontinued operations	0	72,358	34,379	322,163
General and administrative	101,103	291,813	204,341	593,223
Operations, research and development	2,669	334,699	125,495	806,807
Sales and marketing	0	150,234	130,318	281,259
Total operating expenses	103,772	776,746	460,154	1,681,289
Total operating (loss) from discontinued operations	(103,772)	(704,388)	(425,775)	(1,359,126)
Gain on disposal of discontinued operations	0	0	172,451	0
Other income (expense)	12,205	(20,204)	4,300	(20,204)
Net (loss) from discontinued operations	$ (91,567)	$ (724,592)	$ (249,024)	$ (1,379,330)