Note 2 - Discontinued Operations - Schedule of Disposal Groups by Balance Sheet Classification (Details) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Total current assets of discontinued operations	$ 14,348	$ 1,261,403
Total assets of discontinued operations	0	202,337
Total current liabilities of discontinued operations	310,046	533,384
Discontinued Operations, Disposed of by Sale [Member] | Birmingham Laboratory and Eagan Business [Member]
Cash	0	122,851
Accounts receivable, net	0	746,266
Inventories	0	339,968
Prepaid expense and other assets	14,348	52,318
Total current assets of discontinued operations	14,348	1,261,403
Property and equipment, net	0	21,882
Intangibles, net	0	159,158
Lease right-of-use assets	0	17,266
Other long-term assets	0	4,031
Total assets of discontinued operations	14,348	1,463,740
Accounts payable	6,183	97,780
Accrued expenses and other liabilities	303,863	248,086
Contract liabilities	0	80,909
Lease liability	0	106,609
Total current liabilities of discontinued operations	310,046	533,384
Other long-term liabilities	0	23,487
Total liabilities	$ 310,046	$ 556,871