Note 3 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Sales revenue	$ 7,516	$ 9,116	$ 14,035	$ 44,665
Sales Revenue [Member]
Sales revenue	7,516	0	14,035	0
License [Member]
Sales revenue	0	9,116	0	44,665
Diagnostics Segment [Member] | License [Member]
Sales revenue		9,116		44,665
Diagnostics Segment [Member] | Europe [Member] | Sales Revenue [Member]
Sales revenue	7,516	0	14,035	0
Diagnostics Segment [Member] | Europe [Member] | License [Member]
Sales revenue	$ 0	$ 9,116	$ 0	$ 44,665