Note 2 - Property and Equipment (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Income (Loss) Attributable to Parent	$ 188,000	$ 269,000
Earnings Per Share, Diluted (in dollars per share)	$ 0.03	$ 0.04
Salvage Value [Member]
Net Income (Loss) Attributable to Parent	$ (50,000)
Earnings Per Share, Diluted (in dollars per share)	$ 0.01
Medical and Office Equipment [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Medical and Office Equipment [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
PBRT Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	20 years