Note 2 - Property and Equipment (Details Textual) - USD ($)	3 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Net Income (Loss) Attributable to Parent		$ (625,000)	$ 119,000
Earnings Per Share, Diluted (in dollars per share)		$ (0.1)	$ 0.02
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
Gamma Knife Units [Member]
Property, Plant, and Equipment, Salvage Value				$ 0
Gamma Knife Units [Member] | Salvage Value [Member]
Net Income (Loss) Attributable to Parent		$ (83,000)
Earnings Per Share, Diluted (in dollars per share)		$ 0.01
Gamma Knife Units [Member] | Salvage Value [Member] | Forecast [Member]
Net Income (Loss) Attributable to Parent	$ (10,000)
Earnings Per Share, Diluted (in dollars per share)	$ 0
PBRT Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)		20 years