Note 2 - Property and Equipment (Details Textual)	9 Months Ended
	Sep. 30, 2022 USD ($)
Non-US [Member]
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization, Total	$ 2,320,000
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