Note 5 - GKCE Acquisition - Tangible Assets Acquired (Details) - USD ($)		12 Months Ended
	Jun. 12, 2020	Dec. 31, 2021
Building [Member]
Useful life (Year)		20 years
Gamma Knife Center Ecuador S.A. (GKCE) [Member]
Tangible assets	$ 723,000
Gamma Knife Center Ecuador S.A. (GKCE) [Member] | Building [Member]
Tangible assets	$ 385,000
Useful life (Year)	20 years
Gamma Knife Center Ecuador S.A. (GKCE) [Member] | Land [Member]
Tangible assets	$ 19,000
Gamma Knife Center Ecuador S.A. (GKCE) [Member] | Medical Equipment [Member]
Tangible assets	$ 302,000
Useful life (Year)	2 years
Gamma Knife Center Ecuador S.A. (GKCE) [Member] | Property, Plant and Equipment, Other Types [Member]
Tangible assets	$ 17,000
Useful life (Year)	2 years