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Note 1 - Business and Basis of Presentation (Details Textual)	Dec. 31, 2022	Apr. 27, 2022
Newco [Member]
Equity Method Investment, Ownership Percentage		85.00%
OR21, LLC [Member]
Equity Method Investment, Ownership Percentage	50.00%
Guadalupe [Member] | Newco [Member]
Equity Method Investment, Ownership Percentage		15.00%
Architectural Design Company [Member] | OR21, LLC [Member]
Equity Method Investment, Ownership Percentage	50.00%
Gamma Knife Center Ecuador S.A. (GKCE) [Member] | Gamma Knife Units [Member]
Number of Medical Centers	12

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The number of medical centers.

+ References

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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