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The number of medical centers.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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Note 1 - Basis of Presentation (Details Textual)			3 Months Ended		6 Months Ended
Note 1 - Basis of Presentation (Details Textual)	May 07, 2024 USD ($)	Nov. 10, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 28, 2024	Jan. 01, 2024 USD ($)	Jan. 01, 2023 USD ($)	Apr. 27, 2022
Number of Medical Centers			10		10
Number of Reportable Segments					2
GKCE [Member]
Revenue from Contract with Customer, Including Assessed Tax			$ 3,157,000	$ 756,000	$ 4,120,000	$ 1,452,000
Accounts Receivable, after Allowance for Credit Loss			4,558,000	980,000	4,558,000	980,000		$ 1,626,000	$ 1,118,000
Rental Income from Medical Services [Member]
Revenue from Contract with Customer, Including Assessed Tax			3,899,000	4,812,000	8,152,000	9,041,000
PBRT Services [Member]
Revenue from Contract with Customer, Including Assessed Tax			$ 2,420,000	$ 2,545,000	$ 5,069,000	$ 4,859,000
Gamma Knife and PBRT Equipment [Member]
Number of Medical Centers			11		11
Lima, Peru and Guayaquil, Ecuador [Member]
Number of Single-unit Facilities			2		2
Single-Unit Radiation Therapy Facilities [Member]
Number of Single-unit Facilities	3
Newco Guadalajara [Member]
Equity Method Investment, Ownership Percentage							70.00%
Newco Guadalajara [Member] \| HSJ [Member]
Equity Method Investment, Ownership Percentage							30.00%
Newco [Member]
Equity Method Investment, Ownership Percentage										85.00%
Newco [Member] \| Guadalupe [Member]
Equity Method Investment, Ownership Percentage										15.00%
OR21, LLC [Member]
Equity Method Investment, Ownership Percentage			50.00%		50.00%
OR21, LLC [Member] \| Architectural Design Company [Member]
Equity Method Investment, Ownership Percentage			50.00%		50.00%
Southern New England Regional Cancer Center, LLC and Roger Williams Radiation Therapy, LLC [Member]
Number of Medical Centers			3		3
Business Combination, Consideration Transferred	$ 2,850,000	$ 2,850,000
Business Acquisition, Percentage of Voting Interests Acquired		60.00%
Accounts Receivable, after Allowance for Credit Loss	$ 919,000
RI Companies [Member]
Business Acquisition, Percentage of Voting Interests Acquired	60.00%
Number of Single-unit Facilities	3
RI Companies [Member] \| Minimum [Member]
Business Combination, Net Payment Terms (Day)	30 days
RI Companies [Member] \| Maximum [Member]
Business Combination, Net Payment Terms (Day)	60 days