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v3.23.2

Note 1 - Basis of Presentation (Details Textual) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) | Apr. 27, 2022
Number of Reportable Segments |  |  | 2 |  |  |
GKCE [Member] |  |  |  |  |  |
Accounts Receivable, after Allowance for Credit Loss | $ 652,000 |  | $ 652,000 |  | $ 862,000 |
Newco [Member] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 85.00%
OR21, LLC [Member] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  | 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% |  | 50.00% |  |  |
Gamma Knife Center Ecuador S.A. (GKCE) [Member] | Gamma Knife Units [Member] |  |  |  |  |  |
Number of Medical Centers | 12 |  | 12 |  |  |
Rental Income from Medical Services [Member] |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 4,812,000 | $ 4,140,000 | $ 9,041,000 | $ 8,281,000 |  |
PBRT Services [Member] |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | 2,545,000 | 2,308,000 | 4,859,000 | 4,347,000 |  |
Patient Income [Member] |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 756,000 | $ 894,000 | $ 1,452,000 | $ 1,600,000 |  |
Gamma Knife and PBRT Equipment [Member] |  |  |  |  |  |
Number of Medical Centers | 13 |  | 13 |  |  |
Lima, Peru and Guayaquil, Ecuador [Member] |  |  |  |  |  |
Number of Single-unit Facilities | 2 |  | 2 |  |  |

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