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Note 10 - Related Party Transactions | 6 Months Ended
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Jun. 30, 2023
Notes to Financial Statements |
Related Party Transactions Disclosure [Text Block] | Note 10. Related Party Transactions The Company’s Gamma Knife business is operated through its 81% indirect interest in its GKF subsidiary. The remaining 19% of GKF is owned by a wholly owned U.S. subsidiary of Elekta, which is the manufacturer of the Gamma Knife. Since the Company purchases its Gamma Knife units from Elekta, there are significant related party transactions with Elekta, such as equipment purchases, commitments to purchase and service equipment, and costs to maintain the equipment. The following table summarizes related party activity for the three and six-month periods ended June 30, 2023 and 2022:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Equipment purchases and de-install costs |  | $ | 1,217,000 |  |  | $ | 131,000 |  |  | $ | 1,418,000 |  |  | $ | 1,363,000 |
Costs incurred to maintain equipment |  |  | 295,000 |  |  |  | 279,000 |  |  |  | 590,000 |  |  |  | 548,000 |
Total related party transactions |  | $ | 1,512,000 |  |  | $ | 410,000 |  |  | $ | 2,008,000 |  |  | $ | 1,911,000 |
The Company also had commitments to purchase or upgrade gamma knife units, purchase a LINAC and service the related equipment of $25,511,000 as of June 30, 2023. Related party liabilities on the condensed consolidated balance sheets consist of the following as of June 30, 2023 and December 31, 2022
|  | June 30, |  |  | December 31, |
|  | 2023 |  |  | 2022 |
Accounts payable, asset retirement obligation and other accrued liabilities |  | $ | 2,091,000 |  |  | $ | 857,000 |

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