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Note 4 - Real Property - Components of Other Income, Net (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Lease revenue | $ 583 | $ 620 | $ 1,699 | $ 1,780
Property operating expenses | (360) | (410) | (1,083) | (1,032)
Other income, net | $ 223 | $ 210 | $ 616 | $ 748

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