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Note 4 - Real Property and Other Income, Expense - Components of Other Income, Net (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Lease revenue | $ 533 | $ 1,244 | $ 2,283
Property operating expenses | (736) | (833) | (1,376)
Other income (loss), net | $ (203) | $ 411 | $ 907

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