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Income Taxes - Tax Effect of Significant Temporary Differences (Details) - CTRS - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Income Taxes [Line Items] |  |
Income from unconsolidated joint ventures | $ 5 | $ 27
Federal and state tax net operating loss carryforwards | 1,636 | 1,163
Federal and state tax capital loss carryforwards | 179 | 570
Gross deferred tax asset | 1,820 | 1,760
Valuation allowance | (1,820) | (1,760)
Net deferred tax asset after valuation allowance | 0 | 0
Net deferred tax asset | $ 1,800 | $ 1,800

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