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Prepaid And Other Assets (Details) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2009 | Feb. 05, 2007
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Prepaid And Other Assets [Abstract] |  |  |  |
Prepaid expenses | $ 1,859,000 | $ 1,185,000 |  |
Prepaid taxes | 1,687,000 | 1,929,000 |  |
Income taxes receivable |  | 52,000 |  |
Prepaid rent |  | 1,438,000 |  |
Deposits | 233,000 | 244,000 |  |
Interest receivable | 8,000 |  |  |
Investment in marketable securities | 17,000 | 23,000 |  |
Total prepaid and other current assets | 3,804,000 | 4,871,000 |  |
Other non-cinema and non-rental real estate assets | 1,134,000 | 1,134,000 |  |
Investment in Reading International Trust I | 838,000 | 838,000 | $ 838,000 | $ 1,500,000
Straight-line rent asset | 8,302,000 | 4,477,000 |  |
Long-term deposits | 10,000 | 12,000 |  |
Total other non-current assets | $ 10,284,000 | $ 6,461,000 |  |

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