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Prepaid And Other Assets (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2009 | Feb. 05, 2007
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Prepaid And Other Assets [Abstract] |  |  |  |
Prepaid expenses | $ 1,185,000 | $ 1,946,000 |  |
Prepaid taxes | 1,929,000 | 455,000 |  |
Income taxes receivable | 52,000 | 5,572,000 |  |
Prepaid rent | 1,438,000 | 162,000 |  |
Deposits | 244,000 | 245,000 |  |
Investment in marketable securities | 23,000 | 26,000 |  |
Total prepaid and other current assets | 4,871,000 | 8,406,000 |  |
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 asset | 4,477,000 | 6,050,000 |  |
Long-term deposits | 12,000 | 8,000 |  |
Total other non-current assets | $ 6,461,000 | $ 8,030,000 |  |

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