Prepaid And Other Assets (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2009	Feb. 05, 2007
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