Prepaid And Other Assets (Summary Of Prepaid And Other Assets) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Feb. 05, 2007
Prepaid And Other Assets [Abstract]
Prepaid expenses	$ 1,761,000	$ 1,625,000
Prepaid taxes	646,000	653,000
Income taxes receivable	2,704,000	1,686,000
Prepaid rent	930,000	1,055,000
Deposits	242,000	243,000
Restricted cash	1,342,000	17,000
Investment in marketable securities	42,000	46,000
Total prepaid and other current assets	7,667,000	5,325,000
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	$ 1,500,000
Straight-line rent asset	4,150,000	3,103,000
Long-term deposits	7,000	7,000
Total non-current assets	$ 6,129,000	$ 5,082,000