Description Of Business And Segment Reporting (Summary Of Results Of Operations For Principal Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 51,196	$ 31,803	$ 155,908	$ 89,142
Segment operating income (loss)	(6,731)	(10,951)	(20,080)	(37,461)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	51,197	31,803	155,908	89,142
Segment operating income (loss)	(2,282)	(6,542)	(6,027)	(24,587)
Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(1,232)	(125)	(3,833)	(386)
Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	48,359	28,751	147,476	79,580
Segment operating income (loss)	(2,137)	(5,057)	(5,902)	(20,680)
Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	4,070	3,177	12,265	9,948
Segment operating income (loss)	$ (145)	$ (1,485)	$ (125)	$ (3,907)