Description Of Business And Segment Reporting (Summary Of Results Of Operations For Principal Business Segment) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 203,115	$ 139,060	$ 77,862	$ 276,800
Depreciation and amortization	(20,918)	(22,746)	(22,317)
General and administrative expense	(21,416)	(25,100)	(16,998)
Impairment of long-lived assets	(1,549)		(217)
Total costs and expenses	(231,598)	(180,853)	(139,175)
Segment operating income (loss)	$ (28,483)	(41,793)	(61,313)
Number of operating segments | segment	2
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 208,138	139,575	79,977
Costs and expenses	(192,738)	(133,522)	(101,758)
Depreciation and amortization	(19,846)	(21,514)	(21,347)
Total costs and expenses	(219,348)	(163,567)	(127,496)
Segment operating income (loss)	(11,210)	(23,992)	(47,519)
Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(5,023)	(515)	(2,115)
Costs and expenses	(5,023)	(515)	(2,115)
Cinema Exhibition [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Impairment of long-lived assets	(1,549)		(217)
Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	191,321	126,812	67,014
Costs and expenses	(183,791)	(123,416)	(93,180)
Depreciation and amortization	(13,351)	(14,422)	(15,246)
Total costs and expenses	(203,037)	(145,449)	(112,070)
Segment operating income (loss)	(11,716)	(18,637)	(45,056)
Cinema Exhibition [Member] | Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Costs and expenses	(5,023)	(515)	(2,115)
Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	16,817	12,763	12,963
Costs and expenses	(8,947)	(10,106)	(8,578)
Depreciation and amortization	(6,495)	(7,092)	(6,101)
Total costs and expenses	(16,311)	(18,118)	(15,426)
Segment operating income (loss)	506	(5,355)	(2,463)
Real Estate [Member] | Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(5,023)	(515)	(2,115)
Segment [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
General and administrative expense	(5,215)	(8,531)	(4,174)
Segment [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
General and administrative expense	(4,346)	(7,611)	(3,427)
Segment [Member] | Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
General and administrative expense	(869)	(920)	(747)
Third Party [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	203,115	139,060	77,862
Costs and expenses	(187,715)	(133,007)	(99,643)
Third Party [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	191,321	126,812	67,014
Costs and expenses	(178,768)	(122,901)	(91,065)
Third Party [Member] | Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	11,794	12,248	10,848
Costs and expenses	$ (8,947)	$ (10,106)	$ (8,578)