Description Of Business And Segment Reporting (Summary Of Results Of Operations For Principal Business Segment) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 222,744	$ 203,115	$ 139,060
Depreciation and amortization	(18,422)	(20,918)	(22,746)
General and administrative expense	(20,172)	(21,416)	(25,100)
Impairment of long-lived assets	0	(1,549)
Total costs and expenses	(234,775)	(231,598)	(180,853)
Segment operating income (loss)	$ (12,031)	(28,483)	(41,793)
Number of operating segments | segment	2
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 227,511	208,138	139,575
Costs and expenses	(200,948)	(192,738)	(133,522)
Depreciation and amortization	(17,711)	(19,846)	(21,514)
Total costs and expenses	(223,596)	(219,348)	(163,567)
Segment operating income (loss)	3,915	(11,210)	(23,992)
Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(4,767)	(5,023)	(515)
Costs and expenses	(4,767)	(5,023)	(515)
Cinema Exhibition [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Impairment of long-lived assets		(1,549)
Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	207,641	191,321	126,812
Costs and expenses	(192,185)	(183,791)	(123,416)
Depreciation and amortization	(11,335)	(13,351)	(14,422)
Total costs and expenses	(207,517)	(203,037)	(145,449)
Segment operating income (loss)	124	(11,716)	(18,637)
Cinema Exhibition [Member] | Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Costs and expenses	(4,767)	(5,023)	(515)
Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	19,870	16,817	12,763
Costs and expenses	(8,763)	(8,947)	(10,106)
Depreciation and amortization	(6,376)	(6,495)	(7,092)
Total costs and expenses	(16,079)	(16,311)	(18,118)
Segment operating income (loss)	3,791	506	(5,355)
Real Estate [Member] | Intersegment Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(4,767)	(5,023)	(515)
Segment [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
General and administrative expense	(4,937)	(5,215)	(8,531)
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	(3,997)	(4,346)	(7,611)
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	(940)	(869)	(920)
Third Party [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	222,744	203,115	139,060
Costs and expenses	(196,181)	(187,715)	(133,007)
Third Party [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	207,641	191,321	126,812
Costs and expenses	(187,418)	(178,768)	(122,901)
Third Party [Member] | Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	15,103	11,794	12,248
Costs and expenses	$ (8,763)	$ (8,947)	$ (10,106)