Segment Reporting (Summary Of Results Of Operations For Principal Business Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 52,170	$ 60,090	$ 152,716	$ 151,951
Depreciation and amortization	(3,236)	(3,926)	(9,992)	(12,142)
General and administrative expense	(4,658)	(4,933)	(15,194)	(15,626)
Total costs and expenses	(52,499)	(60,433)	(157,047)	(167,513)
Segment operating income (loss)	(329)	(343)	(4,331)	(15,562)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	53,122	61,255	155,805	155,414
Costs and expenses	(45,557)	(52,739)	(134,950)	(143,208)
Depreciation and amortization	(3,160)	(3,818)	(9,699)	(11,837)
General and administrative expense	(1,262)	(1,089)	(3,963)	(3,698)
Total costs and expenses	(49,979)	(57,646)	(148,612)	(158,743)
Segment operating income (loss)	3,143	3,609	7,193	(3,329)
Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(952)	(1,165)	(3,089)	(3,463)
Costs and expenses	(952)	(1,165)	(3,089)	(3,463)
Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	48,555	56,357	141,740	140,570
Costs and expenses	(43,694)	(50,633)	(129,292)	(136,407)
Depreciation and amortization	(2,045)	(2,608)	(6,358)	(7,753)
General and administrative expense	(1,060)	(903)	(3,358)	(2,973)
Total costs and expenses	(46,799)	(54,144)	(139,008)	(147,133)
Segment operating income (loss)	1,756	2,213	2,732	(6,563)
Cinema Exhibition [Member] | Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Costs and expenses	(952)	(1,165)	(3,089)	(3,463)
Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	4,567	4,898	14,065	14,844
Costs and expenses	(1,863)	(2,106)	(5,658)	(6,801)
Depreciation and amortization	(1,115)	(1,210)	(3,341)	(4,084)
General and administrative expense	(202)	(186)	(605)	(725)
Total costs and expenses	(3,180)	(3,502)	(9,604)	(11,610)
Segment operating income (loss)	1,387	1,396	4,461	3,234
Real Estate [Member] | Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(952)	(1,165)	(3,089)	(3,463)
Third Party [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	52,170	60,090	152,716	151,951
Costs and expenses	(44,605)	(51,574)	(131,861)	(139,745)
Third Party [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	48,555	56,357	141,740	140,570
Costs and expenses	(42,742)	(49,468)	(126,203)	(132,944)
Third Party [Member] | Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	3,615	3,733	10,976	11,381
Costs and expenses	$ (1,863)	$ (2,106)	$ (5,658)	$ (6,801)