Segment Reporting (Summary Of Results Of Operations For Principal Business Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 40,169	$ 45,052
Depreciation and amortization	(3,375)	(4,205)
General and administrative expense	(5,153)	(5,423)
Total costs and expenses	(47,060)	(52,583)
Segment operating income (loss)	(6,891)	(7,531)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	41,249	46,204
Costs and expenses	(39,612)	(44,107)
Depreciation and amortization	(3,243)	(4,104)
General and administrative expense	(1,275)	(1,268)
Total costs and expenses	(44,130)	(49,479)
Segment operating income (loss)	(2,881)	(3,275)
Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(1,080)	(1,152)
Costs and expenses	(1,080)	(1,152)
Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	36,404	41,271
Costs and expenses	(37,657)	(41,872)
Depreciation and amortization	(2,141)	(2,587)
General and administrative expense	(1,081)	(977)
Total costs and expenses	(40,879)	(45,436)
Segment operating income (loss)	(4,475)	(4,165)
Cinema Exhibition [Member] | Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Costs and expenses	(1,080)	(1,152)
Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	4,845	4,933
Costs and expenses	(1,955)	(2,235)
Depreciation and amortization	(1,102)	(1,517)
General and administrative expense	(194)	(291)
Total costs and expenses	(3,251)	(4,043)
Segment operating income (loss)	1,594	890
Real Estate [Member] | Inter-segment Elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	(1,080)	(1,152)
Third Party [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	40,169	45,052
Costs and expenses	(38,532)	(42,955)
Third Party [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	36,404	41,271
Costs and expenses	(36,577)	(40,720)
Third Party [Member] | Real Estate [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	3,765	3,781
Costs and expenses	$ (1,955)	$ (2,235)