Segment Reporting (Summary Of Cinema Exhibition Segment Revenue To Segment Operating Income) (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)
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
Operating expense	(39,612)	(44,107)
Depreciation and amortization	(3,243)	(4,104)
General and administrative expense	(1,275)	(1,268)
Operating income (loss)	(2,881)	(3,275)
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
Occupancy expense	(3,967)	(5,787)
Labor cost	(4,082)	(4,148)
Utilities	(1,218)	(1,308)
Cleaning and maintenance	(1,541)	(1,427)
Other operating expenses	(2,146)	(2,124)
Operating expense	(37,657)	(41,872)
Depreciation and amortization	(2,141)	(2,587)
General and administrative expense	(1,081)	(977)
Depreciation, amortization, general and administrative expense	(3,222)	(3,564)
Operating income (loss)	(4,475)	(4,165)
Film Rent And Advertising Cost [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(5,058)	(6,139)
Food and Beverage [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(1,583)	(1,907)
United States [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	18,295	21,308
Operating expense	(19,595)	(22,840)
Depreciation and amortization	(1,121)	(1,271)
General and administrative expense	(725)	(633)
Depreciation, amortization, general and administrative expense	(1,846)	(1,904)
Operating income (loss)	(3,146)	(3,436)
United States [Member] | Admissions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	10,245	12,245
United States [Member] | Concessions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	6,108	6,960
United States [Member] | Advertising And Other [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	1,942	2,103
Australia [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	15,682	17,322
Occupancy expense	(4,295)	(4,402)
Labor cost	(3,307)	(3,273)
Utilities	(842)	(812)
Cleaning and maintenance	(1,149)	(1,204)
Other operating expenses	(775)	(872)
Operating expense	(15,399)	(16,286)
Depreciation and amortization	(913)	(1,190)
General and administrative expense	(344)	(344)
Depreciation, amortization, general and administrative expense	(1,257)	(1,534)
Operating income (loss)	(974)	(498)
Australia [Member] | Admissions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	9,630	10,261
Australia [Member] | Concessions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	4,856	5,765
Australia [Member] | Film Rent And Advertising Cost [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(3,956)	(4,448)
Australia [Member] | Food and Beverage [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(1,075)	(1,275)
Australia [Member] | Advertising And Other [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	1,196	1,296
New Zealand [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	2,427	2,641
Occupancy expense	(733)	(759)
Labor cost	(534)	(562)
Utilities	(98)	(100)
Cleaning and maintenance	(194)	(204)
Other operating expenses	(307)	(235)
Operating expense	(2,663)	(2,746)
Depreciation and amortization	(107)	(126)
General and administrative expense	(12)
Depreciation, amortization, general and administrative expense	(119)	(126)
Operating income (loss)	(355)	(231)
New Zealand [Member] | Admissions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	1,546	1,600
New Zealand [Member] | Concessions [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	766	909
New Zealand [Member] | Film Rent And Advertising Cost [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(649)	(682)
New Zealand [Member] | Food and Beverage [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating expense	(148)	(204)
New Zealand [Member] | Advertising And Other [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	$ 115	$ 132