Segment Reporting (Summary Of Cinema Exhibition Segment Revenue To Segment Operating Income) (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)
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
Operating expense	(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)
Operating income (loss)	3,143	3,609	7,193	(3,329)
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
Operating expense	(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)
Depreciation, amortization, general and administrative expense	(3,105)	(3,511)	(9,716)	(10,726)
Operating income (loss)	1,756	2,213	2,732	(6,563)
United States [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	25,122	27,816	73,676	70,601
Occupancy expense	(4,112)	(5,198)	(12,499)	(17,530)
Labor cost	(4,184)	(4,657)	(12,477)	(12,807)
Utilities	(1,657)	(1,957)	(4,207)	(4,602)
Cleaning and maintenance	(1,751)	(1,914)	(5,046)	(4,998)
Other operating expenses	(1,872)	(1,860)	(6,339)	(6,078)
Operating expense	(23,477)	(27,001)	(69,149)	(73,757)
Depreciation and amortization	(1,043)	(1,259)	(3,321)	(3,784)
General and administrative expense	(674)	(513)	(2,130)	(1,885)
Depreciation, amortization, general and administrative expense	(1,717)	(1,772)	(5,451)	(5,669)
Operating income (loss)	(72)	(957)	(924)	(8,825)
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	13,784	15,445	40,128	39,368
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	9,276	9,824	26,659	24,237
United States [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	(7,557)	(8,783)	(21,723)	(21,192)
United States [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	(2,344)	(2,632)	(6,858)	(6,550)
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	2,062	2,547	6,889	6,996
Australia [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	20,512	24,745	59,103	60,612
Occupancy expense	(4,415)	(4,673)	(13,221)	(13,612)
Labor cost	(3,377)	(3,794)	(10,108)	(10,510)
Utilities	(815)	(719)	(2,308)	(2,171)
Cleaning and maintenance	(1,163)	(1,352)	(3,466)	(3,728)
Other operating expenses	(903)	(966)	(2,477)	(2,747)
Operating expense	(17,485)	(20,201)	(51,540)	(53,569)
Depreciation and amortization	(895)	(1,237)	(2,714)	(3,619)
General and administrative expense	(314)	(389)	(1,086)	(1,087)
Depreciation, amortization, general and administrative expense	(1,209)	(1,626)	(3,800)	(4,706)
Operating income (loss)	1,818	2,918	3,763	2,337
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	12,396	14,445	36,301	35,559
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	6,459	8,691	18,528	20,805
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	(5,484)	(6,775)	(16,026)	(16,170)
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	(1,328)	(1,922)	(3,934)	(4,631)
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	1,657	1,609	4,274	4,248
New Zealand [Member] | Cinema Exhibition [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenue	2,921	3,796	8,961	9,357
Occupancy expense	(746)	(804)	(2,216)	(2,347)
Labor cost	(504)	(631)	(1,617)	(1,786)
Utilities	(173)	(114)	(407)	(311)
Cleaning and maintenance	(182)	(256)	(572)	(650)
Other operating expenses	(165)	(305)	(624)	(802)
Operating expense	(2,732)	(3,431)	(8,603)	(9,081)
Depreciation and amortization	(107)	(112)	(323)	(350)
General and administrative expense	(72)	(1)	(142)	(1)
Depreciation, amortization, general and administrative expense	(179)	(113)	(465)	(351)
Operating income (loss)	10	252	(107)	(75)
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	1,836	2,215	5,718	5,559
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	906	1,339	2,807	3,262
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	(803)	(1,048)	(2,592)	(2,482)
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	(159)	(273)	(575)	(703)
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	$ 179	$ 242	$ 436	$ 536