Condensed Consolidated Statements of Cash Flows Supplemental Information - Write-downs (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Supplemental Cash Flow Elements [Line Items]
Theater system components written off in Costs and expenses	$ 300	$ 200
Write-downs for excess inventory	6	12
Maximum [Member] \| Technology Sales [Member]
Supplemental Cash Flow Elements [Line Items]
Write-downs for excess inventory	$ 100	$ 100

Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=116847112&loc=d3e4542-108314

Name:	us-gaap_InventoryWriteDown
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration