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The Company and its Significant Accounting Policies - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
The Company and its Significant Accounting Policies
Amount of cash insured	$ 94,000	$ 8,400,000
Excess of the federal deposit insurance corporation	250,000
China
The Company and its Significant Accounting Policies
Cash uninsured	1,100,000	700,000
Singapore
The Company and its Significant Accounting Policies
Cash uninsured	132,000	168,000
Hong Kong
The Company and its Significant Accounting Policies
Cash uninsured	40,000	$ 63,000
United Kingdom
The Company and its Significant Accounting Policies
Cash uninsured	$ 1,100,000

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.14)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

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