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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Components of Accumulated Other Comprehensive Income (Loss)

The following table presents the components of accumulated other comprehensive income (loss) as of December 31, 2018, 2019 and 2020:

		Year Ended December 31, 2018												Year Ended December 31, 2019												Year Ended December 31, 2020
		US$												US$												US$
		Foreign currency items				Defined benefit pension plans				Accumulated other comprehensive income (loss)				Foreign currency items				Defined benefit pension plans				Accumulated other comprehensive income (loss)				Foreign currency items				Defined benefit pension plans				Accumulated other comprehensive income (loss)
Beginning balance			3,321				(678	)			2,643				1,173				(678	)			495				(92	)			(693	)			(785	)
Current-period change			(2,148	)			—				(2,148	)			(1,265	)			(15	)			(1,280	)			497				(61	)			436
Ending balance			1,173				(678	)			495				(92	)			(693	)			(785	)			405				(754	)			(349	)

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- Definition

Tabular disclosure of the components of accumulated other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900

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