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Short-Term Bank Loans	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Short-Term Bank Loans	10. SHORT-TERM BANK LOANS The Company obtained US dollar bank revolver credit facilities and drew down $50,000 thousand in 2020. The loan was repaid in 2020. Interest rate was 0.78% per annum on the outstanding monthly balance. The interest expenses for the years ended December 31, 2019, 2020 and 2021 were nil, US$11 thousand and nil, respectively.

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- Definition

The entire disclosure for short-term debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-URI http://asc.fasb.org/topic&trid=2208564

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