MAINLAND CHINA CONTRIBUTION PLAN - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
MAINLAND CHINA CONTRIBUTION PLAN
Contribution to employee benefits	$ 686	$ 1,056	$ 1,088

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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