PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION, Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Cash Flows [Abstract]
Net cash used in operating activities	$ (40,093)	$ (13,547)	$ 9,403
Net cash provided by investing activities	(11,280)	(69,950)	(5,531)
Net cash provided by financing activities	538,766	32,834	87,445
Net increase (decrease) in cash and cash equivalents	491,301	(46,093)	90,735
Cash, cash equivalents and restricted cash at beginning of period	71,766	117,859	27,124
Effect of exchange rate changes on cash and cash equivalents	3,908	4,570	(582)
Cash, cash equivalents and restricted cash at end of period	563,067	71,766	117,859
Parent Company [Member]
Statement of Cash Flows [Abstract]
Net cash used in operating activities	(5,902)	(290)	(7,957)
Net cash provided by investing activities	0	0	0
Net cash provided by financing activities	5,250	2,745	23,347
Net increase (decrease) in cash and cash equivalents	(652)	2,455	15,390
Cash, cash equivalents and restricted cash at beginning of period	30,188	27,733	13,161
Effect of exchange rate changes on cash and cash equivalents	0	0	(818)
Cash, cash equivalents and restricted cash at end of period	$ 29,536	$ 30,188	$ 27,733

Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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