REVENUE - Schedule of Components of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Schedule of revenue [Line Items]
Revenue	$ 39,516	$ 50,465
Service revenue
Schedule of revenue [Line Items]
Revenue	37,763	48,080
Non-controlling interests
Schedule of revenue [Line Items]
Revenue	$ 161	$ 372

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details