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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