BANK BORROWINGS - Schedule of Bank Borrowings (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Bank Borrowing [Roll Forward]
Beginning balance					$ 13,335	$ 13,301	$ 13,156	$ 12,184
Proceeds from bank borrowings	$ 13,466	$ 13,158	$ 13,466	$ 26,603
Repayments of principal	(17,332)	0	(17,332)	(12,265)
Exchange difference	(662)	144	(628)	(64)
Ending balance	$ 8,807	$ 26,458	$ 8,807	$ 26,458