CUSTOMER AND SUPPLIER CONCENTRATION - SUPPLIER CONCENTRATION RISK (Details) - Cost of goods sold - Supplier concentration risk - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Supplier one
Concentration Risk
Concentration Risk, Percentage	16.00%	35.00%
Accounts payable (prepayment)	$ (1,185)	$ 5,749
Supplier two
Concentration Risk
Concentration Risk, Percentage	11.00%	13.00%
Accounts payable (prepayment)	$ 15,330	$ 2,013
Supplier three
Concentration Risk
Concentration Risk, Percentage	4.00%	11.00%
Accounts payable (prepayment)	$ (805)	$ (22)