CUSTOMER AND SUPPLIER CONCENTRATION - CUSTOMER CONCENTRATION RISK (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Concentration Risk
Accounts receivable	$ 29,573	$ 20,869
Revenue | Customer concentration risk | Customer one
Concentration Risk
Concentration risk (as a percent)	11.00%	13.00%
Accounts receivable	$ 3,245	$ 3,536
Revenue | Customer concentration risk | Customer two
Concentration Risk
Concentration risk (as a percent)	4.00%	9.00%
Accounts receivable	$ 1,223	$ 2,598