SEGMENT INFORMATION (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) Segment	Dec. 31, 2022 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Segment	1
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	$ 178,500	$ 144,321
Mainland China
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	164,540	140,481
South Korea
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	12,721	3,830
United States
Geographic Areas, Long-Lived Assets [Abstract]
Long-lived assets	$ 1,239	$ 10