LONG-TERM INVESTMENT - Summary of Long Term Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Long-Term Investments [Line Items]
Long-term investments (note 14)	$ 16,122	$ 17,459
Equity investee:
Long-Term Investments [Line Items]
Long-term investments (note 14)	13,286	16,023
Equity investee: | Ninebell
Long-Term Investments [Line Items]
Long-term investments (note 14)	4,673	5,199
Equity investee: | Wooil
Long-Term Investments [Line Items]
Long-term investments (note 14)	1,026	1,011
Equity investee: | Shengyi
Long-Term Investments [Line Items]
Long-term investments (note 14)	1,461	1,168
Equity investee: | Hefei Shixi
Long-Term Investments [Line Items]
Long-term investments (note 14)	6,126	8,645
Other investee: | Waferworks
Long-Term Investments [Line Items]
Long-term investments (note 14)	1,384	1,436
Other investee: | Other
Long-Term Investments [Line Items]
Long-term investments (note 14)	$ 1,452	$ 0