LONG-TERM INVESTMENT - Summary of Long Term Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Long-Term Investments [Line Items]
Long-term investments (note 14)	$ 22,306	$ 17,459
Equity method investee:
Long-Term Investments [Line Items]
Long-term investments (note 14)	14,426	16,023
Equity method investee: | Ninebell
Long-Term Investments [Line Items]
Long-term investments (note 14)	5,476	5,199
Equity method investee: | Wooil
Long-Term Investments [Line Items]
Long-term investments (note 14)	1,004	1,011
Equity method investee: | Shengyi
Long-Term Investments [Line Items]
Long-term investments (note 14)	1,798	1,168
Equity method investee: | Hefei Shixi
Long-Term Investments [Line Items]
Long-term investments (note 14)	6,148	8,645
Investments accounted for using measurement alternative: | Shengyi
Long-Term Investments [Line Items]
Long-term investments (note 14)	846	0
Investments accounted for using measurement alternative: | Waferworks (Shanghai) Co., Ltd
Long-Term Investments [Line Items]
Long-term investments (note 14)	1,392	1,436
Investments accounted for using measurement alternative: | Other
Long-Term Investments [Line Items]
Long-term investments (note 14)	$ 5,642	$ 0