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LONG-TERM INVESTMENT - Narrative (Details) ¥ in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 CNY (¥)
Investments [Abstract]
Equity income in net income of affiliates	$ 3,920	$ 472	$ 3,888	$ 401
Dividends from unconsolidated affiliates	5,095		5,095	$ 0
Equity Investment \| Ninebell
Investments [Abstract]
Equity method investments	$ 1,200		$ 1,200
Equity Investment \| Ninebell \| Class A Common Stock
Investments [Abstract]
Ownership percentage	20.00%		20.00%		20.00%
Equity Investment \| Wooil
Investments [Abstract]
Equity method investments	$ 1,000		$ 1,000
Equity Investment \| Wooil \| Class A Common Stock
Investments [Abstract]
Ownership percentage	20.00%		20.00%		20.00%
Equity Investment \| Shengyi
Investments [Abstract]
Equity method investments	$ 109		$ 109
Equity Investment \| Shengyi \| Class A Common Stock
Investments [Abstract]
Ownership percentage	15.00%		15.00%		15.00%
Equity Investment \| Hefei Shixi
Investments [Abstract]
Equity method investments	$ 4,200		$ 4,200		¥ 30,000
Equity Investment \| Hefei Shixi \| Class A Common Stock
Investments [Abstract]
Ownership percentage	10.00%		10.00%		10.00%
Equity Investment \| Waferworks
Investments [Abstract]
Equity method investments	$ 1,568		$ 1,568
Equity Investment \| Waferworks \| Class A Common Stock
Investments [Abstract]
Ownership percentage	0.25%		0.25%		0.25%