SHORT-TERM INVESTMENTS - Narrative (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2025 CNY (¥)	Dec. 31, 2024 CNY (¥)	Feb. 29, 2024 USD ($)	Feb. 29, 2024 CNY (¥)	Sep. 30, 2023 USD ($)	Dec. 31, 2021 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Proceeds from sale of short-term investments (note 12)	$ 2,147	$ 8,434	$ 21,735
Realized gain from sale of short-term investments	166	1,788	9,047
Zhongjuxin Limited Company (“Zhongjuxin”)
Debt and Equity Securities, FV-NI [Line Items]
Investment in partnership								$ 4,179
Sale of investment, amount receivable	2,147	5,267		¥ 15,089	¥ 38,464
Shanghai Syncrystalline Silicon Materials Co., Ltd
Debt and Equity Securities, FV-NI [Line Items]
Investment in partnership	2,846			¥ 20,000		$ 1,423	¥ 10,000		$ 1,423
SMIC
Debt and Equity Securities, FV-NI [Line Items]
Proceeds from sale of short-term investments (note 12)	2,147	8,434	21,735
Realized gain from sale of short-term investments	$ 166	$ 1,788	$ 9,047