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PROPERTY, PLANT AND EQUIPMENT, NET - Narrative (Details) ¥ in Thousands, $ in Thousands			1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 05, 2026 USD ($) m²	Jun. 05, 2026 CNY (¥) m²	May 31, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	May 31, 2026 CNY (¥)	Dec. 31, 2025 USD ($)
Property, Plant, and Equipment [Line Items]
Depreciation				$ 6,219	$ 3,517	$ 11,380	$ 5,904
Payments to acquire property, plant, and equipment						87,311	$ 31,458
Property cost				434,737		434,737			$ 353,594
Bank of China
Property, Plant, and Equipment [Line Items]
Line of credit facility, maximum borrowing capacity			$ 33,987					¥ 231,518
Line of credit facility, interest rate during period			2.65%
Debt instrument, term			120 months
Facility In Shanghai Pudong New Area
Property, Plant, and Equipment [Line Items]
Area of land \| m²	3,196	3,196
Payments to acquire property, plant, and equipment	$ 45,904	¥ 312,699
ACM Research ( Lingang), Inc. ("ACM Lingang") \| Land, Buildings, And Plants
Property, Plant, and Equipment [Line Items]
Property cost				$ 36,663		$ 36,663