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INCOME TAXES - Narrative (Details)
$ in Thousands
3 Months Ended 9 Months Ended 36 Months Ended
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
subsidiary
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Income Taxes [Abstract]          
Federal statutory income tax rate     21.00%    
Income tax expense $ 718 $ 10,470 $ 11,235 $ 14,138  
Capitalized contract cost, amortization period 15 years   15 years    
Unrecognized tax benefits $ 8,448   $ 8,448   $ 8,448
Unrecognized tax benefits that would impact effective tax rate $ 6,178   6,178   $ 6,178
Interest or penalties     $ 853 $ 142  
Number of subsidiaries | subsidiary     4    
ACM Research (Shanghai), Inc.          
Income Taxes [Abstract]          
Foreign corporate tax rate     15.00%    
Foreign Tax Authority          
Income Taxes [Abstract]          
Foreign corporate tax rate     25.00%    
Effective period of preferential income tax rate     3 years    
Foreign Tax Authority | Minimum          
Income Taxes [Abstract]          
Foreign corporate tax rate     15.00%    
Foreign Tax Authority | Maximum          
Income Taxes [Abstract]          
Foreign corporate tax rate     25.00%    
Foreign Tax Authority | ACM Research (Shanghai), Inc.          
Income Taxes [Abstract]          
Foreign corporate tax rate         12.50%
Foreign Tax Authority | ACM Research (Shanghai), Inc. | Minimum          
Income Taxes [Abstract]          
Foreign corporate tax rate     15.00%    
Foreign Tax Authority | ACM Research (Wuxi), Inc.          
Income Taxes [Abstract]          
Foreign corporate tax rate     25.00%    
Foreign Tax Authority | ACM Research (Beijing), Inc.          
Income Taxes [Abstract]          
Foreign corporate tax rate     25.00%    
Foreign Tax Authority | ACM Research (Lingang), Inc. (1)          
Income Taxes [Abstract]          
Foreign corporate tax rate     15.00%