XML 13 R1.htm IDEA: XBRL DOCUMENT v3.21.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2021
May 04, 2021
Document Information [Line Items]    
Entity Registrant Name ACM Research, Inc.  
Entity Central Index Key 0001680062  
Current Fiscal Year End Date --12-31  
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q1  
Document Transition Report false  
Entity File Number 001-38273  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 94-3290283  
Entity Address, Address Line One 42307 Osgood Road, Suite I  
Entity Address, City or Town Fremont  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94539  
City Area Code 510  
Local Phone Number 445-3700  
Title of 12(b) Security Class A Common Stock, $0.0001 par value  
Trading Symbol ACMR  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Class A Common Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   17,268,562
Class B Common Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   1,714,272