Document and Entity Information
| Document and Entity Information | Jan. 06, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 6, 2022 |
| Entity Registrant Name | ACM Research, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38273 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001680062 |
| Title of 12(b) Security | Class A Common Stock, par value $0.0001 per share |
| Trading Symbol | ACMR |
| Security Exchange Name | NASDAQ |