SIGNIFICANT ACCOUNTING POLICIES, Land Use Rights, Net (Details)	9 Months Ended
Sep. 30, 2020
SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Right to use land lease term	50 years

Right to use land lease term, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	acmr_RightToUseLandLeaseTerm
Namespace Prefix:	acmr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration