Name:	acmr_AmortizationOfLandUseRightDueNextTwelveMonths
Namespace Prefix:	acmr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of annual amortization expense for land use right, expected to be recognized in fifth fiscal year following current fiscal year.

No definition available.

Name:	acmr_AmortizationOfLandUseRightDueYearFive
Namespace Prefix:	acmr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of annual amortization expense for land use right, expected to be recognized in third fiscal year following current fiscal year.

No definition available.

Name:	acmr_AmortizationOfLandUseRightDueYearThree
Namespace Prefix:	acmr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of annual amortization expense for land use right, expected to be recognized in second fiscal year following current fiscal year.

No definition available.

Name:	acmr_AmortizationOfLandUseRightDueYearTwo
Namespace Prefix:	acmr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

Name:	acmr_AnnualAmortizationOfLandUseRightAbstract
Namespace Prefix:	acmr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of annual amortization expense for land use right, expected to be recognized in fourth fiscal year following current fiscal year.

No definition available.

Name:	acmr_AnnualAmortizationOfLandUseRightDueYearFour
Namespace Prefix:	acmr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The construction project for a new project for the development and production center that will incorporate new manufacturing systems and automation technologies, and will provide floor space to support significantly increase production capacity and related research and development activities.

No definition available.

Name:	acmr_AreaOfSquareFootForDevelopmentAndProductionCenter
Namespace Prefix:	acmr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

Name:	acmr_LandUseRightAbstract
Namespace Prefix:	acmr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of accumulated amortization on land use right.

No definition available.

Name:	acmr_LandUseRightAccumulatedAmortization
Namespace Prefix:	acmr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Land use right represents the cost to purchase land use right.

No definition available.

Name:	acmr_LandUseRightNet
Namespace Prefix:	acmr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The carrying amount as of the balance sheet date of land not owned but under a contract in which the entity has an option to purchase the land.

No definition available.

Name:	acmr_LandUseRightPurchaseAmount
Namespace Prefix:	acmr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585