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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Inventory (Details)	12 Months Ended
	Dec. 31, 2021
Inventory [Abstract]
Maximum shipment period of finished goods from warehouse	1 month

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- Definition

The maximum period in which finished goods typically are shipped from the warehouse in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

Name:	us-gaap_InventoryNetAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration