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OTHER LONG-TERM ASSETS (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Other Long-term Assets [Abstract] |  |
Prepayment for property | $ 39,474 | $ 39,450
Security deposit for land use right | 750 | 756
Others | 251 | 290
Total other long-term assets | 40,475 | $ 40,496
Capitalized interest charges related to property | $ 317 |

X
- Definition Amount of property related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed after one year or the normal operating cycle, if longer. + References No definition available. + Details
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Namespace Prefix: | acmr_
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Balance Type: | debit
Period Type: | instant

X
- Definition Amount of security deposit for land use right paid in advance. + References No definition available. + Details
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Namespace Prefix: | acmr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of interest capitalized during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
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X
- Definition Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer. + References No definition available. + Details
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X
- Definition Amount of noncurrent assets classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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