XML 51 R39.htm IDEA: XBRL DOCUMENT
v3.21.1

LEASES (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
LEASES [Abstract] |
Components of Lease Expense | The components of lease expense were as follows:
|  | Three Months Ended March 31, |
|  | 2021 |  |  | 2020 |
Operating lease cost |  | $ | 515 |  |  | $ | 377 |
Short-term lease cost |  |  | 79 |  |  |  | 50 |
Lease cost |  | $ | 594 |  |  | $ | 427 |
Supplemental Cash Flow Information Related to Operating Leases | Supplemental cash flow information related to operating leases was as follows for the three months ended March 31, 2021 and 2020:
|  | Three Months Ended March 31, |
|  | 2021 |  |  | 2020 |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |
Operating cash outflow from operating leases |  | $ | 594 |  |  | $ | 427 |
Maturities of Lease Liabilities for Operating Leases | Maturities of lease liabilities for all operating leases were as follows as of March 31, 2021:
|  | December 31, |
2021 |  | $ | 1,834 |
2022 |  |  | 2,439 |
2023 |  |  | 978 |
2024 |  |  | 876 |
2025 |  |  | 22 |
Total lease payments |  |  | 6,149 |
Less: Interest |  |  | (800 | )
Present value of lease liabilities |  | $ | 5,349 |
Weighted Average Remaining Lease Terms and Discount Rates for Operating Leases | The weighted average remaining lease terms and discount rates for all operating leases were as follows as of March 31, 2021 and December 31, 2020:
|  | March 31, 2021 |  |  | December 31, 2020 |
Remaining lease term and discount rate: |  |  |  |  |  |
Weighted average remaining lease term (years) |  |  | 1.93 |  |  |  | 2.11 |
Weighted average discount rate |  |  | 4.87 | % |  |  | 5.14 | %

X
- Definition Tabular disclosure of lessee's operating lease supplemental cash flow information. + References No definition available. + Details
Name: | acmr_LesseeOperatingLeaseSupplementalCashFlowInformationRelatedToOperatingLeasTableTextBlock
Namespace Prefix: | acmr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of weighted average remaining lease terms and discount rates for operating leases. + References No definition available. + Details
Name: | acmr_LesseeOperatingLeaseWeightedAverageRemainingLeaseTermAndDiscountRateTableTextBlock
Namespace Prefix: | acmr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
Name: | us-gaap_LeaseCostTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration