Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted average shares of common stock outstanding used in computing per share amounts (note 2): Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Cash and Cash Equivalents Cash and Cash Equivalents, Unrestricted Cash and Cash Equivalents, Policy [Policy Text Block] Title of 12(b) Security Title of 12(b) Security Net income available to common stockholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Proceeds from businesses and interest in affiliates, financing activities, net of tax Proceeds From (Payments For) Businesses and Interest in Affiliates, Financing Activities, Net Of Tax Proceeds From (Payments For) Businesses and Interest in Affiliates, Financing Activities, Net Of Tax Common stock Common Stock, Value, Issued Accrued payroll Employee-related Liabilities, Current Schedule of Long-Term Borrowings Schedule of Long-Term Debt Instruments [Table Text Block] ACM Research (Lingang), Inc. ("ACM Lingang") ACM Research ( Lingang), Inc. ("ACM Lingang") [Member] ACM Research ( Lingang), Inc. ("ACM Lingang") Restatement Determination Date Restatement Determination Date Inventory write-down Inventory Write-down Beginning balance Ending balance Accounts Receivable, Allowance for Credit Loss Long-Term Investments [Abstract] Long-Term Investments [Abstract] Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Current liabilities: Liabilities, Current [Abstract] Shares converted (in shares) Conversion of Stock, Shares Converted Provision for credit losses Provision for credit losses Accounts Receivable, Credit Loss Expense (Reversal) Inventory [Axis] Inventory [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Deposit Assets [Line Items] Deposit Assets [Line Items] Deposit Assets 2030 and thereafter Long-Term Debt, Maturity, After Four and Thereafter Long-Term Debt, Maturity, After Four and Thereafter Schedule of Debt Securities, Available-for-Sale Debt Securities, Available-for-Sale [Table Text Block] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, after Allowance for Credit Loss Consolidated Entities [Domain] Consolidated Entities [Domain] RELATED PARTY BALANCES AND TRANSACTIONS Related Party Transactions Disclosure [Text Block] Cash payments for procurement of goods and services Payments to Suppliers and Employees Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Property, Plant, and Equipment [Abstract] Property, Plant, and Equipment [Abstract] Entity Address, State or Province Entity Address, State or Province Options granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Foreign currency translation adjustment, net of tax of nil Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Assets Assets, Fair Value Disclosure [Abstract] Stock-based Compensation Expense [Abstract] Share-Based Payment Arrangement, Noncash Expense [Abstract] Basic (in shares) Weighted average shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Purchases of materials Related Party Transaction, Purchases from Related Party Schedule of Related Party Balances and Transactions Schedule of Related Party Transactions [Table Text Block] Long-term investments (note 10) Total long-term investments Long-Term Investments Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Work-in-process Inventory, Work in Process, Net of Reserves Deferred revenue Increase (Decrease) in Deferred Revenue Concentration Risk [Table] Concentration Risk [Table] Comprehensive income: Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Entity Address, City or Town Entity Address, City or Town Equity instruments other than options granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] ACCOUNTS RECEIVABLE, NET Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Receivables [Abstract] Receivables [Abstract] ACM Research (Beijing), Inc. ("ACM Beijing") ACM Research (Beijing), Inc. [Member] Entity owned or controlled by another entity. Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Document Information [Line Items] Document Information [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Class of Stock [Axis] Class of Stock [Axis] Intangible assets, net Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net income available to common stockholders, basic Net Income (Loss) Available to Common Stockholders, Basic Income Taxes [Line Items] Income Taxes [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Current portion of long-term borrowings (note 9) Less: Current portion Long-Term Debt, Current Maturities Revenue Benchmark Revenue Benchmark [Member] United States UNITED STATES Reconciliation of cash, cash equivalents and restricted cash in consolidated statements of cash flows: Reconciliation of cash, cash equivalents and restricted cash in condensed consolidated statements of cash flows: [Abstract] Reconciliation of cash, cash equivalents and restricted cash in condensed consolidated statements of cash flows: [Abstract] ACM Research (Chengdu), Inc. ("ACM Chengdu") ACM Research (Chengdu), Inc. [Member] ACM Research (Chengdu), Inc. Concentration Risk Type [Axis] Concentration Risk Type [Axis] STATUTORY SURPLUS RESERVE Statutory Surplus Reserve [Text Block] The entire disclosure for statutory surplus reserve. Cash, cash equivalents and restricted cash and time deposits Cash, Cash Equivalents and Restricted Cash and Time Deposits Amount of currency on hand as well as time deposits current and non current with banks or financial institutions. Recently issued accounting pronouncements not yet adopted New Accounting Pronouncements, Policy [Policy Text Block] Basic and Diluted Net Income per Share of Common Stock Earnings Per Share, Policy [Policy Text Block] Purchases of property, plant and equipment through other payables and accrued expenses Capital Expenditures Incurred but Not yet Paid Land Land [Member] Advances from customers Increase (Decrease) in Contract with Customer, Liability Grantee Status [Axis] Grantee Status [Axis] Non-controlling Interests Noncontrolling Interest [Member] Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] ACM Research (Cayman), Inc. ACM Research (Cayman), Inc. [Member] Entity owned or controlled by another entity. Two Customers Two Customers [Member] Information by number of customers. Tracy Liu [Member] Tracy Liu Long-term debt Long-term debt Long-Term Debt Three Customers Three Customers [Member] Information by number of customers. PROPERTY, PLANT AND EQUIPMENT, NET Property, Plant, and Equipment [Text Block] Non-cash investing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Income taxes payable Increase (Decrease) in Income Taxes Payable Document Period End Date Document Period End Date Net changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Unrecognized tax benefits Unrecognized Tax Benefits Annual total taxes, percentage Annual Total Taxes, Percentage Annual Total Taxes, Percentage COMMON STOCK Equity [Text Block] Security Exchange Name Security Exchange Name Debt instrument, term Debt Instrument, Term Time Deposits Time Deposits [Policy Text Block] Disclosure of accounting policy for time deposits. Capital contribution by non-controlling shareholder Proceeds from Noncontrolling Interests Area of land Area of Land SHORT-TERM INVESTMENTS Trading Securities [Text Block] The entire disclosure for trading securities. Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Class B Common Stock Common Stock Class B Common Class B [Member] Cash and Cash Equivalent [Abstract] Cash and Cash Equivalent [Abstract] Singapore SINGAPORE Current portion of operating lease liabilities Operating Lease, Liability, Current Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Schedule of Product Warranty Liability Schedule of Product Warranty Liability [Table Text Block] Schedule of Property, Plant, and Equipment Property, Plant, and Equipment [Table Text Block] Name Outstanding Recovery, Individual Name Number of outstanding legal proceedings Number of Outstanding Legal Proceedings Number of outstanding legal proceeding regarding securities class action. Utilized Standard Product Warranty Accrual, Decrease for Payments Net income attributable to ACM Research, Inc. per share of common stock (note 2): Net income per share of common stock: Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Short-term investments Debt Securities, Trading, and Equity Securities, FV-NI Total liabilities Liabilities Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] ACM-Wooil Microelectronics (Shanghai) Co., Ltd. ACM-Wooli Microelectronics (Shanghai) Co., Ltd [Member] ACM-Wooli Microelectronics (Shanghai) Co., Ltd Purchases of property and equipment Payments to acquire property, plant, and equipment Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Disaggregated Revenue Information [Abstract] Disaggregated Revenue Information [Abstract] Disaggregated Revenue Information [Abstract] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Income taxes payable (note 15) Accrued Income Taxes, Current Company Selected Measure Name Company Selected Measure Name ACM Shanghai dividends Payments of dividends to noncontrolling interest Payments of Ordinary Dividends, Noncontrolling Interest Number of votes for each share entitled Voting Rights per Common Share Number of votes entitled for each share of common stock. Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Refund of deposit for land use right Payments for (Proceeds from) Deposits on Real Estate Acquisitions Unrealized gain on available-for-sale investments, net of tax Unrealized gain on available-for-sale investments, net of tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Bills payable, term Bills Payable, Term Bills Payable, Term Concentration Risk [Line Items] Concentration Risk [Line Items] Hanguk ACM CO., LTD Hanguk ACM CO., LTD. [Member] Entity owned or controlled by another entity. China Everbright Bank China Everbright Bank [Member] China Everbright Bank Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Related Party Transactions [Abstract] Related Party Transactions [Abstract] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Other receivables Advances to related parties Other Receivables, Net, Current Geographic Areas, Long-Lived Assets [Abstract] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Long-Lived Asset [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (in shares) Weighted average shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Line of Credit Facility [Table] Line of Credit Facility [Table] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Accounts Receivable [Abstract] Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] Single Wafer Cleaning, Tahoe and Semi-Critical Cleaning Equipment Total Single Wafer and Semi-Critical Cleaning Equipment [Member] Goods and Services produced, developed and distributed by the entity. Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Short-term borrowings (note 7) Short-Term Debt Other long-term assets Increase (Decrease) in Other Noncurrent Assets Gross profit Gross Profit Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Effect of dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Payable for investments Payments For Investments Payments For Investments Award Timing Predetermined Award Timing Predetermined [Flag] Restricted cash Restricted cash Restricted Cash, Current Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Grantee Status [Domain] Grantee Status [Domain] 2016 Omnibus Incentive Plan 2016 Omnibus Incentive Plan [Member] 2016 Omnibus Incentive Plan Fair Value Measurement Fair Value of Financial Instruments, Policy [Policy Text Block] Incremental common shares attributable to dilutive effect of share-based payment arrangements (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Transfer of prepayment for property to property, plant, and equipment Transfer Of Prepayment For Property To Property Plant And Equipment Transfer Of Prepayment For Property To Property Plant And Equipment Industrial and Commercial Bank of China Industrial and Commercial Bank of China [Member] Industrial and Commercial Bank of China Interest or penalties Income Tax Examination, Penalties and Interest Expense Inventory, Current [Table] Inventory, Current [Table] All Executive Categories All Executive Categories [Member] Operating lease liabilities Increase (Decrease) in Operating Lease Liability Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Realized gain on short-term investments (note 11) Marketable Security, Realized Gain (Loss) Long-term debt, fair value Long-Term Debt, Fair Value Depreciation Depreciation Plan Name [Domain] Plan Name [Domain] Sales and marketing Selling and Marketing Expense Operating lease right-of-use assets, net Operating Lease, Right-of-Use Asset Concentration Risk Type [Domain] Concentration Risk Type [Domain] Cost Debt Securities, Trading, Amortized Cost Schedule of Basic and Diluted Net Income per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Risk-free interest rate maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Debt Disclosure [Abstract] Debt Disclosure [Abstract] SEGMENT INFORMATION Segment Reporting [Text Block] Statutory Surplus Reserve Retained Earnings, Appropriated [Member] Minimum Minimum [Member] Payments of dividends Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Balance at beginning of period Balance at end of period Standard Product Warranty Accrual Schedule of Disaggregated Revenue Information Disaggregation of Revenue [Table Text Block] Effect of exchange rate changes on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Nonrelated Party Nonrelated Party [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Proceeds from Issuance of ACM Research shares, net of issuance costs Proceeds from Issuance of Common Stock Sale of ACM Shanghai shares, net of tax (note 1) Adjustments To Additional Paid In Capital, Increase From Sale Of Stock Adjustments To Additional Paid In Capital, Increase From Sale Of Stock Common stock, shares authorized (in shares) Common Stock, Shares Authorized Number of shares issued in transaction (in shares) Sale of Stock, Number of Shares Issued in Transaction LONG-TERM INVESTMENTS Long-term investment [Text Block] The entire disclosure for long-term investment. Exercise Price Award Exercise Price Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Related Party Transaction [Axis] Related Party Transaction [Axis] Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Capitalized contract cost, amortization period Capitalized Contract Cost, Amortization Period Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Shengyi Semiconductor Technology Co., Ltd. ("Shengyi") Shengyi Semiconductor Technology Company Limited [Member] Name of the companies components suppliers. China CITIC Bank CITIC Bank [Member] CITIC Bank Lender Name [Axis] Lender Name [Axis] Schedule of Long-Lived Assets by Geography Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Long-Lived Asset [Table Text Block] Repayments of long-term borrowings Repayments of Long-Term Debt Contractual obligation Contractual Obligation Ninebell Ninebell Co., Ltd [Member] Name of related party. Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity method investments Equity Method Investments Other receivables Increase (Decrease) in Other Receivables Statutory Accounting Practices [Table] Statutory Accounting Practices [Table] CleanChip Technologies Limited ("CleanChip") CleanChip Technologies Limited [Member] Entity owned or controlled by another entity. Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Net proceeds received on sale of stock Sale of Stock, Consideration Received on Transaction Adoption Date Trading Arrangement Adoption Date Effective interest held as at Subsidiaries Ownership Percentage The percentage of ownership of common stock or equity participation of subsidiaries. Counterparty Name [Domain] Counterparty Name [Domain] Total ACM Research, Inc. stockholders’ equity Equity, Attributable to Parent Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Facility In Shanghai Pudong New Area Facility In Shanghai Pudong New Area [Member] Facility In Shanghai Pudong New Area Insider Trading Policies and Procedures [Line Items] OTHER PAYABLES AND ACCRUED EXPENSES Accounts Payable and Accrued Liabilities Disclosure [Text Block] Less: Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Transfer from inventories to property, plant and equipment Transfer From Inventory To Property, Plant And Equipment Transfer From Inventory To Property, Plant And Equipment Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Deferred income taxes Deferred Income Tax Expense (Benefit) STATUTORY SURPLUS RESERVE [Abstract] STATUTORY SURPLUS RESERVE [Abstract] STATUTORY SURPLUS RESERVE [Abstract] Capital contribution by non-controlling shareholder Noncontrolling Interest, Increase from Subsidiary Equity Issuance COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of operating segments Number of Operating Segments Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] ACM Research Korea CO., LTD. ("ACM Korea") ACM Research Korea CO., LTD [Member] Entity owned or controlled by another entity. Entity Central Index Key Entity Central Index Key Foreign corporate tax rate Foreign corporate tax rate Percentage of foreign tax rate. Rental Fee Charged Rental Fee Charged [Member] Rental Fee Charged Less: Accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Net proceeds from issuance of ACM Shanghai shares Proceeds from Issuance of Private Placement Stockholders’ equity: Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Accounts Receivable Accounts Receivable [Member] Remainder of 2026 Long-Term Debt, Maturity, Remainder of Fiscal Year Income Statement [Abstract] Income Statement [Abstract] Equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Operating expenses: Operating Expenses [Abstract] Deferred tax assets (note 15) Deferred Income Tax Assets, Net Schedule of Income Tax Benefit (Expense) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Description of Business [Abstract] Business Description [Abstract] Business Description [Abstract] Total contract liabilities Deferred Revenue, Current Schedule of Assumptions Used to Determine Fair Value of Options Granted Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Wooil Flucon Co., ("Wooil") Wooil Flucon Company [Member] Name of the companies components suppliers. Ninebell Co., Ltd. ("Ninebell") Ninebell Company Limited [Member] Name of the companies principal material supplier. Company A Company A [Member] Company A Accrued commissions Accrued Sales Commission, Current Time deposits, interest rate Time Deposits Interest Rate Time Deposits Interest Rate City Area Code City Area Code Market value Debt Securities, Trading Securities, Equity The market value of investments in trading equity securities and other forms of trading securities that provide ownership interests. Concentration of Credit Risk [Abstract] Concentration of Credit Risk [Abstract] Concentration of Credit Risk [Abstract] Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Document Information [Table] Document Information [Table] All Individuals All Individuals [Member] Name Forgone Recovery, Individual Name Finished goods Inventory, Finished Goods, Net of Reserves Cost not yet recognized (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Interest expense Interest Expense, Nonoperating Schedule of Components of Stock-based Compensation Expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Equity investments without readily determinable fair value using the measurement alternative Equity Securities without Readily Determinable Fair Value, Amount STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Additions Standard Product Warranty Accrual, Increase for Warranties Issued Proceeds from issuance of ACM Research shares, net of issuance costs (in shares) Stock Issued During Period, Shares, New Issues PEO PEO [Member] 2028 Long-Term Debt, Maturity, Year Two Stock-based compensation expense Share-Based Payment Arrangement, Expense Transportation equipment Transportation Equipment [Member] Other long-term liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Exercise of stock options (in shares) Exercise of stock options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Classes of common stock outstanding Number Of Classes Of Common Stock Outstanding Number Of Classes Of Common Stock Outstanding Revenue recognized from amounts included in contract liabilities at the beginning of the periods Contract with Customer, Liability, Revenue Recognized Payables and Accruals [Abstract] Payables and Accruals [Abstract] Other payables and accrued expenses (note 8) Total Other Accounts Payable and Accrued Liabilities Retained Earnings Retained Earnings [Member] Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Total operating expenses Operating Expenses Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Beginning balance (in shares) Ending balance (in shares) Common stock outstanding (in shares) Common Stock, Shares, Outstanding Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Award Timing Disclosures [Line Items] Schedule of Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Diluted (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Volatility maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Total Shareholder Return Amount Total Shareholder Return Amount Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Inventory [Domain] Inventory [Domain] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Ownership [Domain] Ownership [Domain] Research and development Research and Development Expense Adjustments to reconcile net income to net cash used in operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 2029 Long-Term Debt, Maturity, Year Three Share-Based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Revenue (note 3) Revenues Revenue from Contract with Customer, Excluding Assessed Tax Property, plant and equipment, net (note 6) Total property, plant and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Bank of China Bank of China [Member] Name of the lender. INVENTORIES, NET Inventory Disclosure [Text Block] Repurchase of shares held by ACM Shanghai Stock Repurchased During Period, Value Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Less: Comprehensive income attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest REVENUE FROM CONTRACTS WITH CUSTOMERS Revenue from Contract with Customer [Text Block] Non-cash operating lease cost Operating Lease, Cost, Non-Cash Operating Lease, Cost, Non-Cash Proceeds from issuance of ACM Research shares, net of issuance costs/ Issuance of shares by ACM Shanghai Stock Issued During Period, Value, New Issues Schedule of Direct or Indirect Interests of Subsidiaries Direct or Indirect Interests in Subsidiaries [Table Text Block] Tabular disclosure of the entity's subsidiaries and information of their direct or indirect interests with date, state of incorporation information. Construction in progress Construction in Progress [Member] Inventories Increase (Decrease) in Inventories Unrealized (loss) gain recognized on short-term investments held at September 30, Debt Securities, Trading, Unrealized Gain (Loss) Risk-free interest rate minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Accrued warranty Product Warranty Accrual, Current Income Taxes [Abstract] Income Tax Expense (Benefit), Continuing Operations [Abstract] Schedule of Principal Payments for Outstanding Long-Term Loan Schedule of Maturities of Long-Term Debt [Table Text Block] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Foreign Tax Authority Income Tax Jurisdiction, Foreign [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Office equipment Office Equipment [Member] Income from operations Operating Income (Loss) Current Fiscal Year End Date Current Fiscal Year End Date First-tools, Customer Ownership First-tools, Customer Ownership [Member] First-tools, Customer Ownership Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Shengyi Shengyi Semiconductor Technology Co., Ltd [Member] Name of related party. Related Party Transaction [Domain] Related Party Transaction [Domain] Total Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] ACM Shanghai dividend Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Yusheng Micro Semiconductor (Shanghai) Co., Ltd. Yusheng Micro Semiconductor (Shanghai) Co., Ltd [Member] Yusheng Micro Semiconductor (Shanghai) Co., Ltd Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Land, Buildings, And Plants Land, Buildings, And Plants [Member] Land, Buildings, And Plants Common stock issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] DESCRIPTION OF BUSINESS Business Description and Basis of Presentation [Text Block] FIN-48 payable Increase (Decrease) in Payable and Deferred Tax Liabilities The increase (decrease) during the period in the amount due for taxes based on the reporting entity's earnings or attributable to the entity's income earning process within a given jurisdiction. Long-Term Borrowings [Abstract] Long-Term Debt, Current and Noncurrent [Abstract] Four Customers Four Customers [Member] Four Customers Cashless exercise of stock options Cashless Exercise of Stock Options Cashless exercise of stock options. Hefei Shixi Chanheng Integrated Circuit Industry Venture Capital Fund Partnership (LP) ("Hefiei Shixi") Hefei Shixi Chanheng Integrated Circuit Industry Venture Capital Fund Partnership [Member] Name of the companies a Chinese limited partnership. Equity Components [Axis] Equity Components [Axis] Accounts receivable Increase (Decrease) in Accounts Receivable Product and Service [Domain] Product and Service [Domain] Related Party Related Party [Member] Class of Stock [Line Items] Class of Stock [Line Items] Income taxes paid Income Tax Paid, after Refund Received Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Accrued machine sales fees Accrued Machine Sales Fees, Current Accrued Machine Sales Fees, Current Class A Common Stock Common Stock Class A Common Class A [Member] Entity Interactive Data Current Entity Interactive Data Current Less: Net income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income attributable to ACM Research, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] China Merchants Bank China Merchants Bank [Member] Name of the lender. Statutory Accounting Practices [Line Items] Statutory Accounting Practices [Line Items] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Short-term time deposits (note 2) Deposits Assets, Current Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] ACM Research (Singapore) PTE. Ltd. ("ACM Singapore") ACM Research (Singapore) PTE. LTD. [Member] Entity owned or controlled by another entity. Other long-term assets Other Assets, Noncurrent Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Other comprehensive income (loss), foreign currency translation adjustment, tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Fair Value as of Grant Date Award Grant Date Fair Value SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Deferred revenue (note 3) Deferred Income, Current Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Total (loss) gain recognized on short-term investments Debt Securities, Trading, Gain (Loss) Proceeds from long-term borrowings Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Advanced Packaging (excluding ECP), Services & Spares Advanced Packaging (exclude ECP), Services & Spares [Member] Goods and Services produced, developed and distributed by the entity. Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions and Methodology [Abstract] Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions and Methodology [Abstract] Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies (note 16) Commitments and Contingencies Total cost Property cost Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] (Loss) income from equity method investments Income from equity method investments Income (Loss) from Equity Method Investments Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Mainland China CHINA Buildings and plants Buildings And Plants [Member] Facility held for productive use including, but not limited to, office, production, storage and distribution facilities and plant used in the operations of the entity. Counterparty Name [Axis] Counterparty Name [Axis] Liabilities and Equity Liabilities and Equity [Abstract] Number of installments for loan repayable Number of Installments for Loan Repayable Number of installments for loan repayable to bank. Purchase of time deposits Payments to Acquire Restricted Certificates of Deposit Inventories, net (note 5) Total inventories, net Inventory, Net Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Purchase of long-term investments Payments to Acquire Long-Term Investments Retained Earnings (Accumulated Deficit) [Abstract] Retained Earnings (Accumulated Deficit) [Abstract] Bills payable Bills Payable [Policy Text Block] Bills Payable Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Expected term in years Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Fair value of share of common stock (in dollars per share) Share Price PEO Name PEO Name Geographical [Axis] Geographical [Axis] Leasehold improvement Leasehold Improvements [Member] Charles Pappis [Member] Charles Pappis Line of credit facility, interest rate during period Line of Credit Facility, Interest Rate During Period Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] ACM Shanghai ACM Shanghai [Member] Entity owned or controlled by ACM Shanghai. Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] ACM Research (Shanghai), Inc. ("ACM Shanghai") ACM Shanghai ACM Research (Shanghai), Inc. [Member] Entity owned or controlled by another entity. Related parties accounts payable Increase (Decrease) in Due from Related Parties Entity Tax Identification Number Entity Tax Identification Number Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Available for sale debt securities Debt Securities, Available-for-Sale, Noncurrent Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Bills and accounts payable Increase (Decrease) in Accounts Payable Others Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Share-Based Payment Arrangement, Employee Share-Based Payment Arrangement, Employee [Member] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Income Taxes [Table] Income Taxes [Table] Disclosure of information about income taxes. FIN-48 payable (note 15) Income Taxes, Current, Payable and Deferred Tax Liabilities Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable. Conversion of Class B common stock to Class A common stock (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Rental fee charged to Related Party Transaction, Amounts of Transaction Investment, Name [Domain] Investment, Name [Domain] Customer [Domain] Customer [Domain] Schedule of Inventories Schedule of Inventory, Current [Table Text Block] 2027 Long-Term Debt, Maturity, Year One Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Repurchase of ACM Shanghai shares Payments for Repurchase of Common Stock Advances from customers (note 3) Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Advances to related parties Increase (Decrease) in Due to Related Parties Insider Trading Arrangements [Line Items] Accrued payroll taxes Accrued Payroll Taxes, Current Long-term borrowings (note 9) Total long-term borrowings, net of current portion Long-Term Debt, Excluding Current Maturities Gross proceeds from sales of ACM Shanghai shares Proceeds From (Payments For) Businesses and Interest in Affiliates, Financing Activities Proceeds From (Payments For) Businesses and Interest in Affiliates, Financing Activities Cost of revenue, including cost of revenue from related parties of $26,678 and $58,730 for the three and nine months ended September 30, 2026, respectively and $19,293 and $45,209 for the three and nine months ended September 30, 2025 respectively. Cost of revenue, related party Service fee charged by Cost of Revenue Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Proceeds from redemption and maturity of time deposits Increase (Decrease) of Long-term Time Deposits The cash outflow associated with increase of long-term time deposits maturity due after one year or beyond the normal operating cycle, if longer. Account receivables, net (note 4) Total accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) China Hong Kong HONG KONG Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] 2026 Subsidiary Stock Option Plan 2026 Subsidiary Stock Option Plan [Member] 2026 Subsidiary Stock Option Plan Available-for-sale debt securities Estimated fair value Debt Securities, Available-for-Sale Bills payable, current Bills Payable, Current Bills Payable, Current Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Expected dividend Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Long-Term Investments [Line Items] Long-Term Investments [Line Items] Long-Term Investments [Line Items] Short-term debt, weighted average interest rate, at point in time Short-Term Debt, Weighted Average Interest Rate, at Point in Time Concentration risk, percentage Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Long-Term Investments [Table] Long-Term Investments [Table] A container table for all schedule of long-term investments. Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and equity Liabilities and Equity Deposit Assets [Table] Deposit Assets [Table] Deposit Assets Employee Share Option Share-Based Payment Arrangement, Option [Member] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Non-controlling interests Equity, Attributable to Noncontrolling Interest Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Plan Name [Axis] Plan Name [Axis] Related Party [Domain] Related and Nonrelated Parties [Domain] Schedule of Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Annual total taxes Annual Total Taxes All taxes including value-added taxes, corporate income tax, personal income taxes, urban maintenance and construction taxes, education surcharges, stamp taxes, and vehicle and shipping taxes. Income Tax Authority [Domain] Income Tax Jurisdiction [Domain] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Schedule of Unrealized Gain (Loss) on Trading Securities Unrealized Gain (Loss) on Investments [Table Text Block] Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Purchase of intangible assets Payments to Acquire Intangible Assets Other expense, net Other Nonoperating Income (Expense) Five Customers Five Customers [Member] Five Customers Schedule of Long-Term Investment Long-Term Investment [Table Text Block] Tabular disclosure of long-term investment. LONG-TERM BORROWINGS Long-Term Debt [Text Block] Schedule of Other Payables and Accrued Expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Transfer from other non-current assets to long term investment Transfer From Other Non-Current Assets To Long-Term Investments Transfer From Other Non-Current Assets To Long-Term Investments Name Awards Close in Time to MNPI Disclosures, Individual Name ACM Research (CA), Inc. ("ACM California") ACM Research (CA), Inc. [Member] Entity owned or controlled by another entity. Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Schedule of Components of Trading Securities Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] General and administrative General and Administrative Expense Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Sale of stock, price per share (in USD per share) Sale of Stock, Price Per Share Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Adjustment to Compensation: Adjustment to Compensation [Axis] Other payables and accrued expenses Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Unrealized (loss) gain on short-term investments (note 11) Unrealized gain on short-term investments Marketable Security, Unrealized Gain (Loss) Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Inventory [Line Items] Inventory [Line Items] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total assets Assets, Fair Value Disclosure Financial Instruments Investment, Policy [Policy Text Block] Income Tax Authority [Axis] Income Tax Jurisdiction [Axis] Name Measure Name INCOME TAXES Income Tax Disclosure [Text Block] Schedule of Cash and Cash Equivalents [Table] Cash and Cash Equivalent [Table] Bills and accounts payable (note 2) Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Others Other Noncash Income (Expense) Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Basis of Presentation and Principles of Consolidation Basis of Presentation and Principles of Consolidation [Policy Text Block] Disclosure of accounting policy for basis of presentation and principles of consolidation, used to prepare the financial statements. Additional Paid- in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Manufacturing equipment Equipment [Member] Long-Term Debt, by Current and Noncurrent [Abstract] Long-Term Debt, by Current and Noncurrent [Abstract] Short-term investments (note 11) Short-Term Investments Deferred offering costs included in other payables and accrued expenses Noncash Deferred Offering Costs Included In Other Payables And Accrued Expenses Noncash Deferred Offering Costs Included In Other Payables And Accrued Expenses Repayments of short-term borrowings Repayments of Short-Term Debt Shengyi Micro Semiconductor (Shanghai) Co., Ltd. Shengyi Micro Semiconductor (Shanghai) Co., Ltd. [Member] Shengyi Micro Semiconductor (Shanghai) Co., Ltd. Name Trading Arrangement, Individual Name Cash and cash equivalents (note 2) Cash and cash equivalents Cash and Cash Equivalent Raw materials Inventory, Raw Materials, Net of Reserves Principal Payments of Long-Term Loan [Abstract] Long-Term Debt, Fiscal Year Maturity [Abstract] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Dividends from unconsolidated affiliates Proceeds from Equity Method Investment, Distribution SHORT-TERM BORROWINGS Short-Term Debt [Text Block] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] ACM Research (Wuxi), Inc. ("ACM Wuxi") ACM Research (Wuxi), Inc. [Member] Entity owned or controlled by another entity. Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Current assets: Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Income tax expense (note 15) Total income tax expense Income tax expense Income Tax Expense (Benefit) Interest-bearing debt ratio Debt Instrument, Covenant, Interest-Bearing Debt To EBITDA Ratio, Maximum Debt Instrument, Covenant, Interest-Bearing Debt To EBITDA Ratio, Maximum Customer Concentration Risk Customer Concentration Risk [Member] Statutory surplus reserve (note 18) Statutory accounting practices, statutory capital and surplus, balance Statutory Accounting Practices, Statutory Capital and Surplus, Balance Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Award Timing Method Award Timing Method [Text Block] Net increase in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Numerator: Net Income (Loss) Attributable to Parent [Abstract] South Korea KOREA, REPUBLIC OF Volatility minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Agricultural Bank of China Agricultural Bank of China [Member] Agricultural Bank of China Accrued Lingang construction fees Accrued Construction Fees, Current Accrued Construction Fees, Current Net income attributable to ACM Research, Inc. Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Share-Based Payment Arrangement, Nonemployee Share-Based Payment Arrangement, Nonemployee [Member] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] ECP (front-end and packaging), Furnace and Other Technologies ECP Front End And Packaging Furnace And Other Technologies [Member] Goods and Services produced, developed and distributed by the entity. Interest income Investment Income, Interest Schedule of Accounts Receivables and Contract Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Inventory provision Increase (Decrease) In Provision For Inventory Increase (Decrease) In Provision For Inventory Realized gain on short-term investments Debt Securities, Trading, Realized Gain (Loss) Proceeds from short-term borrowings Proceeds from Short-Term Debt Non-cash financing activities: Other Noncash Investing and Financing Items [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Less: Dilutive effect arising from stock-based awards by ACM Shanghai Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities