Award Type [Axis] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract] OTHER PAYABLE AND ACCRUED EXPENSES Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accounts payable Accounts payable Accounts Payable, Related Parties, Current Accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Accounts receivable, less allowance for doubtful accounts of $0 as of March 31, 2022 and December 31, 2021 (note 4) Total Accounts Receivable [Member] Accounts Receivable [Abstract] Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] Accrued professional fees Accrued commissions Income taxes payable (note 19) Capitalized interest charges related to property Accumulated other comprehensive income Accumulated Other Comprehensive Income [Member] Less: Total accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Additional paid in capital Additional Paid in Capital Additional Paid-in Capital [Member] Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Adjustments to reconcile net income from operations to net cash used in operating activities Stock-based compensation expense Share-based Payment Arrangement, Expense Accounts receivable, allowance for doubtful accounts Less: Allowance for doubtful accounts Total assets Assets Assets Assets Assets [Abstract] Total current assets Assets, Current Current assets: Current assets: DESCRIPTION OF BUSINESS Business Description and Basis of Presentation [Text Block] Capitalized research and development expenses, amortization period Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents at end of period Cash and cash equivalent at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash paid for amounts included in the measurement of lease liabilities [Abstract] Cash Flow, Operating Activities, Lessee [Abstract] Cash and cash equivalents Class of Stock [Line Items] Class of Stock [Domain] Class of Stock [Abstract] COMMITMENTS AND CONTINGENCIES [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Commitments and contingencies (note 20) Class B Common Stock [Member] Common Stock Class B [Member] Common Class B [Member] Class A Common Stock [Member] Common Stock Class A [Member] Common Class A [Member] Common Stock [Member] Common Stock [Member] Common stock, shares issued (in shares) Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, par value (in dollars per share) Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock Common Stock, Value, Issued Common stock, shares authorized (in shares) Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares outstanding (in shares) Common stock, shares outstanding (in shares) Income Tax Benefit (Expense) [Abstract] Less: Comprehensive income (loss) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive Income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income: Comprehensive income (loss) attributable to ACM Research, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Concentration Risk [Table] Concentration Risk Type [Domain] Concentration of credit risk Concentration Risk Benchmark [Domain] Concentration Risk Type [Axis] Concentration Risk [Line Items] Concentration Risk Benchmark [Axis] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Construction in progress Advances from customers Contract with Customer, Liability, Current Commitments Convertible shares in to Class A common stock (in shares) Cost of revenue Cost of Revenue [Member] Customer Concentration Risk [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Table] Disaggregated Revenue Information Unrealized loss on trading securities Debt Securities, Trading, Unrealized Loss SHORT-TERM BORROWINGS [Abstract] Debt Instrument [Axis] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Line Items] Last installment due date Debt Instrument, Name [Domain] Deferred tax liability (note19) Deferred tax assets (note 19) Deferred revenue Deferred income taxes Long-term time deposits Short-term time deposits Depreciation expense Depreciation and amortization Less: Dilutive effect arising from share-based awards by ACM Shanghai Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities STOCK-BASED COMPENSATION [Abstract] STOCK-BASED COMPENSATION Share-based Payment Arrangement [Text Block] Net income (loss) attributable to ACM Research, Inc. per common share (note 2): Net income (loss) per common share [Abstract] Earnings Per Share, Basic and Diluted [Abstract] Basic and Diluted Net Income per Common Share Earnings Per Share, Policy [Policy Text Block] Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Basic and Diluted Net Income per Common Share [Abstract] Earnings Per Share [Abstract] Diluted (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Effect of exchange rate changes on cash and cash equivalents Foreign corporate tax rate Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Statutory U.S federal income tax rate Weighted-average period over which unrecognized compensation is expected to be recognized Employee Share Option [Member] Employee Stock Purchase Plan [Member] Share-based Payment Arrangement, Option [Member] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Accrued payroll Unrecognized employee stock-based compensation expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Manufacturing Equipment [Member] Equity Component [Domain] COMMON STOCK [Abstract] Purchase price Percentage of ordinary shares issued Investment - equity method Intangible assets, net Finite-Lived Intangible Assets, Net PRC [Member] Loss on disposals of property, plant and equipment Gain (Loss) on Disposition of Property Plant Equipment General and administrative General and Administrative Expense [Member] Gross profit Gross Profit Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income Statement Location [Domain] INCOME TAXES [Abstract] Income Statement Location [Axis] Income Tax Authority [Axis] Equity (income) loss in net (income) loss of affiliates Equity income (loss) in net income (loss) of affiliates Income (Loss) from Equity Method Investments Condensed Consolidated Statements of Operations and Comprehensive Income [Abstract] Income Tax Authority [Domain] INCOME TAXES Income Tax Disclosure [Text Block] Income tax benefit (note 19) Total income tax benefit Income Tax Expense (Benefit) Interest or penalties Income Tax Examination, Penalties and Interest Expense Income Taxes [Abstract] Income Tax Expense (Benefit), Continuing Operations [Abstract] Cash paid for income taxes Income tax recoverable Advances from customers Other long-term assets Increase (Decrease) in Other Noncurrent Assets Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Accounts receivable Increase (Decrease) in Accounts Receivable Income tax payable Accounts payable Increase (Decrease) in Accounts Payable Deferred revenue Increase (Decrease) in Deferred Revenue Inventory Increase (Decrease) in Inventories Net changes in operating assets and liabilities: Other payables and accrued expenses Other receivables Increase (Decrease) in Other Receivables Prepaid expenses Increase (Decrease) in Prepaid Expense Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Interest expense related to long-term borrowings incurred Interest expense Interest Expense Capitalized interest charged as other long-term assets Interest Costs Capitalized Interest expense charged to long-term borrowings Interest expense related to short-term borrowings Interest Expense, Short-term Borrowings Interest paid, net of capitalized interest INVENTORIES [Abstract] Inventory [Line Items] Inventory reserve INVENTORIES Inventory, Current [Table] Finished goods Total inventory Inventory, Gross Work in process Inventories (note 5) Inventory [Abstract] Raw materials Investments [Domain] Interest income Investment Type [Axis] Long-term investments (note 14) Total TRADING SECURITIES [Abstract] Investments [Abstract] Investor [Member] IPO [Member] LEASES Lessee, Operating Leases [Text Block] 2023 Lessee, Operating Lease, Liability, to be Paid, Year One Total lease payments Lessee, Operating Lease, Liability, to be Paid Less: Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount 2027 2026 Lessee, Operating Lease, Liability, to be Paid, Year Four 2022 2025 Lessee, Operating Lease, Liability, to be Paid, Year Three Maturities of Outstanding Lease Liabilities for Operating Leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] 2024 Lessee, Operating Lease, Liability, to be Paid, Year Two Weighted average remaining lease terms and discount rates [Abstract] Long-Term Borrowings [Abstract] Long-term Debt, Current and Noncurrent [Abstract] Components of lease expense [Abstract] Lease, Cost [Abstract] Lease cost Lease, Cost Components of Lease Expense Lease, Cost [Table Text Block] Leasehold Improvement [Member] LEASES [Abstract] Total liabilities Liabilities Liabilities and Stockholders' Equity Total liabilities and stockholders' equity Liabilities and Equity Total current liabilities Liabilities, Current Current liabilities: Line of Credit Facility [Line Items] Lender Name [Axis] Line of Credit Facility [Table] Maximum borrowing capacity Line of Credit Facility, Lender [Domain] Annual interest rate ACCOUNTS RECEIVABLE 2022 Long-Term Debt, Maturity, Remainder of Fiscal Year Long-term debt Long-term Debt LONG-TERM BORROWINGS Principal Payments of Long-Term Loan [Abstract] Long-term Debt, Fiscal Year Maturity [Abstract] 2023 Long-Term Debt, Maturity, Year One LONG-TERM BORROWINGS [Abstract] Current portion of long-term borrowings (note 12) Less: Current portion LONG-TERM INVESTMENT [Abstract] 2024 Long-Term Debt, Maturity, Year Two Long-term borrowings (note 12) Long-term Borrowings 2025 Long-Term Debt, Maturity, Year Three Required liquidate damage value Unrealized loss on trading securities Unrealized loss on trading securities Trading securities (note 15) Non-controlling interests Net cash (used in) provided by financing activities Net Cash Provided by (Used in) Financing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Net cash flow (used in) provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Net income (loss) attributable to ACM Research, Inc. Net Income (Loss) Attributable to Parent Numerator [Abstract] Net Income (Loss) Attributable to Parent [Abstract] Net income (loss) available to common stockholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted Less: Net income (loss) attributable to non-controlling interests Less: Net income (loss) attributable to non-controlling interests Recent Accounting Pronouncements Non-cash financing activities: Noncash Investing and Financing Items [Abstract] Noncontrolling Interests [Member] Noncontrolling Interest [Member] Office Equipment [Member] Current portion of operating lease liability (note 11) Weighted average discount rate Long-term operating lease liability (note 11) Maturities of outstanding lease liabilities [Abstract] Lessee, Operating Lease, Liability, Payment, Due [Abstract] Operating cash outflow from operating leases Operating lease right-of-use assets, net (note 11) Operating lease cost Weighted average remaining lease term Present value of lease liabilities Operating expenses: Total operating expenses, net Operating Expenses Income (loss) from operations Operating Income (Loss) DESCRIPTION OF BUSINESS [Abstract] Other Long-Term Liabilities Other Noncurrent Liabilities [Table Text Block] Foreign currency translation adjustment OTHER LONG-TERM LIABILITIES [Abstract] Other receivables Other Receivables, Net, Current Other payables and accrued expenses (note 10) Total Others Other Assets, Miscellaneous, Noncurrent Other Long-term Assets [Abstract] Other Assets, Noncurrent [Abstract] OTHER LONG-TERM ASSETS [Abstract] Other long-term assets (note 8) Total other long-term assets Other Long-term Liabilities [Abstract] Other Liabilities, Noncurrent [Abstract] OTHER LONG-TERM LIABILITIES Other long-term liabilities (note 13) Other long-term liabilities Other Investee [Member] Other income, net Others Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent OTHER PAYABLE AND ACCRUED EXPENSES [Abstract] Purchase of intangible assets Payments to Acquire Intangible Assets Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Plan Name [Domain] Plan Name [Axis] Prepaid expenses Proceeds from sale of interest in subsidiary Gross proceeds of stock issuance Proceeds from short-term borrowings Proceeds from stock option exercise to common stock Accrued warranty Net income (loss) Net income (loss) Net income (loss) Net income (loss) Property, Plant and Equipment [Line Items] PROPERTY, PLANT AND EQUIPMENT, NET Property, Plant and Equipment Disclosure [Text Block] Estimated useful lives Property, Plant and Equipment, Useful Life PROPERTY, PLANT AND EQUIPMENT, NET [Abstract] Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Domain] Property, plant and equipment, net (note 6) Total property, plant and equipment, net Total cost Property cost Property, Plant and Equipment [Abstract] Inventory [Axis] Inventory [Domain] Investments Real Estate Investments, Net ACCOUNTS RECEIVABLE [Abstract] RELATED PARTY BALANCES AND TRANSACTIONS [Abstract] Related Party Transaction [Line Items] Related Party Transaction [Abstract] Related Party Transaction, Due from (to) Related Party, Current [Abstract] Related Party Transaction [Axis] Related Party [Axis] RELATED PARTY BALANCES AND TRANSACTIONS Related Party Transactions Disclosure [Text Block] Related Party Transaction [Domain] Purchase of materials Related Party Transaction, Purchases from Related Party Related Party [Domain] Service fee charged by Repayments of short-term borrowings Repayments of Lines of Credit Research and development Research and Development Expense [Member] Accumulated Surplus [Member] Accumulated surplus Retained Earnings (Accumulated Deficit) REVENUE FROM CONTRACTS WITH CUSTOMERS [Abstract] Revenue Revenue (note 3) REVENUE FROM CONTRACTS WITH CUSTOMERS Expected term in years Weighted Average Grant Date Fair Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding weighed average remaining contractual term Forfeited/cancelled (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Outstanding at end of period (in dollars per share) Outstanding at beginning of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price Percentage of shares owned by Company after stock issuance Share price (in RMB per share) Sale of Stock, Price Per Share Sale of Stock [Domain] Revenue Benchmark [Member] Assumptions Used to Determine Fair Value of Share Options Granted Summary of Share Option Activities Share-based Payment Arrangement, Option, Activity [Table Text Block] Principal Payments for Outstanding Long-Term Loan Schedule of Maturities of Long-term Debt [Table Text Block] Inventory Related Party Balances and Transactions Schedule of Related Party Transactions [Table Text Block] Components of Stock-based Compensation Expense Share-based Payment Arrangement, Cost by Plan [Table Text Block] Income Tax Benefit (Expense) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Basic and Diluted Net Income per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Other Payable and Accrued Expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Long-Term Borrowings Schedule of Long-term Debt Instruments [Table Text Block] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Schedule of Related Party Transactions, by Related Party [Table] Property, Plant and Equipment [Table] Other Long-term Assets Schedule of Other Assets, Noncurrent [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Short-Term Borrowings Schedule of Short-term Debt [Table Text Block] Schedule of Short-term Debt [Table] Schedule of Stock by Class [Table] Debt and Equity Securities, FV-NI [Line Items] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Sales and Marketing Expense [Member] Sales and marketing Selling and Marketing Expense Weighted Average Exercise Price [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Forfeited/cancelled (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Fair value of common share (in dollars per share) Share Price Stock-based Compensation Expense [Abstract] Share-based Payment Arrangement, Noncash Expense [Abstract] Stock-based compensation Share-based Payment Arrangement, Noncash Expense Expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Expected dividend Stock-Based Compensation [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Fair Value of Options Granted [Abstract] Risk-free interest rate Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Vested and exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Volatility Forfeited/cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Weighed Average Remaining Contractual Term [Abstract] Outstanding, end of period (in shares) Outstanding, beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Outstanding, end of period (in dollars per share) Outstanding, beginning of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Number of Option Share [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Award Type [Domain] Share price (in dollars per share) Shares issued (in shares) Shares, Issued Ending balance (in shares) Beginning balance (in shares) Shares, Outstanding SHORT-TERM BORROWINGS Short-term Debt [Text Block] Short-term Debt [Line Items] Short-term borrowings (note 9) Short-term borrowings Short-Term Borrowings [Abstract] Short-term Debt [Abstract] Short-term lease cost SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Condensed Consolidated Balance Sheets [Abstract] Class of Stock [Axis] Statement [Table] Statement [Line Items] Condensed Consolidated Statements of Cash Flows [Abstract] Equity Components [Axis] Condensed Consolidated Statements of Changes in Stockholder's Equity [Abstract] Exercise of stock options (in shares) Stock issued upon exercise of stock options (in shares) Exercised (in shares) Offering of shares (in shares) Stock Issued During Period, Shares, New Issues Conversion of class B common stock to Class A common stock (in shares) Stock Issued During Period, Shares, Conversion of Units Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Conversion of Class B common stock to Class A common stock Stock split ratio Reverse stock split Total ACM Research, Inc. stockholders' equity Stockholders' Equity Attributable to Parent COMMON STOCK Stockholders' Equity Note Disclosure [Text Block] Total stockholders' equity Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Stockholders' equity: Stockholders' equity: Sale of Stock [Axis] Supplemental disclosure of cash flow information: Components of Trading Securities Cost Transportation Equipment [Member] Unrecognized tax benefits Unrecognized tax benefits that would impact effective tax rate Use of Estimates Diluted (in shares) Weighted average shares outstanding, diluted (in shares) Effect of dilutive securities (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Basic (in shares) Weighted average shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Weighted average common shares outstanding used in computing per share amounts (note 2): Consolidated Entities [Domain] Consolidated Entities [Axis] Director [Member] Investment, Name [Domain] Customer [Axis] Maximum [Member] Minimum [Member] Customer [Domain] Product and Service [Domain] Product and Service [Axis] Statistical Measurement [Domain] Statistical Measurement [Axis] Investment, Name [Axis] Geographical [Domain] Geographical [Axis] Subsidiaries [Member] Subsidiaries [Member] Subsidiaries [Member] Title of Individual [Domain] Title of Individual [Axis] Mainland China [Member] Cover [Abstract] Document Information [Table] Document Information [Line Items] Document Type Document Quarterly Report Document Transition Report Entity Interactive Data Current Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Document Period End Date Entity Registrant Name Entity Central Index Key Entity File Number Entity Tax Identification Number Entity Incorporation, State or Country Code Current Fiscal Year End Date Entity Current Reporting Status Entity Shell Company Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Common Stock, Shares Outstanding Cashless exercise of stock options. Cashless Exercise of Stock Options Cashless exercise of stock options 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. Increase (Decrease) in Payable and Deferred Tax Liabilities FIN-48 payable The cash outflow associated with increase of short-term time deposits maturity due within one year or the normal operating cycle, if longer. Increase (Decrease) of Short-term Time Deposits Increase of short-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. Increase (Decrease) of Long-term Time Deposits Increase of long-term time deposits The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. Repayments of Long-term Borrowing Repayments of long-term borrowings The entire disclosure for trading securities. Trading Securities [Text Block] TRADING SECURITIES Goods and Services produced, developed and distributed by the entity. Total Single Wafer and Semi-Critical Cleaning Equipment [Member] Single Wafer Cleaning, Tahoe and Semi-Critical Cleaning Equipment [Member] Goods and Services produced, developed and distributed by the entity. Advanced Packaging Other Processing Services and Spares [Member] Advanced Packaging, Other Processing Tools, Services and Spares [Member] Goods and Services produced, developed and distributed by the entity. ECP Front End And Packaging Furnace And Other Technologies [Member] ECP (Front-end and Packaging), Furnace and Other Technologies [Member] Goods and Services produced, developed and distributed by the entity. Wet Cleaning And Other Front End Processing Tools [Member] Wet Cleaning and Other Front-end Processing Tools [Member] Disaggregated Revenue Information [Abstract] Represents other regions. Oher Regions [Member] Goods and Services produced, developed and distributed by the entity. Advanced Packaging (exclude ECP), Services & Spares [Member] Advanced Packaging (Excluding ECP), Services & Spares [Member] Carrying value as of the balance sheet date of obligations incurred through that date and payable for machine testing fees. Accrued Machine Testing Fees, Current Accrued machine testing fees A contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time, and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars. Line of Credit 3 [Member] Line of Credit Due on October 22, 2022 [Member] A contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time, and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars. Line of Credit 1 [Member] Line of Credit Due on June 7, 2022 [Member] A contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time, and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars. Line of Credit 2 [Member] Line of Credit Due on October 21, 2022 [Member] LAND USE RIGHT, NET [Abstract] The entire disclosure for land use rights, net. Land Use Rights, Net [Text Block] LAND USE RIGHT, NET Tabular disclosure of land use rights, net. Land Use Rights, Net [Table Text Block] Land Use Rights Tabular disclosure of annual amortization of land use right. Annual Amortization of Land Use Right [Table Text Block] Annual Amortization of Land Use Right Annual Amortization of Land use Right [Abstract] Amount of annual amortization expense for land use right, expected to be recognized in second fiscal year following current fiscal year. Amortization of Land Use Right Due Year Two 2024 Amount of annual amortization expense for land use right, expected to be recognized in next twelve months following current fiscal year. Amortization of Land Use Right Due Next Twelve Months 2023 Amount of annual amortization expense for land use right, expected to be recognized in fourth fiscal year following current fiscal year. Amortization of Land Use Right Due Year Four 2026 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. Area of Square Foot for Development and Production Center Area for development and production center Amount of amortization of ground lease. Amortization of Ground Lease Amortization Entity owned or controlled by another entity. Shengwei Research (Shanghai), Inc. [Member] Shengwei Research (Shanghai), Inc. [Member] Shengwei Research (Shanghai), Inc. [Member] Land use Right [Abstract] Land use right represents the cost to purchase land use right. Land use right net Land use right, net Land use right, net (note 7) 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. Land use Right, Purchase Amount Land use right purchase amount Amount of accumulated amortization on land use right. Land use Right, Accumulated Amortization Less: accumulated amortization Right to use land lease term, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Right to Use Land Lease Term Right to use land lease term Amount of annual amortization expense for land use right, expected to be recognized in reminder of fiscal year of following current fiscal year. Amortization Of Land Use Right Due Remainder Of Fiscal Year 2022 Amount of annual amortization expense for land use right, expected to be recognized in third fiscal year following current fiscal year. Amortization of Land Use Right Due Year Three 2025 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. Buildings and Plants [Member] The entire disclosure for other noncurrent assets. Other Assets, Non-Current Disclosure [Text Block] OTHER LONG-TERM ASSETS Amount of lease deposit 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. Prepayment for Property - Lease Deposit Prepayment for property - lease deposit Amount of security deposit for land use right paid in advance. Security Deposit for Land Use Right Security deposit for land use right Amount of property, plant and equipment and other non-current assets 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. Prepayment for Property, Plant and Equipment and Other non-Current Assets Prepayment for property, plant and equipment and other non-current assets 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. Prepayment for Property, Non Current Prepayment for property - Lingang Name of the lender. China Merchants Bank [Member] China Merchants Bank [Member] Name of the lender. Bank of China [Member] Bank of China [Member] Number of installments for loan repayable to bank. Number of Installments for Loan Repayable Number of installments for loan repayable Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing fourth fiscal year and after following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Long Term Debt, Maturities, Repayments of Principal Year Four and After 2026 and onwards Amount borrowed from the bank on September 2021 with the annual interest rate is 2.6%. Loan Two [Member] Loan 2 [Member] Amount borrowed from the bank on June 2021 with the annual interest rate is 2.6%. Loan One [Member] Loan 1 [Member] Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations. Income Taxes Payable Current Income taxes payable Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable. Income Taxes, Current, Payable and Deferred Tax Liabilities FIN-48 payable (note 19) Tabular disclosure of the entity's subsidiaries and information of their direct or indirect interests with date, state of incorporation information. Direct or Indirect Interests in Subsidiaries [Table Text Block] Direct or Indirect Interests of Subsidiaries Subsidies to electro copper plating project, commenced in 2014. Subsidies to Electro Copper Plating project [Member] Subsidies to Electro Copper Plating Project, Commenced in 2014 [Member] Subsidies to other cleaning tools, commenced in 2020. Subsidies to Other Cleaning Tools, Commenced in 2020 [Member] Subsidies to Other Cleaning Tools, Commenced in 2020 [Member] Subsidies to stress free polishing project, commenced in 2008 and 2017. Subsidies to Stress Free Polishing project [Member] Subsidies to Stress Free Polishing Project, Commenced in 2008 and 2017 [Member] Other items related to other long-term liabilities. Other [Member] Other [Member] Subsidies to SW Lingang R&D development in 2021. Subsidies to SW Lingang R&D development in 2021 [Member] Subsidies to SW Lingang R&D development in 2021 [Member] Period after the land use right is obtained, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Land Use Rights Period Land use rights period 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. Annual Total Taxes Annual total taxes Number of outstanding legal proceeding regarding securities class action. Number of Outstanding Legal Proceedings Number of outstanding legal proceedings The entire disclosure for long-term investment. long-term investment [Text Block] LONG-TERM INVESTMENT Entity owned or controlled by another entity. ACM Research (Shanghai), Inc. [Member] ACM Shanghai [Member] ACM Research (Shanghai), Inc. [Member] Share-based payment arrangement of non employee stock option granting right, subject to vesting and other restrictions, to purchase or sell certain number of shares at predetermined price for specified period of time. Share-based Payment Arrangement, Non Employee Stock Option [Member] Non-Employee Stock Option [Member] Non-Employee Stock Purchase Plan [Member] Fair value of option grants in period, valuation model assumptions based on service period. Service Period Based Approach [Member] Service Period Based [Member] Number of votes entitled for each share of common stock. Voting Rights per Share Number of votes for each share entitled The number of common shares reserved for issuance as dividends. Additional shares reserved for issuance as dividends Additional shares reserved for issuance as dividends (in shares) Disclosure of accounting policy for basis of presentation and principles of consolidation, used to prepare the financial statements. Basis of Presentation and Principles of Consolidation [Policy Text Block] Basis of Presentation and Principles of Consolidation Disclosure of accounting policy for COVID-19 assessment. COVID-19 Assessment [Policy Text Block] COVID-19 Assessment Weighted average grant-date fair value of non-vested options expired. Share-based Compensation Arrangement by Share-based Payment Award Options Expired in Period Weighted Average Grant Date Fair Value Expired (in dollars per share) Weighted average grant-date fair value of non-vested options exercised. Share-based Compensation Arrangement by Share-based Payment Award Options Exercised in Period Weighted Average Grant Date Fair Value Exercised (in dollars per share) A container table for all schedule of long-term investments. Long-Term Investments [Table] 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. Long-Term Investment [Line Items] Classification of Investments [Abstract] Classification of Investments [Abstract] Name of the companies components suppliers. Shengyi Semiconductor Technology Company Limited [Member] Shengyi [Member] Name of the companies components suppliers. Waferworks Company Limited [Member] Waferworks [Member] Name of the companies principal material supplier. Ninebell Company Limited [Member] Ninebell [Member] Name of the companies a Chinese limited partnership. Hefei Shixi Chanheng Integrated Circuit Industry Venture Capital Fund Partnership [Member] Hefei Shixi [Member] Long-term investments excluding other. Investment Excluding Other [Member] Investment Excluding Other Investee [Member] The amount of investment in partnership. Investment in Partnership Investment in partnership The percentage ownership in Partnership's total subscribed capital. Ownership Percentage in Partnership Ownership percentage in partnership The number of investors with agreements entered pursuant to qualifying for the Listing and IPO. Number of Investors with Agreements Entered Number of investors with agreements entered Name of investment including named security. Equity Investment [Member] Equity Investment [Member] Name of the companies a Chinese limited partnership. Semiconductor Manufacturing International Corporation [Member] SMIC [Member] Name of the companies a Chinese limited partnership. Qingdao Fortune-Tech Xinxing Capital Partnership [Member] Qingdao LP [Member] Total fund of the Partnership which was contributed by limited partners. Capital Fund of Limited Partnership Total capital fund of limited partnership Trading Securities Listed in Shanghai Stock Exchange [Abstract] Trading securities listed in Shanghai Stock Exchange [Abstract] The market value of investments in trading equity securities and other forms of trading securities that provide ownership interests. Debt Securities, Trading Securities, Equity Market value Tabular disclosure of lessee's operating lease supplemental cash flow information. Lessee Operating Lease Supplemental Cash Flow Information Related to Operating Leas [Table Text Block] Supplemental Cash Flow Information Related to Operating Leases Tabular disclosure of weighted average remaining lease terms and discount rates for operating leases. Lessee, Operating Lease, Weighted Average Remaining Lease Term and Discount Rate [Table Text Block] Weighted Average Remaining Lease Terms and Discount Rates for Operating Leases Supplemental Cash Flow Information Related to Operating Leases [Abstract] Supplemental cash flow information related to operating leases [Abstract] Concentration of Credit Risk [Abstract] Number of major customers who contributes 10% or more of entity's total revenue. Number of Major Customers Number of major customers Information by number of customers. Three customers [Member] Three Customers [Member] Finished goods in which customers are obligated to take ownership upon acceptance. Contractual Obligation [Member] Finished goods inventory shipped to existing or prospective customers. First-Tools [Member] Disclosure of information about income taxes. Income Taxes [Table] Entity owned or controlled by another entity. ACM Research (Wuxi), Inc. [Member] ACM Research (Wuxi), Inc. [Member] 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. Income Taxes [Line Items] Effective period for entities certified as "advanced and new technology enterprises" to receive preferential income tax rate, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Effective Period of Preferential Income Tax Rate Effective period of preferential income tax rate Percentage of foreign tax rate. Foreign corporate tax rate The number of subsidiaries liable for PRC corporate income taxes rate. Number of Subsidiaries Number of subsidiaries Represents Second portion of investors. Second Tranche Investors [Member] Entity owned or controlled by another entity. ACM Research (Beijing), Inc. [Member] ACM Research (Beijing), Inc. [Member] Entity owned or controlled by another entity. ACM Research (Cayman), Inc. [Member] ACM Research (Cayman), Inc. [Member] Entity owned or controlled by another entity. CleanChip Technologies Limited [Member] CleanChip Technologies Limited [Member] Entity owned or controlled by another entity. ACM Research (CA), Inc. [Member] ACM Research (CA), Inc. [Member] Business Description [Abstract] Description of Business [Abstract] Term to complete listing of shares of ACM Shanghai on the Shanghai Stock Exchange's new Sci-Tech innovation board known as Star Market, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Term to Complete Listing of Shares Term to complete listing of shares Name of entity owned or controlled by another entity. Name of Subsidiary Name of subsidiaries Percentage amount of shares offered from shares outstanding in reference to IPO. Percentage amount of shares offered from shares outstanding Percentage amount of shares offered from shares outstanding The percentage of ownership of common stock or equity participation of subsidiaries. Subsidiaries Ownership Percentage Effective interest held as at Represents first portion of investors. First Tranche Investors [Member] Percentage of equity interests acquired at the acquisition date in the business combination. Business Acquisition, Percentage of Equity Interests Acquired Purchase of equity interest percentage Entity owned or controlled by another entity. ACM Research Korea CO., LTD [Member] ACM Research Korea CO., LTD [Member] Information of place and date of incorporation of an entity. Name of Date of Incorporation Place and date of incorporation Entity owned or controlled by another entity. ACM Research (Singapore) PTE. LTD. [Member] ACM Research (Singapore) PTE, Ltd. [Member] Entity owned or controlled by another entity. Hanguk ACM CO., LTD. [Member] Hanguk ACM CO., LTD. [Member] Ratio applied to the conversion of reverse stock split, for example but not limited to, one share converted to two or two shares converted to one. Stockholders' Equity Note, Reverse Stock Split, Conversion Ratio Reverse stock split Name of related party. Ninebell Co., Ltd [Member] Ninebell Co., Ltd [Member] Amount for prepaid expense to related parties. Related Party Transaction, Prepaid Expense from Related Party Prepaid expenses Name of related party. Shengyi Semiconductor Technology Co., Ltd [Member] Shengyi Semiconductor Technology Co., Ltd [Member] Tabular disclosure of long-term investment. Long-Term Investment [Table Text Block] Long-Term Investment