SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Bank Of China June 2025 Facility Bank Of China June 2025 Facility [Member] Bank Of China June 2025 Facility Increase (decrease) in raw materials Increase (Decrease) in Raw Materials, Packaging Materials and Supplies Inventories Statistical Measurement [Domain] Statistical Measurement [Domain] Non-cash operating lease cost Operating Lease, Cost, Non-Cash Operating Lease, Cost, Non-Cash Line Of Credit, China Merchants Bank, Due On March 1, 2025 With An Annual Interest Rate Of 2.60% Line Of Credit, China Merchants Bank, Due On March 1, 2025 With An Annual Interest Rate Of 2.60% [Member] Line Of Credit, China Merchants Bank, Due On March 1, 2025 With An Annual Interest Rate Of 2.60% Short-Term Borrowings Schedule of Short-Term Debt [Table Text Block] Long-Term Investments [Table] Long-Term Investments [Table] A container table for all schedule of long-term investments. Restricted cash Restricted Cash, Current Award Timing Predetermined Award Timing Predetermined [Flag] 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. Entity File Number Entity File Number Additional Paid- in Capital Additional Paid-in Capital [Member] Income from equity method investments Income from equity method investments Income (Loss) from Equity Method Investments Tabular List, Table Tabular List [Table Text Block] Number of outstanding legal proceedings Number of Outstanding Legal Proceedings Number of outstanding legal proceeding regarding securities class action. Recently Issued Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Purchase of short-term investments (note 12) Payments to Acquire Short-Term Investments Related Party Balances and Transactions Schedule of Related Party Transactions [Table Text Block] Concentration of Credit Risk [Abstract] Concentration of Credit Risk [Abstract] Concentration of Credit Risk [Abstract] Accounts payable Increase (Decrease) in Accounts Payable Retained Earnings (Accumulated Deficit) [Abstract] Retained Earnings (Accumulated Deficit) [Abstract] Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Singapore SINGAPORE Stock-based Compensation Expense [Abstract] Share-Based Payment Arrangement, Noncash Expense [Abstract] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] RELATED PARTY BALANCES AND TRANSACTIONS Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Total inventory, net Inventory, Gross Principal repayment period Debt Instrument, Covenant, Principal Repayment Period Debt Instrument, Covenant, Principal Repayment Period Ninebell Ninebell Company Limited [Member] Name of the companies principal material supplier. REVENUE FROM CONTRACTS WITH CUSTOMERS Revenue from Contract with Customer [Text Block] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Short-term borrowings (note 8) Short-term debt Short-Term Debt Bank of Shanghai Bank of Shanghai [Member] Bank of Shanghai Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Others Other Assets, Miscellaneous, Noncurrent Line of credit up to RMB 100,000 from Citic Bank Line of credit up to RMB 100,000 from Citic Bank [Member] Line of credit up to RMB 100,000 from Citic Bank Adjustment to Compensation, Amount Adjustment to Compensation Amount Concentration risk, percentage Concentration Risk, Percentage Accrued Lingang construction fees Accrued Construction Fees, Current Accrued Construction Fees, Current Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Voting rights per share Voting Rights per Share Number of votes entitled for each share of common stock. Employee Share Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Grantee Status [Domain] Grantee Status [Domain] Other comprehensive income (loss), foreign currency translation adjustment, tax Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax Short-term investments Debt Securities, Trading, and Equity Securities, FV-NI Total ACM Research, Inc. stockholders’ equity Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Insider Trading Policies and Procedures [Line Items] Stock-based compensation expense Share-Based Payment Arrangement, Expense Common stock, shares authorized Common Stock, Shares Authorized Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Shares issued (in shares) Stock Issued During Period, Shares, New Issues Current assets: Assets, Current [Abstract] Total liabilities and equity Liabilities and Equity Fair Value, Recurring Fair Value, Recurring [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Available for sale debt securities: Available-for-Sale Securities [Member] Liabilities and equity Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Line of credit up to KRW $2,000,000 from Industrial Bank of Korea, Line Of Credit Up To KRW 2,000,000 From Industrial Bank Of Korea [Member] Line Of Credit Up To KRW 2,000,000 From Industrial Bank Of Korea Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Maximum Maximum [Member] Percentage of principal amount repaid Debt Instrument, Covenant, Percentage of Principal Amount Repaid Debt Instrument, Covenant, Percentage of Principal Amount Repaid General and administrative expense General and Administrative Expense [Member] Line of Credit Due On December 16, 2025 With An Annual Interest Rate Of 4.43% Line of Credit Due On December 16, 2025 With An Annual Interest Rate Of 4.43% [Member] Line of Credit Due On December 16, 2025 With An Annual Interest Rate Of 4.43% Less: Net income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Accounting Policies [Abstract] Accounting Policies [Abstract] Intangible assets, net Finite-Lived Intangible Assets, Net Concentration Risk Type [Domain] Concentration Risk Type [Domain] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Land, Buildings, And Plants Land, Buildings, And Plants [Member] Land, Buildings, And Plants LONG-TERM INVESTMENTS Long-term investment [Text Block] The entire disclosure for long-term investment. Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Lisa Feng [Member] Lisa Feng Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Interest income, deposits with financial institutions Interest Income, Deposits with Financial Institutions Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Land use rights period Land Use Rights Period 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. China Merchants Bank China Merchants Bank [Member] Name of the lender. Other long-term liabilities Other Liabilities, Noncurrent Deferred revenue Increase (Decrease) in Deferred Revenue Lease deposits Prepayment for Property - Lease Deposit 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. Agricultural Bank of China Agricultural Bank of China [Member] Agricultural Bank of China Company F Company F [Member] Company F Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Other payables and accrued expenses Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Four Customers Four Customers [Member] Four Customers ACM Research (Lingang), Inc. ("ACM Lingang") (1) ACM Research ( Lingang), Inc. ("ACM Lingang") [Member] ACM Research ( Lingang), Inc. ("ACM Lingang") Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Current portion of long-term borrowings (note 10) Less: Current portion Long-Term Debt, Current Maturities Company Selected Measure Amount Company Selected Measure Amount Ninebell - ACM Shanghai Ninebell - ACM Shanghai [Member] Ninebell - ACM Shanghai Less: Comprehensive income attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Table] Line of Credit Facility [Table] Short-Term Borrowings [Abstract] Short-Term Debt [Abstract] Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Line of Credit, due on September 22, 2025 with an annual interest rate of 2.5%. Line of Credit, due on September 22, 2025 with an annual interest rate of 2.5%. [Member] Line of Credit, due on September 22, 2025 with an annual interest rate of 2.5%. Comprehensive income attributable to ACM Research, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Name Measure Name Line Of Credit, China Merchants Bank, Due On March 12, 2026 With An Annual Interest Rate Of 2.28% Line Of Credit, China Merchants Bank, Due On March 12, 2026 With An Annual Interest Rate Of 2.28% 1 [Member] Line Of Credit, China Merchants Bank, Due On March 12, 2026 With An Annual Interest Rate Of 2.28% 1 Summary of Components of Stock-based Compensation Expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Current portion of operating lease liabilities Operating Lease, Liability, Current 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 Class of Stock [Line Items] Class of Stock [Line Items] Subtotal Subtotal Measurement Alternative [Member] Subtotal Measurement Alternative 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] Other payables and accrued expenses (note 9) Total Other Accounts Payable and Accrued Liabilities Realized gain on short-term investments (note 12) Marketable Security, Realized Gain (Loss) Document Fiscal Period Focus Document Fiscal Period Focus Principal payment revision period Debt Instrument, Covenant, Principal Payment Revision Period Debt Instrument, Covenant, Principal Payment Revision Period Award Timing Method Award Timing Method [Text Block] Unrealized Gain (Loss) on Trading Securities Unrealized Gain (Loss) on Investments [Table Text Block] Award Type [Axis] Award Type [Axis] Long-term debt Long-Term Debt Total assets Assets Long-Term Investments [Line Items] Long-Term Investments [Line Items] Long-Term Investments [Line Items] Investment, Name [Domain] Investment, Name [Domain] Trading Symbol Trading Symbol Cash and Cash Equivalents and Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Geographical [Domain] Geographical [Domain] 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. Ninebell Ninebell Co., Ltd [Member] Name of related party. Short-term time deposits (note 2) Deposits Assets, Current Entity Address, City or Town Entity Address, City or Town Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Unrealized gain (loss) recognized on short-term investments still held at September 30 Debt Securities, Trading, Unrealized Gain (Loss) 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 Concentration Risk Type [Axis] Concentration Risk Type [Axis] INVENTORIES, NET Inventory Disclosure [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Income Statement Location [Domain] Statement of Income Location, Balance [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Assets Assets, Fair Value Disclosure [Abstract] Statutory Accounting Practices [Line Items] Statutory Accounting Practices [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company 2028 Long-Term Debt, Maturity, Year Three Purchase of intangible assets Payments to Acquire Intangible Assets Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding 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] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] SHORT-TERM BORROWINGS Short-Term Debt [Text Block] Investment purchase price Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Company D Company D [Member] Company D Related Party Related Party [Member] Beginning balance (in shares) Ending balance (in shares) Common stock outstanding (in shares) Common Stock, Shares, Outstanding Five Customers Five Customers [Member] Five Customers Provision for credit losses Provision of credit losses Accounts Receivable, Credit Loss Expense (Reversal) Document Information [Table] Document Information [Table] PEO PEO [Member] ACCOUNTS RECEIVABLE, NET Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Disaggregated Revenue Information Disaggregation of Revenue [Table Text Block] Accrued machine sales fees Accrued Machine Sales Fees, Current Accrued Machine Sales Fees, Current Interest income Investment Income, Interest CleanChip Technologies Limited ("CleanChip") CleanChip Technologies Limited [Member] Entity owned or controlled by another entity. Income taxes payable (note 16) Accrued Income Taxes, Current United States UNITED STATES 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] Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised 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] 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. Schedule of Product Warranty Liability Schedule of Product Warranty Liability [Table Text Block] Retained Earnings Retained Earnings [Member] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Income Tax Authority [Axis] Income Tax Jurisdiction [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date 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. Share-Based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] 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 Income Statement [Abstract] Income Statement [Abstract] Income tax expense (note 16) Income tax expense Income Tax Expense (Benefit) Yusheng Micro Semiconductor (Shanghai) Co., Ltd. Yusheng Micro Semiconductor (Shanghai) Co., Ltd [Member] Yusheng Micro Semiconductor (Shanghai) Co., Ltd Class B Common Stock Common Stock Class B Common Class B [Member] Sale of Stock [Domain] Sale of Stock [Domain] Individual income tax payable Taxes Payable, Current Balance at the beginning of period Balance at the end of period Standard Product Warranty Accrual Document Information [Line Items] Document Information [Line Items] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Product and Service [Domain] Product and Service [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Property cost Property, Plant and Equipment, Gross Company B Company B [Member] Company B Purchase of long-term investments (note 11) Payments to Acquire Long-Term Investments Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Mark McKechnie [Member] Mark McKechnie Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Line of Credit, due on June 30th, 2026 with an annual interest rate of 2.11% Line of Credit, due on June 30th, 2026 with an annual interest rate of 2.11% [Member] Line of Credit, due on June 30th, 2026 with an annual interest rate of 2.11% Prepayment for investment in Ninebell (note 11) Prepayment For Equity Investment Prepayment For Equity Investment Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Cashless exercise of stock options Cashless Exercise of Stock Options Cashless exercise of stock options. Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Net proceeds from issuance of shares by ACM Shanghai Proceeds from Issuance of Private Placement Proceeds from exercise of stock options Proceeds from Stock Options Exercised City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] ACM Research Korea CO., LTD. ("ACM Korea") ACM Research Korea CO., LTD [Member] Entity owned or controlled by another entity. Accounts Receivables and Contract Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] General and administrative General and Administrative Expense Long-lived assets Long-Lived Assets Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash (used in) provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation FIN-48 payable (note 16) 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. Repayments of short-term borrowings Repayments of Short-Term Debt Long-term investments (note 11) Total Long-Term Investments Related Party Transactions [Abstract] Related Party Transactions [Abstract] ACM Research (Wuxi), Inc. ("ACM Wuxi") ACM Research (Wuxi), Inc. [Member] Entity owned or controlled by another entity. Proceeds from offering threshold Debt Instrument, Covenant, Proceeds From Offering Threshold Debt Instrument, Covenant, Proceeds From Offering Threshold Assumptions Used to Determine Fair Value of Options Granted Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Cost of revenue Cost of Sales [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Property, Plant and Equipment, Net, by Type [Abstract] Property, Plant and Equipment, Net, by Type [Abstract] ACM Shanghai ACM Research (Shanghai), Inc. ("ACM Shanghai") ACM Research (Shanghai), Inc. [Member] Entity owned or controlled by another entity. Other Assets, Noncurrent Disclosure [Abstract] Other Assets, Noncurrent Disclosure [Abstract] Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Concentration Risk [Table] Concentration Risk [Table] Number of reportable segments Number of Reportable Segments Manufacturing equipment Equipment [Member] Payments of ordinary dividends Payments of Ordinary Dividends 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] Refund of deposit for land use right Payments for (Proceeds from) Deposits on Real Estate Acquisitions Company A Company A [Member] Company A Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Other Performance Measure, Amount Other Performance Measure, Amount Inventory [Line Items] Inventory [Line Items] Entity Address, State or Province Entity Address, State or Province Related Party [Domain] Related and Nonrelated Parties [Domain] Line Of Credit, China Merchants Bank, Due On February 27, 2025 With An Annual Interest Rate Of 2.60% Line Of Credit, China Merchants Bank, Due On February 27, 2025 With An Annual Interest Rate Of 2.60% [Member] Line Of Credit, China Merchants Bank, Due On February 27, 2025 With An Annual Interest Rate Of 2.60% Total current liabilities Liabilities, Current Equity investee: Investment Excluding Other [Member] Long-term investments excluding other. Inventory [Axis] Inventory [Axis] Individual: Individual [Axis] Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Hanguk ACM CO., LTD Hanguk ACM CO., LTD. [Member] Entity owned or controlled by another entity. Other receivables Increase (Decrease) in Other Receivables 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] Research and development expense Research and Development Expense [Member] Investments [Abstract] Investments [Abstract] Net cash (used in) provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation 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] SHORT-TERM INVESTMENTS Trading Securities [Text Block] The entire disclosure for trading securities. Interest paid, net of capitalized interest Interest Paid, Excluding Capitalized Interest, Operating Activity Capital contribution by non-controlling shareholder Proceeds from Noncontrolling Interests Document Fiscal Year Focus Document Fiscal Year Focus Lender Name [Axis] Lender Name [Axis] Proceeds from disposal of long-term investments Proceeds from Sale of Long-Term Investments Operating lease right-of-use assets, net Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayments of long-term borrowings Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current 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. Cost not yet recognized (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition ACM Research (Singapore) PTE. Ltd. ("ACM Singapore") ACM Research (Singapore) PTE. LTD. [Member] Entity owned or controlled by another entity. Exercise of stock options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period ACM Research (CA), Inc. ("ACM California") ACM Research (CA), Inc. [Member] Entity owned or controlled by another entity. Stockholders’ equity: Equity [Abstract] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] 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] Shengyi Micro Semiconductor (Shanghai) Co., Ltd. Shengyi Micro Semiconductor (Shanghai) Co., Ltd. [Member] Shengyi Micro Semiconductor (Shanghai) Co., Ltd. Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Advanced Packaging (excluding ECP), Services & Spares Advanced Packaging (exclude ECP), Services & Spares [Member] Goods and Services produced, developed and distributed by the entity. Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] STATUTORY SURPLUS RESERVE Statutory Surplus Reserve [Text Block] The entire disclosure for statutory surplus reserve. Deferred tax assets (note 16) Deferred Income Tax Assets, Net Repurchase of shares held by ACM Shanghai Stock Repurchased During Period, Value Two Customers Two Customers [Member] Information by number of customers. Depreciation and amortization expense Depreciation, Depletion and Amortization Other long-term assets (note 7) Total other long-term assets Other Assets, Noncurrent Cost Debt Securities, Trading, Amortized Cost Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Customer [Domain] Customer [Domain] Entity Central Index Key Entity Central Index Key PEO Name PEO Name Schedule of Segment Reporting Information, by Segment [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Principal Payments for Outstanding Long-Term Loan Schedule of Maturities of Long-Term Debt [Table Text Block] Repurchase of ACM Shanghai's shares Payments for Repurchase of Equity 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] Finished goods Inventory, Finished Goods, Gross Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Line of credit up to RMB $200,000 from China Merchants Bank, Line of Credit up to RMB 200,000 from China Merchants Bank [Member] Line of Credit up to RMB 200,000 from China Merchants Bank Comprehensive income: Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Arrangement Duration Trading Arrangement Duration Components of Trading Securities Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Volatility maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Advances from customers Contract with Customer, Liability, Current Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Accrued warranty Product Warranty Accrual, Current Exercise Price Award Exercise Price Line Of Credit, China Merchants Bank, Due On February 28, 2025 With An Annual Interest Rate Of 2.60% Line Of Credit, China Merchants Bank, Due On February 28, 2025 With An Annual Interest Rate Of 2.60% [Member] Line Of Credit, China Merchants Bank, Due On February 28, 2025 With An Annual Interest Rate Of 2.60% Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Fair value of common share (in dollars per share) Share Price Inventory, Current [Table] Inventory, Current [Table] STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Assets Assets [Abstract] Long-term borrowings (note 10) Long-Term Debt, Excluding Current Maturities Description of Business [Abstract] Business Description [Abstract] Business Description [Abstract] Nonrelated Party Nonrelated Party [Member] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Debt Instrument [Axis] Debt Instrument [Axis] Long-Term Borrowings [Abstract] Long-Term Debt, Current and Noncurrent [Abstract] Equity: Equity, Attributable to Parent [Abstract] 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] Proceeds from short-term borrowings Proceeds from Short-Term Debt Entity Address, Address Line One Entity Address, Address Line One Long-Term Investments [Abstract] Long-Term Investments [Abstract] Research and development Research and Development Expense Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Investment, Name [Axis] Investment, Name [Axis] Less: Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Investments [Domain] Investments [Domain] Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Work-in-process Inventory, Work in Process, Gross Statutory Surplus Reserve Retained Earnings, Appropriated [Member] Fair Value as of Grant Date Award Grant Date Fair Value Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Other long-term assets Increase (Decrease) in Other Noncurrent Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [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 Schedule of Long-Term Debt Instruments [Table 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 Security deposit for land use right Security Deposit for Land Use Right Amount of security deposit for land use right paid in advance. Related Party Transaction [Line Items] Related Party Transaction [Line Items] Less: Dilutive effect arising from stock-based awards by ACM Shanghai Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities Document Quarterly Report Document Quarterly Report Total assets Assets, Fair Value Disclosure Long-term debt, fair value Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Number of operating segments Number of Operating Segments Utilized Standard Product Warranty Accrual, Decrease for Payments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Other Payables and Accrued Expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Investment Type [Axis] Investment Type [Axis] Line of Credit, due on March 20, 2025 with an annual interest rate of 2.75%. Line of Credit, due on March 20, 2025 with an annual interest rate of 2.75%. [Member] Line of Credit, due on March 20, 2025 with an annual interest rate of 2.75%. Related Party [Axis] Related and Nonrelated Parties [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Long-term time deposits (note 2) Deposits Assets, Noncurrent Line of credit up to RMB $400,000 from Bank of China, Line of Credit up to RMB 40,000 from Bank of China, [Member] Line of Credit up to RMB 40,000 from Bank of China, Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Accounts Receivable Accounts Receivable [Member] Capital contribution by non-controlling shareholder Noncontrolling Interest, Increase from Subsidiary Equity Issuance Income Taxes [Abstract] Income Tax Expense (Benefit), Continuing Operations [Abstract] Sale of Stock [Axis] Sale of Stock [Axis] Land Land [Member] Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] Schedule of Short-Term Debt [Table] Short-Term Debt [Table] Non-controlling interests Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Leasehold improvement Leasehold Improvements [Member] Others Other Noncash Income (Expense) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Expected dividend rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Revenue recognized from amounts included in contract liabilities at the beginning of the periods Contract with Customer, Liability, Revenue Recognized 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. 2029 and thereafter Long-Term Debt, Maturity, After Four and Thereafter Long-Term Debt, Maturity, After Four and Thereafter Howard Chen [Member] Howard Chen Mainland China CHINA MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Foreign corporate tax rate Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent ACM Research (Chengdu), Inc. ("ACM Chengdu") ACM Research (Chengdu), Inc. [Member] ACM Research (Chengdu), Inc. Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Deposit assets Deposit Assets Inventory [Domain] Inventory [Domain] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition OTHER LONG-TERM ASSETS Other Assets, Non-Current Disclosure [Text Block] The entire disclosure for other noncurrent assets. 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] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax 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. Sales and marketing Selling and Marketing Expense 2026 Long-Term Debt, Maturity, Year One Unrealized gain on available-for-sale investments, net of tax OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Foreign Tax Authority Foreign Tax Jurisdiction [Member] Income Statement Location [Axis] Statement of Income Location, Balance [Axis] 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 Schedule of Cash and Cash Equivalents [Table] Cash and Cash Equivalent [Table] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Inventories Increase (Decrease) in Inventories Inventories, net (note 5) Inventory, Net Minimum Minimum [Member] ACM Research (Beijing), Inc. ("ACM Beijing") ACM Research (Beijing), Inc. [Member] Entity owned or controlled by another entity. Less: Total accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Basic and Diluted Net Income per Share of Common Stock Earnings Per Share, Policy [Policy Text Block] Company Selected Measure Name Company Selected Measure Name Cash payments for procurement of goods and services Payments to Suppliers and Employees Realized gain on short-term investments Gain (Loss) on Sale of Investments Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Industrial and Commercial Bank of China Industrial and Commercial Bank of China [Member] Industrial and Commercial Bank of China Additions Standard Product Warranty Accrual, Increase for Warranties Issued Capitalized contract cost, amortization period Capitalized Contract Cost, Amortization Period Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Private Offering Private Offering [Member] Private Offering Net income available to common stockholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted All Executive Categories All Executive Categories [Member] Long-Term Investment [Line Items] Long-Term Investment [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. Common stock Common Stock, Value, Issued Line Of Credit, China Merchants Bank, Due On March 5, 2025 With An Annual Interest Rate Of 2.60% Line Of Credit, China Merchants Bank, Due On March 5, 2025 With An Annual Interest Rate Of 2.60% [Member] Line Of Credit, China Merchants Bank, Due On March 5, 2025 With An Annual Interest Rate Of 2.60% Volatility minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum ACM Shanghai ACM Shanghai [Member] Entity owned or controlled by ACM Shanghai. Short-term investments (note 12) Short-Term Investments Share-Based Payment Arrangement, Employee Share-Based Payment Arrangement, Employee [Member] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Diluted (in shares) Weighted average shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted 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. Commitments and contingencies (note 17) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Others Other [Member] Other items related to other long-term liabilities. Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Sales and marketing expense Selling and Marketing Expense [Member] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] China Hong Kong HONG KONG Non-controlling Interests Noncontrolling Interest [Member] LONG-TERM BORROWINGS Long-Term Debt [Text Block] Document Transition Report Document Transition Report Percent ownership by ACM and subsidiaries Equity Method Investment, Ownership Percentage Underlying Securities Award Underlying Securities Amount Short-Term Debt [Line Items] Short-Term Debt [Line Items] Concentration Risk [Line Items] Concentration Risk [Line Items] Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Long-Lived Assets by Geography Long-Lived Assets by Geographic Areas [Table Text Block] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount INCOME TAXES Income Tax Disclosure [Text Block] Beginning balance Ending balance Accounts Receivable, Allowance for Credit Loss Class A Common Stock Common Stock Class A Common Class A [Member] Contractual obligation Contractual Obligation Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Company C Company C [Member] Company C Operating lease liabilities Increase (Decrease) in Operating Lease Liability Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Line Of Credit, China Merchants Bank, Due On September 12, 2025 With An Annual Interest Rate Of 2.60% Line Of Credit, China Merchants Bank, Due On September 12, 2025 With An Annual Interest Rate Of 2.60% [Member] Line Of Credit, China Merchants Bank, Due On September 12, 2025 With An Annual Interest Rate Of 2.60% Document Type Document Type Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Cash and Cash Equivalent [Abstract] Cash and Cash Equivalent [Abstract] Name Outstanding Recovery, Individual Name Additional paid-in capital Additional Paid in Capital Office equipment Office Equipment [Member] Product and Service [Axis] Product and Service [Axis] Revenue (note 3) Revenues Revenue from Contract with Customer, Excluding Assessed Tax All Individuals All Individuals [Member] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] 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] Inventory provision Increase (Decrease) In Provision For Inventory Increase (Decrease) In Provision For Inventory Foreign corporate tax rate Foreign corporate tax rate Percentage of foreign tax rate. Purchase of time deposits Payments to Acquire Restricted Certificates of Deposit Other receivables Advances to related party Other Receivables, Net, Current Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Company E Company E [Member] Company E Net income available to common stockholders, basic Net Income (Loss) Available to Common Stockholders, Basic Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Current liabilities: Liabilities, Current [Abstract] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Geographical [Axis] Geographical [Axis] Total operating expenses Operating Expenses Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Risk free interest rate minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Quoted Prices in Active Markets for Identical Liabilities (Level 1) Fair Value, Inputs, Level 1 [Member] Statutory Accounting Practices [Table] Statutory Accounting Practices [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Line Of Credit, China Merchants Bank, Due On March 12, 2026 With An Annual Interest Rate Of 2.28% Line Of Credit, China Merchants Bank, Due On March 12, 2026 With An Annual Interest Rate Of 2.28% 3 [Member] Line Of Credit, China Merchants Bank, Due On March 12, 2026 With An Annual Interest Rate Of 2.28% 3 Total contract liabilities Deferred Revenue, Current Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Diluted (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Geographic Areas, Long-Lived Assets [Abstract] Geographic Areas, Long-Lived Assets [Abstract] Accounts receivable, net (note 4) Total accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Title of 12(b) Security Title of 12(b) Security Non-cash investing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Accrued commissions Accrued Sales Commission, Current Principal Payments of Long-Term Loan [Abstract] Long-Term Debt, Fiscal Year Maturity [Abstract] CITIC Bank CITIC Bank [Member] CITIC Bank 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] Shares converted Conversion of Stock, Shares Converted DESCRIPTION OF BUSINESS Business Description and Basis of Presentation [Text Block] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Line Of Credit, China Merchants Bank, Due On March 12, 2026 With An Annual Interest Rate Of 2.28% Line Of Credit, China Merchants Bank, Due On March 12, 2026 With An Annual Interest Rate Of 2.28% 2 [Member] Line Of Credit, China Merchants Bank, Due On March 12, 2026 With An Annual Interest Rate Of 2.28% 2 Gross profit Gross Profit Number of installments for loan repayable Number of Installments for Loan Repayable Number of installments for loan repayable to bank. Advances from customers Increase (Decrease) in Contract with Customer, Liability OTHER PAYABLES AND ACCRUED EXPENSES Accounts Payable and Accrued Liabilities Disclosure [Text Block] Line Of Credit, China Merchants Bank, Due On August 27, 2025 With An Annual Interest Rate Of 2.60% Line Of Credit, China Merchants Bank, Due On August 27, 2025 With An Annual Interest Rate Of 2.60% [Member] Line Of Credit, China Merchants Bank, Due On August 27, 2025 With An Annual Interest Rate Of 2.60% Effective interest held as at Subsidiaries Ownership Percentage The percentage of ownership of common stock or equity participation of subsidiaries. Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Cash paid for income taxes Income Taxes Paid, Net Everbright Bank Everbright Bank [Member] Everbright Bank Award Timing Disclosures [Line Items] Company G Company G [Member] Company G Time Deposits Time Deposits [Policy Text Block] Disclosure of accounting policy for time deposits. Inventories Schedule of Inventory, Current [Table Text Block] Accrued payroll Employee-related Liabilities, Current Measurement Frequency [Domain] Measurement Frequency [Domain] ACM Research (Cayman), Inc. ACM Research (Cayman), Inc. [Member] Entity owned or controlled by another entity. PROPERTY, PLANT AND EQUIPMENT, NET Property, Plant and Equipment Disclosure [Text Block] First-tools, Customer Ownership First-tools, Customer Ownership [Member] First-tools, Customer Ownership COMMON STOCK Equity [Text Block] ACM Shanghai dividend Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders South Korea KOREA, REPUBLIC OF Net income attributable to ACM Research, Inc. Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Others Other Accrued Liabilities, Current Prepayments for property, plant and equipment Prepayment for Property, Plant and Equipment and Other non-Current Assets 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. Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] 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] Reconciliation of cash, cash equivalents and restricted cash in condensed consolidated statements of cash flows: [Abstract] Property, plant and equipment, net (note 6) Property, plant and equipment, net (note 6) Property, Plant and Equipment, Net Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Adoption Date Trading Arrangement Adoption Date Payable for investments Payments For Investments Payments For Investments Classes of common stock outstanding Number Of Classes Of Common Stock Outstanding Number Of Classes Of Common Stock Outstanding Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Shengyi Shengyi Semiconductor Technology Company Limited [Member] Name of the companies components suppliers. Ninebell Ninebell Company Limited, ACM Shanghai [Member] Ninebell Company Limited, ACM Shanghai Deferred revenue Deferred Income, Current Entity Current Reporting Status Entity Current Reporting Status Long-Term Investment Long-Term Investment [Table Text Block] Tabular disclosure of long-term investment. Shengyi Shengyi [Member] Shengyi Receivables [Abstract] Receivables [Abstract] Customer [Axis] Customer [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Income from operations Operating Income (Loss) Consolidated Entities [Domain] Consolidated Entities [Domain] Retained earnings Retained Earnings (Accumulated Deficit) Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] 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] Executive Category: Executive Category [Axis] Shengyi Shengyi Semiconductor Technology Co., Ltd [Member] Name of related party. Proceeds from long-term borrowings Proceeds from Issuance of Long-Term Debt Current Fiscal Year End Date Current Fiscal Year End Date Class of Stock [Axis] Class of Stock [Axis] Haiping Dun [Member] Haiping Dun Expected term Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Advances to related parties (note 13) Increase (Decrease) in Due to Related Parties 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] Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Payables and Accruals [Abstract] Payables and Accruals [Abstract] Other expense, net Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Deferred income taxes Deferred Income Tax Expense (Benefit) Adjustments to reconcile net income to net cash (used in) provided by operating activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Revenue Benchmark Revenue Benchmark [Member] Dividends from unconsolidated affiliates Proceeds from Equity Method Investment, Distribution Line of Credit, due on April 14th, 2026 with an annual interest rate of 2.3% Line of Credit, due on April 14th, 2026 with an annual interest rate of 2.3% [Member] Line of Credit, due on April 14th, 2026 with an annual interest rate of 2.3% Unrecognized tax benefits Unrecognized Tax Benefits Weighted average shares of common stock outstanding used in computing per share amounts (note 2): Weighted Average Number of Shares Outstanding, Diluted [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag 2027 Long-Term Debt, Maturity, Year Two Termination Date Trading Arrangement Termination Date Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Related parties accounts payable (note 13) Increase (Decrease) in Due from Related Parties Basic (in shares) Weighted average shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Inventory write-down Inventory Write-down Basic and Diluted Net Income per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Cost of revenue, including cost of revenue from related parties of $19,293 and $45,209 for the three and nine months ended September 30, 2025, respectively, and $11,607 and $28,474 for the three and nine months ended September 30, 2024, respectively (note 13) Cost of revenue, related party Cost of Revenue Statutory surplus reserve (note 19) Statutory accounting practices, statutory capital and surplus, balance Statutory Accounting Practices, Statutory Capital and Surplus, Balance Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Interest or penalties Income Tax Examination, Penalties and Interest Expense Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Non-cash financing activities: Other Noncash Investing and Financing Items [Abstract] STATUTORY SURPLUS RESERVE [Abstract] STATUTORY SURPLUS RESERVE [Abstract] STATUTORY SURPLUS RESERVE [Abstract] Entity Tax Identification Number Entity Tax Identification Number Share-Based Payment Arrangement, Nonemployee Share-Based Payment Arrangement, Nonemployee [Member] Grantee Status [Axis] Grantee Status [Axis] Line Of Credit, China Merchants Bank, Due On March 8, 2025 With An Annual Interest Rate Of 2.60% Line Of Credit, China Merchants Bank, Due On March 8, 2025 With An Annual Interest Rate Of 2.60% [Member] Line Of Credit, China Merchants Bank, Due On March 8, 2025 With An Annual Interest Rate Of 2.60% Write-offs Accounts Receivable, Allowance for Credit Loss, Writeoff Net gains realized on short-term investments Debt Securities, Trading, Realized Gain (Loss) Inventory, Net [Abstract] Inventory, Net [Abstract] Transportation equipment Transportation Equipment [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par or stated value per share Common Stock, Par or Stated Value Per Share Consolidated Entities [Axis] Consolidated Entities [Axis] Common stock issued (in shares) Common Stock, Shares, Issued Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Use of Estimates Use of Estimates, Policy [Policy Text Block] Bank of China Bank of China [Member] Name of the lender. Construction in progress Construction in Progress, Gross Fuping Chen [Member] Fuping Chen Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Income taxes payable Increase (Decrease) in Income Taxes Payable Total Shareholder Return Amount Total Shareholder Return Amount Income Taxes [Table] Income Taxes [Table] Disclosure of information about income taxes. Other Long-term Assets Schedule of Other Assets, Noncurrent [Table Text Block] 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 Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Purchase of materials Related Party Transaction, Purchases from Related Party 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. Remainder of 2025 Long-Term Debt, Maturity, Remainder of Fiscal Year Raw materials Inventory, Raw Materials, Gross Total liabilities Liabilities ACM Shanghai dividend Payments of Ordinary Dividends, Noncontrolling Interest Unrealized gain (loss) on short-term investments (note 12) Unrealized (gain) loss on short-term investments Marketable Security, Unrealized Gain (Loss) Wooil Wooil Flucon Company Limited [Member] Name of the companies components suppliers. Accounts Receivable [Abstract] Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] Long-Term Debt, by Current and Noncurrent [Abstract] Long-Term Debt, by Current and Noncurrent [Abstract] Purchases of property, plant and equipment through other payables and accrued expenses Capital Expenditures Incurred but Not yet Paid Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] ACM-Wooil Microelectronics (Shanghai) Co., Ltd. ACM-Wooli Microelectronics (Shanghai) Co., Ltd [Member] ACM-Wooli Microelectronics (Shanghai) Co., Ltd Operating expenses: Operating Expenses [Abstract] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Total net gain (loss) recognized on short-term investments Debt Securities, Trading, Gain (Loss) Line of credit facility, interest rate during period Line of Credit Facility, Interest Rate During Period Transfer from inventories to property, plant and equipment Transfer From Inventory To Property, Plant And Equipment Transfer From Inventory To Property, Plant And Equipment Issuance of shares by ACM Shanghai Stock Issued During Period, Value, New Issues Investments accounted for using measurement alternative: Other Long-Term Investments [Member] Statement [Line Items] Statement [Line Items] Hefei Shixi Hefei Shixi Chanheng Integrated Circuit Industry Venture Capital Fund Partnership [Member] Name of the companies a Chinese limited partnership. Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Counterparty Name [Axis] Counterparty Name [Axis] Disaggregated Revenue Information [Abstract] Disaggregated Revenue Information [Abstract] Disaggregated Revenue Information [Abstract] Risk free interest rate maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Common Stock Common Stock [Member] Available-for-sale debt securities Debt Securities, Available-for-Sale Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] 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 Effect of dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment