Document and Entity Information Document Information [Table] Document Information [Line Items] Document and Entity Information Document Type Document Period End Date Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Document Fiscal Period Focus Document Fiscal Year Focus Amendment Flag CONDENSED CONSOLIDATED BALANCE SHEETS Statement [Table] Statement [Line Items] Statement Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current, Total Due from Related Parties, Current Amounts due from related parties Other Receivable, after Allowance for Credit Loss, Current, Related Party, Type [Extensible Enumeration] Prepaid Expense and Other Assets, Current Prepayments and other current assets Prepayments and other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property, equipment and software, net Net book value Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Other Assets, Noncurrent Other non-current assets Assets TOTAL ASSETS LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Accounts Payable, Current Accounts payable Contract with Customer, Liability, Current Contract liabilities Other Liabilities, Current Amounts due to related parties Other Liability, Current, Related Party, Type [Extensible Enumeration] Accrued Liabilities and Other Current Liabilities Accrued Liabilities and Other Current Liabilities Accruals and other current liabilities Accruals and other current liabilities Income Tax Payable Income tax payable Warrants and Rights Outstanding Warrant liabilities Short-term Bank Loans and Notes Payable Short-term borrowings Bank loans Long-term Debt, Current Maturities Current portion of long-term borrowings Current portion of long-term borrowings Operating Lease, Liability, Current Current portion of operating lease liabilities Current portion of operating lease liabilities Liabilities, Current Total current liabilities Long-term Debt, Excluding Current Maturities Long-term borrowings Total non-current borrowings Operating Lease, Liability, Noncurrent Operating lease liabilities Operating lease liabilities Liabilities TOTAL LIABILITIES Commitments and Contingencies. Commitments and contingencies CONTINGENTLY REDEEMABLE CONVERTIBLE PREFERRED SHARES Mezzanine equity: Temporary Equity, Carrying Amount, Attributable to Parent Series A non-voting contingently redeemable convertible preferred shares (par value of US$0.0001 per share; and 1,062,500 shares authorized, issued and outstanding as of December 31, 2025 and June 30, 2026, respectively) Shareholders' equity (deficit): Shareholders' equity: Common Stock, Value, Issued Ordinary shares (par value of US$0.0001 per share; 640,000,000 shares authorized, and 59,231,993 shares issued and outstanding as of December 31, 2025; and 640,000,000 shares authorized, and 83,929,180 shares issued and outstanding as of June 30, 2026) Additional Paid in Capital. Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Accumulated deficit Stockholders' Equity Attributable to Parent Balance at the end Balance at the beginning Total shareholders' equity Liabilities and Equity TOTAL LIABILITIES, MEZZANINE EQUITY AND SHAREHOLDERS' EQUITY Temporary Equity, Par or Stated Value Per Share Convertible redeemable preferred shares, par value Temporary Equity, Shares Authorized Convertible redeemable preferred shares, shares authorized Temporary Equity, Shares Issued Convertible redeemable preferred shares, shares issued Temporary Equity, Shares Outstanding Convertible redeemable preferred shares, shares outstanding Common Stock, Par or Stated Value Per Share Ordinary shares, par value Common Stock, Shares Authorized Ordinary shares, shares authorized Common Stock, Shares, Issued Ordinary shares, shares issued Common Stock, Shares, Outstanding Ordinary shares, shares outstanding CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS Cost of Revenue [Abstract] Revenue Revenue from Contract with Customer, Excluding Assessed Tax Revenues Licensing and collaboration revenue Operating expenses and income Research and Development Expense Research and development expenses Total research and development expenses General and Administrative Expense Administrative expenses Operating Income (Loss) Loss from operations Investment Income, Interest Interest and investment income Interest Expense Interest expense Other Nonoperating Income Other income, net Foreign Currency Transaction Gain (Loss), before Tax Foreign exchange loss (gain), net Foreign exchange gain (loss), net Fair Value Adjustment of Warrants Change in fair value of warrant liabilities Change in fair value of warrant liabilities Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Loss before income tax Loss before income tax Income Tax Expense (Benefit) Income tax benefit (expense) Net Income (Loss) Attributable to Parent Net loss attributable to Adagene Inc.'s shareholders Net loss attributable to Adagene Inc.'s shareholders Net loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustments, net of nil tax Other comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive loss attributable to Adagene Inc.'s shareholders Net Income (Loss) Available to Common Stockholders, Basic Net loss attributable to ordinary shareholders, basic Net loss attributable to ordinary shareholders Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average number of ordinary shares used in per share calculation: Denominator: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted-average number of ordinary shares outstanding-basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Weighted-average number of ordinary shares outstanding-diluted (in shares) NET LOSS PER SHARE Net loss per ordinary share Earnings Per Share, Basic Basic (in dollars per share) Net Loss per share-basic Earnings Per Share, Diluted Diluted (in dollars per share) Net Loss per share- diluted Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent Foreign currency translation adjustments, tax CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY Equity Components [Axis] Equity Component [Domain] Common Stock [Member] Ordinary shares Ordinary shares Additional Paid-in Capital [Member] Additional paid-in capital AOCI Attributable to Parent [Member] Accumulated other comprehensive loss Retained Earnings [Member] Accumulated deficit Sale of Stock [Axis] Sale of Stock [Domain] Represents information pertaining to underwritten public offering. Underwritten Public Offering [Member] Underwritten Public Offering Underwritten public offering Represents information pertaining to ATM offering. ATM Offering [Member] ATM Offering Increase (Decrease) in Stockholders' Equity [Roll Forward] CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY Shares, Issued Balance at the end (in shares) Balance at the beginning (in shares) Stock Issued During Period, Value, Stock Options Exercised Exercise of share options (Note 10) Total amount exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised (in shares) Exercise of share options (Note 10) (in shares) Shares issued upon exercise of share options (in shares) Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Share-based compensation (Note 10) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Share-based compensation (Note 10) (in shares) Stock Issued During Period, Value, New Issues Issuance of ordinary shares Stock Issued During Period, Shares, New Issues Number of shares issued Issuance of ordinary shares (in shares) CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Cash flows from operating activities: Cash flows from operating activities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to reconcile net loss to net cash used in operating activities: Amount of income or gain included in net income that result in no cash inflow (outflow) from short term investments. Noncash Investment Income Income related to short-term investments Depreciation, Depletion and Amortization Depreciation and amortization The amount of loss on disposal of property, equipment, software and operating lease right-of-use asset. Gain Loss On Sale Of Property Plant Equipment and Operating Lease Right Of Use Asset Net loss (gain) on disposal of property, equipment, software and operating lease right-of-use asset Share-based Payment Arrangement, Noncash Expense Share-based compensation Amount of amortization expense for right-of-use asset and interest of lease liabilities from operating lease. Operating Lease, Right-of-Use Asset and Interest of Lease Liabilities, Amortization Expense Amortization of right-of use assets and interest of lease liabilities Changes in operating assets and liabilities: Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable, net Increase (Decrease) in Prepaid Expense and Other Assets Prepayments and other current assets Increase (Decrease) in Due from Related Parties Amount due from related parties Increase (Decrease) in Other Noncurrent Assets Other non-current assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Contract with Customer, Liability Contract liabilities Increase (Decrease) in Due to Related Parties Amount due to related parties Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Accruals and other current liabilities Increase (Decrease) in Operating Lease Liability Lease liabilities Increase (Decrease) in Income Taxes Payable Income tax payable Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Cash flows from investing activities: Cash flows from investing activities: Payments to Acquire Short-term Investments Placement of short-term investments Proceeds from Sale of Short-term Investments Withdrawal of short-term investments Proceeds from Sale of Productive Assets Proceeds from disposal of property, equipment and software Payments to Acquire Productive Assets Purchase of property, equipment and software Net Cash Provided by (Used in) Investing Activities Net cash generated from investing activities Cash flows from financing activities: Cash flows from financing activities: Proceeds from Stock Options Exercised Proceeds from exercise of share options Sale of Stock, Consideration Received on Transaction Proceeds from issuance of the Offering, net of issuance costs Repayments of Debt Repayment of borrowings Amount repaid Net Cash Provided by (Used in) Financing Activities Net cash generated from (used in) financing activities Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Effect of exchange rate on cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net decrease (increase) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents at the end of the period Cash and cash equivalents at the beginning of the period Supplemental cash flow disclosures: Supplemental cash flow disclosures: Interest Paid, Excluding Capitalized Interest, Operating Activities Interest paid Income Taxes Paid, Net Income tax paid Operating Lease, Payments Cash paid for fixed operating lease costs included in the measurement of lease obligations in operating activities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-use assets obtained in exchange for operating lease obligations ORGANIZATION AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] ORGANIZATION AND BASIS OF PRESENTATION SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES ACCOUNTS RECEIVABLE, NET Loans, Notes, Trade and Other Receivables Disclosure [Text Block] ACCOUNTS RECEIVABLE, NET PREPAYMENTS AND OTHER CURRENT ASSETS The entire disclosure on prepayments and other current assets. Prepaid Expense and Other Assets, Current [Text Block] PREPAYMENTS AND OTHER CURRENT ASSETS PROPERTY, EQUIPMENT AND SOFTWARE, NET Property, Plant and Equipment Disclosure [Text Block] PROPERTY, EQUIPMENT AND SOFTWARE, NET No definition available. ACCRUALS AND OTHER CURRENT LIABILITIES The entire disclosure on accrued liabilities and other current liabilities. Accrued Liabilities and Other Current Liabilities [Text Block] ACCRUALS AND OTHER CURRENT LIABILITIES BORROWINGS BORROWING BORROWINGS SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] SEGMENT INFORMATION The entire disclosure pertaining to temporary equity. Temporary Equity [Text Block] CONTINGENTLY REDEEMABLE CONVERTIBLE PREFERRED SHARES SHARE-BASED COMPENSATION Share-based Payment Arrangement [Text Block] SHARE-BASED COMPENSATION WARRANT LIABILITIES The entire disclosure for warrants or rights. Warrants and Rights Note Disclosure [Text Block] WARRANT LIABILITIES No definition available. COLLABORATION ARRANGEMENTS Collaborative Arrangement Disclosure [Text Block] COLLABORATION ARRANGEMENTS INCOME TAX BENFIT (EXPENSE) Income Tax Disclosure [Text Block] INCOME TAX BENFIT (EXPENSE) Earnings Per Share [Text Block] NET LOSS PER SHARE RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] RELATED PARTY TRANSACTIONS LEASES Lessee, Operating Leases [Text Block] LEASES COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES ORDINARY SHARES Equity [Text Block] ORDINARY SHARES Basis of Accounting, Policy [Policy Text Block] Basis of presentation Consolidation, Policy [Policy Text Block] Principles of Consolidation Use of Estimates, Policy [Policy Text Block] Use of estimates Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign currency translation Cash and Cash Equivalents, Policy [Policy Text Block] Cash and cash equivalents Investment, Policy [Policy Text Block] Short-term investments Accounts Receivable [Policy Text Block] Accounts receivable and allowance for doubtful accounts Fair Value Measurement, Policy [Policy Text Block] Fair value measurements Property, Plant and Equipment, Policy [Policy Text Block] Property, equipment and software Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Impairment of long-lived assets Revenue from Contract with Customer [Policy Text Block] Revenue recognition Research and Development Expense, Policy [Policy Text Block] Research and development expenses Disclosure of accounting policy for government subsidies. Government Subsidies [Policy Text Block] Government subsidies Lessee, Leases [Policy Text Block] Leases Comprehensive Income, Policy [Policy Text Block] Comprehensive income (loss) Income Tax, Policy [Policy Text Block] Income taxes Debt, Policy [Policy Text Block] Borrowings Share-based Payment Arrangement [Policy Text Block] Share-based compensation Earnings Per Share, Policy [Policy Text Block] Net loss per share