Significant Accounting Policies Significant Accounting Policies [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Base rent Lessee, Operating Sublease, Base Rent Lessee, Operating Sublease, Base Rent Settled Litigation Settled Litigation [Member] Award Timing Predetermined Award Timing Predetermined [Flag] Related Party Transaction [Axis] Related Party Transaction [Axis] Maximum contribution amount Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Amount Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Amount Entity File Number Entity File Number Additional Paid-in- Capital Additional Paid-in Capital [Member] General and administrative expense General And Administrative Expense, Adjusted General And Administrative Expense, Adjusted Tabular List, Table Tabular List [Table Text Block] Leases [Abstract] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Probability Of Success Measurement Input, Probability Of Success [Member] Measurement Input, Probability Of Success Accounts payable Increase (Decrease) in Accounts Payable 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 Transactions Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Prepaid insurance Prepaid Insurance, Noncurrent Prepaid Insurance, Noncurrent Prepaid software Prepaid Software, Current Prepaid Software, Current Liabilities Liabilities, Fair Value Disclosure [Abstract] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Discount Rate Measurement Input, Discount Rate [Member] Issuance of common stock-ESPP (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Vesting of restricted stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Measurement Input Type [Domain] Measurement Input Type [Domain] Number Of Reportable Segments, Not Disclosed Flag Number Of Reportable Segments, Not Disclosed Flag Number Of Reportable Segments, Not Disclosed Flag Adjustment to Compensation, Amount Adjustment to Compensation Amount Redwood City, California Redwood City, California [Member] Redwood City, California Principles of Consolidation Consolidation, Policy [Policy Text Block] Employee Stock Option Options to purchase common stock 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] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Total stockholders’ equity Beginning balance Ending balance Equity, Attributable to Parent Insider Trading Policies and Procedures [Line Items] Schedule of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Current assets: Assets, Current [Abstract] Total liabilities and stockholders’ equity Liabilities and Equity Milestone Seven Milestone Seven [Member] Milestone Seven Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Maximum Maximum [Member] Accounting Policies [Abstract] Unpaid rent payments Lessee, Operating Sublease, Unpaid Rent Payments Lessee, Operating Sublease, Unpaid Rent Payments Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Significant segment expenses: Segment Reporting Information, Operating Income (Loss) [Abstract] 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] Non-employee Director Non-employee Director [Member] Non-employee Director [Member] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Total financial liabilities Financial Liabilities Fair Value Disclosure Net (loss) income before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Former Employee Vs Exicure, Inc Former Employee Vs Exicure, Inc [Member] Former Employee Vs Exicure, Inc Statement of Stockholders' Equity [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Measurement Input Type [Axis] Measurement Input Type [Axis] Name Measure Name Current lease liability Operating Lease, Liability, Current Base rent percentage increase Lessee, Operating Sublease, Base Rent, Increase, Percentage Lessee, Operating Sublease, Base Rent, Increase, Percentage Class of Stock [Line Items] Class of Stock [Line Items] Deferred tax liability Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Award Timing Method Award Timing Method [Text Block] Litigation Case [Domain] Litigation Case [Domain] Furniture and fixtures Furniture and Fixtures [Member] Milestone Five Milestone Five [Member] Milestone Five Award Type [Axis] Award Type [Axis] Legal Entity [Axis] Legal Entity [Axis] Total assets Assets Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] Equity-based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture 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] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Restricted stock units Restricted Stock Units (RSUs) [Member] Area of sublease Lessee, Operating Sublease, Lease Area Lessee, Operating Sublease, Lease Area Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Milestone [Domain] Milestone [Domain] Milestone [Domain] Entity Emerging Growth Company Entity Emerging Growth Company Warrants to purchase common stock Warrant [Member] Entity Common Stock, Shares Outstanding (in shares) 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] Level 2 Fair Value, Inputs, Level 2 [Member] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Contingent consideration assumed in the GPCR USA acquisition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Business Combination [Domain] Business Combination [Domain] Related Party Related Party [Member] Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Gain on early lease termination Gain on termination of lease Gain on lease termination Gain (Loss) on Termination of Lease Plan Name [Axis] Plan Name [Axis] PEO PEO [Member] Interest income Investment Income, Interest 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] 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] Accumulated Deficit Retained Earnings [Member] Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Schedule of Accrued expenses and other current liabilities Schedule of Accrued Liabilities [Table Text Block] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-Based Payment Arrangement [Abstract] Cash and cash equivalents - beginning of period Cash and cash equivalents - end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Provision for income taxes Provision for income taxes Income Tax Expense (Benefit) Sale of Stock [Domain] Sale of Stock [Domain] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Intangible asset Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Property and equipment, gross Property, Plant and Equipment, Gross Milestone One Milestone One [Member] Milestone One Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Biotechnology Segment Biotechnology Segment [Member] Biotechnology Segment Amortization of right-of-use asset Operating Lease, Right-of-Use Asset, Periodic Reduction Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] City Area Code City Area Code Acquisition of GPCR Therapeutics USA Inc. Payments to Acquire Businesses, Net of Cash Acquired Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Gain on settlement of accounts payables Gain on settlement of accounts payables Gain (Loss) On Settlement Of Accounts Payable Gain (Loss) On Settlement Of Accounts Payable 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] Non-cash investing activities: Cash Flow, Noncash Investing Activities Disclosure [Abstract] Cash Flow, Noncash Investing Activities Disclosure Accrued expenses and other current liabilities Accrued expenses and other current liabilities Accrued Liabilities, Current Number of additional shares allowable annually under the plan (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Allowable Under The Plan Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Allowable Under The Plan Commitments and Contingencies Disclosure [Abstract] Milestone Two Milestone Two [Member] Milestone Two Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] General and administrative expense General and Administrative Expense Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Related Party Transactions [Abstract] Net (loss) income per share: Earnings Per Share Basic And Dilutd [Abstract] Earnings Per Share Basic And Dilutd Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Auto Automobiles [Member] Goodwill Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Estimate of possible loss Loss Contingency, Estimate of Possible Loss PEO Total Compensation Amount PEO Total Compensation Amount 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] Initial Employee Stock Option Initial Employee Stock Option [Member] Initial Employee Stock Option [Member] Contingent Consideration Contingent Consideration [Member] Contingent Consideration Measurement input Business Combination, Contingent Consideration, Liability, Measurement Input Scientific equipment Equipment [Member] Lease security deposit Operating Lease, Security Deposit Operating Lease, Security Deposit Supplemental disclosure of cash flow information Supplemental Cash Flow Information [Abstract] Other Performance Measure, Amount Other Performance Measure, Amount Entity Address, State or Province Entity Address, State or Province Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Related Party [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current Litigation Status [Axis] Litigation Status [Axis] License and Collaboration Agreement License And Collaboration Agreement [Member] License And Collaboration Agreement Individual: Individual [Axis] Vesting [Axis] Vesting [Axis] Other receivable Increase (Decrease) in Other Receivables Entity [Domain] Entity [Domain] Prepaid professional fees Prepaid Professional Fees, Current Prepaid Professional Fees, Current Net cash used in 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] Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Right of use asset Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Effective tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Property and equipment wrote off Property, Plant and Equipment, Disposals Entity Interactive Data Current Entity Interactive Data Current Milestone Three Milestone Three [Member] Milestone Three Plan Name [Domain] Plan Name [Domain] Equity [Abstract] Segment Reporting Segment Reporting Disclosure [Text Block] 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] Property, Plant and Equipment, Type [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] Contingent consideration Business Combination, Contingent Consideration, Liability Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Other noncurrent assets Other Assets, Noncurrent Entity Central Index Key Entity Central Index Key PEO Name PEO Name Total revenue Total revenue Revenues 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] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Beginning balance, as of January 1, 2025 Ending balance, as of March 31, 2026 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Chicago Chicago [Member] Chicago Contingent consideration Business Combination, Contingent Consideration, Liability, Noncurrent Arrangement Duration Trading Arrangement Duration Share-based Compensation Award, Tranche One Share-Based Payment Arrangement, Tranche One [Member] Segments [Axis] Segments [Axis] Exercise price (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Exercise Price Award Exercise Price Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Equity-Based Compensation Share-Based Payment Arrangement [Text Block] Sublease term Lessee, Operating Sublease, Term Lessee, Operating Sublease, Term Accrued contingent consideration, current portion Business Combination, Contingent Consideration, Liability, Current Milestone Six Milestone Six [Member] Milestone Six ASSETS Assets [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Vesting [Domain] Vesting [Domain] Fair Value Measurements Fair Value Disclosures [Text Block] Stockholders’ 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] Vesting percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Number of additional shares authorized, potential maximum additional shares (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized, Potential Maximum Additional Shares Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized, Potential Maximum Additional Shares Research and development expense Research and Development Expense Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Reclass prepaid expenses from noncurrent to current Noncash, Reclassification Of Prepaid Expenses From Noncurrent To Current Noncash, Reclassification Of Prepaid Expenses From Noncurrent To Current Depreciation and amortization Depreciation, Amortization and Accretion, Net Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Dilutive effect of options, restricted stock units and warrants (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Title and Position [Domain] Title and Position [Domain] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Document Quarterly Report Document Quarterly Report Summary of Assumptions Utilized in Valuation of Level 3 Liabilities Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Number of operating segments Number of Operating Segments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Current Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Current 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 Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Schedule of Prepaid and Other Current Assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Schedule of Contingent Consideration Measured at Fair Value on Recurring Basis Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Sale of Stock [Axis] Sale of Stock [Axis] Consulting Agreement, Monthly Payment Amount Consulting Agreement, Monthly Payment Amount [Member] Consulting Agreement, Monthly Payment Amount Contingent consideration, milestone payment Business Combination, Contingent Consideration, Milestone Payment Business Combination, Contingent Consideration, Milestone Payment Name Trading Arrangement, Individual Name Award Type [Domain] Award Type [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Leasehold Improvements Leasehold Improvements [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Common stock, voting rights for each share Common Stock, Voting Rights for Each Share Common Stock, Voting Rights for Each Share Compensation Amount Outstanding Recovery Compensation Amount Net (loss) income per common share: Earnings Per Share, Basic And Diluted EPS [Abstract] Earnings Per Share, Basic And Diluted EPS Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Exicure OpCo 2015 Equity Incentive Plan Exicure OpCo 2015 Equity Incentive Plan [Member] Exicure OpCo 2015 Equity Incentive Plan [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Change in fair value of contingent liability Change in fair value of contingent consideration Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Employee Stock Employee Stock [Member] Revenue: Revenues [Abstract] Maximum number of shares per employee in purchase period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Per Employee Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Litigation Case [Axis] Litigation Case [Axis] Liability Class [Axis] Liability Class [Axis] Segments [Domain] Segments [Domain] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Minimum Minimum [Member] Number of shares called by warrants (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Less: accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Company Selected Measure Name Company Selected Measure Name Preferred stock, $0.0001 par value per share; 10,000,000 shares authorized, no shares issued and outstanding, March 31, 2026 and December 31, 2025 Preferred Stock, Value, Issued Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Net (loss) income Net Income (Loss) Available to Common Stockholders, Diluted All Executive Categories All Executive Categories [Member] Common stock, $0.0001 par value per share; 200,000,000 shares authorized, 6,373,915 issued and outstanding, March 31, 2026; 6,373,893 issued and outstanding, December 31, 2025 Common Stock, Value, Issued Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Share-based Compensation Award, Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Title and Position [Axis] Title and Position [Axis] Diluted (in shares) Weighted-average diluted common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Commitments and Contingencies (Note 11) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Business Combination [Axis] Business Combination [Axis] Other Other Prepaid Expense, Current Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Milestone [Axis] Milestone [Axis] Milestone PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Income Taxes Income Tax Disclosure [Text Block] Supplemental Balance Sheet Information Supplemental Balance Sheet Disclosures [Text Block] Consulting Agreement, Amount Paid Consulting Agreement, Amount Paid [Member] Consulting Agreement, Amount Paid Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Scenario [Axis] Scenario [Axis] Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] (Loss) Income Per Common Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Additional paid-in capital Additional Paid in Capital Proceeds from common stock offering Proceeds from Issuance of Common Stock Revenue Revenue from Contract with Customer, Excluding Assessed Tax Litigation Status [Domain] Litigation Status [Domain] Supplemental Balance Sheet Information [Abstract] Supplemental Balance Sheet Information [Abstract] All Individuals All Individuals [Member] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Expiration period Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period 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] Loss contingency accrual Loss Contingency Accrual GPCR USA GPCR USA [Member] GPCR USA Basic (in shares) Weighted Average Number of Shares Issued, Basic Percentage of outstanding shares allowable as annual increase Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum Number of additional shares authorized, percentage of common stock outstanding Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized, Percentage of Common Stock Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized, Percentage of Common Stock Outstanding Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount ESPP purchase price as a percentage of market price Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Increase in number of shares available for grant Share-based Compensation Arrangement by Share-based Payment Award, Increase In Number of Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Increase In Number of Shares Available for Grant Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net (loss) income Net Income (Loss) Available to Common Stockholders, Basic Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Summary of Operating Financial Results Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Current liabilities: Liabilities, Current [Abstract] Geographical [Axis] Geographical [Axis] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Total operating expenses Operating Expenses Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Level 1 Fair Value, Inputs, Level 1 [Member] Accrued expenses Increase (Decrease) in Accrued Liabilities 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 Forecast Forecast [Member] Offering period duration Share-Based Compensation Arrangement By Share-based Payment Award, Offering Period Share-Based Compensation Arrangement By Share-based Payment Award, Offering Period Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Prepaid insurance Prepaid Insurance Accrued registration delay payments Accrued Registration Delay Payments, Current Accrued Registration Delay Payments, Current Earnings Per Share [Abstract] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Description of Business, Basis of Presentation and Going Concern Business Description and Basis of Presentation [Text Block] Total other (expense) income, net Nonoperating Income (Expense) Schedule of Antidilutive Securities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Subsequent Employee Stock Option Subsequent Employee Stock Option [Member] Subsequent Employee Stock Option [Member] Transaction term Related Party Transaction, Term Related Party Transaction, Term Award Timing Disclosures [Line Items] Accrued payroll-related expenses Employee-related Liabilities, Current Stockholders' Equity Equity [Text Block] Net (loss) income Net (loss) income Net income (loss) Net income Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Pending Litigation Pending Litigation [Member] Accrued other expenses Other Accrued Liabilities, Current Amount of transaction Related Party Transaction, Amounts of Transaction Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Adoption Date Trading Arrangement Adoption Date Reclassification Reclassification, Comparability Adjustment [Policy Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Entity Current Reporting Status Entity Current Reporting Status Number of lawsuits filed Loss Contingency, Number Of Lawsuits Filed Loss Contingency, Number Of Lawsuits Filed Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Operating (loss) income Operating Income (Loss) Accumulated deficit Retained Earnings (Accumulated Deficit) Computers and software Computers and Software [Member] Computers and Software [Member] Loss on disposal of assets Gain (Loss) on Disposition of Property Plant Equipment 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] Accrued litigation and legal fees Loss Contingency, Accrual, Current Current Fiscal Year End Date Current Fiscal Year End Date Dividend income Investment Income, Dividend 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] Number of shares available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Statement [Table] Statement [Table] Maximum ESPP contribution rate as a percentage of compensation Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Employee Subscription Rate Adjustments to reconcile net loss to cash used in 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] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Potentially dilutive shares excluded from computation of weighted-average diluted common shares outstanding (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Other receivable Other Receivables, Gross, Current Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Number of shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Leases Lessee, Operating Leases [Text Block] Termination Date Trading Arrangement Termination Date Net cash provided by 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] Weighted-average basic common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Vesting of restricted stock units Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Schedule of Computation of Loss per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Related Party Transaction [Domain] Related Party Transaction [Domain] Subsequent Events [Abstract] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Other (expense) income, net: Nonoperating Income (Expense) [Abstract] Entity Tax Identification Number Entity Tax Identification Number Scenario [Domain] Scenario [Domain] Colwell v. Exicure Colwell v. Exicure [Member] Colwell v. Exicure 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 value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued (in shares) Common Stock, Shares, Issued Use of Estimates Use of Estimates, Policy [Policy Text Block] Settlement amount awarded Litigation Settlement, Amount Awarded to Other Party Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Self insured retainer amount Loss Contingency, Self Insured Retention Retainer Amount Loss Contingency, Self Insured Retention Retainer Amount Schedule of Other Noncurrent Assets Schedule of Other Assets, Noncurrent [Table Text Block] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Change in fair value of contingent consideration Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Subsequent Event Subsequent Events [Text Block] Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Interest and dividend income Investment Income, Interest and Dividend Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Milestone payment Payment For Contingent Consideration Liability Payment For Contingent Consideration Liability Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Operating expenses: Operating Expenses [Abstract] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Milestone Four Milestone Four [Member] Milestone Four Statement [Line Items] Statement [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Exicure, Inc. 2017 Equity Incentive Plan Exicure, Inc. 2017 Equity Incentive Plan [Member] Exicure, Inc. 2017 Equity Incentive Plan [Member] Common Stock Common Stock [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Net decrease in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation