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Document Fiscal Period Focus Document Fiscal Period Focus Revenue from Contract with Customer [Abstract] Share based compensation expense Share Based Compensation Expense Share based compensation expense Entity Shell Company Entity Shell Company Cash and Cash Equivalents, at Carrying Value, Ending Balance Cash and Cash Equivalents, at Carrying Value, Beginning Balance Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Cash and Cash Equivalent Discontinued Operations [Member] Discontinued Operations Grants. 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Asset Class [Domain] Statement [Table] Statement [Table] Prepaid expenses Increase (Decrease) in Prepaid Expense Prepaid expenses Accumulated other comprehensive loss AOCI Including Portion Attributable to Noncontrolling Interest [Member] Weighted average grant date fair value per option share Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Proceeds from at the Offer Proceeds from at the offer. Proceeds from ATM Statement [Line Items] Statement [Line Items] Revenue from Contract with Customer [Policy Text Block] Revenue Development Milestone Payment Development milestone payment. Development milestone payment Entity Filer Category Entity Filer Category Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of Shares Total liabilities and stockholders' equity Liabilities and Equity Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Restructuring Type Restructuring Type [Axis] Long-Lived Tangible Asset Long-Lived Tangible Asset [Axis] Payment to former chief financial officer Severance and benefits costs Severance Costs Rentable space terminated from lease agreement (in square feet) Rentable Square Feet Terminated From Lease Agreement The amount of leased space terminated from the lease agreement. Leases Lease Disclosure [Text Block] The entire disclosure of information about leases. Restructuring and Related Costs [Table Text Block] Schedule of accrued liabilities activity allocated to Cyclerion in connection with the reductions in workforce 401 (k) Savings Plan Defined Contribution Plan, Type [Extensible Enumeration] Total cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Shares Issued, Price Per Share Common stock share purchase price Wework. WeWork [Member] WeWork License and Service [Member] License and Service Stock Options Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Option additional fee Option additional fee. Option Additional Fee Disposal group including discontinued operation, share-based compensation expense. Disposal Group Including Discontinued Operation Share-Based Compensation Expense Share-based compensation expense Additional Paid in Capital, Common Stock Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Paid-in capital Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Property and Equipment Property, Plant and Equipment [Line Items] Investment Holdings, Other than Securities [Line Items] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Medsteer Collaboration Agreement [Member] Medsteer Collaboration Agreement [Member] Medsteer Collaboration Agreement. Schedule of basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Issuance of preferred shares Proceeds from Issuance of Preferred Stock and Preference Stock Investment, Name [Axis] Net loss per share - basic Earnings Per Share, Basic Total (gain) loss per share Basic net loss per share Defined Contribution Plan Retirement Benefits [Text Block] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation adjustment loss Outstanding at beginning of the year (in shares) Outstanding at end of the year (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Outstanding stock options Total current liabilities Liabilities, Current Increase (Decrease) in Accounts Receivable Accounts receivable Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Patent License Agreement [Member] Patent license agreement. Patent License Agreement [Member] Sales Agreement [Member] Sales agreement. Sales Agreement [Member] Stockholders' equity Equity, Attributable to Parent [Abstract] Entity Small Business Entity Small Business Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Accumulated deficit Retained Earnings (Accumulated Deficit) Preferred Stock [Member] Preferred Stock Cancelled or forfeited (in shares) Stock options forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Total intrinsic value Share-based Compensation Plans Share-Based Payment Arrangement [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Defined Contribution Plan [Table] Defined Contribution Plan [Table] Issuance of common stock upon exercise of stock options, RSUs and employee stock purchase plan (in shares) Stock Issued During Period Shares Exercise Of Stock Options Restricted Stock Units And Employee Stock Purchase Plans Number of shares issued during the period as a result of an employee stock purchase plan and exercise of stock options and Restricted Stock Units. Leases [Abstract] Leases Lessee, Lease, Description [Line Items] Amendment Flag Amendment Flag Product and Service [Domain] LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash used in operating activities Denominator: Earnings Per Share Basic and Diluted1 [Abstract] Earnings per share basic and diluted1. Common Stock [Member] Common Stock Akebia Supply Agreement [Member] Akebia Supply Agreement. Akebia Supply Agreement [Member] Exercise price Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Less: accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Entity Address, Address Line One Entity Address, Address Line One Remaining Additional Up Front Payment Remaining additional up front payment. 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Revenues Disposal Group, Including Discontinued Operation, Revenue Document Type Document Type Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Entity Central Index Key Entity Central Index Key End of period Beginning of period Beggining Beginning of period End of period Restructuring Reserve, Current Option fee Option Fee Option fee Valuation Approach and Technique [Axis] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net increase (decrease) in cash and cash equivalents Subsequent Event Type [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive securities excluded from the calculation of diluted loss per share Disposal Group Classification [Domain] Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units Dilutive securities, effect on basic earnings per share, options and restrictive stock units Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Weighted Average Remaining Contractual Term (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Defined Contribution Plan Defined Contribution Plan Disclosure [Line Items] Gain (Loss) on Termination of Lease Gain (Loss) on Termination of Lease Termination agreement. Termination Agreement [Member] Termination Agreement PTC Grant Award PTC Grant Award PTC Grant Award Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Investment [Text Block] Other Investment Impairment loss on other investments Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount Workforce reductions plan. Workforce Reductions Plan [Member] Current Fiscal Year End Date Current Fiscal Year End Date Document Quarterly Report Document Quarterly Report Amendment Akebia Research License Agreement [Member] Amendment Akebia Research License Agreement. Amendment Akebia Research License Agreement [Member] Entity Address, State or Province Entity Address, State or Province Unvested the end of the period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unvested as of December 31, 2021 Unvested at the beginning of the period (in shares) Cyclerion Therapeutics Inc [Member] Cyclerion Therapeutics Inc. Cyclerion Investment, Name [Domain] Number of employees impacted Share-Based Payment Arrangement, Plan Modification, Number of Grantees Affected Preferred Stock, Shares Outstanding, Beginning Balance Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Comprehensive Income (Loss), Net of Tax, Attributable to Parent Net loss and other comprehensive loss Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Discontinued Operations Cash commission percentage of gross proceeds of sales of common stock. Cash Commission Percentage Of Gross Proceeds Of Sales Of Common Stock Cash commission of gross proceeds of sales of common stock, percentage Prepaid rooms balance related to other assets. Prepaid Rooms Balance Related To Other Assets Prepaid rooms balance reclassified from other assets Current Workforce Reductions [Member] Current workforce reductions Represents information pertaining to current workforce reductions of the Company. Schedule of share-based compensation expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Accrued Expenses and Other Current Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Performance stock options Performance Shares [Member] Income (Loss) from Continuing Operations, Per Basic Share Net loss per share from continuing operations Net loss per share from continuing operations - basic Subsequent Event [Member] Subsequent Event [Member] Property, Plant and Equipment [Abstract] Disposal group including discontinue operation operating expenses. Disposal Group, Including Discontinue Operation, Operating Expenses Total cost and expenses Total cost and expenses Antidilutive Securities Antidilutive Securities [Axis] Related Party Transaction [Axis] Cash and Cash Equivalents Cash and Cash Equivalents [Domain] Tisento therapeutics holdings inc. Tisento Therapeutics Holdings Inc [Member] Tisento Therapeutics Holdings Inc Lessor Lease Description [Table] Lessor, Lease, Description [Table] Preferred Stock, Value, Issued Preferred stock, no par value, 100,000,000 shares authorized and 351,037 shares of Series A convertible preferred stock issued and outstanding at March 31, 2026 and December 31, 2025 Revenue Recognition, Milestone Method, Revenue Recognized Recognized revenue related to the option fee payment and expense reimbursement Threshold consecutive trading days, used as a base for measurement of vesting of stock awards Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Measurement Threshold Number Of Consecutive Trading Days Considered Threshold period of consecutive trading days over which the average closing price of the Company's share price is considered for measurement of vesting of stock awards. Disposal Groups, Including Discontinued Operations [Table Text Block] Schedule of discontinued operations Minimum Minimum [Member] Minimum [Member] Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Lease Amendment Amended Headquarters Lease [Member] Represents information pertaining to an amended direct operating lease effective February 28, 2020 for premises located at 301 Binney Street, Cambridge, MA. Current assets: Assets, Current [Abstract] Other Long-Term Investments Other investment Level 3 Fair Value, Inputs, Level 3 [Member] Development agreement Development Agreement [Member] Represents the information pertaining to the agreement under which Company provides services to Ironwood and the amounts earned are recorded as revenue. Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of financial assets measured at fair value on a recurring basis and indicating the level of the fair value hierarchy Current liabilities: Liabilities, Current [Abstract] Subsequent Fees subsequent fees Subsequent fees All Award Types Restructuring and Related Activities Disclosure [Text Block] Workforce Reductions Schedule of accrued expenses and other current liabilities Other Current Liabilities [Table Text Block] Related Party Transactions [Abstract] Accounts Receivable, after Allowance for Credit Loss, Current, Total Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable Renewal term Lessee, Operating Lease, Renewal Term Commercialization milestone payments Commercialization Milestone Payments Commercialization milestone payments. Commitments and Contingencies Commitments and contingencies (Note 6) Unvested restricted common stock at the end of the period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Unvested as of December 31, 2021 Unvested at the beginning of the period (in dollars per share) General and administrative General and Administrative Expense [Member] Akebia Akebia License Agreement [Member] Akebia license agreement. Lessee Lease Description [Table] Lessee, Lease, Description [Table] Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Geographic Distribution Geographic Distribution [Axis] Weighted average shares used in calculating net loss per share - basic Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic, Total Basic shares Two Thousand Twenty Five Equity Private Placement [Member] Two thousand twenty five equity private placement member. 2025 Equity Private Placement Issuance of common stock - private placement, net of issuance cost (in share) Stock Issued During Period Issuance of Common Stock Net of Issuance Cost, Share Stock issued during period issuance of common stock net of nssuance cost, share. Aggregate Intrinsic Value, Exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Incremental compensation expense due to modification Share-Based Payment Arrangement, Plan Modification, Incremental Cost Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Long-Lived Tangible Asset Long-Lived Tangible Asset [Domain] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures, Total Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Number of share options granted Subsequent Events Subsequent Events [Text Block] Related Party Transactions Related Party Transactions Disclosure [Text Block] APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Share-based compensation expense related to issuance of stock options and restricted stock awards Debt Instrument, Convertible, Threshold Percentage of Outstanding Shares Debt instrument, convertible, threshold percentage of outstanding shares. Percentage of outstanding shares Total stockholders' equity Beginning balance Ending balance Equity, Attributable to Parent Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Statement of Stockholders' Equity [Abstract] SeriesA convertible preferred stock. SeriesA Convertible Preferred Stock [Member] Series A Convertible Preferred Stock [Member] Type of Restructuring Type of Restructuring [Domain] Valuation Approach and Technique [Domain] Series A Preferred Stock [Member] Series A Convertible Preferred Stock Series A Preferred Stock Use of Estimates Use of Estimates, Policy [Policy Text Block] Equity Method Investment [Table] Leasehold improvements Leasehold Improvements [Member] Entity Address, Address Line Two Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Sublease termination agreement estimated fair value of rooms Sublease Termination Agreement Estimated Fair Value Of Rooms Sublease termination agreement estimated fair value of rooms. Number of Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Other current assets Other Assets, Current Ironwood Ironwood Pharmaceuticals Inc [Member] Ironwood Pharmaceuticals, Inc., the parent of the reporting entity. The reporting entity was spun off from Ironwood. Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share, Total Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Net (gain) loss per share from discontinued operations Net gain (loss) per share from discontinued operations - basic Software Software and Software Development Costs [Member] 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] Outstanding equity securities Equity Method Investment, Ownership Percentage Equity securities, percentage Business Description and Basis of Presentation [Text Block] Nature of Business Restructuring Plan [Axis] Restructuring Plan Related Party Related and Nonrelated Parties [Axis] Preferred Stock, Convertible, Conversion Ratio Number of common shares Entity Address, City or Town Entity Address, City or Town Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block] Schedule of earnings per share diluted by common class Security Exchange Name Security Exchange Name Property, Plant and Equipment, Gross, Ending Balance Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Total Property and equipment. gross Property, Plant and Equipment, Gross Investments, All Other Investments [Abstract] Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share, Total Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Net (gain) loss per share from discontinued operations Net gain per share from discontinued operations - diluted Total cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Statistical Measurement Statistical Measurement [Domain] Total current assets Assets, Current Share-based compensation Share-Based Payment Arrangement, Expense Document Period End Date Document Period End Date Title and Position [Axis] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Compensation expense related to the defined contribution 401(k) Savings Plan Defined Contribution Plan, Cost Exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Accrued research and development costs Accrued Research And Development Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for research and development. Used to reflect the current portion of liabilities. Gain (Loss) on Disposition of Property Plant Equipment, Total Net loss on disposal of property and equipment Gain (Loss) on Disposition of Property Plant Equipment Net loss on disposal of property and equipment Statement of Financial Position [Abstract] Restricted Stock Units Restricted Stock Units (RSUs) [Member] Licensed Room Licensed Room [Member] Licensed room. Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Class of Stock [Axis] Issuance of common stock upon exercise of stock options, RSUs and employee stock purchase plan Stock Issued During Period Value Exercise Of Stock Options Restricted Stock Units And Employee Stock Purchase Plans Value of shares issued during the period as a result of an employee stock purchase plan and exercise of stock options and Restricted Stock Units. Expected option term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period Adjustments Restructuring Reserve, Accrual Adjustment Disposal group including discontinued operation research and development expense. Disposal Group, Including Discontinued Operation, Research and Development Expense Research and development Disposal Groups, Including Discontinued Operations [Table] Restricted Stock [Member] Restricted Stock Awards Weighted average shares used in calculating net loss per share - diluted Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Diluted shares Entity File Number Entity File Number Disposal Group, Including Discontinued Operation, Classified Balance Sheet Disclosures [Abstract] Cover [Abstract] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited (in shares) Stock Issued During Period Issuance of Common Stock Net of Issuance Cost, Value Stock issued during period issuance of common stock net of issuance cost, value Issuance of common stock - private placement, net of issuance cost Sale of Stock Sale of Stock [Domain] General and Administrative Expense, Total General and administrative General and Administrative Expense Nonvested Restricted Stock Shares Activity [Table Text Block] Summary of RSA activity Number of shares vested Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Operating Lease, Expense lease expense Restructuring Charges, Total Charges Restructuring Charges Weighted Average Remaining Contractual Term (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Treasury rate. Treasury Rate [Member] Treasury rate unrecognized share-based compensation expense | $ Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Term of lease Lessee, Operating Lease, Term of Contract Term of lease Cyclerion License Agreement [Member] Cyclerion license agreement. Cyclerion Common stock, shares outstanding Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Current portion of operating lease liabilities Operating Lease, Liability, Current Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Document Transition Report Document Transition Report Total cost and expenses Operating Expenses Operating expenses Research and Development Expense, Total Research and development Research and Development Expense Research and development expense Revenue Recognition and Deferred Revenue [Abstract] Statement of Cash Flows [Abstract] Weighted-Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Akebia Research License Agreement [Member] Akebia Research License Agreement [Member] Akebia Research License Agreement Member. Stock Issued During Period, Value, New Issues Issuance of common stock equity private placement and ATM Issuance of common stock - ATM Schedule of stock option activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Loss per share Earnings Per Share [Text Block] Shares, Issued Common stock shares issued Discontinued Operations and Disposal Groups [Abstract] Net loss and other comprehensive loss Net loss Aggregate Intrinsic Value, Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Interest income Other Nonoperating Income Additional milestone cash payment Payment Of Cash Milestone Payment of cash milestone. ASSETS Assets [Abstract] License Agreement [Abstract] License agreement abstract. Maximum amount of Aggregate initial offering price. Maximum Amount Of Aggregate Initial Offering Price Maximum amount of aggregate initial offering price Restructuring and Related Activities [Abstract] Document Fiscal Year Focus Document Fiscal Year Focus CASH FLOWS FROM INVESTING ACTIVITIES: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Retirement Benefits [Abstract] Accounts Payable, Current, Total Accounts payable Accounts Payable, Current Research and development Research and Development Expense [Member] Geographic Distribution Geographic Distribution [Domain] Matching contribution (as a percent of employee's contributions) Defined Contribution Plan, Employer Matching Contribution, Percent of Match Deferred Revenue Deferred Revenue Deferred Revenue, Total Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Terminal decline rate. Terminal Decline Rate [Member] Terminal decline rate Market-based Stock Options Market-based Stock Options [Member] Market-based stock options. Fair Value Disclosures [Abstract] Commitments and Contingencies Disclosure [Abstract] Investment Owned, Net Assets, Percentage Net assets percentage Share-Based Payment Arrangement [Abstract] Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total Unrecognized share-based compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Sale of Stock Sale of Stock [Axis] License Agreements [Text Block] The entire disclosure for license agreements. Option/License Agreement Summary of RSU activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Total revenues Revenues Total revenues Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash used in investing activities Private Placement Private Placement [Member] Title of 12(b) Security Title of 12(b) Security Cancelled or forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Money market funds Money Market Funds [Member] Related Party Related and Nonrelated Parties [Domain] Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Consolidated Entities Consolidated Entities [Axis] Restructuring Plan Restructuring Plan [Domain] Weighted average investment. Weighted Average Investment [Member] Weighted average investment 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] Schedule of property and equipment, net Property, Plant and Equipment [Table Text Block] Outstanding at beginning of the year (in dollars per share) Outstanding at end of the year (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted average exercise price Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Accrued Liabilities and Other Liabilities [Abstract] Paid-in capital Additional Paid-in Capital [Member] Measurement Frequency Measurement Frequency [Domain] Income Statement Location Statement of Income Location, Balance [Axis] Trading Symbol Trading Symbol Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Schedule Of Related Party Transactions By Related Party [Table] Related Party Transaction [Table] October 2022 Current Workforce Reductions [Member] October 2022 current workforce reductions. October 2022 Current Workforce Reduction Director [Member] Director Subsequent Event Type [Axis] Employee compensation Employee-related Liabilities, Current Employee-related Liabilities, Current, Total CASH FLOWS FROM FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Recurring Fair Value, Recurring [Member] Entity Ex Transition Period Entity Ex Transition Period Net Cash on Capitalization Net cash on capitalization. Net cash on capitalization Equity Components Equity Components [Axis] Nonoperating Income (Expense) Interest income Total other income, net Equity Component Equity Component [Domain] Asset Class [Axis] Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants Aggregate purchase price Leasehold Improvements Gross Leasehold Improvements, Gross Sublease as lessor Lessor, Lease, Description [Line Items] Other current assets Increase (Decrease) in Other Current Assets Other current assets Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Vesting of restricted stock awards (in shares) Issuance of common stock upon vesting of RSUs (in shares) IPO IPO [Member] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Depreciation, Depletion and Amortization, Nonproduction, Total Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Gain (loss) on disposal of discontinued operations. Gain (Loss) On Disposal Of Discontinued Operations Gain on disposal of discontinued operations Maximum Maximum [Member] Statistical Measurement Statistical Measurement [Axis] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Prepaid Expense, Current, Total Prepaid expenses Prepaid Expense, Current Accrued expenses and other current liabilities Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common Stock, Value, Issued Common stock, no par value, 400,000,000 shares authorized at March 31, 2026 and December 31, 2025 ; 2025; 4,330,314 and 3,925,314 shares issued at March 31, 2026 and December 31, 2025, respectively; 4,241,260 and 3,821,236 shares outstanding at March 31, 2026 and December 31, 2025, respectively Property and Equipment Property, Plant and Equipment [Member] Transaction Costs Sale of Transferred Assets Transaction costs sale of transferred assets. Transaction costs associated with sale of transferred assets Allowable Expenses on Grant Revenue Allowable Expenses on Grant Revenue Allowable Expenses on Grant Revenue Cash equivalents: Cash and Cash Equivalents [Abstract] Equity, Including Portion Attributable to Noncontrolling Interest Equity, Including Portion Attributable to Noncontrolling Interest, Total Ending balance Beginning balance Option Agreement [Member] Option Agreement [Member] Option Agreement. Revenue from option agreement Income (Loss) from Continuing Operations, Per Diluted Share Net loss per share from continuing operations Net loss per share from continuing operations - diluted Available-for-sale securities, continuous unrealized loss position, fair value 1. Available-for-Sale Securities, Continuous Unrealized Loss Position, Fair Value 1 Fair value of outstanding equity securities Preferred Stock, Shares Authorized Preferred stock, shares authorized Costs and Expenses Costs and Expenses, Total Expenses Related Party Transaction [Line Items] Related Party Transaction [Line Items] Grant Revenue Revenue from Contract with Customer [Text Block] Entity Registrant Name Entity Registrant Name Payments to Acquire in Process Research and Development Payment of additional development materials Subsequent Events [Abstract] Consolidated Entities Consolidated Entities [Domain] Measurement Frequency Measurement Frequency [Axis] Proceeds from Issuance of Common Stock Proceeds from stock purchase agreement Proceeds from private placement Share-based Compensation Plans Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Disposal Group Classification [Axis] Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accrued research and development costs Increase Decrease In Accrued Research And Development The increase (decrease) during the reporting period in accrued research and development expense. Amount paid Payments for Restructuring Payments to Acquire Property, Plant, and Equipment Payments to Acquire Property, Plant, and Equipment, Total Purchases of property and equipment Purchases of property and equipment Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Granted (in shares) Total assets Assets Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment [Table] 2023 Further Workforce Deductions [Member] 2023 Further workforce deductions member 2023 Further Workforce Deductions Weighted Average Remaining Contractual Term (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Income Statement [Abstract] Schedule Of Restructuring And Related Costs [Table] Restructuring Cost [Table] Korsana Biosciences Inc [Member] Korsana Biosciences Inc. Korsana Stock Issued During Period, Shares, New Issues Issuance of common stock - ATM (In Shares) Sale of shares Series Seed Preferred Stock [Member] Series seed preferred stock. Series Seed Preferred Stock Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Vested (in shares) Earnings Per Share, Diluted [Abstract] Net gain (loss) per share - diluted Earnings Per Share, Diluted Total gain (loss) per share Diluted net loss per share Net loss per share - diluted Accounts payable Increase (Decrease) in Accounts Payable, Trade Title and Position [Domain] City Area Code City Area Code Sublease Termination Agreement Sublease Termination Agreement [Member] Sublease termination agreement. Second Lease Amendment Second Amended Headquarters Lease [Member] Second amended headquarters lease. Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net gain (loss) from discontinued operations Gain from discontinued operations Up Front Payment Received Up Front Payment Received. Up front payment received Lease, Cost, Total Lease, Cost Lease Expense Total lease costs Akebia Material Purchase Agreement [Member] Akebia Material Purchase Agreement. Akebia Material Purchase Agreement [Member] Grant revenue. Grant Revenue [Table] Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Loss from operations Operating Income (Loss) Accumulated deficit Retained Earnings [Member] Cash and Cash Equivalents Cash and Cash Equivalents [Axis] Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Net gain from discontinued operations Share-based Payment Arrangement, Noncash Expense, Total Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense Cash consideration transferrred Asset Acquisition, Consideration Transferred Asset Acquisition, Consideration Transferred, Total Consideration on acquisition transferred Commissions paid Payments of Stock Issuance Costs Restructuring and Related Cost, Number of Positions Eliminated Reduction in workforce, number of employees Noncurrent lease liability Operating lease liabilities, net of current portion Operating Lease, Liability, Noncurrent Level 1 Fair Value, Inputs, Level 1 [Member] Nature of Business Class of Stock [Line Items] Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Issuance of preferred shares ( in shares) Issuance of Preferred Stock Issuance of preferred stock. Other income, net Nonoperating Income (Expense) [Abstract] Maximum amount of employer matching contribution Defined Contribution Plan Employer Matching Contribution Maximum The maximum amount per employee of the employer's matching contributions. Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Grant [Member] Grant [Member] Schedule of supplemental cash flow information related to leases Lessee Operating Lease Supplemental Cash Flow Information Table [Text Block] The tabular disclosure of supplemental cash flow information related to leases. Fractional shares issuance Fractional shares issuance Fractional Shares Issuance Fractional shares issuance. Entity Interactive Data Current Entity Interactive Data Current Income Statement Location Statement of Income Location, Balance [Domain] CASH FLOWS FROM OPERATING ACTIVITIES: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Disposal Group, Including Discontinued Operation, General and Administrative Expense General and administrative Entity Tax Identification Number Entity Tax Identification Number Revenues [Abstract] Revenues: ATM Offering At The Market Offering [Member] At The Market Offering. Local Phone Number Local Phone Number Related Party Transaction [Domain] Unrecognized share-based compensation expense | $ Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Restructuring costs Restructuring Costs Restructuring Costs, Total Accounting Policies [Abstract] Disaggregation of Revenue [Line Items] Other Other Sundry Liabilities, Current Revenue from Contract with Customer, Excluding Assessed Tax, Total Revenue from related party Revenue from Contract with Customer, Excluding Assessed Tax Insurance Recoveries Insurance Recoveries Class of Stock [Domain] Expected period to recognize the expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Office Equipment [Member] Computer equipment Professional fees Accrued Professional Fees, Current Percent of compensation eligible employees may elect to contribute Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Head Lease Headquarters Lease [Member] Represents information pertaining to a direct operating lease for existing premises located at 301 Binney Street, Cambridge, MA. Stock, Class of Stock [Table] Schedule Of Stock By Class [Table] Entity Emerging Growth Company Entity Emerging Growth Company Disposal Group, Including Discontinued Operation, Operating Income (Loss) Loss from operations Loss from operations