Document and Entity Information [Abstract] Document Type Document Quarterly Report Document Period End Date Document Transition Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, Adress Line Two Entity Address, City or Town Entity Address State Or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Ex Transition Period Entity Shell Company Title of 12(b) Security Trading Symbol Security Exchange Name Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Condensed Consolidated Balance Sheets Statement [Table] Class of Stock [Axis] Class of Stock [Domain] Represents the information pertaining to Series seed convertible preferred stock. Series Seed Convertible Preferred Stock [Member] Series Seed convertible preferred stock Series A Preferred Stock [Member] Series A convertible preferred stock Series B Preferred Stock [Member] Series B convertible preferred stock Statement [Line Items] Statement Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Short-Term Investments Short-term investments Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property and equipment, net Operating Lease, Right-of-Use Asset Operating lease right-of-use assets, net Restricted Cash, Noncurrent Restricted cash Other Assets, Noncurrent Other assets Total other assets Assets Total assets Liabilities and Equity [Abstract] Liabilities, Convertible Preferred Stock and Stockholders' Equity (Deficit) Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable (includes $594 and $21 owed to related parties, respectively) Accounts payable Accrued Liabilities, Current Accrued expenses (includes $1,873 and $404 owed to related parties, respectively) Total accrued expenses Accrued expenses Operating Lease, Liability, Current Operating lease liabilities, current Liabilities, Current Total current liabilities Operating Lease, Liability, Noncurrent Operating lease liabilities, non-current Convertible Notes Payable, Noncurrent Convertible notes, at fair value Liabilities Total liabilities Commitments and Contingencies. Commitments and contingencies (Note 14) Temporary Equity, Carrying Amount, Attributable to Parent Balance at the end Balance at the beginning Convertible preferred stock Carrying Value Equity, Attributable to Parent [Abstract] Stockholders' equity (deficit): Preferred Stock, Value, Issued Preferred stock, par value $0.0001 per share; 25,000,000 and no shares authorized as of September 30, 2024 and December 31, 2023, respectively; no shares issued and outstanding as of September 30, 2024 and December 31, 2023 Common Stock, Value, Issued Common stock, par value $0.0001 per share; 175,000,000 shares authorized as of September 30, 2024 and December 31, 2023; 41,780,938 and 1,576,854 shares issued and outstanding as of September 30, 2024 and December 31, 2023, respectively Additional Paid in Capital Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Retained Earnings (Accumulated Deficit) Accumulated deficit Equity, Attributable to Parent Balance at the end Balance at the beginning Total stockholders' equity (deficit) Liabilities and Equity Total liabilities, convertible preferred stock and stockholders' equity (deficit) Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Domain] Related Party [Member] Related party Temporary Equity, Par or Stated Value Per Share Convertible preferred stock, par value (in dollars per share) Temporary Equity, Shares Authorized Convertible preferred stock, shares authorized Preferred Stock Authorized Temporary Equity, Shares Issued Convertible preferred stock, shares issued Preferred Stock Issued Temporary Equity, Shares Outstanding Balance at the end (in shares) Balance at the beginning (in shares) Convertible preferred stock, shares outstanding Preferred Stock Outstanding Temporary Equity, Liquidation Preference Convertible preferred stock, liquidation preference Liquidation Value Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollar per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Common Stock, Par or Stated Value Per Share Common stock, par value (in dollar per share) Common Stock, Shares Authorized Common stock, shares authorized Common stock, shares authorized (in shares) Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income Revenues [Abstract] Revenue: Revenue from Contract with Customer, Excluding Assessed Tax Collaboration revenue Revenue Revenues Total revenue Operating Expenses [Abstract] Operating expenses: Research and Development Expense Research and development (includes $1,375, $612, $3,247 and $2,117 from related parties, respectively) Research and development General and Administrative Expense General and administrative (includes $0, $3, $0 and $71 from related parties, respectively) General and administrative Research and Development Asset Acquired in Transaction Other than Business Combination or Joint Venture Formation, Capitalized Cost Acquired in-process research and development Operating Expenses Total operating expenses Operating Income (Loss) (Loss) income from operations Nonoperating Income (Expense) [Abstract] Other income (expense), net: Amount of expense (income) related to adjustment to fair value of convertible notes. Fair Value Adjustment of Convertible Notes Fair value adjustments to convertible notes Change in fair value of BMS Note Change in fair value of convertible notes Other Nonoperating Income (Expense) Other income (expense), net Nonoperating Income (Expense) Total other income (expense), net Net (loss) income Net (loss) income Earnings Per Share, Basic Net (loss) income per share attributable to common stockholders - basic (in dollars per share) Earnings Per Share, Diluted Net (loss) income per share attributable to common stockholders - diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Basic Weighted-average common stock outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted-average common stock outstanding - diluted (in shares) Weighted-average common stock outstanding - diluted (in shares) Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive loss: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustment Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive (loss) income Condensed Consolidated Statements of Changes in Convertible Preferred Stock and Stockholders' Equity (Deficit) Equity Components [Axis] Equity Component [Domain] Preferred Stock [Member] Convertible Preferred Stock Common Stock [Member] Common Stock Additional Paid-in Capital [Member] Additional Paid-in Capital AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) Retained Earnings [Member] Accumulated Deficit Series C Preferred Stock [Member] Series C convertible preferred stock Series C Preferred Stock Increase (Decrease) in Temporary Equity [Roll Forward] Changes in Convertible Preferred Stock Temporary Equity, Stock Issued During Period, Value, New Issues Issuance of convertible preferred stock Number of new stock classified as temporary equity issued during the period. Temporary Equity, Stock Issued During Period, Shares, New Issues Issuance of convertible preferred stock (in shares) Number of preferred stock issued Value of conversion of securities from temporary equity to permanent equity. Temporary Equity, Stock Issued During Period, Value, Conversion Conversion of convertible preferred stock to common stock upon closing of initial public offering Number of shares converted from temporary equity to permanent equity. Temporary Equity, Stock Issued During Period, Shares, Conversion Conversion of convertible preferred stock to common stock upon closing of initial public offering (in shares) Increase (Decrease) in Stockholders' Equity [Roll Forward] Changes in Stockholders' Equity (Deficit) Shares, Issued Balance at the end (in shares) Balance at the beginning (in shares) Stock Repurchased During Period, Shares Repurchase of unvested restricted stock awards (in shares) Stock Issued During Period, Value, Stock Options Exercised Exercises of common stock options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Exercised (in shares) Exercises of common stock options (in shares) APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Stock-based compensation expense Stock Issued During Period, Value, Conversion of Convertible Securities Conversion of convertible preferred stock to common stock upon closing of initial public offering Stock Issued During Period, Shares, Conversion of Convertible Securities Conversion of convertible preferred stock to common stock upon closing of initial public offering (in shares) Stock Issued During Period, Value, New Issues Issuance of common stock Stock Issued During Period, Shares, New Issues Issuance of common stock (in shares) Number of common stock issued Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Stock issuance costs Condensed Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Depreciation Depreciation expense Share-Based Payment Arrangement, Noncash Expense Stock-based compensation expense Amount of non-cash lease expense. Non-cash lease expense Non-cash lease expense Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other assets Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities Accrued expenses Increase (Decrease) in Operating Lease Liability Operating lease liabilities Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payments to Acquire Investments Purchases of investments Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Proceeds from Issuance of Redeemable Convertible Preferred Stock Proceeds from issuance of Series C convertible preferred stock, net of issuance costs Payments of Stock Issuance Costs Payment of initial public offering costs Proceeds from Convertible Debt Proceeds from sale of convertible notes Proceeds from Stock Options Exercised Proceeds from exercise of stock options Proceeds from Issuance Initial Public Offering Proceeds from initial public offering, net of underwriting discount Aggregate gross proceeds Net Cash Provided by (Used in) Financing Activities Net cash provided by 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 changes on cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at end of period Cash, cash equivalents and restricted cash at beginning of period Total cash and restricted cash Supplemental Cash Flow Information [Abstract] Supplemental disclosure of non-cash investing and financing activities: Notes Assumed Fair value of BMS Note recognized as Series C convertible preferred stock upon conversion The amount of deferred offering costs included in accounts payable and accrued expenses. Deferred Offering Costs Included In Accounts Payable and Accrued Expenses Deferred offering costs in accounts payable and accrued expenses The amount of deferred offering costs included in accrued expenses. Deferred Offering Costs Included In Accrued Expenses Deferred offering costs in accrued expenses Conversion of Stock, Amount Converted Conversion of convertible preferred stock to common stock upon closing of initial public offering No definition available. Reconciliation Of Cash Cash Equivalents And Restricted Cash And Cash Equivalents [Abstract] Reconciliation of cash, cash equivalents and restricted cash: Nature of Business Nature of Operations [Text Block] Nature of Business Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments Fair Value Measurement Fair Value Disclosures [Text Block] Fair Value Measurement Other Assets Other Assets Disclosure [Text Block] Other Assets Accrued Expenses Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Accrued Expenses Leases Lessee, Operating Leases [Text Block] Leases N/a. Collaboration Revenue Collaborative Arrangement Disclosure [Text Block] Collaboration Revenue No definition available. License and Option Agreements The entire disclosure for license and option agreements. License and Option Agreements, Disclosure [Text Block] License and Option Agreements Convertible Preferred Stock The entire disclosure of terms, amounts, nature of changes, rights and privileges, conversions and other matters related to temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. Temporary Equity Disclosure [Text Block] Convertible Preferred Stock Common Stock Equity [Text Block] Common Stock Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Stock-Based Compensation Net (Loss) Income Per Share Earnings Per Share [Text Block] Net (Loss) Income Per Share Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Employee Benefit Plans Retirement Benefits [Text Block] Employee Benefit Plans Related Party Transactions Related Party Transactions Disclosure [Text Block] Related Party Transactions Subsequent Events Subsequent Events [Text Block] Subsequent Events Disclosure of accounting policy for unaudited interim financial information. Unaudited Interim Financial Information, Policy [Policy Text Block] Unaudited Interim Financial Information Deferred Charges, Policy [Policy Text Block] Deferred Offering Costs Investment, Policy [Policy Text Block] Investments New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Standards Not Yet Adopted Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Schedule of available-for-sale securities reconciliation Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of financial assets and liabilities measured at fair value on a recurring basis Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of changes in the company's liabilities with significant unobservable inputs Schedule of Other Assets, Noncurrent [Table Text Block] Summary of other assets Schedule of Accrued Liabilities [Table Text Block] Summary of accrued expenses Tabular disclosure of undiscounted cash flows of lessee's operating lease liability, Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position and quantitative information pursuant to operating lease. Lessee, Operating Lease, Liability, to be Paid, Maturity And Quantitative Disclosure [Table Text Block] Schedule of maturities of the operating lease liabilities and quantitative disclosure Temporary Equity [Table Text Block] Schedule of convertible preferred stock Tabular disclosure of common stock reserved for potential conversion of securities and shares reserved for future issuance. Schedule Of Common Stock Reserved For Potential Conversion Of Securities And Future Issuance [Tables Text Block] Schedule of common stock reserved for potential conversion and future issuance Nonvested Restricted Stock Shares Activity [Table Text Block] Schedule of RSA activity and related information Share-Based Payment Arrangement, Option, Activity [Table Text Block] Schedule of stock option activity and related information Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Schedule of stock-based compensation expense as reflected in condensed consolidated statements of operations and comprehensive loss Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of basic and diluted net (loss) income per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of anti-dilutive securities excluded from the computation of diluted net (loss) income per share Collaborative Arrangement and Arrangement Other than Collaborative [Table] Sale of Stock [Axis] Sale of Stock [Domain] IPO [Member] IPO Over-Allotment Option [Member] Underwriter's option Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Nature of Business Number of Operating Segments Number of operating segments Shares Issued, Price Per Share Public offering price Sale of Stock, Consideration Received on Transaction Net proceeds Convertible Preferred Stock, Shares Issued upon Conversion Convertible preferred stock into common stock Stockholders' Equity Note, Stock Split, Conversion Ratio Reverse stock split Cash, Cash Equivalents, and Short-Term Investments Cash, cash equivalents and investments Deferred Costs, Noncurrent Deferred offering costs Debt Securities, Available-for-Sale [Table] Financial Instrument [Axis] Financial Instruments [Domain] Commercial Paper [Member] Commercial paper Corporate Debt Securities [Member] Corporate debt securities US Government Corporations and Agencies Securities [Member] Government securities Debt Securities, Available-for-Sale [Line Items] Investments Debt Securities, Available-for-Sale, Amortized Cost Amortized Cost Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Gains Debt Securities, Available-for-Sale, Current Fair Value Investments: Statistical Measurement [Axis] Statistical Measurement [Domain] Maximum [Member] Maximum Period between issuance and maturity of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Debt Securities, Available-for-Sale, Current, Term Short-term investments, contractual maturity (in years) Long-Term Investments Long-term investments Debt Securities, Available-for-Sale, Excluding Accrued Interest Amount of investments held Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Unrealized loss position Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Amount of allowances for credit losses Debt Securities, Available-for-Sale, Unrealized Loss Position Aggregate fair value of available-for-sale securities in an unrealized loss position Fair Value, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Domain] Fair Value, Recurring [Member] Recurring Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Level 1 Fair Value, Inputs, Level 2 [Member] Level 2 Fair Value, Inputs, Level 3 [Member] Level 3 Money Market Funds [Member] Money market funds Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurement Assets, Fair Value Disclosure [Abstract] Assets: Assets, Fair Value Disclosure Total assets at fair value Cash Equivalents, at Carrying Value Cash equivalents Liabilities, Fair Value Disclosure [Abstract] Liabilities: Convertible Debt, Fair Value Disclosures BMS Note Liabilities, Fair Value Disclosure Total liabilities at fair value Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. Fair Value, Assets, Level 1 to Level 2 Transfer, Amount Assets - Transfer from level 1 to 2 Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1. Fair Value, Assets, Level 2 to Level 1 Transfer, Amount Assets - Transfer from level 2 to 1 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Assets - Transfer into level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Assets - Transfer out of level 3 Amount of transfers of liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. Fair Value, Liabilities, Level 1 to Level 2 Transfer, Amount Liabilities - Transfer from level 1 to 2 Amount of transfers of liabilities measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1. Fair Value, Liabilities, Level 2 to Level 1 Transfer, Amount Liabilities - Transfer from level 2 to 1 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 Liabilities - Transfer into level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Liabilities - Transfer out of level 3 Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument, Name [Domain] Represents information relating to the BMS convertible promissory notes payable. BMS Convertible Promissory Notes [Member] BMS Notes BMS Notes Debt Instrument [Line Items] Fair Value Measurement Debt Instrument, Face Amount Face value of notes The minimum cash inflow required from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock for automatic conversion of the convertible promissory notes. Minimum Proceeds from Issuance of Convertible Preferred Stock For Automatic Conversion Of Convertible Promissory Notes Minimum Proceeds from Issuance of Convertible Preferred Stock For Automatic Conversion Of Convertible Promissory Notes Number of convertible preferred stock classified as temporary equity issued upon conversion of convertible notes during the period. Temporary Equity, Stock Issued During Period, Shares, Conversion of Convertible Securities Number of shares issued upon conversion of convertible notes Number of shares issued on conversion Gain (Loss) on Extinguishment of Debt Gain (Loss) on extinguishment Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Ending Balance Beginning Balance Liabilities with significant unobservable inputs outstanding Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Changes in company's liabilities with significant unobservable inputs (Level 3 liabilities) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Change in fair value of BMS Note Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Issuance of Series C Preferred Stock in exchange for BMS Note Prepaid Expense, Noncurrent Prepaid clinical expenses Other Assets, Miscellaneous, Noncurrent Other Employee-related Liabilities, Current Employee compensation and benefits Carrying value as of the balance sheet date of obligations incurred through that date and payable for external research, development and manufacturing expenses. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued External Research, Development And Manufacturing Expenses, Current External research, development and manufacturing expenses Accrued Professional Fees, Current Professional and consultant fees Accrued Income Taxes, Current Income taxes payable Other Accrued Liabilities, Current Other Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Represents information pertaining to office space in Waltham, Massachusetts. Office Space In Waltham, Massachusetts [Member] Office space in Waltham Waltham Sublease Represents information pertaining to office space in Shanghai, China. Office Space In Shanghai, China [Member] Office space in Shanghai Lessee, Lease, Description [Line Items] Leases Lessee, Operating Lease, Term of Contract Lease term Aggregate amount of fixed payments pursuant to operating lease. Lessee, Operating Lease, Aggregate Fixed Lease Payment Total fixed payments Amount of guarantee by an irrevocable letter of credit agreement for the benefit of landlord pursuant to operating lease. Lessee, Operating Lease, Irrevocable Letter Of Credit Agreement, Guarantee Amount Guarantee amount to landlord under irrevocable letter of credit agreement Lessee, Operating Lease, Existence of Option to Extend [true false] Option to extend Lessee, Operating Lease, Renewal Term Additional lease term on extension Operating Lease, Expense Total lease cost for operating leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Maturities of the operating lease liabilities Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year 2024 (remaining three months) Lessee, Operating Lease, Liability, to be Paid, Year One 2025 Lessee, Operating Lease, Liability, to be Paid Total future minimum lease payments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less: imputed interest Operating Lease, Liability Total operating lease liabilities Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Represents information pertaining to license agreement with Bristol-Myers Squibb. License Agreement With Bristol Myers Squibb [Member] BMS Agreement Amount of cash inflow from upfront payment received pursuant to the agreement. Collaborative Arrangement, Upfront Payment, Received Amount of upfront cash payment received Amount of receivable from development, regulatory, and sales milestone payments if certain milestones are successfully achieved. Collaborative Arrangement, Development, Regulatory and Sales Milestone Payments, Receivable, Maximum Maximum amount of payments receivable Revenue from Collaborative Arrangement, Excluding Revenue from Contract with Customer Amount of reduction to research and development expenses Amount of receivable in the collaborative arrangement. Collaborative Arrangement, Receivables Amount receivable Represents information pertaining to 2020 Xencor Agreement. Xencor Agreement 2020 [Member] 2020 Xencor Agreement Represents information pertaining to 2021 Xencor Agreement. Xencor Agreement 2021 [Member] 2021 Xencor Agreement Represents information pertaining to Dianthus Option Agreement. Dianthus Option Agreement [Member] Dianthus Option Agreement Represents information pertaining to Viridian Agreement. Viridian Agreement [Member] Viridian Agreement Amount of reimbursable expenses incurred pursuant to the agreement. License and Option Agreements, Reimbursable Expenses Reimbursable costs The amount of development milestone payment incurred in connection with the agreement during the period. License and Option Agreements, Development Milestone Payment Development milestone expense Denotes number of antibody product candidates. Number Of Antibody Product Candidates Number of antibody product candidates Denotes threshold period to notify intention for exercising option. Threshold Period To Notify Intention For Exercising Option Threshold period to notify intention for exercising option The amount of development milestone payable in connection with the agreement during the period. License and Option Agreements, Development Milestone Payable Development milestone expense payable Temporary Equity, by Class of Stock [Table] Private Placement [Member] Private financing Related Party Transaction [Axis] Related Party Transaction [Domain] Represents information relating to 2021 convertible promissory notes. Convertible Promissory Notes 2021 [Member] Convertible notes Temporary Equity [Line Items] Convertible Preferred Stock Amount to be received per share that is classified as temporary equity by entity upon sale of convertible preferred stock. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. Temporary Equity, Shares Issued, Price Per Share Purchase price per share Proceeds from Issuance of Convertible Preferred Stock Net cash proceeds from issuance Number of convertible preferred stock classified as temporary equity issued upon exercise of warrants during the period. Temporary Equity, Stock Issued During Period, Shares, Warrant Exercises Number of shares issued upon exercise of warrants The amount of development milestone payment incurred in connection with the agreement during the period. License and Option Agreement, Development Milestone Payment Development milestone expense Number of convertible preferred stock classified as temporary equity issued in connection with the development milestone payments. Temporary Equity, Shares Issued During Period For Development Milestone Payment Number of shares issued in pursuant to development milestone payment The gross proceeds from initial public offering before deduction of underwriter discounts and offering expenses. Proceeds From Issuance Initial Public Offering, Before Deduction Of Underwriter Discounts And Offering Expenses Gross proceeds from initial public offering Aggregate number of common shares issued upon conversion of convertible preferred stock. Preferred Stock, Convertible, Aggregate Number Of Shares Issued Upon Conversion Number of common shares issued upon conversion of convertible preferred stock Number of common shares issuable upon conversion of Convertible preferred stock classified as temporary equity. Temporary Equity, Common Stock Issuable Upon Conversion Common Stock Issuable Upon Conversion Number of votes per share entitled to each holder of convertible preferred stock. Temporary Equity, Number of Votes per Share Convertible preferred stock, number of votes per share Preferred Stock, Convertible, Conversion Ratio Conversion ratio Preferred Stock, Dividend Rate, Percentage Dividend rate, percentage Dividends, Preferred Stock Dividends declared Payments of Ordinary Dividends, Preferred Stock and Preference Stock Dividends paid Number of votes per share entitled to each holder of common stock. Common Stock, Number Of Votes Per Share Number of votes per share Number of common shares issuable upon conversion of Convertible preferred stock classified as temporary equity. Temporary Equity, Common Stock Issuable Upon Conversion of Preferred stock Conversion of outstanding shares of convertible preferred stock Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Balance outstanding at ending (in shares) Balance at beginning (in shares) Options to purchase common stock Remaining number of common stock reserved for future issuance. Remaining Common Stock, Capital Shares, Reserved For Future Issuance Remaining shares reserved for future issuance Common Stock, Capital Shares Reserved for Future Issuance Number of common stock remain available for future grant Total Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Plan Name [Axis] Plan Name [Domain] Represents the information pertaining to 2020 Plan. Two Thousand Twenty Plan [Member] 2020 Plan Represents the information pertaining to 2024 Equity Incentive Plan. Equity Incentive Plan 2024 [Member] 2024 Plan Represents the information pertaining to 2024 Employee Stock Purchase Plan . Employee Stock Purchase Plan 2024 [Member] 2024 ESPP Vesting [Axis] Vesting [Domain] Share-Based Payment Arrangement, Tranche One [Member] Vesting on the anniversary of the vesting commencement Share-Based Payment Arrangement, Tranche Two [Member] Vesting in equal monthly installments over the subsequent thirty-six (36) months Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Stock-Based Compensation Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Vesting period (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Vesting percentage (%) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Number of shares authorized to issue under plan Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum Percentage of outstanding stock maximum Maximum additional number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock. Share Based Compensation Arrangement by Share-Based Payment Award, Additional shares authorized, Percentage of Outstanding Stock Maximum Maximum additional number of outstanding capital stock percent Maximum number of additional shares to be authorized for issuance under share-based payment arrangement. Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Additional Shares To Be Authorized Additional shares To Be authorized Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Issuance of common stock in period Share-Based Payment Arrangement, Expense Total stock-based compensation expense Stock-based compensation expense Restricted Stock [Member] RSA Unvested restricted stock Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unvested as of ending (Shares) Unvested as of beginning (Shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Vested (shares) The number of equity-based payment instruments, excluding stock (or unit) options, that repurchased during the reporting period. Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Repurchased in Period Repurchased (shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [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 Unvested as of ending ($ per share) Unvested as of beginning ($ per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested ($ per share) The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan repurchased during the period. Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Repurchased in Period, Weighted Average Grant Date Fair Value Repurchased ($ per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Number of RSAs granted (shares) Options to purchase common stock Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Maximum term of options granted (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Forfeited or cancelled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Options vested and exercisable at ending (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Options vested and expected to vest ending (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted-Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Balance outstanding at ending (in dollars per share) Balance at beginning (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Forfeited or cancelled (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Options vested and exercisable at ending (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Options vested and expected to vest at ending (in dollars per share) No definition available. Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term [Abstract] Weighted-Average Remaining Contractual Term (In years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Balance outstanding at ending (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Options vested and exercisable at ending (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Options vested and expected to vest at ending (in years) No definition available. Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Aggregate Intrinsic Value [Abstract] Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Balance outstanding at ending Balance at beginning Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Options vested and exercisable at ending Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Options vested and expected to vest at ending Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Unrecognized compensation cost related to unvested stock options Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Weighted average period over which unrecognized compensation cost is expected to be recognized Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Domain] Research and Development Expense [Member] Research and development General and Administrative Expense [Member] General and administrative Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Stock-Based Compensation Expense Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Numerator: Amount of noncumulative undeclared convertible preferred stock dividends for the basic earnings (loss) per share or per unit calculation. Noncumulative Undeclared Convertible Preferred Stock Dividends, Basic Less: Noncumulative undeclared convertible preferred stock dividends Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Less: Earnings attributable to participating securities Net Income (Loss) Available to Common Stockholders, Basic Net (loss) income attributable to common stockholders - basic Net Income (Loss) Available to Common Stockholders, Diluted Net (loss) income attributable to common stockholders - diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Denominator: Weighted Average Number of Shares Outstanding, Diluted, Adjustment Dilutive effect of outstanding preferred stock and common stock options Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Convertible Preferred Stock [Member] Convertible preferred stock Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Net (Loss) Income Per Share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive securities excluded from computation of diluted net (loss) per share Related Party Transaction [Table] Counterparty Name [Axis] Counterparty Name [Domain] Represents information pertaining to Xencor, Inc. Xencor, Inc [Member] Xencor Represents information pertaining to Viridian Therapeutics, Inc. Viridian Therapeutics, Inc [Member] Viridian Represents information pertaining to Dianthus Therapeutics Inc. Dianthus Therapeutics Inc [Member] Dianthus Legal Entity [Axis] Entity [Domain] Represents the member information pertaining to Fairmount Funds Management LLC. Fairmount Funds Management LLC [Member] Fairmount Funds Management LLC Related Party Transaction [Line Items] Related Party Transactions Number of antibody product candidates for which license has been obtained. Related Party Transaction, Number of Antibody Product License Obtained Number of antibody product candidates Number of license agreements. Related Party Transaction, Number of License Agreements Number of license agreements Equity Ownership, Excluding Consolidated Entity and Equity Method Investee, Percentage Equity interest held (in percent) Amount of reimbursable costs incurred with the related party. Related Party Transaction, Reimbursable Costs Reimbursable costs The percentage of ownership of the entity's common stock by a related party. Ownership Percentage by Related Party Ownership percentage by related party Maximum amount of reimbursable patent-related costs incurred with the related party Related Party Transaction Reimbursable Patent Related Costs, Maximum Reimbursable patent Number of seats held in the board of related entity. Number of Seats Held in Board Number of seats held in board Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent event Subsequent Event [Line Items] Subsequent event Term of lessee's operating sublease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Lessee, Operating Sublease, Term of Contract Initial term Lessee, Operating Sublease, Existence of Option to Extend [true false] Term extension for additional years Amount of undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating sublease. Lessee, Operating Sublease, Liability, Undiscounted Excess Amount Rental Payment Amount of early termination fee pursuant to operating sublease. Operating Sublease, Early Termination Fee Early termination fee Amount of non-refundable upfront fee in the collaborative arrangement. Collaborative Arrangement, Non Refundable Upfront Fee Non-refundable upfront fee Maximum amount of payment receivable on achievement of certain regulatory and commercial milestones in the collaborative arrangement. Collaborative Arrangement, Regulatory And Commercial Milestones, Maximum Payment Receivable On Achievement of Milestone Maximum payment receivable