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Document Fiscal Year Focus Deemed dividend on redeemable convertible preferred stock issuances Preferred Stock Dividends, Income Statement Impact Number of Outstanding Options, Forfeited/Expired Number of Outstanding Options, Forfeited/Expired Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Total Proceeds from initial public offering, net of issuance costs Proceeds from Issuance Initial Public Offering City Area Code Total current liabilities Liabilities, Current Accrued expenses and other current liabilities Accrued Liabilities and Other Liabilities Reclassification of common stock Conversion of redeemable convertible preferred stock, shares Stock Issued During Period, Shares, Conversion of Convertible Securities Organization, Consolidation and Presentation of Financial Statements [Abstract] Local Phone Number Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Additional paid-in capital Additional Paid in Capital Additional Paid in Capital, Total Classification of Redeemable Convertible Preferred Stock Stockholders' Equity Note, Redeemable Preferred Stock, Issue, Policy [Policy Text Block] Commitments and Contingencies Disclosure [Abstract] Redeemable convertible preferred stock: Temporary Equity [Abstract] Fair Value, by Balance Sheet Grouping [Table] Operating lease liabilities, current portion Operating Lease, Liability, Current Underwriters [Member] Underwriters. Summary of Redeemable Convertible Preferred Stock Schedule of Conversions of Stock [Table Text Block] Accumulated Deficit Retained Earnings [Member] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Payments to Acquire Property, Plant, and Equipment, Total Purchases of property and equipment Document Transition Report Other assets Other assets Increase (Decrease) in Other Operating Assets Increase (Decrease) in Other Operating Assets, Total Percentage of sale of common stock at fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent 2026 Lessee, Operating Lease, Liability, to be Paid, Year Two Antidilutive Security, Excluded EPS Calculation [Table] Net loss Temporary Equity, Net Income Issuance of Series F redeemable convertible preferred stock (inclusive of deemed dividend of $410 to accrete to redemption value), value Issuance Of Redeemable Convertible Preferred Stock Issuance of redeemable convertible preferred stock. Weighted Average Exercise Price, Exercised Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Minimum [Member] Minimum Common Stock Common Stock [Member] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Aggregate Intrinsic Value, Vested and expected to vest Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Additional Paid-in Capital Additional Paid-in Capital [Member] Deferred offering costs Deferred Offering Cost Deferred offering cost. Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] License and Collaboration Agreements [Line Items] License and collaboration agreements. Statement of Income Location, Balance [Domain] 2025 Lessee, Operating Lease, Liability, to be Paid, Year One Other assets Other Assets, Noncurrent Collaboration agreement transaction price Collaboration Agreement Transaction Price Collaboration agreement transaction price. Significant Accounting Policy [Line Items] Significant accounting policy. Entity Common Stock, Shares Outstanding Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Accrued expenses and other current liabilities Series B Redeemable Convertible Preferred Stock Series B Redeemable Convertible Preferred Stock [Member] Series b redeemable convertible preferred stock. External Research and Development Expenses External Research and Development Expenses [Member] External research and development expenses. Series E Redeemable Convertible Preferred Stock Series E Redeemable Convertible Preferred Stock [Member] Series e redeemable convertible preferred stock. Increase (Decrease) in Accounts and Other Receivables Accounts receivable - other Common Stock, Value, Issued Common stock, $0.0001 par value per share; 700,000,000 and 493,530,000 shares authorized as of June 30, 2024 and December 31, 2023, respectively; 66,659,852 and 5,222,283 shares issued and outstanding as of June 30, 2024 and December 31, 2023, respectively Interest income, net Investment Income, Interest Purchase of redeemable convertible preferred stock Payments for Repurchase of Convertible Preferred Stock Total future minimum lease obligations Total future minimum lease obligations Operating Lease, Liability Royalties Royalties Royalties. Measurement Frequency [Axis] Components of Accrued Expenses and Other Current Liabilities Schedule of Accrued Liabilities [Table Text Block] Commitments and contingencies Commitments and Contingencies Weighted-average common shares outstanding, diluted Weighted average shares of common stock outstanding, diluted Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Number of Outstanding Options, Vested and expected to vest Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Total lease payment Lessee, Operating Lease, Liability, to be Paid Entity Small Business Lepu Biotech Co., Ltd. Lepu Biotech Co., Ltd. [Member] Lepu Biotech Co., Ltd. Debt Debt Disclosure [Text Block] Reverse stock split conversion ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Success fee liability, current portion Success Fee Liability, Current Portion Success fee liability, current portion. Series C Redeemable Convertible Preferred Stock Series C Redeemable Convertible Preferred Stock [Member] Series c redeemable convertible preferred stock. Accounts receivable - other Accounts and Other Receivables, Net, Current Deemed dividend Cumulative redeemable convertible preferred stock dividends Cumulative redeemable convertible preferred stock dividends Redeemable Preferred Stock Dividends Reserved for future stock option issuances. Reserved For Future Stock Option Issuances [Member] Reserved for Future Stock Option Issuances Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Weighted Average Exercise Price, Ending Balance Weighted Average Exercise Price, Beginning Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Accrued Expenses and Other Current Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Danforth Advisors, LLC Danforth Advisors, LLC [Member] Danforth Advisors, LLC. Rule 10b5-1 Arrangement Modified Rule 10b5-1 Arr Modified Flag Rule 10b5-1 Arr Modified Flag. Asset Class [Axis] Measurement Frequency [Domain] Maximum number of shares per employee (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Per Employee 2024 Plan Two Thousand Twenty Four Plan [Member] Two thousand twenty four plan. Shares outstanding Ending balance, shares Beginning balance, shares Redeemable convertible preferred stock, shares outstanding Temporary Equity, Shares Outstanding Level 3 Fair Value, Inputs, Level 3 [Member] Weighted-average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Subsequent Events Subsequent Events [Text Block] Accounts payable Accounts Payable, Current Accounts Payable, Current, Total Deferred offering costs Deferred Offering Costs Liabilities Liabilities, Fair Value Disclosure Liabilities, Fair Value Disclosure, Total Amortization of loan fees Amortization of Loan Fees Amortization of loan fees.