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Share based compensation, contractual term Operating Segments [Member] Operating Segments Government Assistance, Type [Domain] Asset, Impairment Loss Asset, Impairment Loss, Total Impairment expense Contract with Customer, Liability Contract with Customer, Liability, Total Beginning Balance Ending Balance Accrued Income Taxes, Current Accrued taxes Debt Securities, Available-for-Sale, Amortized Cost Amortized Cost Amortized Cost Subsequent Event Type [Domain] Other Comprehensive Income (Loss), before Tax [Abstract] Other comprehensive loss: Nonoperating Income (Expense) Nonoperating Income (Expense), Total Interest income and other income (expense), net Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Restricted common stock shares issued Schedule of Long-Term Debt Instruments [Table] Chief Operating Officer [Member] Chief Operating Officer General and Administrative Expense General and Administrative Expense, Total General and administrative General and administrative Income Statement [Abstract] Due in 3 years Available for Sale Securities Debt Maturities Rolling Year Due in Three Fair Value Available for sale securities debt maturities rolling year due in three fair value. Net loss per share attributable to common stockholders, basic Earnings Per Share, Basic Earnings Per Share, Basic, Total Basic Document Period End Date Convertible Notes Payable Convertible Notes Payable, Total Convertible promissory note, amount outstanding Convertible notes payable Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Share-based payment award, expiration period Payments to Acquire Property, Plant, and Equipment Payments to Acquire Property, Plant, and Equipment, Total Purchases of property and equipment Debt Instrument [Line Items] Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted average exercise price, options granted Common Stock, Shares Authorized Common stock, shares authorized Statement of Stockholders' Equity [Abstract] Prepaid Expense and Other Assets, Current Total Prepaid expenses and other current assets Available for Sale Securities Debt Maturities Rolling Year One Through Two Fair Value Available for sale securities debt maturities rolling year one through two fair value. Due in 1 - 2 years Investments [Domain] Temporary Equity Disclosure [Abstract] Convertible promissory note interest rate Debt Instrument, Interest Rate, Stated Percentage Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Assets Total assets Title of 12(b) Security Distribution Payable Initial distribution amount of CIRM Temporary Equity [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Beginning Balance Restricted stock awards outstanding, non-employee consultants Reclassification, Comparability Adjustment [Policy Text Block] Reclassifications Issuance of common stock upon exercise of stock options, Amount Stock Issued During Period, Value, Stock Options Exercised Single Reporting Segment [Member] Single Reporting Segment. Single Reporting Segment Schedule of Stock Based Compensation Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Stock options grant in period Number of shares available for grant, granted Granted performance-based stock option awards Title and Position [Domain] Customer Concentration Risk [Member] Customer Concentration Risk Antidilutive Securities, Name [Domain] Stockholders' Equity Note, Stock Split, Conversion Ratio Reverse stock split ratio Proceeds from Issuance of Private Placement Aggregate gross proceeds Payments for Royalties Royalties Cash and Cash Equivalents [Domain] Weighted average remaining contractual term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term Contract with Customer, Asset, after Allowance for Credit Loss, Current Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total Contract assets Disaggregation of Revenue [Table Text Block] Schedule of Revenue from Collaboration Partners Segment Reporting [Table Text Block] Schedule of Segment Reporting Increase (Decrease) in Operating Lease Liability Operating lease liabilities Cash Cash Net loss per share attributable to common stockholders Earnings Per Share, Diluted [Abstract] Beginning Balance, Amount Equity, Attributable to Parent Ending Balance, Amount Total stockholders' deficit Unaudited Interim Financial Information [Policy Text Block] Unaudited interim financial information. 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Contingent milestones due and payable Number of reportable segments Number of Reportable Segments Stockholders' Equity Note [Abstract] Revenue Benchmark [Member] Revenue Benchmark Basis of Accounting, Policy [Policy Text Block] Basis of Preparation Stock, Class of Stock [Table] Temporary Equity, Par or Stated Value Per Share Redeemable convertible preferred stock, Par Value Original Issue Price Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Unrealized Gains Unrealized Gains Restricted Common Stock Restricted Stock [Member] Proceeds from Stock Options Exercised Proceeds from exercise of stock options Statistical Measurement [Axis] Money Market Funds [Member] Money Market Funds Entity Interactive Data Current Convertible note, fair value Convertible Debt, Fair Value Disclosures Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Expected volatility, maximum Gain (Loss) on Extinguishment of Debt Gain (Loss) on Extinguishment of Debt, Total Change in fair value of Convertible Note Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Common Stock, Value, Issued Common stock, $0.001 par value, 52,000,000 shares authorized as of June 30, 2026 and December 31, 2025; 2,485,234 and 2,451,167 shares issued and outstanding as of June 30, 2026 and December 31, 2025 Fair Value, off-Balance-Sheet Risk [Table] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Computation of Basic and Diluted Net Loss per Common Share Preferred Stock [Text Block] Redeemable Convertible Preferred Stock Business Description and Basis of Presentation [Text Block] Business Organization and Liquidity Cash, Cash Equivalent, and Marketable Security [Text Block] Marketable Securities Summary of Significant Accounting Policies [Line Items] Line items represent summary of significant accounting policies. 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Future commercial milestone payments Future Development and Regulatory Milestone Payments Future development and regulatory milestone payments. 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Computer Equipment and Software Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Issued and Outstanding, Vested and Exercisable Share-based compensation arrangement by share-based payment award, options, issued and outstanding, vested and exercisable. Options issued and outstanding, vested and exercisable Long-Lived Asset, Class [Axis] Subsequent Events [Text Block] Subsequent Events Fair Value Hierarchy and NAV [Axis] Common Stock Warrants issued and outstanding Common Stock Warrants Issued and Outstanding [Member] Common Stock Warrants issued and outstanding Debt Securities, Available-for-Sale, Term Remaining contractual maturities of available-for-sale Government Assistance, Award Amount Aggregate CIRM funding amount Property, Plant, and Equipment [Line Items] Labor and Related Expense Employee-related expenses Employee-related expenses Series A redeemable convertible preferred stock. Series A Redeemable Convertible Preferred Stock Series A Debt Securities, Available-for-Sale Fair Value Total available-for-sale securities Schedule of Company Recognized Revenue From Collaboration Partners Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Operating Lease, Liability, Current Operating lease liabilities, current portion Concentration Risk Type [Domain] Customer [Domain] Liabilities and Equity Total liabilities, preferred stock, and stockholders' deficit Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Research and Development Expense Research and Development Expense, Total Research and development Research and development expenses Internal research expenses Internal research expenses Debt Securities, Available-for-Sale, Realized Loss Realized losses on available-for-sale securities Document Fiscal Period Focus Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Estimated Fair Value of Stock Options Using Black-Scholes Option Pricing Model Title and Position [Axis] Property, Plant, and Equipment [Table] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Issued and Outstanding, Forfeited or Cancelled Share-based compensation arrangement by share-based payment award, options, issued and outstanding forfeited or cancelled. Options issued and outstanding, forfeited or cancelled Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Issued and Outstanding, Exercised Share-based compensation arrangement by share-based payment award, options, issued and outstanding, exercised. Options issued and outstanding, exercised Performance Shares [Member] Performance-Based Stock Option Awards Sale of Stock [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Weighted average exercise price, vested and exercisable Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net change in cash, cash equivalents and restricted cash Net change in cash, cash equivalents and restricted cash Entity Current Reporting Status Use of Estimates, Policy [Policy Text Block] Use of Estimates Fair Value, Inputs, Level 1 [Member] Level 1 Class of Stock [Domain] Vesting Percentage Vesting percentage. Vesting percentage Government Assistance [Text Block] Government Grants Accounts payable Accounts Payable, Current Accounts Payable, Current, Total Investment Type [Axis] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Summary of Anti-dilutive Security not Included In Diluted per Share Calculations Financial Instrument [Axis] Assets, Fair Value Disclosure Assets, Fair Value Disclosure, Total Total financial Assets Other long-term assets Increase (Decrease) in Other Noncurrent Assets Document Transition Report Concentration Risk [Line Items] Commitments and Contingencies Disclosure [Abstract] Subsequent Event [Line Items] Liabilities, Current [Abstract] Current liabilities: Share-Based Payment Arrangement [Abstract] Government Grants Government Assistance [Policy Text Block] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Fair value at the beginning of the period Fair value at end of period Common Stock [Member] Common Stock Annual Cash Dividend Percentage on Issue Price The annual cash dividend percentage on issue price. Annual cash dividend percentage Statistical Measurement [Domain] Prepaid Expense, Current Prepaid Expense, Current, Total Prepaid expenses Debt Securities, Available-for-Sale [Line Items] Weighted-average shares outstanding subject to repurchase Weighted Average Number of Shares, Common Stock Subject to Repurchase or Cancellation Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic, Total Weighted-average shares used in computing net loss per share attributable to common stockholders, basic Assets [Abstract] Assets Accounts Payable and Accrued Liabilities, Current Total Entity Central Index Key Antidilutive Securities [Axis] Class of Stock [Line Items] Consolidation Items [Axis] Current Fiscal Year End Date Increase (Decrease) in Accrued Liabilities Increase (Decrease) in Accrued Liabilities, Total Accrued license fees Document Quarterly Report Convertible note matured Debt Instrument, Maturity Date Convertible promissory note, maturity date Debt Securities, Available-for-Sale [Table] Exercise of Outstanding Stock Option Awards [Member] Exercise of outstanding stock option awards Exercise of outstanding stock option awards Government Assistance, Liability Government Assistance, Liability, Total Government grant liabilities Cash and Cash Equivalents [Axis] Fair Value, Inputs, Level 2 [Member] Level 2 Weighted average exercise price, outstanding at ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted average exercise price, outstanding at beginning balance Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash used in operating activities Entity Incorporation, State or Country Code Government Assistance, Liability, Current Government grant liability Net loss per share attributable to common stockholders, diluted Earnings Per Share, Diluted Earnings Per Share, Diluted, Total Diluted Stockholders' Equity, Policy [Policy Text Block] Reverse Stock Split Net loss Net loss attributable to common stockholders Net Loss Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Aggregate intrinsic value Long-Lived Asset, Class [Domain] Cash, Cash Equivalents, and Short-Term Investments Cash, Cash Equivalents, and Short-Term Investments, Total Total cash, cash equivalents and available-for-sale investments Cash, cash equivalents and available-for-sale investments Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Preferred Stock, Conversion Basis Preferred stock conversion basis Comprehensive Income (Loss), Net of Tax, Attributable to Parent Net comprehensive loss Two Thousand Eighteen Stock Incentive Plan [Member] Two thousand eighteen stock incentive plan. 2018 Stock Incentive Plan Series B redeemable convertible preferred stock. 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Additions Sale of Stock, Price Per Share Offering price Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Due in 1 year or less Segment Reporting [Table] Entity File Number STX-Thousand Two Hundred [Member] STX-thousand two hundred. STX-1200 Fair Value Adjustment of Convertible Note Fair value adjustment of convertible note. 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