Class of Stock [Axis] Series A Convertible Preferred Stock [Member] Location, Statement of Income, Balance [Axis] Equity Components [Axis] Common Stock [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Treasury Stock, Common [Member] Parent [Member] Noncontrolling Interest [Member] Investment, Name [Axis] The Wistar Institute [Member] Sale of Stock [Axis] At the Market Equity Offering [Member] Title and Position [Axis] Employees and Directors [Member] Consultants [Member] Employees and Consultants [Member] Plan Name [Axis] 2018 Share Plan [Member] Statistical Measurement [Axis] Minimum [Member] Maximum [Member] Award Type [Axis] Share-Based Payment Arrangement, Option [Member] Employee Stock Purchase Plan [Member] Warrant [Member] 2010 Share Plan [Member] Exercise Price Range [Axis] Range One [Member] Range Two [Member] Range Three [Member] Measurement Frequency [Axis] Fair Value, Recurring [Member] Fair Value Hierarchy and NAV [Axis] Fair Value, Inputs, Level 1 [Member] Cash and Cash Equivalents [Axis] Money Market Funds [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Exchange Traded Funds [Member] US Treasury Securities [Member] Antidilutive Securities [Axis] Geographical [Axis] Almaden Expressway San Jose [Member] Other Commitments [Axis] License Agreement [Member] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Research And Development Agreements [Member] Segments [Axis] Cancer Vaccines [Member] CAR-T Therapeutics [Member] Other [Member] Cover [Abstract] Document Type Amendment Flag Amendment Description Document Registration Statement Document Annual Report Document Quarterly Report Document Transition Report Document Shell Company Report Document Shell Company Event Date Document Period Start Date Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Current Fiscal Year End Date Entity File Number Entity Registrant Name Entity Central Index Key Entity Primary SIC Number Entity Tax Identification Number Entity Incorporation, State or Country Code Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Three Entity Address, City or Town Entity Address, State or Province Entity Address, Country Entity Address, Postal Zip Code Country Region City Area Code Local Phone Number Extension Written Communications Soliciting Material Pre-commencement Tender Offer Pre-commencement Issuer Tender Offer Title of 12(b) Security No Trading Symbol Flag Trading Symbol Security Exchange Name Title of 12(g) Security Security Reporting Obligation Annual Information Form Audited Annual Financial Statements Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Elected Not To Use the Extended Transition Period Document Accounting Standard Other Reporting Standard Item Number Entity Shell Company Entity Public Float Entity Bankruptcy Proceedings, Reporting Current Entity Common Stock, Shares Outstanding Documents Incorporated by Reference [Text Block] Entity Listing, Par Value Per Share Statement [Table] Statement [Line Items] ASSETS Current assets: Cash and cash equivalents Short-term investments Receivables Prepaid expenses and other current assets Total current assets Operating lease right-of-use asset Total assets LIABILITIES AND EQUITY Current liabilities: Accounts payable Accrued expenses Operating lease liability Total current liabilities Operating lease liability, non-current Total liabilities Commitments and contingencies (Note 10) Equity: Shareholders’ equity: Preferred stock, value Common stock, par value $.01 per share; 100,000,000 shares authorized; 33,922,776 and 33,013,829 shares issued and outstanding as of April 30, 2026 and October 31, 2025, respectively Additional paid-in capital Accumulated deficit Total shareholders’ equity Noncontrolling interest (Note 2) Total equity Total liabilities and equity Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Common stock, par value Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Income Statement [Abstract] Revenue Operating expenses: Research and development expenses (including non-cash stock-based compensation expenses of $286, $417, $624 and $814, respectively) General and administrative expenses (including non-cash stock-based compensation expenses of $379, $571, $837 and $1,229, respectively) Total operating expenses Loss from operations Interest income Net loss Less: Net loss attributable to noncontrolling interest Net loss attributable to common shareholders Net loss per common share attributable to common shareholders: Basic Diluted Weighted average common shares outstanding: Basic Diluted Non-cash stock-based compensation expenses Balance Balance, shares Stock option compensation to employees and directors Stock options issued to consultants Common stock issued in an at-the-market offering, net of offering expenses Common stock issued in an at-the-market offering, net of offering expenses, shares Common stock issued pursuant to an employee stock purchase plan Common stock issued pursuant to an employee stock purchase plan, shares Cancelation of treasury shares Cancelation of treasury shares, shares Common stock issued upon exercise of stock options Common stock issued upon exercise of stock options, shares Net loss Balance Balance, shares Statement of Cash Flows [Abstract] Offering expenses Cash flows from operating activities: Reconciliation of net loss to net cash used in operating activities: Stock option compensation to employees and directors Stock options issued to consultants Amortization of operating lease right-of-use asset Amortization of discount on held-to-maturity securities Change in operating assets and liabilities: Receivables Prepaid expenses and other current assets Accounts payable Accrued expenses Operating lease liability Net cash used in operating activities Cash flows from investing activities: Disbursements to acquire short-term investments Proceeds from maturities of short-term investments Net cash provided by investing activities Cash flows from financing activities: Proceeds (expenses) from sale of common stock in an at-the-market offering, net of offering expenses of $135 and $51, respectively Proceeds from sale of common stock pursuant to an employee stock purchase plan Proceeds from exercise of stock options Net cash provided by financing activities Net increase in cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Organization, Consolidation and Presentation of Financial Statements [Abstract] BUSINESS AND FUNDING Accounting Policies [Abstract] SIGNIFICANT ACCOUNTING POLICIES Share-Based Payment Arrangement [Abstract] STOCK-BASED COMPENSATION Fair Value Disclosures [Abstract] FAIR VALUE MEASUREMENTS Payables and Accruals [Abstract] ACCRUED EXPENSES Earnings Per Share [Abstract] NET LOSS PER SHARE OF COMMON STOCK Effect Of Recently Adopted And Issued Pronouncements EFFECT OF RECENTLY ADOPTED AND ISSUED PRONOUNCEMENTS Income Tax Disclosure [Abstract] INCOME TAXES Leases LEASES Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCES Segment Reporting [Abstract] SEGMENT INFORMATION Basis of Presentation Noncontrolling Interest Revenue Recognition Cost of Revenues Research and Development Expenses Investment Policy SCHEDULE OF CHANGES IN NONCONTROLLING INTEREST Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] SCHEDULE OF OPTION ACTIVITY SCHEDULE OF OPTIONS OUTSTANDING AND EXERCISABLE SCHEDULE OF FINANCIAL ASSETS MEASURED AT FAIR VALUE ON A RECURRING BASIS SCHEDULE OF ACCRUED EXPENSES SCHEDULE OF MINIMUM LEASE PAYMENTS SCHEDULE OF SEGMENT INFORMATION BusinessAndFundingTable [Table] BusinessAndFundingLineItems [Line Items] Percentage of common stock issued Equity stake percentage Cash, cash equivalents and short-term investments Reduction in cash, cash equivalents and short-term investments Value of common stock issued Number of common stock issued Value of additional shares available for sale Beginning balance Net loss attributable to noncontrolling interest Ending balance Revenue recognition percentage Shares, Options Outstanding Beginning Balance Weighted Average Exercise Price Per Share, Outstanding Beginning Balance Shares, Granted Weighted Average Exercise Price Per Share, Granted Shares Options, Exercised Weighted Average Exercise Price Per Share, Option Exercised Shares, Forfeited/expired Weighted Average Exercise Price Per Share, Forfeited/expired Shares, Options Outstanding Ending Balance Shares, Options Outstanding, Exercisable Weighted Average Exercise Price Per Share, Outstanding Ending Balance Weighted Average Exercise Price Per Share, Exercisable Aggregate Intrinsic Value, Outstanding Aggregate Intrinsic Value, Exercisable Range of Exercise Prices, Lower Limit Range of Exercise Prices, Upper Limit Number of Outstanding Number of Exercisable Weighted Average Remaining Contractual Life (in years) Weighted Average Exercise Price Number Outstanding, Options Outstanding Weighted Average Remaining Contractual Life, Options Outstanding Weighted Average Exercise Price, Options Outstanding Options Exercisable Weighted Average Remaining Contractual Life, Options Exercisable Weighted Average Exercise Price, Options Exercisable Stock-based compensation Shares options, granted Share exercise price Common stock issued upon exercise of stock options Common stock issued upon exercise of stock options, value Shares available for future grants Employees purchase shares percentage Shares purchased Shares purchased, value Class of Warrant or Right, Outstanding Warrants Outstanding Weighted Average Exercise Price Per Share, Warrants Outstanding Warrants Expired Warrants Outstanding Warrants Exercisable Weighted Average Exercise Price Per Share, Warrants outstanding Weighted Average Exercise Price Per Share, Warrants Exercisable Aggregate Intrinsic Value, Warrants Outstanding Aggregate intrinsic value, Warrants exercisable Treasury stock, common shares Treasury stock repurchased, average cost Treasury stock total cost Fair Value, Recurring and Nonrecurring [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash equivalents Short-term investments Total financial assets Payroll and related expenses Accrued royalty and contingent legal fees Accrued other Accrued expenses Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive shares Unrecognized income tax benefits LeasesTable [Table] LeasesLineItems [Line Items] Area of office space Lease expiration date Lease option to extend Base rent Annual rent increase percentage Right-of-use asset and lease liability Discount rate Rent expense Remaining lease term Schedule Of Minimum Lease Payments 2026 (remaining) 2027 2028 2029 Total future minimum lease payments, undiscounted Less: Imputed interest Present value of future minimum lease payments Total Other Commitments [Table] Other Commitments [Line Items] License commitment Payments for research and development Segment Reporting [Table] Segment Reporting [Line Items] Revenues Research and development expenses General and administrative expenses Total operating expenses Less non-cash stock-based compensation Operating expenses excluding non-cash stock-based compensation (a non-GAAP measure) Total assets Number of reportable segments Series A Convertible Preferred Stock [Member] Adjustments to additional paid in capital options issued. Percentage of common stock issued. The Wistar Institute [Member] At the Market Equity Offering [Member] Noncontrolling Interest [Policy Text Block] Schedule Of Changes In Noncontrolling Interest [Table Text Block] Revenue recognition percentage. Employees and Directors [Member] Consultants [Member] Employees and Consultants [Member] 2018 Share Plan [Member] 2010 Share Plan [Member] Range One [Member] Range Two [Member] Range Three [Member] Employee Stock Purchase Plan [Member] Number of equity instruments other than options exercisable, including both vested and non-vested instruments. Share based compensation arrangement by share based payment award non option equity instruments outstanding weighted average exercise price. Weighted Average Exercise Price Per Share, Warrants Exercisable. Share based compensation arrangement by share based payment award non option equity instruments aggregate intrinsic value exercisable. Share based compensation arrangement by share based payment award non option equity instruments aggregate intrinsic value outstanding. Effect Of Recently Adopted And Issued Pronouncements [Text Block] Almaden Expressway San Jose [Member] Base rent. Annual rent increase percentage. License Agreement [Member] Research And Development Agreements [Member] Cancer Vaccines [Member] CAR-T Therapeutics [Member] Other [Member] Non-cash share-based compensation. Share based compensation arrangement by share based payment award equity instruments other than options expired Assets, Current Liabilities, Current Liabilities Equity, Attributable to Parent Equity, Including Portion Attributable to Noncontrolling Interest Liabilities and Equity Operating Income (Loss) Net Income (Loss) Attributable to Parent Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Diluted Shares, Outstanding Shares Issued, Shares, Share-Based Payment Arrangement, Forfeited Share-Based Payment Arrangement, Noncash Expense Issuance of Stock and Warrants for Services or Claims Investment Income, Net, Amortization of Discount and Premium Increase (Decrease) in Receivables Increase (Decrease) in Prepaid Expense and Other Assets Increase (Decrease) in Accounts Payable Increase (Decrease) in Accrued Liabilities Increase (Decrease) in Operating Lease Liability Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Payments to Acquire Short-Term Investments Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation 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, Outstanding, Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice Share based compensation arrangement by share based payment award equity instruments other than options expired ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableNumber ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageExercisePrice SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionEquityInstrumentsAggregateIntrinsicValueOutstanding SharebasedCompensationArrangementBySharebasedPaymentAwardNonOptionEquityInstrumentsAggregateIntrinsicValueExercisable Investments, Fair Value Disclosure Lessee, Operating Lease, Liability, to be Paid Lessee, Operating Lease, Liability, Undiscounted Excess Amount NoncashSharebasedCompensation Operating Costs and Expenses