Commitment to spend, operational expenses, initial lease term Leasehold Interest, Operational Expenses, Commitment to Spend, Initial Lease Term Leasehold Interest, Operational Expenses, Commitment to Spend, Initial Lease Term Termination fee Collaboration Agreements, Termination Fee Collaboration Agreements, Termination Fee Business Acquisition Business Acquisition [Axis] Increase (Decrease) in Statements of Stockholders’ Deficit [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Total future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Net loss Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Related Party Transactions [Abstract] Related Party Transactions [Abstract] Accumulated Unrealized Losses on Debt Securities Classified as Available-for-Sale in Continuous Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Finance lease assets Finance Lease, Right-of-Use Asset, after Accumulated Amortization Maximum milestone payment due if certain conditions are met Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High Ownership percentage held by Executive Chairman and Global Chief Scientific and Medical Officer upon consummation of merger Ownership Percentage By Key Executives Ownership percentage by key executives. Related-party promissory notes, net of discount, less current portion (Note 9) Notes Payable, Related Parties, Noncurrent 2024 Long-Term Debt, Maturity, Year Two Discounted cash flow analysis Valuation Technique, Discounted Cash Flow [Member] Interest and investment income (loss), net Interest and investment income (loss), net Gain (Loss) on Investments Gain on disposal of lease Gain (Loss) on Termination of Lease Acquisitions Business Combinations Policy [Policy Text Block] Debt Instrument [Axis] Debt Instrument [Axis] ATM Offering Program At The Market Offering Program [Member] At-The-Market offering program. Present value of operating lease liabilities Finance Lease, Liability Gross property, plant and equipment Property, Plant and Equipment, Gross Maximum aggregate offering price Aggregate Market Price Of Shares That May Issue Under Registered Offering Aggregate market price of shares that may issue under a registered offering. Consideration for future services performed by related party Related Party Transaction, Expenses from Transactions with Related Party Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] 605 Nash, LLC Six Zero Five Nash, LLC [Member] Six Zero Five Nash, LLC Software Software and Software Development Costs [Member] 2015 Equity Incentive Plan Two Thousand Fifteen Equity Incentive Plan [Member] Two thousand fifteen equity incentive plan. Financial Instruments Investment [Text Block] Shares issued pursuant to litigation settlement Stock Issued During Period, Value, Litigation Settlement Stock Issued During Period, Value, Litigation Settlement Accounting Policies [Line Items] Accounting Policies [Line Items] Accounting policies. Financial Instruments Financial Instruments [Domain] Organized Workforce Organized Workforce [Member] Organized Workforce 2026 Finance Lease, Liability, to be Paid, Year Four Statistical Measurement Statistical Measurement [Domain] Research and Development [Abstract] Research and Development [Abstract] Depreciation expense related to property, plant and equipment Depreciation Exercise of stock options (in shares) Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period 2015 Share Repurchase Plan Two Thousand Fifteen Share Repurchase Plan [Member] 2015 share repurchase plan. Less: Tenant improvement allowance receivable Finance Lease, Liability, Tenant Improvement Allowance Receivable Finance Lease, Liability, Tenant Improvement Allowance Receivable Weighted average discount rate, Operating leases Operating Lease, Weighted Average Discount Rate, Percent Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Government-sponsored securities Agency Securities [Member] Proceeds from sales of marketable debt and equity securities Proceeds from Sale and Maturity of Marketable Securities Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Asset Acquisition [Table] Asset Acquisition [Table] Additional paid-in capital Additional Paid in Capital, Common Stock Effect of exchange rate changes on cash, cash equivalents, and restricted cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Lease-related payables Lease Related Payables Lease-related payables. 2025 Finance Lease, Liability, to be Paid, Year Three Net loss attributable to ImmunityBio common stockholders Net Income (Loss) Attributable to Parent Measurement Input Type [Domain] Measurement Input Type [Domain] Lessee Lease Description [Table] Lessee, Lease, Description [Table] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Contingent Consideration by Type Contingent Consideration by Type [Axis] Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Lease Arrangements Lessee, Finance Leases [Text Block] Initial Premises Initial Premises [Member] Initial Premises. 2022 (excluding the nine months ended September 30, 2022) Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Aggregate principal and accrued interest Notes Payable, Related Parties, Principal And Accrued Interest Notes Payable, Related Parties, Principal And Accrued Interest Reclassification of net realized gains on available-for-sale securities included in net loss Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Operating Leases Lessee, Operating Lease, Liability, to be Paid [Abstract] Percentage of annual increases of base rent Annual Percentage Increases To Base Rent Annual percentage increases to base rent. Accrued research and development costs Accrued Research And Development Costs Accrued research and development costs. Prepaid insurance Prepaid Insurance Equity Component Equity Component [Domain] Total assets measured at fair value Assets, Fair Value Disclosure Ownership Ownership [Axis] Stated interest rate Interest Rate Related Party Transaction, Rate Investment, Name [Domain] Investment, Name [Domain] Lease Arrangements Lessee, Operating Leases [Text Block] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Lessee Lease Description [Line Items] Lessee, Lease, Description [Line Items] Related Party Related Party [Domain] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Plan Name Plan Name [Axis] Altor Stockholders Altor Stockholders [Member] Altor Stockholders Fair Value Debt Securities, Available-for-Sale Net proceeds from related parties Total Notes Payable, Related Parties Summary of RSU Activity under Equity Plans Nonvested Restricted Stock Shares Activity [Table Text Block] Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Lease Contractual Term Lease Contractual Term [Domain] Unrecognized compensation cost related to non-vested stock options Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Plan Name Plan Name [Domain] 2022 (excluding the nine months ended September 30, 2022) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Entity Address, State or Province Entity Address, State or Province Level 1 Fair Value, Inputs, Level 1 [Member] Other comprehensive (loss) income, net of income taxes: Other Comprehensive Income (Loss), Net of Tax [Abstract] Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Award Type Award Type [Axis] Total consideration Asset Acquisition, Fair Value of Assets Acquired Asset Acquisition, Fair Value of Assets Acquired Contingent consideration arrangements, paid Business Combination, Contingent Consideration Arrangements, Settlements Business Combination, Contingent Consideration Arrangements, Settlements Contingent Consideration Type Contingent Consideration Type [Domain] Net cash used in operating activities Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Operating lease liabilities (including amounts with related parties) Operating lease liabilities Operating Lease, Liability, Current Government funding for leasehold build-out Leasehold Interest, Government Funding Receivable Leasehold Interest, Government Funding Receivable Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Cash Flow Operating Activities Lessee [Abstract] Cash Flow, Operating Activities, Lessee [Abstract] Tenant improvements incentive Incentive from Lessor Related Party Transaction Related Party Transaction [Domain] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Transaction Transaction [Domain] Liability Class Liability Class [Axis] Legal Entity Legal Entity [Axis] Shared Services Agreement Shared Services Agreement [Member] Shared services agreement. Total liabilities Liabilities Weighted average remaining lease term, Operating leases Operating Lease, Weighted Average Remaining Lease Term Sale of assets to an entity under common control Proceeds from Contributions from Affiliates Geographical Geographical [Axis] Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Annual payment for support of research activities Collaboration Agreements, Annual Payment For Support Of Research Activities Annual payment for support of research activities. Investment amortization expense, net Investment Income, Net, Amortization of Discount and Premium Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Altor BioScience, LLC Altor BioScience, LLC [Member] Altor BioScience, LLC Issuance of common stock under "at-the market" offering, net Stock Issued During Period, Value, New Issues Aggregate intrinsic value, vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Property, Plant and Equipment, Net Property, Plant and Equipment [Table Text Block] Prepaid expenses Prepaid Expense Document Type Document Type Weighted- Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Income Tax [Table] Income Tax [Table] Income tax. Potential contingent value rights to be earned Contingent Value Rights Obligations Contingent value rights obligations. Number of Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Forfeited/expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] 2023 through 2030 Collaborative Arrangement and Arrangement Other than Collaborative, Fee, Tranche Two [Member] Collaborative Arrangement and Arrangement Other than Collaborative, Fee, Tranche Two Nonvested, beginning balance (in dollars per share) Nonvested, ending balance (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 Amortization of related-party notes discounts Amortization Of Debt Discount (Premium), Related Party Amortization Of Debt Discount (Premium), Related Party Finance Leases Finance Lease, Liability, to be Paid [Abstract] Asset Acquisition [Axis] Asset Acquisition [Axis] Entity Shell Company Entity Shell Company Investment in joint venture – an equity method investment Payment to acquire interest in joint venture Payments to Acquire Interest in Joint Venture Ownership percentage acquired Percentage Of Wholly Owned Subsidiary Percentage of wholly-owned subsidiary. Employees Employees [Member] Employees 2023 Lessee, Operating Lease, Liability, to be Paid, Year One Contingent consideration arrangements, earned Business Combination, Contingent Consideration Arrangements, Earned Business Combination, Contingent Consideration Arrangements, Earned Financial Instrument Financial Instrument [Axis] 2025 Long-Term Debt, Maturity, Year Three Schedule of Supplemental Balance Sheet Information Related to Leases Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee Affiliated Entity Affiliated Entity [Member] Cash to be distributed in lieu of fractional shares (in dollars per share) Shares Issued, Cash Distributed In Lieu of Fractional Shares Shares Issued, Cash Distributed In Lieu of Fractional Shares Foreign bonds Foreign Government Debt [Member] Document Period End Date Document Period End Date Accrued compensation Accrued Salaries, Current Organization Consolidation And Presentation Of Financial Statements [Line Items] Organization Consolidation And Presentation Of Financial Statements [Line Items] Organization consolidation and presentation of financial statements. Summary of Fair Value of Assets Acquired Asset Acquisition [Table Text Block] Litigation [Line Items] Litigation [Line Items] Litigation. Total assets Assets Income Statement Location Income Statement Location [Axis] Total lease assets Lease, Right-Of-Use Asset Lease, Right-Of-Use Asset Antidilutive Securities Antidilutive Securities [Axis] Shares to be issued in private placement (in shares) Shares, Issued Accrued expenses and other liabilities Accrued Liabilities, Current Accrued Expenses and Other Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Base rent - monthly Base Monthly Rent Base monthly rent. Insurance claims receivable Insurance Settlements Receivable, Current Interest income Interest and Other Income Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Finite-lived intangible assets acquired Finite-Lived Intangible Assets Acquired Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities VivaBioCell VivaBioCell [Member] VivaBioCell. Accounting Policies [Abstract] Accounting Policies [Abstract] Duley Road, LLC Duley Road, LLC [Member] Duley Road, LLC. Variable lease costs Variable Lease, Cost Loss before income taxes and noncontrolling interests Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Stockholders’ deficit: Stockholders' Equity Attributable to Parent [Abstract] Prepaid expenses and other current assets (including amounts with related parties) Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current 23 Alaska, LLC 23 Alaska, LLC [Member] 23 Alaska, LLC Finance lease liabilities Finance Lease, Liability, Noncurrent Weighted Average Fair Value of Options Under Black-Scholes Option Pricing Model Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Prepaid services Prepaid Services Prepaid services. NantCell Nant Cell Inc [Member] NantCell, Inc. Operating lease liabilities Increase (Decrease) in Operating Lease Liability Comprehensive loss Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Related Party Transaction [Line Items] Related Party Transaction [Line Items] Award Type Award Type [Domain] Weighted-average period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Entity Registrant Name Entity Registrant Name Issuance of common stock under "at-the market" offering, net (in shares) Stock Issued During Period, Shares, New Issues Total Lease, Liability, To Be Paid [Abstract] Lease, Liability, To Be Paid Altor BioScience Corporation Altor BioScience Corporation [Member] Altor BioScience Corporation. 2024 Lease, Liability, To Be Paid, Year Two Lease, Liability, To Be Paid, Year Two Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Nant Capital, NantWorks, LLC, NantCancerStemCell, LLC, and NantMobile, LLC Nant Capital, NantWorks, LLC, NantCancerStemCell, LLC, and NantMobile, LLC [Member] Nant Capital, NantWorks, LLC, NantCancerStemCell, LLC, and NantMobile, LLC Research and Development Arrangement, Contract to Perform for Others, Type Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Entity Address, City or Town Entity Address, City or Town Net unrealized (losses) gains on available-for-sale securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax Total lease liabilities Lease, Liability Lease, Liability Leases [Abstract] Leases [Abstract] Operating expenses: Operating Expenses [Abstract] Mutual funds Mutual Fund [Member] Total stockholders’ deficit Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Principles of Consolidation Consolidation, Policy [Policy Text Block] Nant Capital Nant Capital 4 [Member] Nant Capital 4 Asset Class Asset Class [Domain] Income Tax [Line Items] Income Tax [Line Items] Income tax. Minimum Minimum Minimum [Member] Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Non-refundable upfront cash payments Collaboration Agreements, Nonrefundable Upfront Payment Nonrefundable upfront payment. Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Debt Issuance Costs, Net Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] 2023 Lease, Liability, To Be Paid, Year One Lease, Liability, To Be Paid, Year One Investment, Name [Axis] Investment, Name [Axis] Trading Symbol Trading Symbol Entity File Number Entity File Number Thereafter Lessee, Operating Lease, Liability, to be Paid, Due after Year Four Lessee operating lease liability payments due after year four. Treasury stock, common shares (in shares) Treasury Stock, Common, Shares September 2019 Lease September Twenty Nineteen Lease [Member] September twenty nineteen lease. Duley Road, LLC Duley Road [Member] Duley Road. 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Four Research and development (including amounts with related parties) Research and development expense Research and Development Expense Transaction Type Transaction Type [Axis] Nant Capital Nant Capital 3 [Member] Nant Capital 3 Leasehold improvements Leasehold Improvements, Gross Vested and exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Equipment Equipment [Member] Fair Value by Liability Class Fair Value by Liability Class [Domain] 557 Doug St, LLC Five Five Seven Doug St, LLC [Member] Five Five Seven Doug St, LLC Title of Individual Title of Individual [Axis] Granted (in units) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Outstanding RSUs RSUs Restricted Stock Units (RSUs) [Member] Number of square foot of facility leased Number Of Square Foot Of Facility Leased Number of square foot of facility leased. Risk free rate Measurement Input, Risk Free Interest Rate [Member] Due from related parties Total due from related parties Due from Related Parties, Current Dissenting shares to be released (in shares) Number of Dissenting Shares Number of Dissenting Shares Use of Estimates Use of Estimates, Policy [Policy Text Block] NCSC NCSC NCSC [Member] NCSC. Stock options Equity Option [Member] Revenue Revenues Increase in number of shares of common stock authorized for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized Percentage of sales agent commission Percentage Of Sales Agent Commission Percentage Of Sales Agent Commission Income Taxes Income Tax Disclosure [Text Block] More than 12 months, Estimated Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Amortization expense Amortization of Intangible Assets Accrued preclinical and clinical trial costs Accrued Preclinical And Clinical Trial Costs Accrued preclinical and clinical trial costs. Exercise price of warrants (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Interest Interest paid in cash Interest Paid, Excluding Capitalized Interest, Operating Activities Net loss per ImmunityBio common share – basic (in dollars per share) Earnings Per Share, Basic 2025 Lessee, Operating Lease, Liability, to be Paid, Year Three Construction in progress Construction in Progress, Gross Periodic license payments Collaboration Agreements, Periodic License Payments Collaboration Agreements, Periodic License Payments Counterparty Name [Domain] Counterparty Name [Domain] Research And Development Arrangements With Federal Government [Table] Research And Development Arrangements With Federal Government [Table] Research And Development Arrangements With Federal Government [Table] Total ImmunityBio stockholders’ deficit Stockholders' Equity Attributable to Parent Cash, cash equivalents, and restricted cash, beginning of period Cash, cash equivalents, and restricted cash, end of period Cash, cash equivalents, and restricted cash, end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Right-of-use assets obtained in exchange for finance lease liabilities Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Forfeited/canceled (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 Vesting [Domain] Vesting [Domain] Lease Contractual Term Lease Contractual Term [Axis] Transaction costs Asset Acquisition, Consideration Transferred, Transaction Cost Ownership Ownership [Domain] Binomial lattice model Valuation Technique, Binomial Lattice Model [Member] Valuation Technique, Binomial Lattice Model Entity Interactive Data Current Entity Interactive Data Current Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment [Table] Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Three Reimbursements Reimbursements [Member] Reimbursements. Litigation [Table] Litigation [Table] Litigation. Accumulated Deficit Retained Earnings [Member] Unrecognized compensation cost related to unvested stock options Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Other income, net Other Nonoperating Income (Expense) [Member] Total lease costs Lease, Cost Common Stock Common Stock [Member] Stock-Based Compensation Expenses Included on Operations Statement Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Comprehensive loss attributable to ImmunityBio common stockholders Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Shares issued pursuant to litigation settlement (in shares) Stock Issued During Period, Shares, Litigation Settlement Stock Issued During Period, Shares, Litigation Settlement Summary of Information Regarding Leases (Detail) Lease, Cost [Table Text Block] Common stock reserved for future grants (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Statement [Table] Statement [Table] Vested (in dollars 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 Accrued construction costs Accrued Construction Costs, Current Accrued Construction Costs, Current Promissory Notes Non-convertible Notes Promissory Notes Payable [Member] Promissory Notes Payable Estimated benefit at grant date fair value Share Based Compensation Arrangement By Share Based Payment Award Estimated Benefit At Grant Date Fair Value Share based compensation arrangement by share based payment award estimated benefit at grant date fair value. Optional extended lease term Lessee, Operating Lease, Renewal Term Marketable securities, noncurrent Marketable Securities, Noncurrent Document Quarterly Report Document Quarterly Report Furniture & fixtures Furniture and Fixtures [Member] Current assets: Assets, Current [Abstract] Operating lease liabilities, less current portion (including amounts with related parties) Operating lease liabilities Operating Lease, Liability, Noncurrent Statistical Measurement Statistical Measurement [Axis] Asset Acquisition [Domain] Asset Acquisition [Domain] Financial Statement Details Additional Financial Information Disclosure [Text Block] Payment for contingent consideration Payment for Contingent Consideration Liability, Financing Activities Related Party Transaction Related Party Transaction [Axis] Leasehold improvements Leasehold Improvements [Member] Accumulated deficit Accumulated deficit Retained Earnings (Accumulated Deficit) Other Other Operating Activities, Cash Flow Statement Total ImmunityBio Stockholders’ Deficit AOCI Including Portion Attributable to Noncontrolling Interest [Member] NantMobile NantMobile [Member] NantMobile. Purchases of marketable debt securities, available-for-sale Payments to Acquire Marketable Securities Total ImmunityBio Stockholders’ (Deficit) Equity Equity Components [Axis] Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Related-Party Debt Related-Party Agreements Related Party Transactions Disclosure [Text Block] Less than 12 months, Estimated Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Document Fiscal Year Focus Document Fiscal Year Focus Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Statement [Line Items] Statement [Line Items] Principal payments of finance leases Financing cash flow from finance leases Finance Lease, Principal Payments Accrued expenses and other liabilities Accounts Payable and Other Accrued Liabilities, Current Nonvested, beginning balance (in units) Nonvested, ending balance (in units) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unrealized gains (losses) from equity securities Debt and Equity Securities, Unrealized Gain (Loss) Total other expense, net Expenses incurred on behalf of the joint venture Nonoperating Income (Expense) Variable Rate [Domain] Variable Rate [Domain] Definite-lived intangible assets Finite-Lived Intangible Assets, Gross Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Selling, general and administrative (including amounts with related parties) Selling, general and administrative expense Selling, General and Administrative Expense Collaborative Arrangement and Arrangement Other than Collaborative, Fee Schedule [Axis] Collaborative Arrangement and Arrangement Other than Collaborative, Fee Schedule [Axis] Collaborative Arrangement and Arrangement Other than Collaborative, Fee Schedule Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Operating lease right-of-use assets, net (including amounts with related parties) Operating lease assets Operating Lease, Right-of-Use Asset Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Prepaid software license fees Prepaid Software License Fees Prepaid software license fees. Contingent Value Rights Payable, Sales Milestone Contingent Value Rights Obligation, Sales Milestone [Member] Contingent value rights obligation before December 31, 2026. Vested and exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Lease expense Operating Lease, Expense Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Cash payment to acquire assets Payments to Acquire Productive Assets Sponsored Research Agreement Sponsored Research Agreement [Member] Sponsored research agreement. Current Assets Current Assets [Member] Current assets. Document Transition Report Document Transition Report Local Phone Number Local Phone Number Performance based vesting Performance Based [Member] Performance Based Summary of Stock Option Activity and Related Information under Equity Plans Share-Based Payment Arrangement, Option, Activity [Table Text Block] Loss from operations Operating Income (Loss) Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Annual lease payment Lease, Operating Lease, Annual Lease Payment Lease, Operating Lease, Annual Lease Payment Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Advances to support operations Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Long-Lived Tangible Asset Long-Lived Tangible Asset [Axis] 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] Income tax expense Income tax expense Income Tax Expense (Benefit) Geographical Geographical [Domain] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] 2026 Lessee, Operating Lease, Liability, to be Paid, Year Four Income Statement [Abstract] Income Statement [Abstract] Option awards granted (in shares) Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Option to convert accrued and unpaid interest to shares of common stock (in dollars per share) Option to Convert Accrued and Unpaid Interest to Shares of Common Stock, Price Per Share Option to Convert Accrued and Unpaid Interest to Shares of Common Stock, Price Per Share Additional Paid-in Capital Additional Paid-in Capital [Member] Balance Sheet Location Balance Sheet Location [Domain] Document Fiscal Period Focus Document Fiscal Period Focus Aggregate intrinsic value of stock option exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Accrual for dissenting shares Accrued Payment For Dissenting Shares Accrued payment for dissenting shares. Weighted-average number of common shares used in computing net loss per share – diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Less: Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Expected term Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term State Of New York State Of New York [Member] State Of New York Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Domain] 420 Nash, LLC Four Two Zero Nash, LLC [Member] Four Two Zero Nash, LLC Schedule Of Available For Sale Securities [Line Items] Debt Securities, Available-for-Sale [Line Items] Summary of Available-for-Sale Marketable Debt Securities Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Investments in marketable equity securities with readily determinable fair values Marketable Securities Various Various [Member] Various. Common stock, $0.0001 par value; 900,000,000 and 500,000,000 shares authorized as of September 30, 2022 and December 31, 2021, respectively; 400,304,106 and 397,830,044 shares issued and outstanding as of September 30, 2022 and December 31, 2021, respectively; excluding treasury stock, 163,800 shares outstanding as of September 30, 2022 and December 31, 2021, respectively Common Stock, Value, Issued Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Business Acquisition, Acquiree Business Acquisition, Acquiree [Domain] Proceeds from reimbursement of construction expenses Proceeds For Leasehold Improvements, Government Partnership Proceeds For Leasehold Improvements, Government Partnership 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 Vesting of restricted stock units (RSUs) (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Prepayment of first month rent and security deposit Lessee, Operating Lease, Prepaid Expense Lessee, Operating Lease, Prepaid Expense Interest Payments Related Party Notes - Interest [Member] Related Party Notes - Interest Conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Net realized (losses) gains on investments Realized Investment Gains (Losses) Securities Excluded from the Computation of Potentially Dilutive Securities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Immuno-Oncology Clinic, Inc. Immuno-Oncology Clinic [Member] Immuno-Oncology Clinic. Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Gain on extinguishment of debt with related parties under common control Adjustments To Additional Paid In Capital, Gain (Loss) On Extinguishment Of Debt With Related Party Adjustments To Additional Paid In Capital, Gain (Loss) On Extinguishment Of Debt With Related Party Short-term lease costs Short-Term Lease, Cost Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Private Placement Private Placement [Member] Write off of remaining unamortized organized workforce intangible asset Impairment of Intangible Assets, Finite-Lived Related parties Increase Decrease In Due To Related Parties Current And Non Current Increase decrease in due to related parties current and non current. Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Accrued bonus Accrued Bonuses, Current Net loss attributable to noncontrolling interests, net of tax Net Income (Loss) Attributable to Noncontrolling Interest Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Nant Capital Nant Capital Two [Member] Nant capital two. Current liabilities: Liabilities, Current [Abstract] Proceeds from exercises of stock options Proceeds from stock options exercised Proceeds from Stock Options Exercised Common stock, shares issued (in shares) Common Stock, Shares, Issued Significant unobservable inputs, Level 3 valuations Debt Instrument, Measurement Input Merger exchange ratio Merger Exchange Ratio Merger exchange ratio. Milestone payment, payable amount Collaboration Agreements, Milestone Payment, Payable Amount Milestone payment amount. Expansion Premises Amendment For Expansion Of Premises Lease Term [Member] Amendment for expansion of premises, lease term. 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