Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Statistical Measurement Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Collaborative agreement upfront payments collected Collaborative Agreement Upfront Payments Collected Collaborative agreement upfront payments collected. Performance-Based Stock Options Performance-Based Stock Options [Member] Performance based stock options. Number of RSUs Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Segment Reporting [Abstract] Summary of Financial Assets Measured at Fair Value on a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Common stock, $0.001 par value, 250,000,000 shares authorized as of March 31, 2026 (unaudited) and December 31, 2025; 7,374,375 and 7,331,739 shares issued and outstanding as of March 31, 2026 (unaudited) and December 31, 2025, respectively Common Stock, Value, Issued Interest expense Interest Expense, Operating and Nonoperating Accrued employee-related costs Employee-related Liabilities, Current Others Other Prepaid Expense, Current Restatement Determination Date Restatement Determination Date Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Accrued preclinical and research costs Accrued Preclinical And Research Costs, Current Accrued preclinical and research costs, current. Asset impairments Asset Impairments [Member] Asset Impairment Member Measurement Frequency Measurement Frequency [Axis] Initial upfront payments total Proceeds from Sale of Productive Assets Amendment Flag Amendment Flag Restructuring and impairment charges Total Restructuring Costs and Asset Impairment Charges Current liabilities: Liabilities, Current [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Class Of Warrant Or Right [Table] Class of Warrant or Right [Table] Gain on sale of nonfinancial asset Gain (Loss) on Disposition of Other Assets Surrendered security deposit Operating Lease Liability, Surrendered Security Deposit Operating Lease Liability, Surrendered Security Deposit Leases [Abstract] Leases [Abstract] Organization And Description Of Business [Table] Organization And Description Of Business [Table] Organization and description of business. Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province Options granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent PEO Total Compensation Amount PEO Total Compensation Amount Accrued severance related costs Accrued Severance Related Costs, Current Accrued Severance Related Costs, Current Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Outstanding, beginning balance (in shares) Outstanding, ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Weighted-average shares used to compute net loss per common share, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Share-Based Payment Arrangement, Tranche One Share-Based Payment Arrangement, Tranche One [Member] Amortization of premiums and discounts on marketable securities Accretion (Amortization) of Discounts and Premiums, Investments Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Additional shares available for future issuance (in shares) Common Stock Additional Shares Authorized For Future Issuance Common Stock Additional Shares Authorized For Future Issuance Entity Address, City or Town Entity Address, City or Town 2022 Stock Inducement Plan Two Thousand Twenty Two Stock Incentive Plan [Member] Two thousand twenty two stock incentive plan member. Number of shares, granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Document Information [Line Items] Document Information [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Additional milestone payments on achievement (up to) Additional Payments Receivable On Milestone Achievements Additional Payments Receivable On Milestone Achievements RSUs vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Options to purchase of common stock outstanding (in shares) Options To Purchase Of Common Stock Outstanding Options to purchase of common stock outstanding. Subsequent Event Type [Axis] Subsequent Event Type [Axis] Termination benefit, health insurance premium worth Termination Payout, Health Insurance Premium Worth Termination Payout, Health Insurance Premium Worth Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Internal costs Internal Costs [Abstract] Internal Costs Total other comprehensive income (loss), net of tax Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Summary of Maturities of Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Document Period End Date Document Period End Date Changes in operating assets and liabilities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding 2018 Equity Incentive Plan Two Thousand Eighteen Equity Incentive Plan [Member] Two thousand eighteen equity incentive plan. Stockholders' Equity Equity [Text Block] Deposits for operating lease Other Assets Deposits For Operating Lease, Current Other Assets Deposits For Operating Lease, Current Security Exchange Name Security Exchange Name Summary of Financial Information for Segment Segment Reporting, Reconciliation of Other Item by Segment to Consolidated [Table Text Block] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Maximum number of shares authorized available for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Operating lease liabilities, current Operating lease liabilities, current Operating Lease, Liability, Current Summary of Property and Equipment, Net Property, Plant, and Equipment [Table Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Net Loss Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings Per Share [Abstract] Earnings Per Share [Abstract] Maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Number of contingent value rights (in shares) Business Combination Number of Contingent Value Right Business Combination Number of Contingent Value Right Geographical Geographical [Domain] Assets held for sale Asset, Held-for-Sale, Not Part of Disposal Group, Current Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Unrecognized stock-based compensation cost Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Amortization of debt discount and issuance costs and other non-cash interest Amortization of Debt Issuance Costs and Discounts Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted-average shares used to compute net loss per common share, diluted (in shares) Weighted-average shares of common stock outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Axis] RSUs vesting tranches (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Lease payment to landlord Cash paid for operating lease liabilities Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] Aggregate intrinsic value, options exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Severance and related benefit costs Severance Costs Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1 Fair Value, Inputs, Level 1 [Member] Number of shares will increase automatically through every year on specified date Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Increase Automatically Through Every Year On Specified Date Share based compensation arrangement by share based payment award number of shares increase automatically through every year on specified date. Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Lease liability to be paid Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Outstanding, beginning balance (in dollars per share) Outstanding, 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 All Executive Categories All Executive Categories [Member] Collaboration Revenue Collaboration Revenue [Member] Collaboration revenue. Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Preferred Share Purchase Right Preferred Share Purchase Right [Member] Preferred Share Purchase Right Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Class Of Warrant Or Right [Line Items] Class of Warrant or Right [Line Items] Depreciation expense Depreciation Vesting [Domain] Vesting [Domain] Plan Name Plan Name [Domain] Antidilutive Securities Antidilutive Securities [Axis] Outstanding, beginning balance (in dollars per share) Outstanding, ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Operating lease right-of-use asset Operating Lease, Right-of-Use Asset Summary of Calculation of Basic and Diluted Net Loss per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Risk-free interest rate, Maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Royalty Royalty [Member] Segment Reporting Segment Reporting [Text Block] Minimum Minimum [Member] Issuance of common stock under employee stock incentive plans (in shares) Issuance Of Shares Under Incentive And Share Based Compensation Plans, Shares Issuance of shares under incentive and share based compensation plans. Payments of dividends of common stock Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement Location Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Weighted average remaining contractual term, (Years) Outstanding balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Unbilled receivable from Everest, current (Note 8) Unbilled Receivables, Current Maximum number of shares issued upon exercise of incentive stock options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Summary of RSU Activity Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Exercise Price Award Exercise Price Restructuring Cost [Table] Restructuring Cost [Table] Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] South San Francisco, California South San Francisco California [Member] South san Francisco, California. Repayment of loan principal Repayments of Long-Term Debt Summary of Restructuring and Impairment Charges Restructuring and Related Costs [Table Text Block] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Beginning balance Ending balance Restructuring Reserve Equity Component Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Adoption Date Trading Arrangement Adoption Date Total stockholders' equity Beginning balance Ending balance Equity, Attributable to Parent Restructuring Type [Axis] Restructuring Type [Axis] Percentage of annual increase in number of common stock shares Share Based Compensation Arrangement By Share Based Payment Award Annual Increase In Number Of Common Stock Shares Percent Share based compensation arrangement by share based payment award annual increase in number of common stock shares percent. Insurance Prepaid Insurance Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Operating lease liability Total lease liabilities Total operating lease liabilities Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] Stock options shares outstanding (in shares) Outstanding, beginning balance (in shares) Outstanding, ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Series A Junior Participating Preferred Stock Series A Junior Participating Preferred Stock [Member] Series A Junior Participating Preferred Stock. Prepaid expenses and other current assets Total prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Type of Restructuring [Domain] Type of Restructuring [Domain] Business Combination [Domain] Business Combination [Domain] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Anti-dilutive securities excluded from computation of diluted net loss per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of operating segments Number of Operating Segments Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Summary of Anti-dilutive Outstanding Shares of Common Stock Equivalents Excluded from Computation of Diluted Net Loss per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Entity Central Index Key Entity Central Index Key Less: accumulated depreciation and amortization Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Additional paid-in capital Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Business Combination [Axis] Business Combination [Axis] Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Gain on sale of nonfinancial asset Gain on sale of nonfinancial asset Gain (Loss) On Sale Of Nonfinancial Assets Gain (Loss) On Sale Of Nonfinancial Assets Aurinia Pharma U.S., Inc. Aurinia Pharma U.S., Inc. [Member] Aurinia Pharma U.S., Inc. Income Statement [Abstract] Income Statement [Abstract] Stockholders' equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Operating expenses: Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Summary of Fair Value of Employee Stock Options Granted is Calculated Using Black Scholes Option Pricing Model with Range of Assumptions Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Number of Options Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] City Area Code City Area Code ACCUMULATED OTHER COMPREHENSIVE LOSS AOCI Attributable to Parent [Member] Document Information [Table] Document Information [Table] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Passive Institutional Investor Passive Institutional Investor [Member] Passive Institutional Investor Name Forgone Recovery, Individual Name Estimated weighted average amortization period (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Entity [Domain] Entity [Domain] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Shares available for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Stock-based compensation expense Employee Benefits and Share-Based Compensation Interest expense Interest Expense, Nonoperating Summary of Stock-Based Compensation Expense Recognized Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Proceeds from issuance of common stock under employee stock incentive plans Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Excluding Option Exercised Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Other assets Increase (Decrease) in Other Operating Assets PEO PEO [Member] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Total stock-based compensation expense Share-Based Payment Arrangement, Expense Increase in number of shares reserved for issuance as percentage of total number of shares of capital stock outstanding on last date of preceding calendar year Increase In Number Of Shares Reserved For Issuance As Percentage Of Total Number Of Shares Of Capital Stock Outstanding On Last Date Of Preceding Calendar Year Increase in number of shares reserved for issuance as percentage of total number of shares of capital stock outstanding on last date of preceding calendar year. Preferred stock, convertible, conversion ratio Preferred Stock, Convertible, Conversion Ratio Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Option exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Subsequent Event Type [Domain] Subsequent Event Type [Domain] Operating lease liabilities, noncurrent Operating Lease, Liability, Noncurrent ACCUMULATED DEFICIT Retained Earnings [Member] Total operating expenses Operating Expenses U.S. Treasury money market funds Money Market Funds [Member] Impairment charge Operating Lease, Impairment Loss Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Options cancelled/forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Unrealized loss on marketable securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Everest License Agreement Everest License Agreement [Member] Everest License Agreement. Net loss per common share, diluted (in dollars per share) Net loss per share, diluted (in dollars per share) Earnings Per Share, Diluted 2015 Equity Incentive Plan Two Thousand Fifteen Equity Incentive Plan [Member] Two thousand fifteen equity incentive plan. Entity Current Reporting Status Entity Current Reporting Status Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Expected volatility, Maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Total Shareholder Return Amount Total Shareholder Return Amount Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Ownership [Domain] Ownership [Domain] Research and development Research and Development Expense Adjustments to reconcile net loss to net cash used in operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 2018 Plan Two Thousand Eighteen Plan [Member] Two thousand eighteen plan . Organization And Description Of Business [Line Items] Organization And Description Of Business [Line Items] Organization and description of business. Share-Based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property and equipment, net Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Summary of Accrual Activity and Payments Relating to Restructuring and Impairment Charge Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Tang Capital Partners, LP Tang Capital Partners, LP [Member] Tang Capital Partners, LP Options cancelled/forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Risk-free interest rate, Minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Segment Reporting [Table] Segment Reporting [Table] Shares granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Computer equipment Computer Equipment [Member] Stock Options Additional Disclosures Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Summary of Lease Liabilities Lease, Cost [Table Text Block] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Loss from operations Loss from operations Operating Income (Loss) Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Modified exercise price (in dollars per share) Share Based Payment Arrangement Option Exercise Price Range Outstanding Modified Exercise Price Modified exercise price with respect to all outstanding stock options which are in the customized range of exercise prices. Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Summary of Activity under Stock Option Plans and Related Information Share-Based Payment Arrangement, Option, Activity [Table Text Block] Weighted Average Exercise Price Weighted Average Grant-Date Fair Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Loss on fixed asset write-off Asset impairments Asset, Impairment Loss Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Organization and Description of the Business Business Description and Basis of Presentation [Text Block] Incremental cost Share-Based Payment Arrangement, Plan Modification, Incremental Cost KZR-261 KZR-261 [Member] KZR-261 Reportable Segment Reportable Segment [Member] Reportable Segment Equity Components Equity Components [Axis] Product and Service [Domain] Product and Service [Domain] Entity Interactive Data Current Entity Interactive Data Current Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Proceeds from sale of nonfinancial asset Proceed From Sale Of Nonfinancial Assets Proceed From Sale Of Nonfinancial Assets Entity Small Business Entity Small Business Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Property Plant And Equipment [Line Items] Property, Plant, and Equipment [Line Items] Subsequent Events [Abstract] Subsequent Events [Abstract] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Options granted expiry period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Document Type Document Type Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Total accrued liabilities Accrued Liabilities, Current Fair Value as of Grant Date Award Grant Date Fair Value Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Gain on disposition of fixed assets Gain (Loss) on Disposition of Assets Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Preferred dividend (in shares) Preferred Stock Dividends, Shares Stockholder Rights Plan Stockholder Rights Plan [Member] Stockholder rights plan. Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Collaboration revenue Revenues Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Total property and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Accounts payable, accrued and other current liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Compensation expense related to the unvested option Share Based Compensation Expense Plan Modification Unamortized Incremental Compensation Cost of Unvested Option Shares Share based compensation expense plan modification unamortized incremental compensation cost of unvested option shares. Option grant vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Purchase price (in dollars per share) Purchase Price Of Shares Upon Rights Exercise Purchase price of shares upon rights exercise. Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] All Award Types All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Less than 12 months Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Fair Value Measurements Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Aggregate intrinsic value, options vested and exercisable Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Exercisable Intrinsic Value Sharebased compensation arrangement by sharebased payment award options vested and exercisable intrinsic value. Supplemental disclosures Supplemental Cash Flow Information [Abstract] Expected term (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Ownership percentage Subsidiary, Ownership Percentage, Noncontrolling Owner PEO Name PEO Name Vested and exercisable (in shares) Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Exercisable Number Share based compensation arrangement by share based payment award options vested and exercisable number. Geographical Geographical [Axis] Accrued and other current liabilities Accrued Liabilities And Other Liabilities Current Accrued liabilities and other liabilities, current. 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Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Cash payments made Payments for Restructuring Option exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cash and cash equivalents at the beginning of period Cash and cash equivalents at the end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Weighted average remaining contractual term, (Years) options vested and exercisable Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Exercisable Weighted Average Remaining Contractual Term Sharebased compensation arrangement by sharebased payment award options vested and exercisable weighted average remaining contractual term. 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Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]