Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Convertible Senior Notes Convertible Senior Notes [Member] Convertible Senior Notes Statistical Measurement [Domain] Statistical Measurement [Domain] Costs paid or otherwise settled Payments For Restructuring And Noncash Activity Payments For Restructuring And Noncash Activity Security systems Security Systems [Member] Security Systems Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Net loss – diluted Net Income (Loss) Available to Common Stockholders, Diluted Carrying Value Reported Value Measurement [Member] Document Fiscal Year Focus Document Fiscal Year Focus Weighted average interest rate (in percent) Debt, Weighted Average Interest Rate Adjustment to Compensation, Amount Adjustment to Compensation Amount Non-recourse asset-backed debt Lines of Credit, Fair Value Disclosure Number of RSUs Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Segment Reporting [Abstract] Common stock, $0.0001 par value; 3,000,000,000 shares authorized; 968,626,958 and 957,245,487 shares issued, respectively; 968,626,958 and 957,245,487 shares outstanding, respectively Common Stock, Value, Issued Depreciation and amortization  Depreciation, Amortization and Accretion, Net Schedule of Credit Facilities and Long Term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Requisite service period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period Issue price percentage Debt Instrument, Issue Price, Percentage Of Face Amount Debt Instrument, Issue Price, Percentage Of Face Amount Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Inventory valuation adjustment Inventory Write-down Term Debt Facility 2021-S1 Term Debt Facility 2021 S-1 [Member] Term Debt Facility 2021 S-1 Warrants to purchase shares (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] CURRENT LIABILITIES: Liabilities, Current [Abstract] Downward price adjustment Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Revolving Facility 2018-2 Revolving Facility 2018-2 [Member] Revolving Facility 2018-2 Class of Warrant or Right [Table] Class of Warrant or Right [Table] Senior Convertible Notes 2030 Convertible Senior Notes 2030 [Member] Convertible Senior Notes 2030 Ownership percentage, joint venture Ownership Percentage, Joint Venture Ownership Percentage, Joint Venture RELATED PARTIES Related Party Transactions Disclosure [Text Block] Consolidated Entities [Domain] Consolidated Entities [Domain] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Property, Plant, and Equipment [Abstract] Entity Address, State or Province Entity Address, State or Province Basis of Presentation and Principles of Consolidation Basis of Presentation and Principles of Consolidation [Policy Text Block] Basis of Presentation and Principles of Consolidation PEO Total Compensation Amount PEO Total Compensation Amount Currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Cash and Cash Equivalents [Abstract] Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Basic (in shares) Weighted average shares outstanding - 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basic Net Income (Loss) Available to Common Stockholders, Basic Proceeds from issuance of common stock for ESPP Proceeds from Stock Plans Asset-backed Senior Revolving Credit Facilities Asset-Backed Senior Revolving Credit Facility [Member] Asset-Backed Senior Revolving Credit Facility Level 2 Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Market Condition RSUs Market Condition RSUs [Member] Market Condition RSUs Borrowing Capacity Borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Outstanding, current Long-Term Debt, Current Maturities Dividends, preferred stock Dividends, Preferred Stock Subsequent Event Type [Axis] Subsequent Event Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Stock-based compensation expense capitalized for internally developed software Share-Based Payment Arrangement, Amount Capitalized Impairment of Long-Lived Assets Long-Lived Asset, Excluding Intangible Asset and Goodwill, Impairment and Disposal [Policy Text Block] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Reportable Segment’s Expenses and Net Loss Segment Reporting [Table Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Exercise price of warrants (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Net Carrying Amount Long-Term Debt Proceeds from debt, net of issuance costs Proceeds from Debt, Net of Issuance Costs PROPERTY AND EQUIPMENT Property, Plant, and Equipment [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 (used in) 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] Zillow Zillow, Inc. [Member] Zillow, Inc. Debt aggregate principal amount Debt Instrument, Face Amount Basic and diluted net loss per share: Earnings Per Share, Basic [Abstract] WARRANTS Equity [Text Block] Security Exchange Name Security Exchange Name Term Debt Instrument, Term Effective Interest Rate Debt Instrument, Interest Rate, Effective Percentage Sale of real estate inventory expected period Debt Instrument Repayments, Sale Of Real Estate Inventory Expected Period Debt Instrument Repayments, Sale Of Real Estate Inventory Expected Period Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Restricted cash Restricted Cash [Member] Restricted Cash Lease liabilities – current portion Operating Lease, Liability, Current Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Interest payable Interest Payable, Current Schedule of Property, Plant and Equipment Property, Plant, and Equipment [Table Text Block] NET LOSS PER 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Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Entity Central Index Key Entity Central Index Key Issuance Costs Debt Issuance Costs, Noncurrent, Net Accumulated depreciation and amortization Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Other Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item SHAREHOLDERS’ EQUITY: 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) provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Issuance of common stock under employee stock purchase plan, net of shares withheld for participant taxes (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Document Transition Report Document Transition Report Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Series Z Warrants, each whole warrant exercisable to purchase one share of common stock at an exercise price of $17.00 per warrant Series Z Warrants, each whole warrant exercisable to purchase one share of common stock at an exercise price of $17.00 per warrant [Member] Series Z Warrants, each whole warrant exercisable to purchase one share of common stock at an exercise price of $17.00 per warrant OPERATING EXPENSES: Less: Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Number of Options (in thousands) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] City Area Code City Area Code Origination of mortgage loans held for sale Payment for Origination and Purchase, Loan, Held-for-Sale 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] Amortization of right of use asset Operating Lease, Right-of-Use Asset, Periodic Reduction Name Forgone Recovery, Individual Name Unamortized stock-based compensation 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] Weighted- Average Grant-Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Total Equity Method Investments And Equity Securities Without Readily Determinable Fair Value Equity Method Investments And Equity Securities Without Readily Determinable Fair Value Statement [Line Items] Statement [Line Items] TOTAL ASSETS Assets Assets Outstanding amount, current Long-Term Debt, Gross, Current Long-Term Debt, Gross, Current Convertible Debt Convertible Debt [Member] Convertible senior notes – current portion Convertible Debt, Current INTEREST EXPENSE Interest expense Interest Expense, Nonoperating Schedule of Stock-Based Compensation Expense in the Statements of Operations Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Non-marketable equity securities Equity Securities without Readily Determinable Fair Value, Amount SHARE-BASED AWARDS Share-Based Payment Arrangement [Text Block] Issuance of common stock under employee stock purchase plan, net of shares withheld for participant taxes Stock Issued During Period, Value, Employee Stock Purchase Plan Proceeds from issuance of convertible senior notes, net of discount Proceeds from Convertible Debt Other assets Increase (Decrease) in Other Operating Assets Accounts payable and other accrued liabilities Accounts Payable and Other Accrued Liabilities, Current PEO PEO [Member] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Statement of Other Comprehensive Income [Abstract] Expired (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Excluding Market Condition RSUs Excluding Market Condition RSUs [Member] Excluding Market Condition RSUs Share-based compensation expense Stock-based compensation expense Stock-based compensation Share-Based Payment Arrangement, Expense Measurement Basis [Axis] Measurement Basis [Axis] OTHER LIABILITIES Other Liabilities, Noncurrent GOODWILL Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Goodwill additions Goodwill, Acquired During Period Exercise of stock options (in shares) Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period 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 Subsequent Event Type [Domain] Subsequent Event Type [Domain] Accumulated Deficit Retained Earnings [Member] LEASE LIABILITIES – Net of current portion Operating Lease, Liability, Noncurrent Total operating expenses Operating Expenses Revolving Credit Facility Revolving Credit Facility [Member] Money market funds Money Market Funds [Member] Series A Preferred Stock Series A Preferred Stock [Member] Forfeited (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 Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Mainstay Labs, Inc. Mainstay Labs, Inc. [Member] Mainstay Labs, Inc. Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock outstanding (in dollars per share) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Diluted (in dollars per share) Diluted net loss per share (in dollars per share) Earnings Per Share, Diluted 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 Work in progress Inventory, Real Estate, Construction in Process Total Shareholder Return Amount Total Shareholder Return Amount Asset-backed Senior Term Debt Facilities Asset-Backed Senior Term Debt Facility [Member] Asset-Backed Senior Term Debt Facility Amortization expense of intangible assets Intangible Asset, Finite-Lived, Amortization Expense Proceeds from non-recourse asset-backed debt Proceeds from Long-Term Lines of Credit Technology and development Research and Development Expense Adjustments to reconcile net loss to cash, cash equivalents, and restricted cash (used in) provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Share-Based Payment Arrangement [Abstract] CASH FLOWS FROM FINANCING ACTIVITIES: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] REVENUE Revenue Revenue from Contract with Customer, Excluding Assessed Tax PROPERTY AND EQUIPMENT – Net Property and equipment – net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Non-recourse asset-backed debt – current portion Line of Credit, Current Outstanding amount, current Long Term Debt, Gross, Current And Short Term Debt Long Term Debt, Gross, Current And Short Term Debt Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] REAL ESTATE INVENTORY Inventory Disclosure [Text Block] Mainstay National Title LLC Mainstay National Title LLC [Member] Mainstay National Title LLC Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Warrants issued (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted GOODWILL AND INTANGIBLE ASSETS Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Proceeds from sale and principal collections of mortgage loans held for sale Proceeds from Sale and Collection, Loan, Held-for-Sale Fair Value Estimate of Fair Value Measurement [Member] Series K Warrants, each whole warrant exercisable to purchase one share of common stock at an exercise price of $9.00 per warrant Series K Warrants, each whole warrant exercisable to purchase one share of common stock at an exercise price of $9.00 per warrant [Member] Series K Warrants, each whole warrant exercisable to purchase one share of common stock at an exercise price of $9.00 per warrant Total fair value Cash, Cash Equivalents And Marketable Securities Cash, Cash Equivalents And Marketable Securities Interest payable Increase (Decrease) in Interest Payable, Net Purchase of non-marketable equity securities Payment for investment Payment For Equity Securities Without Readily Determinable Fair Value Payment For Equity Securities Without Readily Determinable Fair Value Schedule of Equity Method Investments and Non-Marketable Equity Securities Schedule Of Non-Marketable Equity Securities And Equity Method Investments [Table Text Block] Schedule Of Non-Marketable Equity Securities And Equity Method Investments Carrying Value Long Term Debt, Current Maturities And Short Term Debt Long Term Debt, Current Maturities And Short Term Debt Segment Reporting [Table] Segment Reporting [Table] Related Party Transaction [Table] Related Party Transaction [Table] Computers Computer Equipment [Member] Title and Position [Axis] Title and Position [Axis] Escrow receivable Escrow Deposit Weighted- Average Remaining Contractual Term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Cash Cash [Member] Schedule of Available-For-Sale Securities Reconciliation Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Other current assets Other current assets Other Assets, Current Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Office equipment Office Equipment [Member] LOSS FROM OPERATIONS Operating Income (Loss) Current Fiscal Year End Date Current Fiscal Year End Date Proceeds from issuance of debt Proceeds from Issuance of Debt Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Escrow receivable Increase (Decrease) In Escrow Receivable Increase (Decrease) In Escrow Receivable 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] Fixed operating expense Fixed Operating Expense Fixed Operating Expense Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Principal value of 2030 Notes issued in Debt Exchange Principal value of 2030 notes issued in debt exchange Debt Instrument, Issued, Principal Schedule of the Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Weighted- Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] 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 issued (in dollars per share) Common Stock, Shares, Issued Measure: Measure [Axis] Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Grant date fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Revolving Facility 2018-3 Revolving Facility 2018-3 [Member] Revolving Facility 2018-3 Under contract for sale Inventory, Real Estate, In Resale Contract Inventory, Real Estate, In Resale Contract Equity Components [Axis] Equity Components [Axis] Related Party Related Party [Member] Entity Interactive Data Current Entity Interactive Data Current Weighted-average shares outstanding: Weighted-Average Shares Outstanding [Abstract] Weighted-Average Shares Outstanding Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business COMPREHENSIVE LOSS Comprehensive Income (Loss), Net of Tax, Attributable to Parent Advertising and other marketing expense Marketing and Advertising Expense Termination Date Trading Arrangement Termination Date Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Subsequent Events [Abstract] DESCRIPTION OF BUSINESS AND ACCOUNTING POLICIES Business Description and Accounting Policies [Text Block] 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] Cash award Share-Based Compensation Arrangement By Share-Based Payment Award, Make-Whole Award, Cash Share-Based Compensation Arrangement By Share-Based Payment Award, Make-Whole Award, Cash OTHER ASSETS Other Assets, Noncurrent Document Type Document Type (LOSS) GAIN ON EXTINGUISHMENT OF DEBT Loss (gain) on extinguishment of debt Gain on debt extinguishment Gain (Loss) on Extinguishment of Debt Fair Value as of Grant Date Award Grant Date Fair Value Repurchase price Debt Instrument, Redemption Price, Percentage Exercisable, aggregate intrinsic value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Cash and Cash Equivalents Cash and Cash Equivalents [Member] Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Series A Warrants, each whole warrant exercisable to purchase one share of common stock at an exercise price of $13.00 per warrant Series A Warrants, each whole warrant exercisable to purchase one share of common stock at an exercise price of $13.00 per warrant [Member] Series A Warrants, each whole warrant exercisable to purchase one share of common stock at an exercise price of $13.00 per warrant Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name LOSS BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Schedule of Fair Value Disclosure of Asset and Liability Not Measured at Fair Value Fair Value Disclosure of Asset and Liability Not Measured at Fair Value [Table Text Block] COMMITMENTS AND CONTINGENCIES (See Note 15) Commitments and Contingencies Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Property, plant and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Accounts payable and other accrued 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] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Counterparty Name [Axis] Counterparty Name [Axis] Expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period Furniture and fixtures Furniture and Fixtures [Member] LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Weighted-average remaining contractual term (in years), exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted-Average Remaining Contractual Term Award Type [Domain] Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] FAIR VALUE DISCLOSURES Fair Value Disclosures [Text Block] Schedule of Variable Interest Entities [Table] Variable Interest Entity [Table] RECONCILIATION TO CONDENSED CONSOLIDATED BALANCE SHEETS: Supplemental Cash Flow Information [Abstract] Term Debt Facility 2021-S2 Term Debt Facility 2021-S2 [Member] Term Debt Facility 2021-S2 PEO Name PEO Name Threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Real estate inventory, net Total real estate inventory Real estate inventory, net Inventory, Real Estate Leasehold improvements Leasehold Improvements [Member] Restricted cash Restricted Cash Other Segment Reporting, Other Segment Item, Amount Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Other Other Assets Concentrations of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Lease termination expense Business Exit Costs Total Convertible Senior Notes interest expense Interest Expense, Debt Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price CASH, CASH EQUIVALENTS, AND RESTRICTED CASH – Beginning of period CASH, CASH EQUIVALENTS, AND RESTRICTED CASH – End of period Cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Cash and Cash Equivalents Marketable Securities, Cash And Cash Equivalents Marketable Securities, Cash And Cash Equivalents Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Restricted cash Restricted cash Restricted Cash and Cash Equivalent, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Number of employees, workforce reduction (approximately) Restructuring and Related Cost, Number of Positions Eliminated Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Non-Recourse Asset Backed Debt Non-Recourse Asset Backed Debt [Member] Non-Recourse Asset Backed Debt Employee Stock Purchase Plan Employee Stock [Member] Investment, Name [Domain] Investment, Name [Domain] Schedule of Real Estate Inventory Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in dollars per share) Basic net loss per share (in dollars per share) Earnings Per Share, Basic Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Net Carrying Amount Long-Term Debt, Excluding Current Maturities COST OF REVENUE Cost of revenue Cost of Revenue Award Type [Axis] Award Type [Axis] Payment of loan origination fees and debt issuance costs Payments of Financing Costs Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accumulated deficit Retained Earnings (Accumulated Deficit) Restructuring and Related Activities [Abstract] Debt instrument, convertible, threshold trading days Debt Instrument, Convertible, Threshold Trading Days Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Employee Severance Employee Severance [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Shares issued during period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Cover [Abstract] Schedule of Impairment Loss Recognized Long-Lived Asset, Held and Used, Impairment [Table Text Block] Contractual interest Interest Expense, Debt, Excluding Amortization Revolving Facility 2019-1 Revolving Facility 2019-1 [Member] Revolving Facility 2019-1 Equity Awards Adjustments Equity Awards Adjustments [Member] Schedule of Convertible Senior Notes Convertible Debt [Table Text Block] TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity Valuation adjustments Inventory, Real Estate, Valuation Adjustment (Decrease) Increase Inventory, Real Estate, Valuation Adjustment (Decrease) Increase Real estate inventory Increase (Decrease) in Loan, Mortgage, Held-for-Sale Options Share-Based Payment Arrangement, Option [Member] Term Debt Facility 2022-M1 Term Debt Facility 2022-M1 [Member] Term Debt Facility 2022-M1 Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Restructuring Additions charged to expense Restructuring Charges Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital OTHER INCOME – Net Other Nonoperating Income (Expense) Asset-Backed Senior Facilities Asset-Backed Senior Facilities [Member] Asset-Backed Senior Facilities Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Aggregate intrinsic values Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period General and administrative General and Administrative Expense Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Revolving Facility 2019-2 Revolving Facility 2019-2 [Member] Revolving Facility 2019-2 Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Adjustment to Compensation: Adjustment to Compensation [Axis] Class of Stock [Domain] Class of Stock [Domain] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION – Cash paid during the period for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Principal value of 2026 Notes extinguished in Debt Exchange Debt principal exchanged Debt Instrument, Exchanged, Principal Debt Instrument, Exchanged, Principal Credit Facility [Axis] Credit Facility [Axis] RESTRUCTURING Restructuring and Related Activities Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Inventory valuation adjustments Inventory Adjustments Name Measure Name Revolving Facility 2019-3 Revolving Facility 2019-3 [Member] Revolving Facility 2019-3 INCOME TAXES Income Tax Disclosure [Text Block] Schedule of Cash and Cash Equivalents [Table] Cash and Cash Equivalent [Table] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Preferred stock as consideration receivables Preferred Stock Received For Services, Value Preferred Stock Received For Services, Value Debt Instrument [Line Items] Debt Instrument [Line Items] Senior Convertible Notes 2026 Convertible Senior Notes 2026 [Member] Convertible Senior Notes 2026 Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Consideration paid for acquisition Business Combination, Consideration Transferred Outstanding amount, noncurrent Long-Term Debt, Gross, Noncurrent Long-Term Debt, Gross, Noncurrent Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Goodwill, impairment loss Goodwill, Impairment Loss Name Trading Arrangement, Individual Name Issuance of common stock for settlement of RSUs, net of shares withheld for participant taxes Stock Issued During Period, Value, Settlement Of Restricted Stock Units, Net Of Shares Withheld For Taxes Stock Issued During Period, Value, Settlement Of Restricted Stock Units, Net Of Shares Withheld For Taxes Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Asset-backed Mezzanine Term Debt Facilities Mezzanine Term Debt Facilities [Member] Mezzanine Term Debt Facilities Company Selected Measure Amount Company Selected Measure Amount Changes in fair value of equity securities Equity Securities, FV-NI, Unrealized Gain (Loss) Depreciation and amortization expense Depreciation, Depletion and Amortization Entity Address, Address Line Two Entity Address, Address Line Two CURRENT ASSETS: Assets, Current [Abstract] Fully committed borrowing capacity, maximum Line Of Credit Facility, Fully Committed Maximum Borrowing Capacity Line Of Credit Facility, Fully Committed Maximum Borrowing Capacity Non-PEO NEO Non-PEO NEO [Member] Number of homes under contract to be purchased Recorded Unconditional Purchase Obligation, Minimum Quantity Required Entity Address, Address Line One Entity Address, Address Line One 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 INCOME TAX EXPENSE Income tax provision Income Tax Expense (Benefit) Marketing Warrants Marketing Warrants [Member] Marketing Warrants Award Timing Method Award Timing Method [Text Block] NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation CASH, CASH EQUIVALENTS, AND INVESTMENTS Cash, Cash Equivalent, and Marketable Security [Text Block] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] NET LOSS NET LOSS Net loss Net loss Net Income (Loss) Attributable to Parent Holding Costs Holding Costs Holding Costs Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Issuance of common stock upon exercise of warrants (in shares) Stock Issued During Period, Shares, Exercise Of Warrants Stock Issued During Period, Shares, Exercise Of Warrants Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Reportable Segment Reportable Segment [Member] Reportable Segment Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Term Debt Facility 2022-S1 Term Debt Facility 2022-S1 [Member] Term Debt Facility 2022-S1 Interest income Interest Income Nonoperating Interest Income Nonoperating Lease liabilities Increase (Decrease) In Lease Liabilities Increase (Decrease) In Lease Liabilities Debt instrument, convertible, threshold consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Software implementation costs Software Implementation Costs [Member] Software Implementation Costs Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]