United Auto Credit 2021-1-F United Auto Credit Two Thousand Twenty One One F [Member] United auto credit two thousand twenty one one F. Wholesale vehicle Wholesale Vehicle [Member] Wholesale vehicle. Entity Address, City or Town Entity Address, City or Town Debt instrument covenant to maintain minimum percentage of credit line in cash and cash equivalents. Debt Instrument Covenant To Maintain Minimum Percentage Of Credit Line In Cash And Cash Equivalents Debt instrument covenant to maintain minimum percentage of credit line in cash and cash equivalents Aggregate fair value of finance receivables reported at fair value Receivables, Fair Value Disclosure Receivables, Fair Value Disclosure, Total 2022 Vehicle Floorplan Facility Two Thousand Twenty Two Vehicle Floorplan Facility [Member] Two Thousand Twenty Two Vehicle Floorplan Facility. Fair Value Disclosures [Abstract] Fair Value of Assets Acquired Fair value of unvested stock options assumed for acquisition of business Earnings Per Share [Abstract] Level 1 Fair Value, Inputs, Level 1 [Member] Fair Value NotesReceivableNetFairValue Notes receivable net fair value Schedule of Accrued Expenses Schedule of Accrued Liabilities [Table Text Block] Acquired in business combination Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Other Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset, Other Fair value measurement with unobservable inputs reconciliation recurring basis asset, other. Financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Aggregate principal amount Initial Principal Debt Instrument Initial Principal Amount Debt instrument initial principal amount. Other Increase (Decrease) in Other Operating Assets and Liabilities, Net Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total Convertible Senior Notes, Carrying value Convertible Notes Payable Convertible Notes Payable, Total Long-term Line of Credit, Total Outstanding Balance as of June 30, 2022 (in thousands) Warehouse credit facilities of consolidated VIEs Outstanding borrowings Revenue, practical expedient, incremental cost of obtaining contract Revenue, Practical Expedient, Incremental Cost of Obtaining Contract [true false] Amendment Flag Amendment Flag Accrued property and equipment expenditures Capital Expenditures Incurred but Not yet Paid Number of shares authorized for issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Common stock shares cancelled to satisfy working capital adjustment related to the CarStory acquisition (in shares) Stock Cancelled Shares To Satisfy Working Capital Adjustment Related To Acquisition Stock cancelled shares to satisfy working capital adjustment related to acquisition. Subsequent Event Type [Domain] Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization United Auto Credit 2021-1-D United Auto Credit Two Thousand Twenty One One D [Member] United auto credit two thousand twenty one one D. Restricted Cash Collateralized Finance Entities, Restricted Cash [Member] Collateralized finance entities, restricted cash. Goodwill Goodwill Goodwill, Total Beginning Balance Ending Balance Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Intangible Assets, Net Schedule of Estimated Useful Lives of Intangible Assets Document Quarterly Report Document Quarterly Report Schedule of Long-Term Debt Instruments [Table] Variable Interest Entity [Line Items] Debt Instrument aggregate principal amount exercise in overallotment option granted to initial purchasers. Debt Instrument Aggregate Principal Amount Exercise In Overallotment Option Granted To Initial Purchasers Aggregate principal amount exercise in overallotment option granted to initial purchasers 2025 Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Three Cash and Cash Equivalents Cash and Cash Equivalents [Domain] Certificates Certificates [Member] Certificates. Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Costs associated with planned facility closures. Costs Associated with Planned Facility Closures Costs associated with planned facility closures Statement [Table] Statement [Table] Operating lease liabilities, excluding current portion Operating Lease, Liability, Noncurrent Chief Executive Officer [Member] CEO Other Segments [Member] All Other Number of operating segments Number of Operating Segments LIBOR London Interbank Offered Rate (LIBOR) [Member] Other Long-term Liabilities Other Noncurrent Liabilities [Member] Preferred Stock, outstanding Preferred Stock, Shares Outstanding Preferred Stock, Shares Outstanding, Beginning Balance Preferred Stock, Shares Outstanding, Ending Balance Business Acquisition Business Acquisition [Axis] Asset Pledged as Collateral without Right Asset Pledged as Collateral without Right [Member] Restructuring Charges Total Restructuring and Related Charges Fair value of common stock (per share) Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Fair Value Of Common Stock Share based compensation arrangement by share based payment award fair value assumptions fair value of common stock. Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Conversion price Fair value of beneficial interests received in securitization transactions Fair Value of Beneficial Interests Received in Securitization Transactions Fair value of beneficial interests received in securitization transactions. Deferred revenue Increase (Decrease) in Deferred Revenue Line Of Credit Facility [Line Items] Line of Credit Facility [Line Items] Ally Bank and Ally Financial Ally Bank And Ally Financial [Member] Ally Bank and Ally Financial. Carrying value of finance receivables Carrying Value Of Finance Receivables Carrying value of finance receivables. Other Current Liabilities Other Current Liabilities [Table Text Block] Business Combination Disclosure [Text Block] Acquisition Risk retention rules percentage Reinsurance, Excess Retention, Percentage Product and Service Product and Service [Axis] Shipping and Handling Shipping and Handling [Member] Accrued compensation and benefits Employee-related Liabilities, Current Employee-related Liabilities, Current, Total Vehicle related expenses Accrued Vehicle Related Expenses Current Accrued vehicle related expenses current. Stock Options Share-Based Payment Arrangement, Option [Member] Liabilities and Equity Total liabilities and stockholders' equity Beneficial Interests in Securitizations Beneficial Interests in Securitizations [Member] Beneficial interests in securitizations. Plan Name [Domain] Total other current liabilities Other current liabilities Other Liabilities, Current Line of Credit Facility, Lender Line of Credit Facility, Lender [Domain] Valuation allowance for finance receivables classified as held for sale Financing Receivable, Held for Sale, Valuation Allowances Financing receivable, held for sale, valuation allowances. Deferred tax liability Deferred tax liability Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Pledged Status [Domain] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Income Statement [Abstract] Acquisition-related Costs Acquisition-related Costs [Member] Share-Based Payment Arrangement, Tranche Three [Member] Operating Segments [Member] Reportable Segments Sale of Stock Sale of Stock [Domain] Total current liabilities Liabilities, Current Period of LIBOR measurement Period Of L I B O R Measurement Period of LIBOR measurement. Business Combinations Policy [Policy Text Block] Business Combinations Cash acquired from acquisition Cash Acquired from Acquisition Business Acquisition, Acquiree Business Acquisition, Acquiree [Domain] Fair Value, Recurring Fair Value, Recurring [Member] Gross interest expense Interest expense Interest Expense Interest Expense, Total Accounts receivable, net of allowance Accounts Receivable, Allowance for Credit Loss Accounts Receivable, Allowance for Credit Loss, Beginning Balance Accounts Receivable, Allowance for Credit Loss, Ending Balance Share-Based Payment Arrangement, Tranche Two [Member] Trade Name Trade Names [Member] Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Preferred stock, authorized Preferred Stock, Shares Authorized Other Assets Other Noncurrent Assets [Member] Securitization debt noncurrent Fair Value Estimated fair value of notes Line of credit facility, description Line of Credit Facility, Description 90 Days or More Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Variable Rate [Axis] Entity Small Business Entity Small Business United Auto Credit 2021-1 United Auto Credit Two Thousand Twenty One One [Member] United auto credit two thousand twenty one one. Number of reportable segments Number of Reportable Segments Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Restructuring and Related Activities [Abstract] Restructuring Reserve, Total Restructuring Reserve Balance as of December 31, 2021 Balance as of June 30, 2022 Nonrecurring Adjustment [Axis] Collateralized finance receivable Collateralized Finance Receivables Collateralized finance receivables. Debt Instrument, Redemption, Period [Domain] Total current assets Assets, Current Property Plant And Equipment [Line Items] Property, Plant and Equipment [Line Items] Trademarks and Trade names Trademarks and Trade Names [Member] Other liabilities Increase (Decrease) in Other Operating Liabilities Increase (Decrease) in Other Operating Liabilities, Total Variable Interest Entities and Securitizations Variable Interest Entity Disclosure [Text Block] Weighted-average number of shares outstanding used to compute net loss per share attributable to common stockholders, basic Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic, Total Losses on finance receivables and securitization debt, net Loss On Finance Receivables And Securitization Debt Net Loss on finance receivables and securitization debt net. City Area Code City Area Code Management Team Management [Member] Key Management Schedule of Debt Instruments Schedule of Debt [Table Text Block] Carrying Value Variable Interest Entity Carrying Value Variable interest entity carrying value. Finance receivables, held for sale Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Finance Receivables Held For Sale Business combination recognized identifiable assets acquired and liabilities assumed finance receivables held for sale. Description of Business and Basis of Presentation Business Description and Basis of Presentation [Text Block] Forfeited shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Finance receivables held for sale, Fair Value Finance Receivables Held for Sale Fair Value Finance receivables held for sale fair value. Share-Based Payment Arrangement [Abstract] Total liabilities Liabilities Document Period End Date Document Period End Date Restricted Stock Awards Restricted Stock [Member] Summary of Reportable Segments Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Asset-backed Securities Asset-Backed Securities [Member] United Auto Credit 2020-1-F United Auto Credit Two Thousand Twenty One F [Member] United auto credit two thousand twenty one F. Schedule of Finite-Lived Intangible Assets [Table] Warehouse credit facilities, current. Warehouse Credit Facilities, Current Warehouse credit facilities Warehouse credit facilities of consolidated VIEs Transfers into level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Debt Conversion, Converted Instrument, Shares Issued Debt conversion, for each principal amount conversion to shares Liquidity Liquidity Policy [Text Block] Liquidity. Share-Based Payment Arrangement, Tranche One [Member] Accrued marketing expenses Accrued Marketing Costs, Current Statistical Measurement Statistical Measurement [Axis] Trademarks [Member] Trademarks Fair value of unvested stock options assumed in acquisition of business Adjustments to additional paid in capital fair value of unvested stock options assumed for acquisition. Adjustments To Additional Paid In Capital Fair Value Of Unvested Stock Options Assumed For Acquisition Other Assets, Current Other assets Business acquisition lock up period. Business Acquisition Lock Up Period Business acquisition lock up period Finance Receivables of CFEs Finance Receivables of Consolidated CFEs Finance Receivables of Consolidated Collateralized Finance Entities [Member] Finance receivables of consolidated collateralized finance entities. Restructuring Costs, Total Restructuring Costs Restructuring Costs Logistics fleet Vehicles [Member] Related Party Related Party [Axis] Total assets Assets Assets Convertible senior notes. Convertible Senior Notes [Member] Convertible Senior Notes Debt instrument, covenant description Debt Instrument, Covenant Description United Auto Credit Corporation [Member] United Auto Credit Corporation. UACC Other Loss (Income), Net Other Nonoperating Income (Expense) [Member] Internal-use Software Software Development [Member] Proceeds from Issuance of Senior Long-Term Debt Net proceeds from offering, after deducting commissions paid to initial purchasers and debt issuance costs paid to third-parties Proceeds from issuance of convertible senior notes Securitization debt, net of current portion Long term debt, net of current portion Long term debt, net of current portion Long-Term Debt, Excluding Current Maturities Net loss per share attributable to common stockholders, diluted Earnings Per Share, Diluted Earnings Per Share, Diluted, Total Net proceeds from securitization Proceeds from Accounts Receivable Securitization Summary of Calculation of Diluted Shares Outstanding Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Securitization Vehicles Securitization Vehicles member Securitization Vehicles member Pledged Status [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Document Fiscal Period Focus Document Fiscal Period Focus Cost of sales Cost of Goods and Services Sold Cost of Goods and Services Sold, Total Write-offs Fair Value Measurement with Unobservable Inputs Reconciliation Recurring Basis Asset, Write-offs Fair value measurement with unobservable inputs reconciliation recurring basis asset, write-offs. Accounts receivable Increase (Decrease) in Accounts Receivable Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total Other Other Capitalized Property Plant and Equipment [Member] Interest income Gross interest income Interest income Investment Income, Interest Securitization transaction Accounts Receivable From Securitization Transactions Net Cash Provided by (Used in) Financing Activities Net cash (used in) provided by financing activities Statement of Financial Position [Abstract] Financial Liabilities Gain (Loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Entity File Number Securities Act File Number Scenario [Domain] Ecommerce E Commerce [Member] Ecommerce. Other Other Revenue [Member] Other revenue. Statement of Cash Flows [Abstract] Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Summary of Final Identifiable Intangible Assets Acquired and their Estimated Weighted Average Useful Life Sublease Income SubleaseIncome Credit facility, outstanding borrowings Line of credit facility, current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Percentage of inflation reduction act corporate alternative Percentage of Inflation Reduction Act Corporate Alternative Debt of securitized VIEs Debt Of Securitized Variable Interest Entities [Member] Debt of securitized variable interest entities. Statistical Measurement Statistical Measurement [Domain] Statement of Stockholders' Equity [Abstract] Debt Instrument, Date of First Required Payment Long-term debt, beginning date of payment Sale of Stock Sale of Stock [Axis] Class of Stock Class of Stock [Domain] Finance receivables at fair value (including finance receivables of consolidated VIEs of $135.8 million and $0 million, respectively) Finance receivables at fair value, noncurrent Finance Receivables at Fair Value Noncurrent Finance receivables at fair value noncurrent. Repayments of warehouse credit facilities Repayments of Warehouse Credit Facilities of Consolidated Variable Interest Entities Repayments of warehouse credit facilities of consolidated variable interest entities. Redemption price Principal repayment under secured financing agreements Repayments of Secured Debt Stockholders' Equity Note [Abstract] Subsequent Events [Abstract] Financial Instruments and Fair Value Measurements Fair Value Disclosures [Text Block] Summary of Unconsolidated Variable Interest Entities Summary of Unconsolidated Variable Interest Entities [Table Text Block] Summary of unconsolidated variable interest entities. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Total Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Current liabilities Current liabilities Proceeds from exercise of stock options Proceeds from Stock Options Exercised Long term debt, net of current portion (including securitization debt of consolidated VIEs of $40.8 million and $0 million at fair value, respectively) Long-Term Debt and Lease Obligation Long-term Debt and Lease Obligation, Total Vehicles Vehicles Vehicles. Long-Term Debt, Type [Axis] Wholesale Wholesale [Member] Wholesale. Deferred tax Deferred Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit), Total Debt Instrument, Redemption, Period One [Member] During any Fiscal Quarter Commencing After Fiscal Quarter Ending on September 30, 2021 Schedule of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Other financing activities Proceeds from (Payments for) Other Financing Activities Revenue Recognition Revenue from Contract with Customer [Text Block] Concentration of Credit Risk and Significant Customers Concentration Risk, Credit Risk, Policy [Policy Text Block] Proceeds from sale of finance receivables held for sale, net Proceeds from sale of finance receivables held for sale, net Proceeds from Sale of Loans Held-for-sale Proceeds from Sale of Loans Held-for-sale, Total Vast Holdings, Inc. Vast Holdings Inc [Member] Vast Holdings, Inc. (“d/b/a CarStory”) Line of credit facility, maximum borrowing capacity Aggregate Borrowings Limit (in thousands) Increased borrowing capacity Deferred revenue Contract with Customer, Liability, Current For remainder of 2022 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Share conversion ratio. Share Conversion Ratio Share conversion ratio Warehouse Credit Facilities of Consolidated VIEs Warehouse Credit Facilities of Consolidated Variable Interest Entities Text Block Warehouse credit facilities of consolidated variable interest entities text block. Net assets acquired Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Credit Balance Agreements Credit Balance Agreements [Member] Credit balance agreements. Transaction costs Business Acquisition, Transaction Costs Convertible Senior Notes, Fair value Convertible Debt, Fair Value Disclosures Credit Facility Credit Facility [Domain] Originations of finance receivables held for sale Organization of finance receivables held for sale Payments for Origination and Purchases of Loans Held-for-sale Payments for Origination and Purchases of Loans Held-for-sale, Total Subsequent Events [Text Block] Subsequent Events Weighted-average number of shares outstanding used to compute net loss per share attributable to common stockholders, diluted Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Accounts Receivable from Securitization Securitization transaction Finite-Lived Intangible Assets, Major Class Name [Domain] Credit Facility Credit Facility [Axis] Net loss Business Acquisition, Pro Forma Net Income (Loss) Implementation costs capitalized accumulated amortization. Implementation Costs Capitalized Accumulated Amortization Implementation costs capitalized, accumulated amortization Aggregate fair value of debt of securitized VIEs Financial Liabilities Fair Value Disclosure Financial Liabilities Fair Value Disclosure, Total Commercial Paper [Member] Commercial Paper Current Fiscal Year End Date Current Fiscal Year End Date Liability Class Liability Class [Axis] Financial Instruments Financial Instruments [Domain] Cash, cash equivalents and restricted cash at the end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Net (decrease) increase in cash, cash equivalents and restricted cash Other assets Other Assets, Noncurrent Other Assets, Noncurrent, Total Entity Address, Address Line One Entity Address, Address Line One Property and Equipment, Net Property, Plant and Equipment [Member] Schedule of Reconciliation of Financial Assets Measured at Fair Value on a Recurring Basis Using Level 3 Inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Finite-Lived Intangible Assets by Major Class [Axis] Acquisition-related cost Proforma Adjustments Related to Non Recurring Acquisition Related Cost Proforma adjustments related to non recurring acquisition related cost. Proceeds from vehicle floorplan Proceeds from Lines of Credit Proceeds from Lines of Credit, Total Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Non-recurring tax adjustment (benefit) Non-recurring Tax Adjustment (Benefit) Non-recurring tax adjustment (benefit). Line of Credit Facility [Abstract] Restricted cash Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Restricted cash Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Restricted cash Provision for income taxes Income Tax Expense (Benefit) Provision (benefit) for income taxes Decrease of valuation allowance result from acquisition Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Income Taxes Income Tax Disclosure [Text Block] Vesting [Axis] Preferred stock, issued Preferred Stock, Shares Issued, Total Issuance of shares Balance Sheet Location Balance Sheet Location [Domain] Other Other Accrued Liabilities, Current Debt Instrument, Redemption, Period Two [Member] During Five Consecutive Business Day Period After any Ten Consecutive Trading Day Period Financial Assets Gain (Loss) Total Gain (Loss) Net realized and unrealized gains (losses) included in income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Payments to Acquire Property, Plant, and Equipment, Total Income Tax Disclosure [Abstract] Line Of Credit Facility [Table] Line of Credit Facility [Table] Summary of Fair Value of Financial Instruments Not Carried at Fair Value Fair Value Measurements, Nonrecurring [Table Text Block] Nonrecurring Adjustment [Domain] Common stock, issued Issuance of common stock, net of offering costs (in shares) Stock issued during period shares Zero point seven five percent unsecured convertible senior notes due two thousand twenty six. Zero Point Seven Five Percent Unsecured Convertible Senior Notes Due Two Thousand Twenty Six [Member] 0.75% Unsecured Convertible Senior Notes Due 2026 Number of reporting units Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Lenders Lender [Member] Lender. Goodwill and Intangible Assets Disclosure [Abstract] Non-Employee Share-Based Payments Share-Based Payment Arrangement [Policy Text Block] Reconciliation of revenue from segments to consolidated. Reconciliation Of Revenue From Segments To Consolidated [Abstract] Reconciliation to consolidated total revenue Accrued Liabilities and Other Liabilities [Abstract] Residual Interest, 2022-1 and 2022-2 Securitization Residual Interest Two Thousand And Twenty Two One and Two Thousand And Twenty Two Two Securitization [Member] Residual Interest 2022-1 and 2022-2 Securitization. Other Other Current Other current. Loss from operations Operating Income (Loss) Interest Rate Debt Instrument, Interest Rate, Stated Percentage Debt instrument interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Company's common stock shares reserved for issuance Related Party Related Party [Domain] Principal payments received on finance receivables held for sale Increase Decrease in Principal Payments Received on Finance Receivables Held for Sale Increase (decrease) in principal payments received on finance receivables held for sale. Additional paid-in-capital Additional Paid in Capital, Common Stock Additional Paid in Capital, Common Stock, Beginning Balance Additional Paid in Capital, Common Stock, Ending Balance United Auto Credit 2020-1-D United Auto Credit Two Thousand Twenty One D [Member] United auto credit two thousand twenty one D. Beneficial interests in securitizations Beneficial Interests in Securitizations Beneficial interests in securitizations. Payments to Acquire Businesses, Net of Cash Acquired, Total Payments to Acquire Businesses, Net of Cash Acquired Acquisition of business, net of cash acquired Acquisition of business, net of cash acquired Scenario [Axis] Business combination unvested stock options assumed fair value. Business Combination Unvested Stock Options Assumed Fair Value Fair value of unvested stock options assumed Accrued professional services Accrued Professional Fees, Current Common stock, voting rights Common Stock, Voting Rights Number of senior secured warehouse credit facilities Number of Senior Secured Warehouse Credit Facilities Number of senior secured warehouse credit facilities. Aggregate Principal Balance Variable Interest Entity Amortized Cost Aggregate Principal Balance Variable interest entity amortized cost aggregate principal balance. Entity Filer Category Entity Filer Category Severance Costs Severance and termination benefits Realized gains on securitization transaction Gain (Loss) on Securitization of Financial Assets, beneficial interests Gain (Loss) on Securitization of Financial Assets Restructuring Plan [Domain] Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other comprehensive income (loss) Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Total Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Property and equipment and other assets Shipping and Handling Shipping And Handling Costs Policy [Text Block] Disclosure of accounting policy for shipping and handling costs. Fair Value by Liability Class Fair Value by Liability Class [Domain] Entity Current Reporting Status Entity Current Reporting Status Implementation costs capitalized. Implementation Costs Capitalized Implementation costs capitalized Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Asset Class Asset Class [Domain] Total inventory Inventory Inventory, Net Share based compensation arrangement by share based payment award vesting description. Share-Based Compensation Arrangement by Share-Based Payment Award, Vesting Description Vesting description Line Of Credit Line of Credit [Member] Purchased Technology Purchased technology Member Purchased technology Member Prime Rate Prime Rate [Member] Asset Impairment Charges, Total Asset Impairment Charges Impairment charges Inventory Inventory Disclosure [Text Block] Other Assets Other Assets [Member] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Business Combinations [Abstract] Total intangible assets Finite-Lived Intangible Assets, Net, Beginning Balance Finite-Lived Intangible Assets, Net, Ending Balance Finite-Lived Intangible Assets, Net Intangible assets, net Carrying Value Balance Balance Stockholders' Equity Attributable to Parent Total stockholders' equity Percentage of owned finance subsidiary Percentage of Trust Issuer Owned Finance Subsidiary Percentage of trust issuer owned finance subsidiary. Asset Class Asset Class [Axis] Expected payments, 2024 Long-Term Debt, Maturity, Year Two Entity Tax Identification Number Entity Tax Identification Number Income Statement Location Income Statement Location [Axis] Forfeited shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Common stock, $0.001 par value; 500,000,000 shares authorized as of September 30, 2022 and December 31, 2021; 138,154,063 and 137,092,891 shares issued and outstanding as of September 30, 2022 and December 31, 2021, respectively Common Stock, Value, Issued Common Stock, Value, Issued, Total Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Ending Balance Consolidation Items [Axis] Accumulated deficit Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Total Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Ending Balance Inventory valuation reserves Inventory Valuation Reserves Inventory Valuation Reserves, Beginning Balance Inventory Valuation Reserves, Ending Balance Equipment Equipment [Member] Equity Components Equity Components [Axis] Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net, Total Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Unamortized debt discount and debt issuance costs Consolidated Entities [Domain] Legal Fees Legal fees Customer Relationships [Member] Customer Relationships Disaggregation Of Revenue [Table] Disaggregation of Revenue [Table] Total net loss included in other income Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings Fair Value, Ending Balance Fair Value, Beginning Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Business Acquisition, Date of Acquisition Agreement Business acquisition, date of acquisition Entity Emerging Growth Company Entity Emerging Growth Company Schedule of Business Acquisitions, by Acquisition [Table] Interest expense Interest Expense, Debt Interest Expense, Debt, Total Sales Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Retail vehicle, net Retail Vehicle [Member] Retail vehicle. Goodwill [Line Items] Senior Notes, Noncurrent Net carrying value of debt Convertible senior notes Principal payments received on beneficial interests Principal Payments Received on Beneficial Interests Principal payments received on beneficial interests. Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Expected term (in years) Repayments of convertible senior notes Repayments of convertible senior notes Repayments of Convertible Debt Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Depreciation, Depletion and Amortization, Nonproduction, Total Document Transition Report Document Transition Report Other net losses due to changes in fair value Other Net Losses Due To Changes In Fair Value Other net losses due to changes in fair value. Total financial assets Financial assets Total financial assets Expected payments, 2025 Long-Term Debt, Maturity, Year Three 2020 Incentive Award Plan Two Thousand Twenty Incentive Award Plan [Member] Two thousand twenty incentive award plan. Accrued Expenses and Other Current Liabilities Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Depreciation and amortization Depreciation, Depletion and Amortization Depreciation, Depletion and Amortization, Total Additional availability line of credit facility any four months during the maturity period Additional Available Line Of Credit Facility Additional available line of credit facility. Schedule Of Segment Reporting Information By Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Issuance of restricted stock purchase agreement Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Accounts receivable, net of allowance of $26.7 million and $8.9 million, respectively Accounts Receivable, after Allowance for Credit Loss, Current Accounts Receivable, after Allowance for Credit Loss, Current, Total Percentage of notes and residual certificates sold Percentage of Retained Notes and Residual Certificates Sold Percentage of retained notes and residual certificates sold. Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Cash Deposits Cash Deposits [Member] Cash deposits. Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table] Amortization of debt issuance costs Amortization of Debt Issuance Costs Net income (loss) Net loss Net loss Net loss Severance and other personnel restructuring. Severance and Other Personnel Restructuring [Member] Severance And Other Personnel Restructuring Debt Instrument, Convertible, Threshold Trading Days Trading days Shipping and handling expenses Shipping And Handling Expenses Shipping and handling expenses. Operating lease liabilities, current Operating Lease, Liability, Current Finance Receivables at Fair Value Finance Receivables at Fair Value Including Interest Receivables [Member] Finance receivables at fair value including interest receivables. Summary of Gains or Losses Recorded Related to Eligible Financial Instruments Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table Text Block] Other liabilities Other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Finance Receivables Financing Receivable [Policy Text Block] Schedule 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] Additional Paid-in Capital Additional Paid-in Capital [Member] Number of warehouse credit facilities Number of Warehouse Credit Facilities Number of warehouse credit facilities. Collaborative Arrangement and Arrangement Other than Collaborative Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Cash and cash equivalents Sales taxes Taxes Payable, Current Taxes Payable, Current, Total Issuance of common stock for acquisition of business. Issuance Of Common Stock For Acquisition Of Business Issuance of common stock for CarStory acquisition RA Agreement R A Agreement [Member] RA Agreement. Maturity Date Line of Credit Facility, Expiration Date 2023 Finite-Lived Intangible Assets, Amortization Expense, Next Rolling 12 Months Schedule of Terms of the Warehouse Credit Facilities Schedule of Line of Credit Facilities [Table Text Block] Securitization debt current Debt Securities, Available-for-Sale, Allowance for Credit Loss, Current Restructuring Plan [Axis] United Auto Credit 2021-1-A United Auto Credit Two Thousand Twenty One One A [Member] United auto credit two thousand twenty one one A. 2026 Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four Entity Registrant Name Entity Registrant Name Advertising expense Advertising Expense Total financial liabilities Financial liabilities Total financial liabilities Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash and Cash Equivalents, at Carrying Value, Total Cash and Cash Equivalents, at Carrying Value, Beginning Balance Cash and Cash Equivalents, at Carrying Value, Ending Balance Net Loss Per Share Earnings Per Share [Text Block] Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of Weighted Average Assumptions Used in Calculation of Fair Value Using Black-Scholes Option Pricing Model Class of Stock Class of Stock [Axis] Final Scheduled Payment Date Debt Instrument, Maturity Date Long-term debt, maturity date Revenues Revenues, Total Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Share-based Payment Arrangement, Noncash Expense, Total Recognized a gain on sale Recognized a gain on sale Securitization or Asset-Backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale, Gain (Loss) on Sale Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Finance receivables at fair value (including finance receivables of consolidated VIEs of $10.9 million and $0 million, respectively) Finance receivables at fair value, current Finance Receivables at Fair Value Current Finance receivables at fair value current. Award Type Award Type [Domain] Statement [Line Items] Statement [Line Items] Principal payments received on finance receivables at fair value Principal Payments Received on Finance Receivables at Fair Value Principal Payments Received on Finance Receivables at Fair Value Accounting Policies [Line Items] Accounting Policy [Line Items] Accounting policy. Consolidated CFEs Consolidated Collateralized Financing Entity [Policy Text Block] Consolidated Collateralized Financing Entity. Amortization of cloud computing assets Amortization Of Cloud Computing Assets Amortization of cloud computing assets Share based compensation arrangement by share based payment award options fair value per share. Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Fair Value Per Share Fair value per share TDA Texas Direct Auto [Member] Texas direct auto. Title of 12(b) Security Title of 12(b) Security Finite-Lived Intangible Assets, Gross, Total Finite-Lived Intangible Assets, Gross Gross Carrying Value Reserve for chargebacks Reserve For Chargebacks Reserve for chargebacks. Accounts payable Increase (Decrease) in Accounts Payable Increase (Decrease) in Accounts Payable, Total Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Common Stock Common Stock [Member] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Equity Component Equity Component [Domain] Common stock shares cancelled to satisfy working capital adjustment related to the CarStory acquisition Stock Cancelled Value To Satisfy Working Capital Adjustment Related To Acquisition Stock cancelled value to satisfy working capital adjustment related to acquisition Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax, Total Revenues from external customers Loss before provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Address, State or Province Entity Address, State or Province Unpaid principal balance of receivables within finance receivables that are reported at fair value and are on nonaccrual status Unpaid Principal Balance of Receivables within Finance Receivables Reported at Fair Value on Nonaccrual Status Unpaid principal balance of receivables within finance receivables reported at fair value on nonaccrual status. Net decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Document Type Document Type Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Summary of Pro Forma Information Business Acquisition, Pro Forma Information [Table Text Block] Business acquisition discounted marketability percentage. Business Acquisition Discounted Marketability Percentage Business acquisition discounted marketability percentage Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Redemption percentage of principal amount Entity Shell Company Entity Shell Company Facility Two Facility Two [Member] Facility Two. Inventory Increase (Decrease) in Inventories Increase (Decrease) in Inventories, Total Stock-based compensation expense Share-Based Payment Arrangement, Expense Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] 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] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] 2024 Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two Contractual Interest Rate Debt Instrument, Interest Rate During Period Residual Interest, 2022-1 Securitization Residual Interest, Two Thousand and Twenty Two-One Securitization [Member] Residual interest, two thousand and twenty two-one securitization. Security Exchange Name Security Exchange Name Revenue from Contract with Customer [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Net proceeds from sale of transaction, cash Net Proceeds from Sale of Transaction Cash Net proceeds from sale of transaction, cash. Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Aggregate unpaid principal balance included within finance receivables that are reported at fair value Unpaid Principal Balance of Receivables Fair Value Disclosure Unpaid principal balance of receivables fair value disclosure. Unrecognized stock-based compensation weighted-average period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Fair Value, by Balance Sheet Grouping [Table] Debt Instrument, Interest Rate, Effective Percentage Effective interest rate Finance receivables held for sale, Fair Value Loans Held-for-sale, Fair Value Disclosure Payments to Acquire Businesses, Gross Cash Cash purchase price Paydowns Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Commitments and Contingencies Disclosure [Abstract] Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items] Restricted Stock Units Restricted Stock Units (RSUs) [Member] RSUs Finance receivables held for sale, Carrying value Finance Receivables Held For Sale Carrying Value Finance receivables held for sale carrying value. Principles of Consolidation Consolidation, Policy [Policy Text Block] Retail Financing Retail Financing [Member] Retail Financing Total revenue Business Acquisition, Pro Forma Revenue Total assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Diverse Bank Group Diverse Bank Group [Member] Diverse bank group. Warrants Warrant [Member] Accounting Standards Issued But Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Common stock, shares outstanding Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding, Beginning Balance Common Stock, Shares, Outstanding, Ending Balance Business Acquisition [Line Items] Gain on debt extinguishment Gain on debt extinguishment Gain (Loss) on Extinguishment of Debt Gain (Loss) on Extinguishment of Debt, Total Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Accounts receivable, prepaid expenses and other current assets Debt Disclosure [Text Block] Vehicle Floorplan Facility Level 2 Fair Value, Inputs, Level 2 [Member] Investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Variable Interest Entity Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Estimated Amortization Expense for Intangible Assets Finance receivables at fair value Business Combination, Acquired Receivable, Fair Value Commitments and contingencies (Note 13) Commitments and Contingencies Common stock, shares issued Common Stock, Shares, Issued Common Stock, Shares, Issued, Total Variable Rate [Domain] Minimum Minimum [Member] Minimum [Member] Residual Interest, 2022-2 Securitization Residual Interest Two Thousand And Twenty Two Two Securitization Member Residual Interest Two Thousand And Twenty Two Two Securitization. Debt Instrument, Frequency of Periodic Payment Long-term debt, frequency of periodic payment Restructuring and Related Costs [Table Text Block] Components of Restructuring Charges Debt Instrument, Redemption, Period Three [Member] Company May Redeem On or after July 6, 2024 Variable Interest Entity, Measure of Activity [Abstract] Interest credits earned Interest Income, Domestic Deposits Interest Income, Domestic Deposits, Total Segments Segments [Domain] Restricted cash (including restricted cash of consolidated VIEs of $19.5 million and $0 million, respectively) Restricted cash Cash deposits included in restricted cash Restricted cash Restricted Cash as of June 30, 2022 (in thousands) Repayments of vehicle floorplan Repayments of Lines of Credit Other Restructuring Costs Other costs Total accrued expenses Accrued expenses Accrued Liabilities, Current Rated Notes Rated Notes [Member] Rated notes. Debt Instrument Debt Instrument [Axis] Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Listing price of share. Listing Price of Share Listing price of share Entity Address, Address Line Two Entity Address, Address Line Two Other Intangible Assets [Member] Other Segments Segments [Axis] Percentage of servicing fees earned on outstanding principal balance of finance receivable Percentage of Servicing Fees Earned on Outstanding Principal Balance of Finance Receivable Percentage of servicing fees earned on outstanding principal balance of finance receivable. Cash and Cash Equivalents Cash and Cash Equivalents [Axis] Revenue: Revenues [Abstract] Product, net Product [Member] Amortization of Intangible Assets Amortization of Intangible Assets, Total Amortization expense for intangible assets Amortization expense Award Type Award Type [Axis] Other Noncash Income (Expense) Other Noncash Income (Expense), Total Other, net Subsequent Events Subsequent Event [Member] Unrecognized stock-based compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total Total Fair value of consideration transferred Business acquisition, purchase price Business acquisition, purchase price Other income, net Other loss (income), net Other Nonoperating Income (Expense) Other Nonoperating Income (Expense), Total Current portion of securitization debt of consolidated VIEs Current portion of securitization debt Current portion of securitization debt of consolidated VIEs at fair value Long-term Debt, Current Maturities, Total Depreciation and amortization expense included within Cost of sales Cost, Depreciation and Amortization Cost, Depreciation and Amortization, Total Restructuring Type [Axis] Transfer within Level 3 categories Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease), Total Payments for origination of finance receivables at fair value. Payments for Origination of Finance Receivables at Fair Value Originations of finance receivables at fair value Debt instrument covenant to maintain principal balance outstanding Debt Instrument Covenant To Maintain Principal Balance Outstanding Debt instrument covenant to maintain principal balance outstanding. Entity Central Index Key Entity Central Index Key Advertising Advertising Cost [Policy Text Block] Segment assets Segment Assets Segment assets. Payments for Restructuring Cash payments Cash payments Finite-Lived Intangible Assets [Line Items] Finite Lived Intangible Assets [Line Items] United Auto Credit 2020-1-C United Auto Credit Two Thousand Twenty One C [Member] United Auto Credit 2020-1-C. Proceeds from warehouse credit facilities Proceeds From Warehouse Credit Facilities of Consolidated Variable Interest Entities Proceeds from warehouse credit facilities of consolidated variable interest entities. Accounting Policies [Abstract] Debt Instrument, Redemption, Period [Axis] Disaggregation Of Revenue [Line Items] Disaggregation of Revenue [Line Items] Summary of Total Assets and Total Liabilities Associated With Variable Interests in Consolidated VIEs Schedule of Variable Interest Entities [Table Text Block] Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment [Table] Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility Measurement Frequency Measurement Frequency [Axis] Consolidation Items [Domain] Shares available for future issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Stock-based Compensation Share-Based Payment Arrangement [Text Block] Securitization Debt of Consolidated VIEs Securitization Debt of Consolidated Variable Interest Entities [Member] Securitization debt of consolidated variable interest entities. Amount of upfront shares was written off. Amount of Upfront Shares was Written Off Amount of upfront shares was written off Redeemable Convertible Preferred Stock Redeemable Convertible Preferred Stock [Member] Finance Receivables at Fair Value Finance Receivables at Fair Value [Member] Finance receivables at fair value. Organization, Consolidation and Presentation of Financial Statements [Abstract] Prepaid Expenses and Other Current Assets Prepaid Expenses and Other Current Assets [Member] Deferred issuance costs Debt Issuance Costs, Net Debt Issuance Costs, Net, Total Scenario Forecast Forecast [Member] Weighted average interest rate Short-Term Debt, Weighted Average Interest Rate, at Point in Time Debt Instrument, Convertible, Conversion Price Initial conversion price per share Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Accumulated Deficit Retained Earnings [Member] Business acquisition, number of shares issued Business Acquisition, Equity Interest Issued or Issuable, Number of Shares United Auto Credit 2020-1-E United Auto Credit Two Thousand Twenty One E [Member] United auto credit two thousand twenty one E. Money Market Funds Money Market Funds [Member] Segment Reporting [Abstract] Finance Receivables Held for Sale, Net Financing Receivable, Held-for-sale [Policy Text Block] Finance Finance [Member] Finance Effective tax rate Effective Income Tax Rate Reconciliation, Percent Effective Income Tax Rate Reconciliation, Percent, Total Asset Pledged as Collateral with Right Asset Pledged as Collateral with Right [Member] Schedule of Goodwill [Table] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Number of consecutive trading days. Number of Consecutive Trading Days Number of consecutive trading days Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Common stock issued Property and equipment, gross Property, Plant and Equipment, Gross Property, Plant and Equipment, Gross, Total Property, Plant and Equipment, Gross, Beginning Balance Property, Plant and Equipment, Gross, Ending Balance Goodwill, Acquired During Period Acquisition Finite-Lived Intangible Assets Acquired Fair Value United Auto Credit 2021-1-B United Auto Credit Two Thousand Twenty One One B [Member] United auto credit two thousand twenty one one B. Entity Interactive Data Current Entity Interactive Data Current Debt Instrument, Convertible, Threshold Consecutive Trading Days Consecutive trading days Financial Asset, Aging [Domain] Accrued Expenses Accrued Liabilities [Member] Total Exposure Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Related Party Transactions Related Party Transactions Disclosure [Text Block] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Intangible Assets Supplemental disclosure of non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Related Party Transactions [Abstract] Schedule of Variable Interest Entities [Table] Leasehold Improvements Leasehold Improvements [Member] Local Phone Number Local Phone Number Unrecognized Tax Benefits, Beginning Balance Unrecognized Tax Benefits, Ending Balance Unrecognized Tax Benefits Uncertain tax positions Summary of Other Relevant Data Related to Finance Receivables Carried at Fair Value Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Summary of Fair Value of Identified Assets Acquired and Liabilities Assumed Summary of Computation of Basic and Diluted Net Loss Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Vesting period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Issuances, net of discount Debt Disclosure [Abstract] Schedule of reconciliation of restructuring liability. Schedule of reconciliation of restructuring liability [Table Text Block] Reconciliation of Beginning and Ending Restructuring Liability Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Initial Public Offering IPO IPO [Member] Consolidated Entities [Axis] Facility One Facility One [Member] Facility One. Lender Name Lender Name [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Number of shares granted Schedule of fair value of consideration transferred. Schedule Of Fair Value Of Consideration Transferred Table [Text Block] Summary of Fair Value of Consideration Transferred Other long-term liabilities Other Liabilities, Noncurrent Other Liabilities, Noncurrent, Total Other liabilities Forward stock split Stockholders' Equity Note, Stock Split, Conversion Ratio Finance Receivables at Fair Value Finance Receivables at Fair Value, Policy [Policy Text Block] Finance receivables at fair value, policy. Debt Instrument, Payment Terms Long-term debt payment terms Income Statement Location Income Statement Location [Domain] Restructuring and Related Cost, Number of Positions Eliminated Number of reduction position Expected payments, 2023 Long-Term Debt, Maturity, Year One Junior Subordinated Debentures Junior Subordinated Debt [Member] Total liabilities assumed Total liabilities assumed Total liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Selling, General and Administrative Expenses Selling, General and Administrative Expenses [Member] Proceeds from sale of finance receivables at fair value, net Proceeds from Sale of Finance Receivables Property, Plant and Equipment [Abstract] Parts and accessories Parts And Accessories Parts and accessories. Impairment of operating lease right-of-use assets. Impairment of operating lease right-of-use assets Impairment of operating lease right-of-use assets Cloud computing arrangements. Cloud Computing Arrangements [Member] Cloud Computing Arrangements Total debt Long-Term Debt Balance (in shares) Balance (in shares) Shares, Outstanding Line of credit facility, unutilized borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Increase (Decrease) in Prepaid Expense and Other Assets, Total Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Inventory Disclosure [Abstract] Summary of Other Relevant Data Related to Debt of Securitized VIEs Carried at Fair Value Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Debt Instrument, Name Debt Instrument, Name [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Intangible Assets, Net (Excluding Goodwill), Total Intangible Assets, Net (Excluding Goodwill) Carrying Value Intangible assets, net Warehouse credit facilities Warehouse credit facilities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Warehouse Credit Facilities Business combination recognized identifiable assets acquired and liabilities assumed warehouse credit facilities. Payments of Debt Issuance Costs Issuance costs paid for convertible senior notes Issuance costs paid for convertible senior notes Long term debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt Vesting [Domain] Net loss per share attributable to common stockholders, basic Earnings Per Share, Basic Earnings Per Share, Basic, Total ASSETS Assets [Abstract] Accrued expenses Increase (Decrease) in Accrued Liabilities Increase (Decrease) in Accrued Liabilities, Total Total gross profit Gross profit (loss) Gross Profit Gross profit Schedule of Securitization Debt of Consolidated VIEs Schedule of Long-Term Debt Instruments [Table Text Block] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Outstanding Principal Debt Instrument, Face Amount Debt instrument aggregate principal amount Contract with Customer, Refund Liability, Current Reserve for estimated returns Financial Instrument Financial Instrument [Axis] Stock split, description Forward stock split, description Stockholders' Equity Note, Stock Split Business acquisition shares cancelled to satisfy working capital adjustment. Business Acquisition Shares Cancelled To Satisfy Working Capital Adjustment Business acquisition shares cancelled to satisfy working capital adjustment Long-Lived Tangible Asset Long-Lived Tangible Asset [Axis] Business Acquisition, Percentage of Voting Interests Acquired Percentage of business acquisition rate Schedule of Restructuring and Related Costs [Table] Debt instrument maturity year. Debt Instrument Maturity Year Debt instrument maturity year LIABILITIES, REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY (DEFICIT) Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Aggregate Principal Balance Financing Receivable, after Allowance for Credit Loss Financing Receivable, after Allowance for Credit Loss, Total Income Taxes Paid, Net, Total Income Taxes Paid, Net Cash paid for income taxes Aggregate principal balance of finance receivables pledged as collateral. Aggregate Principal Balance of Finance Receivables Pledged As Collateral Aggregate Principal Balance of Finance Receivables Pledged as Collateral as of June 30, 2022 (in thousands) Schedule of Aggregate Principal Balance and Fair Value of Finance Receivables Pledged to Securitization Debt Schedule of Finance Receivables Pledged to Securitization Debt [Table Text Block] Schedule of finance receivables pledged to securitization debt. Securitization Debt of Consolidated CFEs Securitization Debt of Consolidated, Collateralized Finance Entities [Member] Securitization debt of consolidated, collateralized finance entities. Developed Technology Rights [Member] Developed Technology Type of Restructuring [Domain] Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Current Assets: Assets, Current [Abstract] Percentage annual increase in shares available for issuance as award in each year beginning Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Annual Increase In Shares Available For Issuance As Award Share-based compensation arrangement by share-based payment award percentage of annual increase in shares available for issuance as award. Acceleration of depreciation of property and equipment. Acceleration of Depreciation of Property and Equipment Acceleration of depreciation of property and equipment Segment Information Segment Reporting Disclosure [Text Block] Aggregate fair value of receivables carried at fair value that are on nonaccrual status Aggregate Fair Value of Receivables Carried at Fair Value on Nonaccrual Status Aggregate fair value of receivables carried at fair value on nonaccrual status. Facility Three Facility Three [Member] Facility Three. Thereafter Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Four Finite-lived intangible assets, amortization expense, rolling after year four United Auto Credit 2021-1-C United Auto Credit Two Thousand Twenty One One C [Member] United auto credit two thousand twenty one one C. Schedule of Goodwill [Table Text Block] Summary of Activity in Carrying Value of Goodwill by Reporting Unit Unitas Holdings Corp. Unitas Holdings corporation. Unitas Holdings corporation [Member] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Debt Conversion, Converted Instrument, Amount Debt conversion, each principal amount initially be convertible Inventory Write-down Provision to record inventory at lower of cost or net realizable value 2020 Vehicle Floorplan Facility New Vehicle Floor Plan Facility [Member] New vehicle floor plan facility. Measurement Frequency Measurement Frequency [Domain] Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Debt Instrument, Convertible, Earliest Date Debt instrument conversion date Developed and Purchased Technology Developed and Purchased Technology Developed and Purchased Technology [Member] Developed and purchased technology Cumulative profit sharing payment recognized Cumulative Profit Sharing Payment Recognized Cumulative profit sharing payment recognized. Accounting Policy [Table] Accounting Policy [Table] Accounting policy. Vehicle floorplan Warehouse credit facilities Restructuring and Related Activities Disclosure [Text Block] Restructuring Activities Cover [Abstract] Product and Service Product and Service [Domain] Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Weighted Average Useful Life Finance Receivables Loans Receivable [Member] Accumulated impairment charge Goodwill impairment charge Goodwill, Impairment Loss Impairment charges Aggregate unpaid principal balance of debt of securitized VIEs Unpaid Principal Balance of Debt Related to Fair Value Unpaid principal balance of debt related to fair value. Acquired Finite-Lived Intangible Assets [Line Items] Current Liabilities: Liabilities, Current [Abstract] Maximum Maximum Maximum [Member] Initial Date of Securitization Debt Instrument Initial Date of Securitization Debt instrument initial date of securitization. United Auto Credit 2021-1-E United Auto Credit Two Thousand Twenty One One E [Member] United auto credit two thousand twenty one one E. Consolidated VIEs Variable Interest Entity, Primary Beneficiary [Member] Realignment Plan Realignment Plan [Member] Realignment plan. Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Furniture and Fixtures Furniture and Fixtures [Member] Shares, Exercised Exercise of stock options (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Vehicle payable Vehicle Payable Current Vehicle payable current. Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Net proceeds from sale of transaction, beneficial interests Net Proceeds from Sale of Transaction Beneficial Interests Net proceeds from sale of transaction beneficial interests. Use of Estimates Use of Estimates, Policy [Policy Text Block] Vesting of restricted stock units (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Variable interest rate Basis points Debt Instrument, Basis Spread on Variable Rate Operating Lease, Impairment Loss Lease impairment charges Financial Asset, Aging [Axis] Inducement award plan. Inducement Award Plan [Member] Inducement Award Plan Transfer out of Level 3 Transfer out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Expected payments, 2022 Long-Term Debt, Maturity, Remainder of Fiscal Year Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Debt instrument, covenant compliance Debt Instrument, Covenant Compliance Common stock, shares authorized Common Stock, Shares Authorized Trading Symbol Trading Symbol Finance receivables held for sale, net (including finance receivables of consolidated VIEs of $137.1 million and $0 million, respectively) Finance receivables held for sale, Carrying value Finance receivables held for sale, net Selling, general and administrative expenses Selling, General and Administrative Expense Selling, General and Administrative Expense, Total Title of Individual [Domain] Subsequent Event Type [Axis] Performance Shares Variable Interest Entity or Potential VIE, Information Unavailability, Disclosures [Abstract] Balance Sheet Location Balance Sheet Location [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Accounts payable Accounts Payable, Current Accounts Payable, Current, Total Availability fee payable each quarter on average unused capacity from prior quarter floorplan allowance percentage Availability Fee Payable Each Quarter On Average Unused Capacity From Prior Quarter Floorplan Allowance Percentage Availability fee payable each quarter on average unused capacity from prior quarter floorplan allowance percentage. Other assets Increase (Decrease) in Other Operating Assets Increase (Decrease) in Other Operating Assets, Total Plan Name [Axis] Warehouse Credit Facility Warehouse Credit Facility [Member] Warehouse credit facility. Warehouse Facilities Title of Individual [Axis] Long-Lived Tangible Asset Long-Lived Tangible Asset [Domain] Sharen based compensation arrangements by share based payment award options exercise price. Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercise Price Exercise price per share Common stock, par value Common stock, par value Common Stock, Par or Stated Value Per Share Issuance of common stock for acquisition of business (in shares) Stock Issued During Period, Shares, Acquisitions Vehicle Floor Plan Facilities [Member] Vehicle Floor plan facilities. Vehicle Floorplan Facility Repurchase of notes in open-market transaction Debt Instrument, Repurchase Amount Comprehensive Loss Comprehensive Income, Policy [Policy Text Block] Issuance of common stock for acquisition of business Stock Issued During Period, Value, Acquisitions Execution Date Line of Credit Facility, Initiation Date Property and Equipment, Net Property, Plant and Equipment Disclosure [Text Block] United Auto Credit 2020-1 United Auto Credit Two Thousand Twenty One [Member] United Auto Credit Two Thousand Twenty One [Member] Junior subordinated debentures Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Noncurrent Long Term Debt Long-Term Debt [Text Block] Debt Instrument [Line Items] Long-Term Debt, Type [Domain] Potentially dilutive shares not included in calculation of diluted shares outstanding Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Segment Reporting, Other Significant Reconciling Item, Consolidated [Abstract] Reconciliation to consolidated loss before provision for income taxes Cash and cash equivalents Total financial assets Cash and Cash Equivalents, Fair Value Disclosure Restructuring Reserve, Accrual Adjustment Accrual and accrual adjustments Schedule of Reconciliation Between Reportable Segment Gross Profit to Consolidated Loss Before Provision for Income Taxes Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]