75000 - Document - Document and Entity Information
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75010 - Statement - Consolidated Balance Sheets
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75020 - Statement - Consolidated Balance Sheets (Parenthetical)
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75030 - Statement - Consolidated Statements of Operations and Comprehensive Income (Loss)
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75040 - Statement - Consolidated Statements of Operations and Comprehensive Income (Loss) 2
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75050 - Statement - Consolidated Statements of Operations and Comprehensive Income (Loss) (Parenthetical)
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75060 - Statement - Consolidated Statements of Redeemable Non-Controlling Interest and Stockholders' Equity
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75070 - Statement - Consolidated Statements of Redeemable Non-Controlling Interest and Stockholders' Equity (Parenthetical)
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75080 - Statement - Consolidated Statements of Cash Flows
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75090 - Statement - Cash, Cash Equivalents and Restricted Cash by Category
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995455 - Disclosure - Cybersecurity Risk Management, Strategy, and Governance
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995465 - Disclosure - Nature of Business
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995475 - Disclosure - Summary of Significant Accounting Policies
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995485 - Disclosure - Recent Accounting Pronouncements
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995495 - Disclosure - Business Combination
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995505 - Disclosure - Fair Value Measurement
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995515 - Disclosure - Balance Sheet Components
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995525 - Disclosure - Leases
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995535 - Disclosure - Commitments and Contingencies
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995545 - Disclosure - Assumed Common Stock Warrants
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995555 - Disclosure - Stockholders' Equity
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995565 - Disclosure - Net Loss Per Share
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995575 - Disclosure - Joint Venture and Redeemable Non-Controlling Interest
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995585 - Disclosure - Income Taxes
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995595 - Disclosure - Related Party Transactions
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995605 - Disclosure - Subsequent Events
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995615 - Disclosure - Summary of Significant Accounting Policies (Policies)
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995625 - Disclosure - Summary of Significant Accounting Policies (Tables)
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995635 - Disclosure - Business Combination (Tables)
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995645 - Disclosure - Fair Value Measurement (Tables)
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995655 - Disclosure - Balance Sheet Components (Tables)
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995665 - Disclosure - Leases (Tables)
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995675 - Disclosure - Commitments and Contingencies (Tables)
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995685 - Disclosure - Stockholders' Equity (Tables)
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995695 - Disclosure - Net Loss Per Share (Tables)
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995705 - Disclosure - Joint Venture and Redeemable Non-Controlling Interest (Tables)
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995715 - Disclosure - Income Taxes (Tables)
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995725 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details)
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995735 - Disclosure - Summary of Significant Accounting Policies - Summary of Property and Equipment and Their Estimated Useful Lives (Details)
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995745 - Disclosure - Recent Accounting Pronouncements - Additional Information (Details)
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995755 - Disclosure - Business Combination - Additional Information (Details)
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995765 - Disclosure - Business Combination - Reconciliation of Elements of Business Combination to Consolidated Statement of Cash Flows and Consolidated Statement of Redeemable Non-Controlling Interest and Stockholders' Equity (Details)
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995775 - Disclosure - Business Combination - Schedule of Number of Shares of Common Stock Issued Immediately Following Consummation of Business Combination (Details)
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995785 - Disclosure - Business Combination - Schedule of Number of Shares of Common Stock Issued Immediately Following Consummation of Business Combination (Parenthetical) (Details)
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995795 - Disclosure - Fair Value Measurement - Summary of Financial Assets Subject to Fair Value Measurements on Recurring Basis (Details)
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995805 - Disclosure - Fair Value Measurement - Summary of Financial Assets Subject to Fair Value Measurements on Recurring Basis (Parenthetical) (Details)
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995815 - Disclosure - Fair Value Measurement - Additional Information (Details)
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995825 - Disclosure - Fair Value Measurement - Summary of Major Security Type Assets That Measured at Fair Value on Recurring Basis (Details)
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995835 - Disclosure - Fair Value Measurement - Summary of Gross Unrealized Losses and Fair Value for Marketable Securities (Details)
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995845 - Disclosure - Fair Value Measurement - Summary of Estimated Amortized Cost and Fair Value of Available-for-Sale Securities by Contractual Maturity (Details)
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995855 - Disclosure - Balance Sheet Components - Schedule of Property and Equipment (Details)
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995865 - Disclosure - Balance Sheet Components - Additional Information (Details)
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995875 - Disclosure - Balance Sheet Components - Schedule of Accrued Liabilities (Details)
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995885 - Disclosure - Balance Sheet Components - Schedule of Other Liabilities (Details)
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995895 - Disclosure - Leases - Additional Information (Details)
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995905 - Disclosure - Leases - Summary of Lease Related Expense (Details)
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995915 - Disclosure - Leases - Summary of Supplemental Cash Flow Information Related to Leases (Details)
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995925 - Disclosure - Leases - Summary of Additional Information for Lease (Details)
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995935 - Disclosure - Leases - Summary of Future Minimum Payments (Details)
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995945 - Disclosure - Leases - Summary of Future Minimum Payments (Details) 2
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995955 - Disclosure - Commitments and Contingencies - Additional Information (Details)
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995965 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Purchase Commitments (Details)
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995975 - Disclosure - Assumed Common Stock Warrants - Additional Information (Details)
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995985 - Disclosure - Stockholders' Equity - Additional Information (Details)
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995995 - Disclosure - Stockholders' Equity - Schedule of Stock Option Activity (Details)
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996005 - Disclosure - Stockholders' Equity - Schedule of Stock Option Activity (Parenthetical) (Details)
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996015 - Disclosure - Stockholders Equity - Schedule of Additional Information Regarding Options Outstanding (Details)
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996025 - Disclosure - Stockholders' Equity - Schedule of Weighted Average Assumptions Used Inputs to Monte Carlo Simulation and Black-Scholes OPM (Details)
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996035 - Disclosure - Stockholders' Equity - Summary of Vesting Tranches (Details)
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996045 - Disclosure - Stockholders' Equity - Schedule of Restricted Stock Units with Service Condition and Performance Stock Unit Activities (Details)
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996055 - Disclosure - Stockholders Equity - Schedule of Stock-based Compensation Expense (Details)
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996065 - Disclosure - Net Loss Per Share - Summary of Basic and Diluted Loss per Share of Common Stock (Details)
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996075 - Disclosure - Net Loss Per Share - Summary of Potential Common Stock Outstanding Excluded from Computation of Diluted Net Loss Per Share (Details)
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996085 - Disclosure - Joint Venture and Redeemable Non-Controlling Interest - Additional Information (Details)
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996095 - Disclosure - Joint Venture and Redeemable Non-Controlling Interest - Schedule of Change in Redeemable Non-Controlling Interest (Details)
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996105 - Disclosure - Income Taxes - Additional Information (Details)
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996115 - Disclosure - Income Taxes - Schedule of Reconciliation of Effective Income Tax Rate (Details)
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996125 - Disclosure - Income Taxes - Components of Net Deferred Tax Assets (Details)
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996135 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Balances of Valuation Allowance (Details)
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996145 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Balances of Unrecognized Tax Benefits (Details)
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996155 - Disclosure - Related Party Transactions - Additional Information (Details)
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Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value
Weighted Average grant date fair value, Vested
Options with weighted average fair value vested
Proceeds from sale of property and equipment
Proceeds from Sale of Property, Plant, and Equipment
Proceeds from Sale of Property, Plant, and Equipment, Total
Finance Lease, Liability, Total
Lease liabilities
Finance Lease, Liability
Financing leases
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Preferred Stock, Shares Issued
Preferred stock, shares issued
Preferred Stock, Shares Issued, Total
Share based compensation award tranche four.
Share Based Compensation Award Tranche Four [Member]
Tranche Four
Tranche 4
Finance lease liability payments net of reimbursements due year four.
Finance Lease Liability Payments Net Of Reimbursements Due Year Four
2029
Plan Name [Axis]
Plan Name
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer
Fair value 12 consecutive months or longer
Entity Current Reporting Status
Entity Current Reporting Status
Percentage of option granted to Stockholder.
Percentage Of Option Granted To Stockholder
Options is granted to stockholder, percentage
Proceeds from Warrant Exercises
Proceeds from exercise of warrants
Net proceeds from warrant exercises
Japan
JAPAN
US Government Agencies Debt Securities [Member]
US Government Securities
U.S. Government and Agency Securities
Joint Venture Termination and Release Agreement [Member]
Joint venture termination and release agreement.
JV Termination Agreement
Operating Expenses [Abstract]
Operating expenses:
California Franchise Tax Board [Member]
California Franchise Tax Board
Fair Value, Inputs, Level 2 [Member]
Level 2
Deferred Tax Assets, Net of Valuation Allowance
Total deferred tax assets
Commitments and Contingencies Disclosure [Text Block]
Commitments and Contingencies
Common Stock, Shares Authorized
Common stock, authorized
Share-Based Payment Arrangement, Tranche Three [Member]
Tranche Three
Tranche 3
Fair Value by Liability Class [Domain]
Fair Value by Liability Class
Document Fiscal Period Focus
Document Fiscal Period Focus
Accounting Standards Update 2023-09 [Member]
ASU 2023-09
Entity Shell Company
Entity Shell Company
Other Accrued Liabilities, Current
Other
Private placement warrants.
Private Placement Warrants [Member]
Private Placement Warrants
Segment Reporting, Policy [Policy Text Block]
Segments
Cash and Cash Equivalent
Cash and cash equivalents
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
Cash and cash equivalents
Litigation settlement legal fees
Litigation Settlement, Fee Expense
Lease Termination Agreement Member
Lease Termination Agreement.
Lease Termination Agreement
Cybersecurity Risk Management, Strategy, and Governance [Abstract]
Common Stock, Shares, Issued
Common stock, issued
Common Stock, Shares, Issued, Total
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]
Cybersecurity Risk Board of Directors Oversight [Text Block]
Asset Class [Domain]
Asset Class
Statement [Table]
Statement [Table]
Restricted Cash, Noncurrent
Other assets
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Increase—current year positions
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Right-of-use assets obtained in exchange for new operating lease liabilities
U S Government Money Market Fund And Marketable Securities [Member]
US Government Money Market Fund and Marketable Securities
US government money market fund and marketable securities.
Share based compensation arrangement by share based payment award purchase or exercise price per share percentage.
Share Based Compensation Arrangement By Share Based Payment Award Purchase Or Exercise Price Per Share Percentage
Options purchase or exercise price per share
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Weighted average fair value at grant date
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent
Options granted price per share
Amortized Cost, Due after one year and through five years
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five
Statement [Line Items]
Statement [Line Items]
Business Combination [Domain]
Business Acquisition, Acquiree
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price
Expired (in dollars per share)
Entity Filer Category
Entity Filer Category
General and Administrative Expenses
Selling, General and Administrative Expenses, Policy [Policy Text Block]
Temporary Equity, Net Income
Net income (loss), Redeemable Non-Controlling interest
Liabilities and Equity
Total liabilities and stockholders' equity
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date
Total Amortized Cost
Number of tranches achieved business milestone
Number Of Tranches Achieved Business Milestone
Number of tranches achieved business milestone.
Finance lease.
Finance Lease [Abstract]
Finance lease
Payments to Acquire Marketable Securities
Purchases of marketable securities
Payments to Acquire Marketable Securities, Total
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Vested and exercisable (in dollars per share)
Triple point capital warrants one and two.
Triple Point Capital Warrants One And Two [Member]
TPC1 And TPC 2 Warrants
Long-Lived Tangible Asset [Axis]
Long-Lived Tangible Asset
Depreciation and amortization of property and equipment.
Depreciation And Amortization Of Property And Equipment
Depreciation and amortization expense related to property and equipment
Accrued Property And Equipment Current
Accrued property and equipment current.
Accrued property and equipment
Increase
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount
Valuation allowance increase, amount
Increase
Deferred tax liabilities right of use assets.
Deferred Tax Liabilities Right Of Use Assets
Right of use assets
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]
Exercise Price Range [Axis]
Exercise Price Range
Deferred Tax Assets, Valuation Allowance
Valuation allowance
End of the year
Beginning of the year
Deferred Tax Assets, Valuation Allowance, Total
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Federal Statutory rate
U.S. Federal Statutory Tax Rate, percent
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount, Total
Other
Cybersecurity Risk Management Third Party Engaged [Flag]
Documents Incorporated by Reference [Text Block]
Documents Incorporated by Reference
Other Noncash Income (Expense), Total
Other Noncash Income (Expense)
Other
Other
Effective Income Tax Rate Reconciliation, Percent
Effective tax rate, percent
Options
Convertible Debt Securities [Member]
Corporate Notes and Bonds
Investment Income, Interest
Interest income
23.04
Exercise Price Range Four.
Exercise Price Range Four [Member]
Income Tax Jurisdiction [Axis]
Income Tax Authority
Summary of Income Tax Contingencies [Table Text Block]
Reconciliation of Beginning and Ending Balances of Unrecognized Tax Benefits
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]
Cash and Cash Equivalents and Restricted Cash
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Numerator:
Additional Paid in Capital, Common Stock
Additional paid-in-capital
Additional Paid in Capital, Common Stock, Beginning Balance
Additional Paid in Capital, Common Stock, Ending Balance
Significant Accounting Policies [Text Block]
Summary of Significant Accounting Policies
Property, Plant and Equipment [Line Items]
Property Plant And Equipment [Line Items]
Schedule of earnings per share basic and diluted.
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Schedule Of Earnings Per Share Basic And Diluted [Line Items]
Share based compensation arrangement by share based payment award stock price targets description.
Share Based Compensation Arrangement By Share Based Payment Award Stock Price Targets Description
Stock price targets description
Vesting [Domain]
Granted stock option
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross
Granted (in shares)
Cybersecurity Risk Management, Strategy, and Governance [Table]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Summary of Basic and Diluted Loss per Share of Common Stock
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation and Amortization, Amount
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation and Amortization, Amount, Total
Non deductible expense under collaboration agreement
Proceeds from Issuance of Preferred Stock and Preference Stock
Proceeds from issuance of Series F preferred stock, net of issuance costs
Investment, Name [Axis]
Investment, Name
Aggregate offering price
Aggregate Offering Price
Aggregate offering price.
Earnings Per Share, Basic, Total
Earnings Per Share, Basic
Net loss per share attributable to Class A and Class B Common stockholders - Basic
Net loss per share - Basic
Computer equipment, hardware and software.
Computer Equipment, Hardware, and Software [Member]
Computer Equipment, Hardware, and Software
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number
Outstanding at the end of the period (in shares)
Outstanding at the beginning of the period (in shares)
Remaining number of shares outstanding
Stock options outstanding
Deferred tax assets lease liability.
Deferred Tax Assets Lease Liability
Lease liability
Deferred tax assets tax Accruals and stock-based compensation.
Deferred Tax Assets Tax Accruals And Stock Based Compensation
Accruals and stock-based compensation
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation and Amortization, Percent
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation and Amortization, Percent, Total
Non deductible expense under collaboration agreement, percent
Non deductible expense under collaboration agreement, percent
Liabilities, Current
Total current liabilities
Total current liabilities
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]
Adjustments to reconcile net loss to net cash used in operating activities:
Long-Term Purchase Commitment [Table Text Block]
Schedule of Future Minimum Purchase Commitments
Lessee, Operating Lease, Liability, to be Paid, Year Five
2030
Domestic Tax Jurisdiction [Member]
Federal
Purchase Obligation, to be Paid, Year Two
Minimum purchase commitments, 2027
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions
Increase—prior year positions
Accounting Standards Update [Axis]
Accounting Standards Update
Equity, Attributable to Parent [Abstract]
Stockholders’ equity
Entity Small Business
Entity Small Business
Retained Earnings (Accumulated Deficit)
Accumulated deficit
Retained Earnings (Accumulated Deficit), Total
Retained Earnings (Accumulated Deficit), Beginning Balance
Retained Earnings (Accumulated Deficit), Ending Balance
Volkswagen [Member]
Volkswagen.
VGA
Nature of Operations [Text Block]
Nature of Business
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period
Cancelled and forfeited (in shares)
Options forfeited
Long-term advance payments and others
Long-term Advance Payments and Others
Long-term advance payments and others.
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value
Aggregate intrinsic value
Warrants sold
Warrants Sold
Warrants sold.
Cash Received Under Collaboration Agreement Related Party
Cash received under collaboration agreement related party.
Cash received under collaboration agreement - related party
Public warrants.
Public Warrants [Member]
Public Warrants
Public Warrants
Proceeds from issuance of PIPE financing.
Proceeds From Issuance Of P I P E Financing
Cash- PIPE Financing
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Two Thousand Twenty Four Bonus Plan [Member]
Two thousand twenty four bonus plan.
2024 Bonus Plan
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Life (Years)
Lease Contractual Term [Axis]
Leases [Abstract]
Common Class A [Member]
Class A Common Stock
Noncash or Part Noncash Acquisition, Value of Assets Acquired
Less: non-cash net assets assumed from Kensington
Noncash or Part Noncash Acquisition, Value of Assets Acquired, Total
Lessee, Lease, Description [Line Items]
Amendment Flag
Amendment Flag
Operating loss carryforward expiration.
Operating Loss Carryforward Expiration [Member]
Expire Beginning in 2030, If Not Utilized
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
U.S. Federal Statutory Tax Rate
Cost of equity
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Cost of Equity
Share based compensation arrangement by share based payment award fair value assumptions cost of equity.
Two Thousand Twenty Employee Stock Purchase Plan.
Two Thousand Twenty Employee Stock Purchase Plan [Member]
2020 Equity Employee Stock Purchase Plan
Share based compensation award tranche five.
Share Based Compensation Award Tranche Five [Member]
Tranche Five
Tranche 5
Finance Lease, Interest Expense
Interest on lease liabilities
Earnings Per Share, Policy [Policy Text Block]
Net Loss per Share of Common Stock
Proceeds from noncash net assets.
Proceeds From Noncash Net Assets
Non-cash net assets assumed from Kensington
Liabilities and Equity [Abstract]
Liabilities and stockholders' equity
Entity Address, Postal Zip Code
Entity Address Postal Zip Code
Percentage of Related Party Voting Interests
Percentage of related party voting interests.
Percentage of related party voting interest
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Net cash used in operating activities
Net cash used in operating activities
Increase (Decrease) in Operating Lease Liability
Operating lease liability
Common Stock [Member]
Common Stock
Accounting Standards Update and Change in Accounting Principle [Table]
New Accounting Pronouncements Or Change In Accounting Principle [Table]
Cybersecurity Risk Role of Management [Text Block]
Tax Credit Carryforward, Amount
Research and development credits
Lessee, Operating Lease, Liability, to be Paid, Year Three
2028
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Accumulated depreciation and amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance
Debt Securities, Available-for-Sale [Line Items]
Schedule of Available for Sale Securities [Line Items]
Stock Issued During Period Value Stock Options Exercised And Employee Stock Purchase Plan
Stock issued during period value stock options exercised and employee stock purchase plan.
Exercise of stock options and employee stock purchase plan
Entity Address, Address Line One
Entity Address, Address Line One
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]
Change in accounting principle, accounting standards update, immaterial effect
Schedule of Weighted Average Assumptions Used Inputs to Monte Carlo Simulation and Black-Scholes OPM
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV
Net loss per share of common stock attributable to common stockholders
Earnings Per Share [Abstract]
Income Tax, Policy [Policy Text Block]
Income Taxes
Finance lease liability payments net of reimbursements due after year five.
Finance Lease Liability Payments Net Of Reimbursements Due After Year Five
Thereafter
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]
Supplemental Cash Flow Information [Abstract]
Supplemental disclosure of cash flow information
Stockholders' Equity Note, Redeemable Preferred Stock, Issue, Policy [Policy Text Block]
Convertible Preferred Stock
Finance lease liability payments net of reimbursements due year five.
Finance Lease Liability Payments Net Of Reimbursements Due Year Five
2030
Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value
Total Fair Value
Operating Lease, Right-of-Use Asset
Right-of-use assets - operating lease
Finance Lease, Liability, Undiscounted Excess Amount
Less present value discount
Debt Securities, Available-for-Sale, Unrealized Loss Position
Total fair value
Deferred Tax Assets, Gross
Gross deferred tax assets
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]
Net Income (Loss) Attributable to Noncontrolling Interest
Net Income (Loss) Attributable to Noncontrolling Interest, Total
Net income (loss) attributable to redeemable non-controlling interest in QSV
Less: Net (loss) income attributable to non-controlling interest, net of tax of $0
Class of Warrant or Right [Axis]
Class of Warrant or Right
Document Type
Document Type
Working Capital Warrants [Member]
Working capital warrants.
Working Capital Warrants
Effective Income Tax Rate Reconciliation, Reconciling Items, Amount
Effective income tax rate reconciliation, reconciling items, amount.
Effective Tax Rate
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
Collaborative Arrangement and Arrangement Other than Collaborative
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Collaborative Arrangement and Arrangement Other than Collaborative
Entity Central Index Key
Entity Central Index Key
Investments, Debt and Equity Securities [Abstract]
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]
Private placement warrants and working capital warrants redemption July 30, 2021.
Private Placement Warrants And Working Capital Warrants Redemption July Thirty Twenty Twenty One [Member]
Private Placement and Working Capital Warrants Redemption Starting July 30, 2021
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation
Net increase (decrease) in cash, cash equivalents and restricted cash
Subsequent Event Type [Domain]
Fair Value Adjustment of Warrants
Change in fair value of convertible preferred stock warrant liabilities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Antidilutive
Balance Sheet Related Disclosures [Abstract]
Sublease income in remainder of fiscal year
Future Minimum Sublease Rentals, Sale Leaseback Transactions, Remainder of Fiscal Year
Joint venture and non controlling interest.
Joint Venture And Non Controlling Interest [Text Block]
Joint Venture and Redeemable Non-Controlling Interest
Legacy Quantum Scape.
Legacy Quantum Scape [Member]
Legacy Quantum Scape
Write-off of property and equipment
Write off of long-lived assets
Impairment of Long-Lived Assets to be Disposed of
Common Stock, Par or Stated Value Per Share
Common stock, par value
Accounting Standards Update [Domain]
Accounting Standards Update
Funds Reserved for Future Contribution Ceased Amount
Funds reserved for future contribution ceased amount.
Ceased amount of funds reserved for future contribution
Share-Based Payment Arrangement, Tranche One [Member]
Tranche One
Tranche 1
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term (Years)
Asset Retirement Obligation, Current
Asset retirement obligation
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed
Add: accrued transaction costs and advisor fees
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed, Total
Debt Securities, Available-for-Sale, Amortized Cost
Amortized Cost
Debt Securities, Available-for-Sale
Fair Value
Debt Securities, Available-for-sale, Total
Operating loss carryforwards expiration beginning year.
Operating loss carryforwards, expire beginning date
Operating Loss Carryforwards Expiration Beginning Year
Lease termination loss
Gain (Loss) on Termination of Lease
Document Financial Statement Error Correction [Flag]
Statement of Financial Position Location, Activity, Accrual [Axis]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period
Exercise of stock option, Shares
Exercised (in shares)
Proceeds from finance lease.
Proceeds From Finance Lease
Financing (incoming) cash flows - finance lease
VGA.
VGA
V G A [Member]
Marketable Securities
Marketable securities
Marketable Securities, Total
Accrued liabilities
Accrued liabilities
Accrued Liabilities, Current
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Less: transaction costs and advisory fees for QuantumScape allocated to warrants
Noncash or Part Noncash, transaction costs and advisory fees allocated to warrants.
Noncash Or Part Noncash Transaction Costs And Advisory Fees Allocated To Warrants
Series F Preferred Stock [Member]
Series F Preferred Stock
Current Fiscal Year End Date
Current Fiscal Year End Date
Purchase Obligation, to be Paid, after Year Five
Minimum purchase commitments, Thereafter
Lessee operating lease expiration year.
Lessee Operating Lease Expiration Year
Operating lease expiration, year
Entity Address, State or Province
Entity Address, State or Province
Number of Units, Beginning Balance
Number of Units, Ending Balance
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Summary Of Asset Retirement Obligation Activity
Schedule of Asset Retirement Obligations [Table Text Block]
Private investment in public equity financing.
Private Investment In Public Equity Financing [Member]
PIPE Financing
Securities class action litigation settlement amount accrued for other matters
Securities Class Action Litigation Settlement Amount Accrued for Other Matters
Securities class action litigation settlement amount accrued for other matters.
Tranche one.
Tranche One [Member]
Tranche One
Investment, Name [Domain]
Investment, Name
Financial Liabilities Fair Value Disclosure, Total
Financial Liabilities Fair Value Disclosure
Financial liabilities subject to fair value measurements on recurring basis
Preferred Stock, Shares Outstanding
Preferred stock, outstanding
Preferred Stock, Shares Outstanding, Beginning Balance
Preferred Stock, Shares Outstanding, Ending Balance
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Comprehensive loss attributable to common stockholders
2023 Bonus Plan
Two Thousand Twenty Three Bonus Plan [Member]
Two thousand twenty three bonus plan.
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax
Gross Unrealized Gain
Research and Development Expense, Policy [Policy Text Block]
Research and Development Cost
Common Stock are reserved and available for future issuance
Common Stock, Capital Shares Reserved for Future Issuance
Common stock reserved for future issuance
Class of Warrant or Right [Domain]
Class of Warrant or Right
Marketable Securities, Current
Marketable securities
Marketable Securities, Current, Total
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
Schedule of Additional Information Regarding Options Outstanding
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Schedule of Stock-based Compensation Expense
Finance leases costs.
Finance Leases Costs [Abstract]
Finance lease costs:
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Components of Net Deferred Tax Assets
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income (loss):
PSUs
Performance Shares [Member]
Proceeds from Sale and Maturity of Marketable Securities
Proceeds from maturities of marketable securities
Proceeds from Sale and Maturity of Marketable Securities, Total
Subsequent Event
Subsequent Event [Member]
$1.05 - $1.35
Exercise Price Range One.
Exercise Price Range One [Member]
Litigation-related accrual
Estimated Litigation Liability, Current
Marketable Securities, Policy [Policy Text Block]
Marketable Securities
Property, Plant and Equipment [Abstract]
Other Assets, Noncurrent
Other assets
Other Assets, Noncurrent, Total
Lessee, Finance Lease, Existence of Option to Extend [true false]
Finance lease, existence of option to extend
Antidilutive Securities [Axis]
Antidilutive Securities
Expired (in shares)
Expired (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Fair value of stock units vested
Intrinsic value, vested and exercisable at end of period
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Proceeds from Sale of Debt Securities, Available-for-Sale
Proceeds from sale of available-for sale marketable securities
Share-Based Payment Arrangement, Option, Exercise Price Range [Table]
Schedule Of Share Based Compensation Shares Authorized Under Stock Option Plans By Exercise Price Range [Table]
State and Local Jurisdiction [Member]
State
Operating and finance lease amortization of right-of-use asset and non-cash lease expense.
Operating and Finance Lease Amortization of Right of Use Asset and Non-Cash Lease Expense
Amortization of right-of-use assets and non-cash lease expense
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss)
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions
Decrease--current year positions
Preferred Stock, Value, Issued
Preferred stock - $0.0001 par value
Preferred Stock, Value, Issued, Total
Preferred Stock, Value, Issued, Beginning Balance
Preferred Stock, Value, Issued, Ending Balance
Preferred stock- $0.0001 par value; 100,000 shares authorized, none issued and outstanding as of December 31, 2025 and 2024
Business combination exchange ratio.
Business Combination Exchange Ratio
Business combination exchange ratio
Minimum
Minimum [Member]
Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Weighted Average grant date fair value, Granted
Financial Instrument [Axis]
Financial Instrument
Assets, Current [Abstract]
Current assets
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right
Warrant exercisable number of shares
Common Class B [Member]
Class B Common Stock
Fair Value, Inputs, Level 3 [Member]
Level 3
Number of shareholder derivative suit filed.
Number Of Shareholder Derivative Suit Filed
Number of shareholder derivative suit filed
Deferred Tax Liabilities, Property, Plant and Equipment
Fixed assets
Tax Period [Domain]
Tax Period
Number of tranches considered probable
Number of Tranches Considered Probable
Number of tranches considered probable.
Liabilities, Current [Abstract]
Current liabilities
Related Party Transactions [Abstract]
Base rent receivable under sublease
Base rent receivable under sublease.
Purchase Obligation, to be Paid, Year Three
Minimum purchase commitments, 2028
Shares, Outstanding
Ending balance, Shares
Beginning balance, Shares
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]
Summary of Additional Information Gross Unrealized Losses and Fair Value By Major Security For Marketable Securities
Operating loss carryforwards
Operating Loss Carryforwards
Operating Loss Carryforwards, Total
Proceeds from Stock Plans
Proceeds from employee stock purchase plan
Commitments and Contingencies
Commitment and contingencies (see Note 7)
Lessee, Leases [Policy Text Block]
Leases
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Weighted Average grant date fair value, Ending Balance
Weighted Average grant date fair value, Beginning Balance
Schedule Of Other Liabilities Table Text Block
Schedule Of other liabilities table text block.
Schedule Of Other Liabilities
General and Administrative Expense [Member]
General and Administrative
Lease liabilities
Operating Lease, Liability
Operating lease liabilities
Operating Lease, Liability, Total
Less: transaction costs and advisory fees for Kensington
Payments of Merger Related Costs, Financing Activities
Auditor Firm ID
Leases
Lessee Finance Leases And Operating Leases [Text Block]
Lessee finance leases and operating leases.
Forecast [Member]
Forecast
Document and entity information.
Document And Entity Information [Table]
Document And Entity Information [Table]
2020 equity incentive award plan.
Two Thousand Twenty Equity Incentive Award Plan [Member]
2020 Equity Incentive Award Plan
Finance Lease, Liability, Current
Finance lease liability, short-term
Lessee, Lease, Description [Table]
Finance Lease, Weighted Average Discount Rate, Percent
Weighted-average discount rate - finance lease
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent
Changes in Valuation Allowances - Federal, percent
Changes in Valuation Allowances, percent
Purchases of property and equipment, not yet paid
Capital Expenditures Incurred but Not yet Paid
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Net loss
Net loss
Lease Contractual Term [Domain]
Assumed Private Placement Common Stock Warrants Member
Assumed Private Placement Common Stock Warrants [Member]
Assumed Private Placement Common Stock Warrants
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount
Stock-based compensation
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]
Weighted Average Number of Shares Outstanding, Basic, Total
Weighted Average Number of Shares Outstanding, Basic
Weighted average Class A and Class B Common Stock outstanding - Basic
Weighted-average common shares outstanding - Basic
March two thousand twenty one public offering.
March Two Thousand Twenty One Public Offering [Member]
March 2021 Public Offering
Scenario [Axis]
Scenario
Finance lease liability payments net of reimbursements due.
Finance Lease Liability Payments Net Of Reimbursements Due
Total
Summary Of Vesting Tranches [Table Text Block]
Summary of vesting tranches.
Summary of Vesting Tranches
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Percent
Stock-based compensation, percent
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule of Reconciliation of Effective Income Tax Rate
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Gross unrealized loss 12 consecutive months or longer
Long-Lived Tangible Asset [Domain]
Long-Lived Tangible Asset
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]
Deferred Tax Assets, Net [Abstract]
Deferred tax assets:
Subsequent Events
Subsequent Events [Text Block]
Number of tranches.
Number of tranches
Related Party Transactions
Related Party Transactions Disclosure [Text Block]
Assumed common stock warrant liability.
Assumed Common Stock Warrant Liability Policy [Text Block]
Assumed Common Stock Warrants Liability
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
Stock-based compensation
APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total
Deferred Tax Asset, In-Process Research and Development
Section 174 capitalized research & development
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount
Changes in Valuation Allowances - Federal
Equity, Attributable to Parent
Beginning balance
Total stockholders’ equity
Ending balance
Preferred Stock, Par or Stated Value Per Share
Preferred stock, par value
Statement of Financial Position Location, Activity, Accrual [Domain]
Basis of Accounting, Policy [Policy Text Block]
Basis of Presentation
Statement of Stockholders' Equity [Abstract]
Share-Based Payment Arrangement, Tranche Two [Member]
Tranche Two
Tranche 2
Use of Estimates, Policy [Policy Text Block]
Use of Estimates
U.S. provision for income taxes
Federal, State, and Local, Income Tax Expense (Benefit), Continuing Operations
Federal, State, and Local, Income Tax Expense (Benefit), Continuing Operations, Total
Leasehold Improvements [Member]
Leasehold Improvements
Joint venture and redeemable non-controlling interest.
Joint Venture And Redeemable Non Controlling Interest Policy [Text Block]
Joint Venture and Redeemable Non-Controlling Interest
Fair Value Disclosures [Text Block]
Fair Value Measurement
Lessee operating lease extension of lease term month and year.
Lessee Operating Lease Extension Of Lease Term Month And Year
Operating lease extension expiration, month and year
Summary of supplemental cash flow information related to leases.
Summary Of Supplemental Cash Flow Information Related To Leases Table [Text Block]
Summary of Supplemental Cash Flow Information Related to Leases
Triple Point Capital one warrants.
Triple Point Capital One Warrants [Member]
TPC1 Warrants
Warrants and Rights Note Disclosure [Abstract]
Schedule of Accrued Liabilities [Table Text Block]
Schedule of Accrued Liabilities
Business Combination, Effective Date of Acquisition
Business combination, effective date of acquisition
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Reconciliation of Beginning and Ending Balances of Unrecognized Tax Benefits
Gross settlement amount
Loss Contingency, Damages Awarded, Value
Milestones Currently, Not Probable of Achievement
Share-based Payment Arrangement, Not Probable of Achievement [Member]
Share-based Payment Arrangement, Not Probable of Achievement.
Plan Name [Domain]
Plan Name
Assumed common stock warrants disclosure.
Assumed Common Stock Warrants Disclosure [Text Block]
Assumed Common Stock Warrants
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]
Stock Issued During Period Shares Stock Options Exercised And Employee Stock Purchase Plan
Stock issued during period shares stock options exercised and employee stock purchase plan.
Exercise of stock options and employee stock purchase plan, Shares
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]
Joint venture and non controlling interest.
Joint Venture And Non Controlling Interest [Line Items]
Joint Venture And Non Controlling Interest [Line Items]
Shares issued upon vesting of restricted stock units value.
Shares Issued Upon Vesting Of Restricted Stock Units Value
Shares issued upon vesting of restricted stock units, value
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]
Debt Securities [Member]
Marketable Securities
Tax Period
Tax Period [Axis]
Related and Nonrelated Parties [Axis]
Related Party
Class of Warrant or Right [Table]
Class Of Warrant Or Right [Table]
Foreign Tax Jurisdiction [Member]
Property, Plant and Equipment, Policy [Policy Text Block]
Property and Equipment
Entity Address, City or Town
Entity Address, City or Town
Income tax.
Income Tax [Table]
Income Tax [Table]
Operating lease.
Operating Lease [Abstract]
Operating lease
Number of Reportable Segments
Number of reportable segment
Security Exchange Name
Security Exchange Name
Redeemable Noncontrolling Interest, Equity, Carrying Amount
Redeemable Non-Controlling, Ending balance
Redeemable Non-Controlling, Beginning balance
Redeemable non-controlling interest
Redeemable Noncontrolling Interest, Equity, Carrying Amount, Total
Business Combination, Date of Acquisition Agreement
Business combination, date of acquisition agreement
Property, Plant and Equipment, Gross
Property and equipment, gross
Property, Plant and Equipment, Gross, Total
Property, Plant and Equipment, Gross, Beginning Balance
Property, Plant and Equipment, Gross, Ending Balance
Counterparty Name [Axis]
Loss before income taxes
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
Loss before income taxes
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number
Vested and expected to vest at the end of the period (in shares)
Lessee, operating lease, lease not yet commenced, description
Lessee, Operating Lease, Lease Not yet Commenced, Description
Summary of additional information for leases.
Summary of Additional Information for Leases [Table Text Block]
Summary of Additional Information for Leases
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent
Foreign Tax Effects, percent
Foreign Tax Effects, percent
Stockholders' Equity Note [Abstract]
Deferred Tax Assets, Goodwill and Intangible Assets
Intangibles
Purchase price per share.
Purchase Price Per Share
Aggregate purchase price per share
Interest Paid, Excluding Capitalized Interest, Operating Activity
Cash paid for interest
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table]
Statistical Measurement [Domain]
Statistical Measurement
Class of Warrant or Right, Exercise Price of Warrants or Rights
Warrant exercise price
Warrants exercise price per share
Assets, Current
Total current assets
Total current assets
Stock-based compensation expense
Share-Based Payment Arrangement, Expense
Total stock-based compensation expense
Document Period End Date
Document Period End Date
Tranche two.
Tranche Two [Member]
Tranche Two
Series D convertible preferred stock.
Series D Convertible Preferred Stock [Member]
Series D Convertible Preferred Stock
Title and Position [Axis]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV
Stock Issued During Period, Shares, At-the-market Offering, Net of Issuance Costs
Stock issued during period, shares, at-the-market offering, net of issuance costs.
Shares issued under At-The-Market Offering, net of issuance costs, Shares
ICFR Auditor Attestation Flag
ICFR Auditor Attestation Flag
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number
Vested and exercisable at the end of the period (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Purchased for Award
Number of shares purchased
Lease Termination Date
Lease termination date.
Lease termination date
Private placement warrants and working capital warrants.
Private Placement Warrants And Working Capital Warrants [Member]
Private Placement and Working Capital Warrants
Statement of Financial Position [Abstract]
Restricted Stock Unit
RSUs
Restricted Stock Units (RSUs) [Member]
Antidilutive Security, Excluded EPS Calculation [Table]
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]
Business milestones description.
Business Milestones Description
Business milestones description
Vesting [Axis]
Class of Stock [Axis]
Class of Stock
Deferred Tax Liabilities, Net, Total
Deferred Tax Liabilities, Net
Total deferred tax liabilities
Fair value of assumed common stock warrants exercised.
Fair Value Of Assumed Common Stock Warrants Exercised
Fair value of assumed common stock warrants exercised
Shares Issued Upon Vesting Of Restricted Stock Units
Shares issued upon vesting of restricted stock units.
Shares issued upon vesting of restricted stock units, shares
Current Income Tax Expense (Benefit)
Current income tax expense (benefit)
Current Income Tax Expense (Benefit), Total
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Finance lease liability payments net of reimbursements due year three.
Finance Lease Liability Payments Net Of Reimbursements Due Year Three
2028
Liabilities
Total liabilities
Total liabilities
Kensington.
Kensington [Member]
Kensington
Financial Instruments [Domain]
Financial Instruments
Summary of Financial Assets Subject to Fair Value Measurements on Recurring Basis
Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block]
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One
Amortized Cost, Due within one year
Capital Units, Authorized
Capital stock, shares authorized
Number of Identified Business Milestones
Number of Identified Business Milestones
Number of identified business milestones
Asset Retirement Obligations, Noncurrent, Total
Asset Retirement Obligations, Noncurrent
Asset retirement obligation
Foreign Income Tax Expense (Benefit), Continuing Operations
Foreign Income Tax Expense (Benefit), Continuing Operations, Total
Foreign tax provision (benefit)
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One
Fair Value, Due within one year
Net Business Combination
Proceeds from Contributions from Parent
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period
Options contractual terms
Less: transaction costs and advisory fees for QuantumScape allocated to equity
Transaction costs and advisory fees for allocated to equity.
Transaction Costs And Advisory Fees For Allocated To Equity
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount
Foreign Tax Effects
Lessee, Operating Lease, Liability, to be Paid, Year Two
2027
Restricted Cash
Restricted cash
Restricted Cash, Total
Finance Lease, Right-of-Use Asset, Amortization
Amortization of right-of-use assets- finance lease
Payments for Dissolution of Joint Venture
Payments for dissolution of joint venture.
Dissolution of joint venture
Dissolution of joint venture
Number of shares sold.
Number O Shares Sold
Aggregate number of shares sold
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Gross unrealized loss less than 12 consecutive months
Net income loss tax portion attributable to noncontrolling interest.
Net Income Loss Tax Portion Attributable To Noncontrolling Interest
Net (loss) income attributable to non-controlling interest, tax
Proceeds from sales of marketable securities.
Proceeds From Sales Of Marketable Securities
Proceeds from sales of marketable securities
Weighted Average Number of Shares Outstanding, Diluted
Weighted-average common shares outstanding - Diluted
Weighted average Class A and Class B Common Stock outstanding - Diluted
Securities Act File Number
Entity File Number
Unrealized gain (loss) on marketable securities
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
Unrealized gain on marketable securities
Accounting Standards Update 2023-07 [Member]
ASU 2023-07
Cover [Abstract]
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total
Accounts payable, accrued liabilities and accrued compensation and benefits
Number of officers and directors in shareholder derivative suit.
Number Of Officers And Directors In Shareholder Derivative Suit
Number of officers and directors in shareholder derivative suit
Prepaid Expense and Other Assets, Current
Prepaid expenses and other current assets
Number of Units, Forfeited
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Supplemental Balance Sheet Disclosures [Text Block]
Balance Sheet Components
Summary of Valuation Allowance [Table Text Block]
Reconciliation of Beginning and Ending Balances of Valuation Allowance
Related Party Payment Received
Related party payments received.
Payments received
Scenario [Domain]
Scenario
Management Team and Certain Other Employees
management team and certain other employees [Member]
Management team and certain other employees.
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized
Common stock authorized for issuance
Number of Operating Segments
Number of operating segment
Sale of Stock [Domain]
Sale of Stock
Professional services and legal contingency
Professional services and legal contingency.
General and Administrative Expense
General and administrative
General and Administrative Expense, Total
Class of warrant or right issued in connection with the closing of business combination.
Class Of Warrant Or Right Issued In Connection With Closing Of Business Combination
Warrant issued in connection with the closing of business combination
Business combination.
Business Combination [Line Items]
Business Combination [Line Items]
Tranche three.
Tranche Three [Member]
Tranche Three
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price
Vested and expected to vest (in dollars per share)
Estimated useful lives of assets
Property, Plant and Equipment, Useful Life
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Summary of Future Minimum Payments
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Accrued Compensation and Benefits
Employee-related Liabilities, Current [Member]
Employee-related liabilities, current.
Options vesting period
Vesting period
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period
Extraordinary performance award program.
Extraordinary Performance Award Program [Member]
EPA
Potential Funding Contribution Amount
Potential funding contribution amount.
Potential funding contribution amount
Series A convertible preferred stock.
Series A Convertible Preferred Stock [Member]
Series A Convertible Preferred Stock
Estimated Useful Lives of Assets
Schedule of estimated useful lives of assets.
Schedule Of Estimated Useful Lives Of Assets [Table Text Block]
Summary of Property and Equipment and Their Estimated Useful Lives of Assets
Share based compensation arrangement by share based payment award stock price targets.
Share Based Compensation Arrangement By Share Based Payment Award stock price targets
Stock price targets
Stock Price Target
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount
Unrecognized compensation costs
Common Stock, Shares, Outstanding
Common stock, outstanding
Common Stock, Shares, Outstanding, Beginning Balance
Common Stock, Shares, Outstanding, Ending Balance
Operating Lease, Liability, Current
Operating lease liability, short-term
Depreciation, Depletion and Amortization
Depreciation and amortization
Depreciation, Depletion and Amortization, Total
Cybersecurity Risk Management Processes Integrated [Flag]
Document Transition Report
Document Transition Report
Deferred Tax Assets, Net
Total net deferred tax assets
Investment securities
Short-Term Investments
Short-term Investments, Total
Operating Expenses
Total operating expenses
Total operating expenses
Series F convertible preferred stock.
Series F Convertible Preferred Stock [Member]
Series F Convertible Preferred Stock
Accrued Liabilities, Current [Abstract]
Research and Development Expense
Research and development
Research and Development Expense, Total
2025 Bonus Plan
Two Thousand Twenty Five Bonus Plan [Member]
Two thousand twenty five bonus plan.
Proceeds from business combination, net of issuance costs paid.
Proceeds From Business Combination Net Of Issuance Costs Paid
Business Combination, net of issuance costs paid
Net cash contributions from Business Combination
Shares Authorized
Shares authorized
Shares authorized.
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Total comprehensive loss
Statement of Cash Flows [Abstract]
August 2023 Public Offering
August Two Thousand Twenty Three Public Offering [Member]
August two thousand twenty three public offering.
Stock Issued During Period, Value, New Issues
Issuance of common stock
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Schedule of Stock Option Activity
Equity [Text Block]
Stockholders' Equity
Earnings Per Share [Text Block]
Earnings (Loss) Per Share
Sec. 162(m) Wage Limitation, amount
Sec. 162(m) wage limitation.
Sec. 162(m) wage limitation
Cybersecurity Risk Management Processes Integrated [Text Block]
Net gain (loss)
Net loss attributable to common stockholders
Intrinsic value, balance at end of period
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Schedule of reconciliation of elements of business combination.
Schedule Of Reconciliation Of Elements Of Business Combination Table [Text Block]
Schedule of Reconciliation of Elements of Business Combination to Consolidated Statement of Cash Flows and Consolidated Statement of Redeemable Non-Controlling Interest and Stockholders' Equity
Operating Lease, Cost
Operating lease costs
Tax credit carryforward expiration beginning year.
Tax Credit Carryforward Expiration Beginning Year
Tax credit carryforward expiration beginning year
Less: Fair value of assumed common stock warrants
Fair value of assumed common stock warrants.
Fair Value Of Assumed Common Stock Warrants
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Expected dividends
Litigation Settlement, Amount Awarded to Other Party
Litigation potential settlement amount
Purchase Obligation
Minimum purchase commitments, Total
Minimum purchase commitments, Total
Operating outgoing cash flows - operating lease
Operating Lease, Payments
Intrinsic value, vested and expected to vest at end of period
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value
Assets [Abstract]
Assets
Income Tax Authority, Name [Axis]
Income Tax Authority, Name
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Risk-free interest rate
Construction in Progress [Member]
Construction in Progress
Increase (Decrease) in Prepaid Expense and Other Assets
Increase (Decrease) in Prepaid Expense and Other Assets, Total
Prepaid expenses and other current assets and other assets
Capital Contribution Under Collaboration Agreement - Related Party
Capital contribution under collaboration agreement - related party.
Capital contribution under collaboration agreement - related party
Finance lease liability payments net of reimbursements due year two.
Finance Lease Liability Payments Net Of Reimbursements Due Year Two
2027
Document Fiscal Year Focus
Document Fiscal Year Focus
Exercise Price Range [Domain]
Exercise Price Range
Series C convertible preferred stock.
Series C Convertible Preferred Stock [Member]
Series C Convertible Preferred Stock
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Investing activities
Accounts Payable, Current
Accounts payable
Accounts Payable, Current, Total
Interest expense
Interest Expense, Nonoperating
Interest Expense, Nonoperating, Total
Interest expense
Research and Development Expense [Member]
Research and Development
Accounting Standards Update 2019-12 [Member]
ASU 2019-12
Accounting Standards Update and Change in Accounting Principle [Abstract]
Tax Credit Carryforward, Description
Tax credit carryforward, description
Research Tax Credit Carryforward [Member]
Research Tax Credit Carryforward
Proceeds from issuance of Class A Common Stock pursuant to Legacy QuantumScape Series F Preferred Stock Purchase Agreement, net of issuance costs
Proceeds From Issuance Of Class A Common Stock Pursuant To Legacy Quantum Scape Series F Preferred Stock Purchase Agreement Net Of Issuance Costs
Proceeds from issuance of Class A Common Stock pursuant to Legacy QuantumScape Series F Preferred Stock Purchase Agreement, net of issuance costs
Insurance receivable
Insurance Receivable for Malpractice
Insurance Receivable for Malpractice, Total
Free standing convertible preferred stock warrants liability policy.
Free Standing Convertible Preferred Stock Warrants Liability Policy Policy [Text Block]
Free-Standing Convertible Preferred Stock Warrants Liability
ATM offering
At The Market Offering [Member]
At the market offering.
Purchase Obligation, to be Paid, Year One
Minimum purchase commitments, 2026
Schedule of Unrealized Loss on Investments [Table Text Block]
Summary of Additional Information Gross Unrealized Losses and Fair Value By Major Security For Marketable Securities
Noncontrolling Interest, Decrease from Deconsolidation
Dissolution of joint venture, Redeemable Non-Controlling interest
Accounting Standards Update 2020-06 [Member]
ASU 2020-06
Proceeds from Stock Options Exercised
Proceeds from exercise of stock options
Fair Value Disclosures [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Year One
2026
Schedule of earnings per share basic and diluted.
Schedule Of Earnings Per Share Basic And Diluted [Abstract]
Net Income (Loss) Available to Common Stockholders, Basic
Net loss attributable to common stockholders
Income Tax Examination, Description
Income tax examination, description
Subscription Agreement.
Subscription Agreement [Member]
Subscription Agreement
Lessee, Operating Lease, Liability, to be Paid, after Year Five
Thereafter
Share-Based Payment Arrangement [Abstract]
Income tax.
Income Tax [Line Items]
Income Tax [Line Items]
Assets, Fair Value Disclosure
Total fair value assets
Assets, Fair Value Disclosure, Total
Deferred Tax Liabilities, Intangible Assets
Intangibles
Sale of Stock [Axis]
Sale of Stock
Business combination and PIPE financing shares.
Business Combination And P I P E Financing Shares
Business Combination and PIPE Financing shares - Class A common stock
Schedule of Restricted Stock Units with Service Condition and Performance Stock Unit Activities
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
Net cash used in investing activities
Net cash (used in) provided by investing activities
Common Class A and Class B Shares.
Common Class A And Class B Shares [Member]
Common Class A and Class B Shares
Finance Lease, Weighted Average Remaining Lease Term
Weighted-average remaining lease term - finance lease (in years)
Title of 12(b) Security
Title of 12(b) Security
Deferred Tax Liabilities, Net [Abstract]
Deferred tax liabilities:
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Cancelled and 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
Weighted Average grant date fair value, Forfeited
Number of additional shareholder derivative actions filed
Number of Additional Shareholder Derivative Actions Filed
Number of additional shareholder derivative actions filed.
Money Market Funds [Member]
Money Market Fund
Money Market Funds
Related and Nonrelated Parties [Domain]
Related Party
Litigation Amount Accrued
Litigation amount accrued.
Litigation amount accrued
Income Tax Disclosure [Text Block]
Income Taxes
Debt Securities, Available-for-Sale, Allowance for Credit Loss
Allowance for credit losses
Debt Securities, Available-for-sale, Allowance for Credit Loss, Total
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance
Debt Securities, Available-for-sale, Allowance for Credit Loss, Ending Balance
Class of Warrant or Right [Line Items]
Class Of Warrant Or Right [Line Items]
PowerCo
PowerCo SE [Member]
PowerCo SE.
Summary of significant accounting policies.
Summary Of Significant Accounting Policies [Line Items]
Summary Of Significant Accounting Policies [Line Items]
Other liabilities
Other Liabilities, Noncurrent
Other liabilities
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total
Finance Lease, Right-of-Use Asset, after Accumulated Amortization
Right-of-use assets - finance lease
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]
Changes in operating assets and liabilities:
Litigation settlement, outstanding liability amount
Litigation Settlement, Outstanding Liability Amount
Litigation settlement, outstanding liability amount.
Property, Plant and Equipment [Table Text Block]
Schedule of Property and Equipment
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Outstanding at the end of the period (in dollars per share)
Outstanding at the beginning of the period (in dollars per share)
Weighted Average Exercise Price
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five
Fair Value, Due after one year and through five years
Income Tax Disclosure [Abstract]
Fair Value, Recurring and Nonrecurring [Table]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]
Business Combination [Text Block]
Business Combination
Unrecognized Tax Benefits
End of the year
Beginning of the year
Unrecognized tax benefits
Additional Paid-in Capital [Member]
Additional Paid-In Capital
Measurement Frequency [Domain]
Measurement Frequency
Statement of Income Location, Balance [Axis]
Income Statement Location
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date
Change in accounting principle, accounting standards update, adoption date
Trading Symbol
Trading Symbol
Prior to two thousand eighteen.
Prior To Two Thousand Eighteen [Member]
Prior to 2018
Related Party Transaction [Table]
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent, Total
Other nontaxable or nondeductible items, percent
Other, percent
Principal payment for finance lease
Principal payment for finance lease
Principal Payments for Finance Lease
Principal payment for finance lease.
Subsequent Event Type [Axis]
Accrued compensation and benefits
Employee-related Liabilities, Current
Employee-related Liabilities, Current, Total
$2.38
Exercise Price Range Two.
Exercise Price Range Two [Member]
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Financing activities
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term
Option term (in years)
Fair Value, Recurring [Member]
Recurring
Entity Ex Transition Period
Entity Ex Transition Period
Lessee, Operating Lease, Liability, to be Paid
Total
Accounting Standards Update 2016-13 [Member]
ASU 2016-13
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Less present value discount
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent
Research and development tax credits, percent
Research and development tax credit. percent
Equity Components [Axis]
Equity Components
Proceeds from issuance of preferred stock and business combination.
Proceeds From Issuance Of Preferred Stock And Business Combination
Proceed from Series F preferred stock financings and business combination
Previously recognized expense for the stock option
Deferred Compensation Arrangement with Individual, Allocated Share-Based Compensation Expense
Assumed Public Common Stock Warrants Member
Assumed Public Common Stock Warrants [Member]
Assumed Public Common Stock Warrants
Debt Securities, Held-to-Maturity [Table Text Block]
Summary of Estimated Amortized Cost and Fair Value of Available-for-Sale Securities by Contractual Maturity
Equity Component [Domain]
Equity Component
Asset Class [Axis]
Asset Class
Gain (loss) non-cash change in fair value of assumed common stock warrant liabilities
Change in fair value of assumed common stock warrant liabilities.
Less: Change in fair value of assumed common stock warrant liabilities
Change in fair value of assumed common stock warrant liabilities
Change in fair value of assumed common stock warrant liabilities
Shares issued under At-The-Market Offering, net of issuance costs
Stock Issued During Period, Value, At-The-Market Offering, Net of Issuance Costs
Stock issued during period, value, at-the-market offering, net of issuance costs.
Number of marketable securities in an unrealized loss positions
Number of marketable securities.
Number Of Marketable Securities
Document Annual Report
Document Annual Report
Business Combination [Axis]
Business Acquisition
Joint venture and non controlling interest.
Joint Venture And Non Controlling Interest [Table]
Joint Venture And Non Controlling Interest [Table]
Share Based Compensation Arrangement by Share Based Payment Award, Options, Waived, Number of Shares
Share based compensation arrangement by share based payment award, options, waived, number of shares.
Number of shares waived stock options
Machinery and Equipment [Member]
Machinery and Equipment
Common Stock, Voting Rights
Number of votes each shareholder entitled
Common stock voting rights, description
Schedule of earnings per share basic and diluted.
Schedule Of Earnings Per Share Basic And Diluted [Table]
Schedule Of Earnings Per Share Basic And Diluted [Table]
Corporate Joint Venture [Member]
Joint Venture
QSV
Maximum [Member]
Maximum [Member]
Maximum
Liabilities, Fair Value Disclosure
Total fair value Liabilities
Liabilities, Fair Value Disclosure, Total
$6.23
Exercise Price Range Three.
Exercise Price Range Three [Member]
Statistical Measurement [Axis]
Statistical Measurement
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Exercised (in dollars per share)
Prepaid Expense, Current
Prepaid expense
Prepaid Expense, Current, Total
Number Of Votes Each Shareholder Entitled
Number of votes each shareholder entitled
Common Stock, Value, Issued
Common stock - $0.0001 par value
Common Stock, Value, Issued, Total
Common Stock, Value, Issued, Beginning Balance
Common Stock, Value, Issued, Ending Balance
Common stock - $0.0001 par value; 1,250,000 shares authorized (1,000,000 Class A and 250,000 Class B); 570,128 Class A and 37,502 Class B shares issued and outstanding as of December 31, 2025, 487,883 Class A and 54,666 Class B shares issued and outstanding as of December 31, 2024
Finance Lease, Principal Payments
Financing outgoing cash flows - finance lease
Consolidation, Policy [Policy Text Block]
Principles of Consolidation
Joint venture agreement.
Joint Venture Agreement [Member]
JVA
Deferred Tax Assets, Operating Loss Carryforwards
Net operating losses
Deferred Tax Assets, Operating Loss Carryforwards, Total
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]
Tax Credit Carryforward [Axis]
Tax Credit Carryforward
Tranche four.
Tranche Four [Member]
Tranche Four
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Impairment of Long-Lived Assets
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Other Nonoperating Income (Expense) [Abstract]
Other income (expense):
Entity Public Float
Entity Public Float
Volatility
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate
Preferred Stock, Shares Authorized
Preferred stock, authorized
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Total
Less: Comprehensive (loss) income attributable to non-controlling interest
Summary of significant accounting policies.
Summary Of Significant Accounting Policies [Table]
Summary Of Significant Accounting Policies [Table]
Private placement warrants and working capital warrants Commencing September 28, 2021.
Private Placement Warrants And Working Capital Warrants Commencing September Twenty Eight Twenty Twenty One [Member]
Private Placement and Working Capital Warrants Commencing September 28, 2021
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss, Total
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss
Total gross unrealized loss
Related Party Transaction [Line Items]
Schedule Of Number Of Shares Of Common Stock Issued Under Business Combination Table [Text Block]
Schedule of number of shares of common stock issued under business combination.
Schedule of Number of Shares of Common Stock Issued Immediately Following Consummation of Business Combination
Entity Registrant Name
Entity Registrant Name
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Interest or penalties related to unrecognized tax benefits.
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax
Gross Unrealized Loss
Entity Voluntary Filers
Entity Voluntary Filers
Other Nonoperating Income (Expense)
Total other income (loss)
Other income (expense)
Dissolution of joint venture in Redeemable Non-controlling Interest
Dissolution of joint venture in Redeemable Non-controlling Interest.
Dissolution of joint venture
Subsequent Events [Abstract]
Cybersecurity Risk Management Positions or Committees Responsible [Flag]
Shares Granted, Value, Share-Based Payment Arrangement, Forfeited
Stock-based compensation award cancelled
Income Tax Expense (Benefit)
Income tax expense (benefit)
Income Tax Expense (Benefit), Total
Provision for income taxes
Income tax (provision) benefit
Measurement Frequency [Axis]
Measurement Frequency
Amendment Description
Amendment Description
Triple point capital two warrants.
Triple Point Capital Two Warrants [Member]
TPC2 Warrants
Proceeds from Issuance of Common Stock
Proceeds from common stock
Proceeds from issuance of common stock
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Concentrations of Credit Risk
Redeemable warrants.
Redeemable Warrants [Member]
Redeemable Warrants
Liability Class [Axis]
Liability Class
Area of rentable space lease.
Area Of Rentable Space Lease
Area of rentable space lease
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total
Payments to Acquire Property, Plant, and Equipment
Payments to Acquire Property, Plant, and Equipment, Total
Purchases of property and equipment
Other
Payment for (Proceeds from) Other Investing Activity
Number of Units, Granted
Stock units granted
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period
Assets
Total assets
Total assets
Property, Plant and Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
Weighted Average Remaining Contractual Term (Years), vested and exercisable
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Income Statement [Abstract]
Finance Lease, Interest Payment on Liability
Operating outgoing cash flows - finance lease
Fair Value of Financial Instruments, Policy [Policy Text Block]
Fair Value Measurement
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
Decrease—prior year positions
Share-Based Payment Arrangement [Policy Text Block]
Stock-Based Compensation
Deferred Income Tax Expense (Benefit), Total
Deferred Income Tax Expense (Benefit)
Deferred income tax expense (benefit)
Shares purchase price.
Shares Purchase Price
Aggregate purchase price
Finance lease liability payments net of reimbursements due next twelve months.
Finance Lease Liability Payments Net Of Reimbursements Due Next Twelve Months
2026
Volkswagen Group of America, Inc.
Volkswagen Group Of America Incorporation [Member]
VWGoA
Number of shares sold during period
Issuance of common stock, Shares
Number of Units, Vested
Number of Units, Vested
Number of Restricted Stock Units, Vested
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period
Business Combination [Abstract]
Earnings Per Share, Diluted, Total
Earnings Per Share, Diluted
Net loss per share attributable to Class A and Class B Common stockholders - Diluted
Net loss per share - Diluted
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Financial Information with Respect to Single Operating Segment
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Title and Position [Domain]
Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration]
City Area Code
City Area Code
Auditor Name
Share based compensation arrangement by share based payment award options exercise price range.
Share Based Compensation Arrangement By Share Based Payment Award Options Exercise Price Range
Range of Exercise Price per Share
Finance Lease, Liability, Noncurrent
Finance lease liability, long-term
Deferred Tax Assets, Tax Credit Carryforwards
Tax credits
Deferred Tax Assets, Tax Credit Carryforwards, Total
Counterparty Name [Domain]
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount
Research and development tax credits
Research and development tax credits
Variable Lease, Cost
Variable lease costs
Weighted-average remaining lease term - operating lease (in years)
Operating Lease, Weighted Average Remaining Lease Term
Lease Expiration Date
Lease expiration date
Lease, Cost
Total lease expense
Property, Plant and Equipment, Net
Property and equipment, net
Property and equipment, net
Property, Plant and Equipment, Net, Beginning Balance
Property, Plant and Equipment, Net, Ending Balance
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability
Right-of-use assets obtained in exchange for new finance lease liabilities
Extinguishment of liability under collaboration agreement - related party
Extinguishment of Liability Under Collaboration Agreement To Related Party
Extinguishment of liability under collaboration agreement to related party.
Proceeds from Exercise of Stock Options and Employee Stock Purchase Plan
Proceeds from Exercise of Stock Options and Employee Stock Purchase Plan
Proceeds from exercise of stock options and employee stock purchase plan
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation
Cash, cash equivalents and restricted cash at end of period
Cash, cash equivalents and restricted cash at beginning of period
Total cash, cash equivalents and restricted cash
Operating Income (Loss)
Loss from operations
Loss from operations
Retained Earnings [Member]
Accumulated Deficit
Sec. 162(m) Wage Limitation
Sec. 162(m) wage limitation.
Sec. 162(m) wage limitation, percent
Share-Based Payment Arrangement, Noncash Expense
Stock-based compensation expense
Share-based Payment Arrangement, Noncash Expense, Total
Stock based compensation
Payments of Stock Issuance Costs
Stock issuance costs
Common stock issuance costs paid
Business combination.
Business Combination [Table]
Business Combination [Table]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months
Fair value less than 12 consecutive months
Weighted-average discount rate - operating lease
Operating Lease, Weighted Average Discount Rate, Percent
Operating Lease, Liability, Noncurrent
Operating lease liability, long-term
Fair Value, Inputs, Level 1 [Member]
Level 1
Class of Stock [Line Items]
Class of Stock [Line Items]
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Net cash provided by financing activities
Net cash provided by financing activities
Lease, Cost [Table Text Block]
Summary of Lease Related Expense
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]
Change in accounting principle, accounting standards update, adopted
Auditor Location
Document and entity information.
Document And Entity Information [Line Items]
Document And Entity Information [Line Items]
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Summary of Potential Common Stock Outstanding Excluded from Computation of Diluted Net Loss Per Share
Income Tax Jurisdiction [Domain]
Income Tax Authority
Debt Securities, Available-for-Sale [Table]
Debt Securities Available For Sale [Table]
Entity Interactive Data Current
Entity Interactive Data Current
Common stock redemption shares.
Common Stock Redemption Shares
Less: redemption of Kensington shares
Statement of Income Location, Balance [Domain]
Income Statement Location
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Operating activities
Furniture and Fixtures [Member]
Furniture and Fixtures
Estimated useful lives of assets
Lessee, Operating Lease And Finance Lease, Description
Lessee, operating lease and finance lease, description.
Accounting Standards Update and Change in Accounting Principle [Text Block]
Recent Accounting Pronouncements
Accretion (Amortization) of Discounts and Premiums, Investments
Accretion of discounts on marketable securities
Increase (Decrease) in Other Noncurrent Liabilities
Other long-term liabilities
Other liabilities
Convertible Preferred Stock Warrant Liabilities.
Convertible Preferred Stock Warrant Liabilities [Member]
Convertible Preferred Stock Warrant Liabilities
Entity Tax Identification Number
Entity Tax Identification Number
Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]
Summary of Major Security Type Assets That Measured at Fair Value on Recurring Basis
Other Commitments, Description
Other commitments, description
Redeemable Noncontrolling Interest [Table Text Block]
Schedule of Change in Redeemable Non-Controlling Interest
Income Tax Authority, Name [Domain]
Income Tax Authority, Name
Local Phone Number
Local Phone Number
Net assets assumed from business combination.
Net Assets Assumed From Business Combination
Net assets assumed from Business Combination
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding
Number of Options Outstanding
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding, Beginning Balance
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding, Ending Balance
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount
Unrecognized stock-based compensation unvested stock options
Weighted-average shares used in computing net loss per share of common stock
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Denominator:
Auditor Opinion [Text Block]
Leasehold Improvements
The adjustment to reduce the value of leasehold improvements associated with existing agreement that's being terminated. This expense is charged when the estimates of future profits generated by the leased property are reduced.
Impairment charge related to leasehold improvements
Business combination transaction costs, accrued but not yet paid.
Business Combination Transaction Costs Accrued But Not Yet Paid
Business Combination transaction costs, accrued but not paid
Joint venture and non-controlling interest.
Joint Venture And Non Controlling Interest [Abstract]
Accounting Standards Update 2023-01 [Member]
ASU 2023-01
Accounting Policies [Abstract]
Lessee Finance Lease Extension Of Lease Term Month And Year
Lessee finance lease extension of lease term month and year.
Finance lease extension expiration, month and year
Amount Reclassified from Accrued Compensation as Non-Cash Financing Activity
Amount reclassified from Accrued compensation as non-cash financing activity.
Amount reclassified from Accrued compensation as non-cash financing activity
Add: Non-cash fair value of assumed common stock warrants
Non cash fair value of assumed common stock warrants.
Non Cash Fair Value Of Assumed Common Stock Warrants
Lessee, Operating Lease, Liability, to be Paid, Year Four
2029
Change in fair value of convertible preferred stock tranche liabilities.
Change In Fair Value Of Convertible Preferred Stock Tranche Liabilities
Change in fair value of convertible preferred stock tranche liabilities
Change in fair value of Series F convertible preferred stock tranche liabilities
Class of Stock [Domain]
Class of Stock
Commercial Paper [Member]
Commercial Paper
Labor and Related Expense
Personnel costs
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Expected to be recognized estimated weighted average period
Accrued professional services
Accrued Professional Fees, Current
Public Warrants Redemption Date August Twenty Four Twenty Twenty One [Member]
Public warrants redemption date August twenty four twenty twenty one.
Public Warrants Redemption August 24, 2021
Stock, Class of Stock [Table]
Schedule Of Stock By Class [Table]
Restricted stock units granted and vested
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Granted and Vested
Share based compensation arrangement by share based payment award equity instruments other than options granted and vested.
Entity Emerging Growth Company
Entity Emerging Growth Company
Weighted Average Remaining Contractual Term (Years), vested and expected to vest
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term
Tax Credit Carryforward, Name [Domain]
Tax Credit Carryforward, Name