75000 - Document - Document and Entity Information
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75010 - Statement - Condensed Consolidated Balance Sheets (Unaudited)
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75020 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)
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75030 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited)
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75040 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) (Parenthetical)
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75050 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Unaudited)
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75060 - Statement - Condensed Consolidated Statements of Redeemable Non-Controlling Interest and Stockholders' Equity (Unaudited) (Parenthetical)
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75070 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
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75080 - Statement - Cash, Cash Equivalents and Restricted Cash by Category
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995455 - Disclosure - Nature of Business
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995465 - Disclosure - Summary of Significant Accounting Policies
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995475 - Disclosure - Recent Accounting Pronouncements
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995485 - Disclosure - Fair Value Measurement
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995495 - Disclosure - Balance Sheet Components
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995505 - Disclosure - Leases
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995515 - Disclosure - Commitments and Contingencies
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995525 - Disclosure - Assumed Common Stock Warrants
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995535 - Disclosure - Stockholders' Equity
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995545 - Disclosure - Net Loss Per Share
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995555 - Disclosure - Related Party Transactions
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995565 - Disclosure - Joint Venture and Redeemable Non-Controlling Interest
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995575 - Disclosure - Summary of Significant Accounting Policies (Policies)
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995585 - Disclosure - Summary of Significant Accounting Policies (Tables)
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995595 - Disclosure - Fair Value Measurement (Tables)
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995605 - Disclosure - Balance Sheet Components (Tables)
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995615 - Disclosure - Leases (Tables)
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995625 - Disclosure - Commitments and Contingencies (Tables)
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995635 - Disclosure - Stockholders' Equity (Tables)
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995645 - Disclosure - Net Loss Per Share (Tables)
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995655 - Disclosure - Joint Venture and Redeemable Non-Controlling Interest (Tables)
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995665 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details)
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995675 - Disclosure - Summary of Significant Accounting Policies - Summary of Property and Equipment and Their Estimated Useful Lives (Details)
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995685 - Disclosure - Recent Accounting Pronouncements - Additional Information (Details)
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995695 - Disclosure - Fair Value Measurement - Summary of Financial Assets Subject to Fair Value Measurements on Recurring Basis (Details)
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995705 - Disclosure - Fair Value Measurement - Summary of Financial Assets Subject to Fair Value Measurements on Recurring Basis (Parenthetical) (Details)
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995715 - Disclosure - Fair Value Measurement - Additional Information (Details)
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995725 - Disclosure - Fair Value Measurement - Summary of Major Security Type Assets That Measured at Fair Value on Recurring Basis (Details)
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995735 - Disclosure - Fair Value Measurement - Summary of Gross Unrealized Losses and Fair Value for Marketable Securities (Details)
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995745 - Disclosure - Fair Value Measurement - Summary of Gross Unrealized Losses and Fair Value for Marketable Securities (Details) 2
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995755 - 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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995765 - Disclosure - Balance Sheet Components - Schedule of Property and Equipment (Details)
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995775 - Disclosure - Balance Sheet Components - Additional Information (Details)
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995785 - Disclosure - Balance Sheet Components - Schedule of Accrued Liabilities (Details)
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995795 - Disclosure - Balance Sheet Components - Schedule of Other Liabilities (Details)
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995805 - Disclosure - Balance Sheet Components - Schedule of Other Liabilities (Details) 2
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995815 - Disclosure - Leases - Additional Information (Details)
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995825 - Disclosure - Leases - Summary of Lease Related Expense (Details)
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995835 - Disclosure - Leases - Summary of Supplemental Cash Flow Information Related to Leases (Details)
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995845 - Disclosure - Leases - Summary of Additional Information for Lease (Details)
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995855 - Disclosure - Leases - Summary of Future Minimum Payments (Details)
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995865 - Disclosure - Leases - Summary of Future Minimum Payments (Details) 2
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995875 - Disclosure - Commitments and Contingencies - Additional Information (Details)
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995885 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Purchase Commitments (Details)
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995895 - Disclosure - Assumed Common Stock Warrants - Additional Information (Details)
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995905 - Disclosure - Stockholders' Equity - Additional Information (Details)
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995915 - Disclosure - Stockholders' Equity - Schedule of Stock Option Activity (Details)
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995925 - Disclosure - Stockholders' Equity - Schedule of Stock Option Activity (Parenthetical) (Details)
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995935 - Disclosure - Stockholders' Equity - Summary of Vesting Tranches (Details)
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995945 - Disclosure - Stockholders' Equity - Schedule of Restricted Stock Units with Service Condition and Performance Stock Unit Activities (Details)
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995955 - Disclosure - Stockholders Equity - Schedule of Stock-based Compensation Expense (Details)
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995965 - Disclosure - Net Loss Per Share - Summary of Basic and Diluted Loss per Share of Common Stock (Details)
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995975 - 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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995985 - 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
Finance Lease, Liability, Total
Finance Lease, Liability
Lease liabilities
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Preferred Stock, Shares Issued, Total
Preferred Stock, Shares Issued
Preferred stock, shares issued
Share based compensation award tranche four.
Share Based Compensation Award Tranche Four [Member]
Tranche 4
Finance Lease Liability Payments Net Of Reimbursements Due Year Four
Finance lease liability payments net of reimbursements due year four.
2030
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
U.S. Government and Agency Securities
U.S. Government and Agency Securities
US Government and Agency Securities
Operating Expenses [Abstract]
Operating expenses:
Level 2
Fair Value, Inputs, Level 2 [Member]
Mohit Singh [Member]
Mohit singh.
Commitments and Contingencies Disclosure [Text Block]
Commitments and Contingencies
Common Stock, Shares Authorized
Common stock, authorized
Share-Based Payment Arrangement, Tranche Three [Member]
Tranche 3
Document Fiscal Period Focus
Document Fiscal Period Focus
Entity Shell Company
Entity Shell Company
Other
Other Accrued Liabilities, Current
Private placement warrants.
Private Placement Warrants [Member]
Private Placement Warrants
Segments
Segment Reporting, Policy [Policy Text Block]
Cash and Cash Equivalents, at Carrying Value, Ending Balance
Cash and Cash Equivalents, at Carrying Value, Beginning Balance
Cash and Cash Equivalents, at Carrying Value, Total
Cash and Cash Equivalent
Cash and cash equivalents
Cash and cash equivalents
Litigation Settlement, Fee Expense
Litigation settlement legal fees
Lease Termination Agreement Member
Lease Termination Agreement.
Lease Termination Agreement
Common Stock, Shares, Issued, Total
Common Stock, Shares, Issued
Common stock, issued
Lessee, Operating Lease, Description
Estimated useful lives of assets
Asset Class [Domain]
Asset Class
Statement [Table]
Statement [Table]
Restricted Cash, Noncurrent
Other assets
Restricted cash
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Right-of-use assets obtained in exchange for new operating lease liabilities
US government money market fund and marketable securities.
U S Government Money Market Fund And Marketable Securities [Member]
US Government Money Market Fund and Marketable Securities
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five
Amortized Cost, Due after one year and through five years
Finance lease liability payments net of reimbursements remainder of fiscal year.
Finance Lease Liability Payments Net Of Reimbursements Remainder Of Fiscal Year
2026 (remaining nine months)
Statement [Line Items]
Statement [Line Items]
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
Selling, General and Administrative Expenses, Policy [Policy Text Block]
General and Administrative Expenses
Temporary Equity, Net Income
Net income (loss), Redeemable Non-Controlling interest
Kevin Hettrich [Member]
Kevin Hettrich.
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, Total
Payments to Acquire Marketable Securities
Purchases of marketable securities
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Vested and exercisable (in dollars per share)
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
Litigation Settlement Accrual Partially Offset Included In Prepaid Expenses And Other Current Assets
Litigation Settlement Accrual Partially Offset Included In Prepaid Expenses And Other Current Assets
Litigation settlement accrual partially offset included in prepaid expenses and other current assets
Other Noncash Income (Expense), Total
Other Noncash Income (Expense)
Other
Options
Convertible Debt Securities [Member]
Corporate Notes and Bonds
Investment Income Interest, Total
Investment Income, Interest
Interest income
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
Additional Paid in Capital, Common Stock, Ending Balance
Additional Paid in Capital, Common Stock, Beginning Balance
Additional Paid in Capital, Common Stock
Purchase Obligation, to be Paid, Remainder of Fiscal Year
Minimum purchase commitments, 2026 (remaining nine months)
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]
Legacy QuantumScape Series F Preferred Stock Purchase Agreement.
Legacy Quantum Scape Series F Preferred Stock Purchase Agreement [Member]
Legacy QuantumScape Series F Preferred Stock Purchase Agreement
Vesting [Domain]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross
Granted stock option
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Summary of Basic and Diluted Earnings (Loss) per Share of Common Stock
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 - Basic
Basic net loss per share
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)
Number of shares subject to options outstanding
Impairment of Leasehold
Impairment charge related to leasehold improvements
Liabilities, Current
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:
Schedule of Future Minimum Purchase Commitments
Long-Term Purchase Commitment [Table Text Block]
Lessee, Operating Lease, Liability, to be Paid, Year Five
2031
Purchase Obligation, to be Paid, Year Two
Minimum purchase commitments, 2028
Accounting Standards Update [Axis]
Accounting Standards Update
Equity, Attributable to Parent [Abstract]
Stockholders’ equity
Entity Small Business
Entity Small Business
Retained Earnings (Accumulated Deficit), Ending Balance
Retained Earnings (Accumulated Deficit), Beginning Balance
Retained Earnings (Accumulated Deficit), Total
Retained Earnings (Accumulated Deficit)
Accumulated deficit
Nature of Operations [Text Block]
Nature of Business
Dr. Tim Holme [Member]
Dr. Tim Holme [Member]
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
Public warrants.
Public Warrants [Member]
Public Warrants
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Lease Contractual Term [Axis]
Leases [Abstract]
Common Class A [Member]
Class A Common Stock
Lessee, Lease, Description [Line Items]
Amendment Flag
Amendment Flag
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 5
Finance Lease, Interest Expense
Interest on lease liabilities
Liabilities and Equity [Abstract]
Liabilities and stockholders' equity
Entity Address, Postal Zip Code
Entity Address Postal Zip Code
Percentage of related party voting interest
Percentage of Related Party Voting Interests
Percentage of related party voting interests.
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
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]
Lessee, Operating Lease, Liability, to be Paid, Year Three
2029
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Accumulated depreciation and amortization
Debt Securities, Available-for-Sale [Line Items]
Schedule of Available for Sale Securities [Line Items]
Debt Securities, Available-for-sale [Line Items]
Escrow Deposit
Paid to escrow deposits
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, value
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
Fair Value Hierarchy and NAV [Axis]
Level 2
Earnings Per Share [Abstract]
Net income (loss) per share of common stock attributable to common stockholders
Income Tax, Policy [Policy Text Block]
Income Taxes
Loss Contingency Accrual
Loss Contingency Accrual, Ending Balance
Loss Contingency Accrual, Beginning Balance
Finance lease liability payments net of reimbursements due after year five.
Finance Lease Liability Payments Net Of Reimbursements Due After Year Five
Thereafter
Supplemental Cash Flow Information [Abstract]
Supplemental disclosure:
Finance lease liability payments net of reimbursements due year five.
Finance Lease Liability Payments Net Of Reimbursements Due Year Five
2031
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
Prepaid Expenses And Other Current Assets [Table Text Block]
Prepaid Expenses And Other Current Assets [Table Text Block]
Prepaid Expenses and Other Current Assets
Class of Warrant or Right [Axis]
Class of Warrant or Right
Document Type
Document Type
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]
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation
Net (decrease) increase in cash, cash equivalents and restricted cash
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Antidilutive
Balance Sheet Related Disclosures [Abstract]
Joint venture and non controlling interest.
Joint Venture And Non Controlling Interest [Text Block]
Joint Venture and Redeemable Non-Controlling Interest
Impairment of Long-Lived Assets to be Disposed of
Write-off of property and equipment
Write-off of fixed assets
Common Stock, Par or Stated Value Per Share
Common stock, par value
Accounting Standards Update [Domain]
Accounting Standards Update
Share-Based Payment Arrangement, Tranche One [Member]
Tranche 1
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term (Years)
Weighted average remaining contractual term of stock options
Asset Retirement Obligation, Current
Asset retirement obligation
Debt Securities, Available-for-Sale, Amortized Cost
Amortized Cost
Fair Value
Debt Securities, Available-for-sale, Total
Debt Securities, Available-for-Sale
Gain (Loss) on Termination of Lease
Lease termination loss
Exercise of stock options, Shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period
Exercised (in shares)
Exercise of stock options and employee stock purchase plan, Shares
Marketable Securities, Total
Marketable Securities
Marketable securities
Accrued Liabilities, Current
Accrued liabilities
Accrued liabilities
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
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
Document Quarterly Report
Document Quarterly Report
Lessee operating lease expiration year.
Lessee Operating Lease Expiration Year
Operating lease expiration, year
Entity Address, State or Province
Entity Address, State or Province
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number
Number of Units, Beginning Balance
Number of Units, Ending Balance
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
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, Beginning Balance
Preferred Stock, Shares Outstanding, Ending Balance
Preferred Stock, Shares Outstanding
Preferred stock, outstanding
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, 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, Total
Marketable Securities, Current
Marketable securities
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Schedule of Stock-based Compensation Expense
Stock Issued During Period, Value, Stock Options Exercised
Exercise of stock options
Finance leases costs.
Finance Leases Costs [Abstract]
Finance lease costs:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income (loss):
Performance Shares [Member]
Performance Stock Unit
PSUs
Proceeds from Sale and Maturity of Marketable Securities
Proceeds from maturities of marketable securities
Proceeds from Sale and Maturity of Marketable Securities, Total
Estimated Litigation Liability, Current
Litigation-related accrual
Marketable Securities, Policy [Policy Text Block]
Marketable Securities
Property, Plant and Equipment [Abstract]
Other Assets, Noncurrent, Total
Other Assets, Noncurrent
Other assets
Lessee, Finance Lease, Existence of Option to Extend [true false]
Finance lease, existence of option to extend
Antidilutive Securities [Axis]
Antidilutive Securities
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period
Expired (in shares)
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
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Intrinsic value, vested and exercisable at end of period
Proceeds from Sale of Debt Securities, Available-for-Sale
Proceeds from sale of available-for sale marketable securities
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
Lessee, Finance Lease, Option to Extend
Finance lease, option to extend
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Loss
Preferred Stock, Value, Issued, Ending Balance
Preferred Stock, Value, Issued, Beginning Balance
Preferred Stock, Value, Issued, Total
Preferred Stock, Value, Issued
Preferred stock- $0.0001 par value; 100,000 shares authorized, none issued and outstanding as of March 31, 2026 and December 31, 2025
Business combination exchange ratio.
Business Combination Exchange Ratio
Business combination exchange ratio
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
Current assets
Assets, Current [Abstract]
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
Number of shareholder derivative suit filed.
Number Of Shareholder Derivative Suit Filed
Number of shareholder derivative suit filed
Number of tranches considered probable.
Number of Tranches Considered Probable
Number of tranches considered probable
Liabilities, Current [Abstract]
Current liabilities
Related Party Transactions [Abstract]
Purchase Obligation, to be Paid, Year Three
Minimum purchase commitments, 2029
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
Sublease income
Sublease Income
Sublease income
Lessee, Operating Lease, Renewal Term
Operating lease, renewal term
Commitments and Contingencies
Commitment and contingencies (see Note 7)
Leases
Lessee, Leases [Policy Text Block]
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
Operating lease liability and other liabilities
Increase Decrease in Operating Lease Liability and Other Noncurrent Liabilities
Increase decrease in operating lease liability and other noncurrent liabilities.
Operating Lease, Liability, Total
Operating Lease, Liability
Lease liabilities
Lessee finance leases and operating leases.
Lessee Finance Leases And Operating Leases [Text Block]
Leases
Percentage of joint venture holders voting interest.
Percentage Of Joint Venture Holders Voting Interest
Percentage of joint venture holders voting interest
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, short-term
Finance Lease, Liability, Current
Lessee, Lease, Description [Table]
Finance Lease, Weighted Average Discount Rate, Percent
Weighted-average discount rate - finance lease
Capital Expenditures Incurred but Not yet Paid
Purchases of property and equipment, not yet paid
Net loss
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Net loss
Net loss
Lease Contractual Term [Domain]
Weighted Average Number of Shares Outstanding, Basic, Total
Weighted Average Number of Shares Outstanding, Basic
Weighted-average common shares outstanding - Basic
Basic weighted-average common shares outstanding
Scenario [Axis]
Finance lease liability payments net of reimbursements due.
Finance Lease Liability Payments Net Of Reimbursements Due
Total
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value
Stock option exercisable, aggregate intrinsic value
Summary of vesting tranches.
Summary Of Vesting Tranches [Table Text Block]
Summary of Vesting Tranches
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
Gross unrealized loss 12 consecutive months or longer
Long-Lived Tangible Asset [Domain]
Long-Lived Tangible Asset
Number of tranches
Number of tranches.
Related Party Transactions Disclosure [Text Block]
Related Party Transactions
APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
Stock-based compensation
Equity, Attributable to Parent
Ending balance
Beginning balance
Total stockholders’ equity
Assumed Common Stock Warrants Liability
Assumed common stock warrants liability.
Assumed Common Stock Warrants Liability Policy [Text Block]
Preferred Stock, Par or Stated Value Per Share
Preferred stock, par value
Basis of Accounting, Policy [Policy Text Block]
Basis of Presentation
Number of finance lease renewal options.
Number Of Finance Lease Renewal Options
Number of finance lease renewal options
Statement of Stockholders' Equity [Abstract]
Share-Based Payment Arrangement, Tranche Two [Member]
Tranche 2
Use of Estimates, Policy [Policy Text Block]
Use of Estimates
Leasehold Improvements [Member]
Leasehold Improvements
ASU 2023-05
Accounting Standards Update 2023-05 [Member]
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
Warrants and Rights Note Disclosure [Abstract]
Schedule of Accrued Liabilities
Schedule of Accrued Liabilities [Table Text Block]
Loss Contingency, Damages Awarded, Value
Gross settlement amount
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
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
Rule 10b5-1 Trading Plan [Member]
Rule 10b5-1 Trading Plan.
Securities Class Action Litigation Settlement Amount Accrued
Securities Class Action Litigation Settlement Amount Accrued
Securities class action litigation settlement amount accrued
Class of Warrant or Right [Table]
Class Of Warrant Or Right [Table]
Property, Plant and Equipment, Policy [Policy Text Block]
Property and Equipment
Entity Address, City or Town
Entity Address, City or Town
Operating lease.
Operating Lease [Abstract]
Operating lease
Number of Reportable Segments
Number of reportable segment
Security Exchange Name
Security Exchange Name
Mohit Singh Trading Arrangement Sale Of Class A Common Stock [Member]
Mohit singh trading arrangement sale of class a common stock .
Redeemable Noncontrolling Interest, Equity, Carrying Amount, Total
Redeemable Noncontrolling Interest, Equity, Carrying Amount
Redeemable Non-Controlling, Ending balance
Redeemable Non-Controlling, Beginning balance
Redeemable non-controlling interest
Property, Plant and Equipment, Gross, Ending Balance
Property, Plant and Equipment, Gross, Beginning Balance
Property, Plant and Equipment, Gross, Total
Property, Plant and Equipment, Gross
Property and equipment, gross
Counterparty Name [Axis]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
Loss before income taxes
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
Stockholders' Equity Note [Abstract]
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
Warrants exercise price per share
Total current assets
Assets, Current
Share-Based Payment Arrangement, Expense
Total stock-based compensation expense
Stock-based compensation expense
Document Period End Date
Document Period End Date
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
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.
Statement of Financial Position [Abstract]
Restricted Stock Units (RSUs) [Member]
Restricted Stock Unit
RSUs
Antidilutive Security, Excluded EPS Calculation [Table]
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]
Vesting [Axis]
Class of Stock [Axis]
Class of Stock
Shares Issued Upon Vesting Of Restricted Stock Units
Exercise of stock options, Shares
Shares issued upon vesting of restricted stock units.
Shares issued upon vesting of restricted stock units, shares
Current Income Tax Expense (Benefit), Total
Current Income Tax Expense (Benefit)
Current income tax expense (benefit)
Finance lease liability payments net of reimbursements due year three.
Finance Lease Liability Payments Net Of Reimbursements Due Year Three
2029
Liabilities
Total liabilities
Financial Instruments [Domain]
Financial Instruments
Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block]
Summary of Financial Assets Subject to Fair Value Measurements on Recurring Basis
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
Lessee, Finance Lease, Renewal Term
Finance lease, renewal term
Asset retirement obligation
Asset Retirement Obligations, Noncurrent
Asset Retirement Obligations, Noncurrent, Total
Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One
Fair Value, Due within one year
Lessee, Operating Lease, Liability, to be Paid, Year Two
2028
Restricted Cash, Total
Restricted Cash
Restricted cash
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
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Gross unrealized loss less than 12 consecutive months
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 attributable to non-controlling interest, tax
Weighted Average Number of Shares Outstanding, Diluted
Weighted-average common shares outstanding - Diluted
Weighted average Class A and Class B Common Stock outstanding - Diluted
Diluted weighted-average common shares outstanding
Securities Act File Number
Entity File Number
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
Unrealized gain on marketable securities
Unrealized loss on marketable securities
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax, Total
Unrealized loss on marketable securities
Cover [Abstract]
Purchase Obligation, to be Paid, Year Five
Minimum purchase commitments, 2031
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
Prepaid expenses and other current assets
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period
Number of Units, Forfeited
Supplemental Balance Sheet Disclosures [Text Block]
Balance Sheet Components
Settlement And Applicable Legal Fees Net Of Our Insurance Receivable
Settlement And Applicable Legal Fees Net Of Our Insurance Receivable
Settlement and applicable legal fees net of our insurance receivable
Related Party Payment Received
Related party payments received.
Payments received
Scenario [Domain]
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
Professional services and legal contingency
Professional services and legal contingency.
Professional services and legal contingency
General and Administrative Expense, Total
General and Administrative Expense
General and administrative
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
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)
Property, Plant and Equipment, Useful Life
Estimated useful lives of assets
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]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period
Options vesting period
Vesting period
Extraordinary performance award program.
Extraordinary Performance Award Program [Member]
EPA
Potential funding contribution amount
Potential Funding Contribution Amount
Potential funding contribution amount.
Summary of Property and Equipment and Their Estimated Useful Lives of Assets
Schedule Of Estimated Useful Lives Of Assets [Table Text Block]
Schedule of 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 Target
Stock price targets
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount
Unrecognized stock-based compensation expense
Common Stock, Shares, Outstanding, Ending Balance
Common Stock, Shares, Outstanding, Beginning Balance
Common Stock, Shares, Outstanding
Common stock, outstanding
Operating Lease, Liability, Current
Operating lease liability, short-term
Depreciation, Depletion and Amortization, Total
Depreciation, Depletion and Amortization
Depreciation and amortization
Document Transition Report
Document Transition Report
Short-term Investments, Total
Short-Term Investments
Investment securities
Operating Expenses
Total operating expenses
Accrued Liabilities, Current [Abstract]
Research and Development Expense, Total
Research and Development Expense
Research and development
Two Thousand Twenty Five Bonus Plan [Member]
Two thousand twenty five bonus plan.
2025 Bonus Plan
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]
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Schedule of Stock Option Activity
Equity [Text Block]
Stockholders' Equity
Earnings Per Share [Text Block]
Net Loss Per Share
Net loss attributable to common stockholders
Net loss
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Intrinsic value, balance at end of period
Operating Lease, Cost
Operating lease costs
Litigation Settlement, Amount Awarded to Other Party
Litigation potential settlement amount
Purchase Obligation
Minimum purchase commitments, Total
Operating Lease, Payments
Operating outgoing cash flows - operating lease
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value
Intrinsic value, vested and expected to vest at end of period
Assets [Abstract]
Assets
Construction in Progress [Member]
Construction in Progress
Increase (Decrease) in Prepaid Expense and Other Assets
Prepaid expenses and other current assets and other assets
Finance lease liability payments net of reimbursements due year two.
Finance Lease Liability Payments Net Of Reimbursements Due Year Two
2028
Document Fiscal Year Focus
Document Fiscal Year Focus
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Investing activities
Accounts Payable, Current, Total
Accounts Payable, Current
Accounts payable
Interest Expense, Nonoperating, Total
Interest Expense, Nonoperating
Interest expense
Research and Development Expense [Member]
Research and Development
Accounting Standards Update and Change in Accounting Principle [Abstract]
Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block]
Unaudited Interim Condensed Consolidated Financial Statements
Insurance receivable
Insurance Receivable for Malpractice, Total
Insurance Receivable for Malpractice
Purchase Obligation, to be Paid, Year One
Minimum purchase commitments, 2027
Noncontrolling Interest, Decrease from Deconsolidation
Dissolution of joint venture, Redeemable Non-Controlling interest
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
2027
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, Total
Net Income (Loss) Available to Common Stockholders, Basic
Net loss
Lessee, Operating Lease, Liability, to be Paid, after Year Five
Thereafter
Share-Based Payment Arrangement [Abstract]
Assets, Fair Value Disclosure
Total fair value assets
Total fair value
Assets, Fair Value Disclosure, Total
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
Schedule of Restricted Stock Units with Service Condition and Performance Stock Unit Activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
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
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Cancelled and forfeited (in dollars per share)
Weighted Average grant date fair value, Forfeited
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value
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 Funds
Litigation Amount Accrued
Litigation amount accrued.
Litigation amount accrued
Debt Securities, Available-for-sale, Allowance for Credit Loss, Ending Balance
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance
Debt Securities, Available-for-sale, Allowance for Credit Loss, Total
Debt Securities, Available-for-Sale, Allowance for Credit Loss
Allowance for credit losses
Class of Warrant or Right [Line Items]
Class Of Warrant Or Right [Line Items]
PowerCo SE [Member]
PowerCo SE.
PowerCo
Summary of significant accounting policies.
Summary Of Significant Accounting Policies [Line Items]
Summary Of Significant Accounting Policies [Line Items]
Common Stock Issuance Costs Accrued But Not Paid
Common stock issuance costs, accrued but not paid.
Common stock issuance costs, not yet paid
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year
2026 (remaining nine months)
Other Liabilities, Noncurrent
Other liabilities
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
Purchase Obligation, to be Paid, Year Four
Minimum purchase commitments, 2030
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
Fair Value, Recurring and Nonrecurring [Table]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]
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
Related Party Transaction [Table]
Principal payment for finance lease.
Principal Payments for Finance Lease
Principal payment for finance lease
Employee-related Liabilities, Current, Total
Employee-related Liabilities, Current
Accrued compensation and benefits
J.b. Straubel [Member]
J.B. Straubel.
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Financing activities
Recurring
Fair Value, Recurring [Member]
Lessee, Operating Lease, Liability, to be Paid
Total
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Less present value discount
Equity Components [Axis]
Equity Components
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
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.
Change in fair value of assumed common stock warrant liabilities
Non-cash change in fair value of assumed common stock warrant liabilities
Non-cash change in fair value of assumed common stock warrant liabilities
Shares issued under At-The-Market Offering, net of issuance costs, value
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.
Number Of Marketable Securities
Number of marketable securities in an unrealized loss position
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
Common stock voting rights, description
Schedule Of Earnings Per Share Basic And Diluted [Table]
Schedule of earnings per share basic and diluted.
Schedule Of Earnings Per Share Basic And Diluted [Table]
Maximum
Maximum [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)
Common Stock, Value, Issued, Ending Balance
Common Stock, Value, Issued, Beginning Balance
Common Stock, Value, Issued, Total
Common Stock, Value, Issued
Common stock - $0.0001 par value; 1,250,000 shares authorized (1,000,000 Class A and 250,000 Class B); 578,145 Class A and 36,968 Class B shares issued and outstanding as of March 31, 2026, 570,128 Class A and 37,502 Class B shares issued and outstanding as of December 31, 2025
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
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Impairment of Long-Lived Assets
Other Nonoperating Income (Expense) [Abstract]
Other income (expense):
Preferred Stock, Shares Authorized
Preferred stock, authorized
Summary of significant accounting policies.
Summary Of Significant Accounting Policies [Table]
Summary Of Significant Accounting Policies [Table]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss
Total gross unrealized loss
Total gross unrealized loss
Related Party Transaction [Line Items]
Entity Registrant Name
Entity Registrant Name
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax
Gross Unrealized Loss
Other Nonoperating Income (Expense)
Total other income
Other income (expense)
Stock-based compensation award cancelled
Shares Granted, Value, Share-Based Payment Arrangement, Forfeited
Jagdeep Singh [Member]
Jagdeep Singh [Member]
Income Tax Expense (Benefit), Total
Income Tax Expense (Benefit)
Income tax provision
Income tax provision
Measurement Frequency [Axis]
Measurement Frequency
Proceeds from common stock
Proceeds from Issuance of Common Stock
Proceeds from issuance of common stock, net of issuance costs paid
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
Area of rentable space lease.
Area Of Rentable Space Lease
Area of rentable space lease
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated other comprehensive income
Accumulated other comprehensive income (loss)
Payments to Acquire Property, Plant, and Equipment, Total
Payments to Acquire Property, Plant, and Equipment
Purchases of property and equipment, net
Purchases of property and equipment
Payment for (Proceeds from) Other Investing Activity
Other
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period
Number of Units, Granted
Stock units granted
Assets
Total assets
Property, Plant and Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term (Years), vested and exercisable
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
Stock-Based Compensation
Share-Based Payment Arrangement [Policy Text Block]
Deferred Income Tax Expense (Benefit), Total
Deferred Income Tax Expense (Benefit)
Deferred income tax expense (benefit)
Finance lease liability payments net of reimbursements due next twelve months.
Finance Lease Liability Payments Net Of Reimbursements Due Next Twelve Months
2027
Issuance of common Stock, Shares
Stock Issued During Period, Shares, New Issues
Number of shares sold during period
Lease, Cost [Abstract]
Lease costs
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period
Number of Units, Vested
Earnings Per Share, Diluted, Total
Earnings Per Share, Diluted
Net loss per share - Diluted
Diluted net loss per share
Title and Position [Domain]
Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration]
City Area Code
City Area Code
Finance Lease, Liability, Noncurrent
Finance lease liability, long-term
Counterparty Name [Domain]
Variable Lease, Cost
Variable lease costs
Operating Lease, Weighted Average Remaining Lease Term
Weighted-average remaining lease term - operating lease (in years)
Lease Expiration Date
Lease expiration date
Total lease expense
Lease, Cost
Property, Plant and Equipment, Net, Ending Balance
Property, Plant and Equipment, Net, Beginning Balance
Property, Plant and Equipment, Net
Property and equipment, net
Property and equipment, net
2026 Bonus Plan
Two Thousand Twenty Six Bonus Plan [Member]
Two thousand twenty six bonus plan.
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
Retained Earnings [Member]
Accumulated Deficit
Share-based Payment Arrangement, Noncash Expense, Total
Share-Based Payment Arrangement, Noncash Expense
Stock-based compensation expense
Non-cash stock-based compensation
Payments of Stock Issuance Costs
Stock issuance costs
Common stock issuance costs paid
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months
Fair value less than 12 consecutive months
Operating Lease, Weighted Average Discount Rate, Percent
Weighted-average discount rate - operating lease
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 (used in) 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
Document and entity information.
Document And Entity Information [Line Items]
Document And Entity Information [Line Items]
Dr. Fritz Prinz [Member]
Dr. Fritz Prinz [Member]
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
Debt Securities, Available-for-Sale [Table]
Debt Securities Available For Sale [Table]
Entity Interactive Data Current
Entity Interactive Data Current
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
Lessee, operating lease and finance lease, description.
Lessee, Operating Lease And Finance Lease, Description
Estimated useful lives of assets
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
Other liabilities
Increase (Decrease) in Other Noncurrent Liabilities
Other long-term 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
Local Phone Number
Local Phone Number
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount
Stock-based compensation unvested stock options not yet recognized
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Denominator:
Weighted-average shares used in computing net income (loss) per share of common stock
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
Joint venture and non-controlling interest.
Joint Venture And Non Controlling Interest [Abstract]
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
Lessee, Operating Lease, Liability, to be Paid, Year Four
2030
Class of Stock [Domain]
Class of Stock
Commercial Paper [Member]
Commercial Paper
Personnel costs
Labor and Related Expense
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Expected to be recognized estimated weighted average period
Prof. Dr. Jurgen Leohold [Member]
Prof. Dr. Jurgen Leohold.
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
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term (Years), vested and expected to vest