Document And Entity Information Note To Financial Statement Details Textual Significant Accounting Policies Note 4 - Deconsolidation Due to Loss of Control Note 5 - Property, Plant, and Equipment Note 6 - Leases Note 7 - Accounts Payable and Accrued Expenses Note 8 - Convertible Notes Payable at Fair Value Long-Term Liabilities Note 9 - Shareholders' Equity Note 10 - General and Administrative Expenses Debenture Tranche Six B [Member] Represent the debenture tranche 6B. Note 11 - Research and Development Expenses Income Tax Disclosure [Text Block] Note 12 - Selling and Distribution Expenses Note 15 - Fair Value of Financial Instruments Note 4 - Deconsolidation Due to Loss of Control - Condensed Balance Sheet (Details) Note 5 - Property, Plant, and Equipment - Summary of Property, Plant and Equipment (Details) us-gaap_LiabilitiesCurrent Total Current Liabilities Note 6 - Leases - Maturities of Operating Lease Liabilities (Details) Note 6 - Leases - Balance Sheet Classifications (Details) Schedule of Debt [Table Text Block] Note 7 - Accounts Payable and Accrued Expenses - Summary of Accounts Payable and Accrued Expenses (Details) Convertible Debt [Table Text Block] Note 8 - Convertible Notes Payable at Fair Value - Convertible Debt (Details) Other current liabilities Debenture Tranche Six D [Member] Represents the debenture tranche 6D. Note 8 - Convertible Notes Payable at Fair Value - Schedule of Debt (Details) Debenture Tranche Six C [Member] Represents the debenture tranche 6C. Note 8 - Convertible Notes Payable at Fair Value - Schedule of Debt (Details) (Parentheticals) Debenture Tranche Six A [Member] Represents the debenture tranche 6A. Note 8 - Convertible Notes Payable at Fair Value - Summary of Valuation Assumption (Details) Note 9 - Shareholders' Equity - Option Activity (Details) Note 10 - General and Administrative Expenses - Summary of General and Administrative Expenses (Details) Note 11 - Research and Development Expenses - Schedule of Research and Development Expenses (Details) Note 12 - Selling and Distribution Expenses - Schedule of Selling and Distribution Expenses (Details) Note 15 - Fair Value of Financial Instruments - Schedule of Liabilities at Fair Value (Details) Share-Based Payment Arrangement, Option, Activity [Table Text Block] Note 15 - Fair Value of Financial Instruments - Schedule of Level 3 Liabilities Reconciliation (Details) Notes To Financial Statements us-gaap_OtherOperatingIncomeExpenseNet Other Operating (income)/loss Notes To Financial Statements [Abstract] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Exercisable, exercise price (in EUR per Share) Exercisable, contractual life (Year) Exercisable, number (in shares) Outstanding, contractual life (Year) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice Outstanding, exercise price (in EUR per Share) Outstanding, exercise price (in EUR per Share) Convertible notes payable at fair value Accounts payable and accrued expenses Accounts payable and other liabilities us-gaap_TaxesPayableCurrent VAT payable us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Foreign exchange rate at year end USD/EUR Lessee, Operating Leases [Text Block] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber Outstanding (in shares) Outstanding (in shares) us-gaap_PaymentsForProceedsFromProductiveAssets Acquisition of equipment us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Current Liabilities Lease Liability us-gaap_Assets Total Assets Supplemental disclosure of cash flow information: Plan Name [Axis] Plan Name [Domain] us-gaap_OperatingLeaseExpense Operating Lease, Expense Business Description and Basis of Presentation [Text Block] Award Type [Domain] Effective Income Tax Rate Reconciliation [Table] Net income (loss) Net (loss) / income Net Income (Loss) Attributable to Parent Basis of Presentation and Significant Accounting Policies [Text Block] Award Type [Axis] Restricted Stock Units (RSUs) [Member] Share-Based Payment Arrangement, Option [Member] us-gaap_PreferredStockConvertibleConversionPrice Preferred Stock, Convertible, Conversion Price Commitments and Contingencies Disclosure [Text Block] us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment Accumulated depreciation Property, plant and equipment, net of accumulated depreciation Fixed assets Property, Plant and Equipment, Net Machinery & equipment Cash Flows from Investing Activities Convertible Debt [Member] Euro Member Countries, Euro Convertible Notes Payable [Member] Accounts payable and accrued expenses us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities us-gaap_IncomeTaxExpenseBenefit Income Tax Expense (Benefit) us-gaap_OperatingExpenses Total Operating Expenses and Costs Other expenses General and administrative expenses Total general and administrative expenses All Currencies [Domain] Insurance Cash Cash and Cash Equivalent us-gaap_IncreaseDecreaseInOtherCurrentLiabilities Other current liabilities us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1 Debt Instrument, Convertible, Threshold Consecutive Trading Days Fair value measurement inclusive of foreign exchange (gain)/loss Personnel costs Software fees and subscriptions us-gaap_DebtInstrumentConvertibleConversionPrice1 Debt Instrument, Convertible, Conversion Price (in dollars per share) VAT payable us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Fair value measurement (gain)/loss Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Amendment Flag us-gaap_DebtInstrumentIssuanceDate1 Issuance Date dei_CityAreaCode City Area Code us-gaap_DebtInstrumentMaturityDate Maturity Date Use of Estimates, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Issuance of Ordinary Shares in connection with December 2024 reverse share split (in shares) us-gaap_SharesOutstanding Balance (in shares) Balance (in shares) Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Preferred Stock, Shares Outstanding (in shares) Preferred Stock, Shares Outstanding Current Fiscal Year End Date us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets Prepaid expenses and other Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent Operating Lease, Weighted Average Discount Rate, Percent Document Fiscal Period Focus Document Fiscal Year Focus Lease, Cost [Table Text Block] dei_DocumentPeriodEndDate Document Period End Date us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1 Operating Lease, Weighted Average Remaining Lease Term dei_EntityFileNumber Entity File Number us-gaap_IncreaseDecreaseInPrepaidTaxes Prepaid taxes dei_EntityExTransitionPeriod Entity Ex Transition Period Entity Emerging Growth Company Face value Debt Instrument, Face Amount dei_DocumentType Document Type Entity Small Business dei_EntityShellCompany Entity Shell Company Document Information [Line Items] Document Information [Table] us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue Balance Balance us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements Debt Conversion Entity Filer Category Debt Instrument [Axis] dei_EntityCurrentReportingStatus Entity Current Reporting Status Debt Instrument, Name [Domain] Proceeds from new Borrowings Proceeds from new Borrowings Schedule of Long-Term Debt Instruments [Table] Entity Tax Identification Number Entity Central Index Key dei_EntityRegistrantName Entity Registrant Name Liability Class [Axis] Fair Value by Liability Class [Domain] Entity [Domain] Legal Entity [Axis] dei_EntityAddressAddressLine1 Entity Address, Address Line One Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] dei_EntityAddressCityOrTown Entity Address, City or Town ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] dei_EntityAddressCountry Entity Address, Country ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] dei_EntityAddressPostalZipCode Entity Address, Postal Zip Code ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Material Terms of Trading Arrangement [Text Block] dei_EntityCommonStockSharesOutstanding Entity Common Stock, Shares Outstanding (in shares) Trading Arrangements, by Individual [Table] us-gaap_MarketingAndAdvertisingExpense Advertising and marketing Professional fees us-gaap_IncreaseDecreaseInInventories Inventory Trading Symbol Issuance of Preferred Shares in September 2025 Issuance of Preferred Shares in September 2025 (in shares) dei_LocalPhoneNumber Local Phone Number us-gaap_TableTextBlock Notes Tables us-gaap_SalesCommissionsAndFees Personnel expenses us-gaap_OtherSellingAndMarketingExpense Other expenses Selling and distribution expenses Total selling and distribution expenses us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures Issuance of Ordinary Shares in connection with SPA in July 2024 (in shares) us-gaap_LiabilitiesAndStockholdersEquity Total Liabilities and Shareholders’ Equity us-gaap_CashUninsuredAmount Cash, Uninsured Amount Issuance of Ordinary Shares in connection with SPA in July 2024 Accumulated deficit Retained Earnings (Accumulated Deficit) Research and development Total research and development expenses Measurement Input, Share Price [Member] Debt Disclosure [Text Block] Measurement Input, Price Volatility [Member] Changes in operating assets and liabilities: Measurement Input, Risk Free Interest Rate [Member] us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements Substantial Doubt about Going Concern [Text Block] us-gaap_OtherNoncashIncomeExpense Other non-cash (income)/expenses Lease liability, long term portion Lease Liability, Noncurrent Subsequent Event [Member] Measurement Input, Expected Term [Member] Present value of lease payments Lease Liability Measurement Input, Discount for Lack of Marketability [Member] Subsequent Event [Table] Lease liability, current portion Lease Liability. Current Measurement Input, Exercise Price [Member] Subsequent Event Type [Axis] Debt Instrument, Measurement Input Debt Instrument, Measurement Input Subsequent Event Type [Domain] Subsequent Events [Text Block] Right of use lease assets us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue Total Lease payments Less interest 2028 Measurement Input Type [Axis] Measurement Input Type [Domain] Fair Value Measurement, Policy [Policy Text Block] Fair Value of Financial Instruments, Policy [Policy Text Block] 2026 2027 Segment Reporting, Policy [Policy Text Block] Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Lessee, Leases [Policy Text Block] 2025 (remaining) us-gaap_DebtConversionConvertedInstrumentSharesIssued1 Debt Conversion, Converted Instrument, Shares Issued Earnings Per Share, Policy [Policy Text Block] us-gaap_DebtConversionOriginalDebtAmount1 Debt Conversion, Original Debt, Amount Debt Conversion Description [Axis] Debt Conversion, Name [Domain] Operating Expenses and Costs Income Tax, Policy [Policy Text Block] us-gaap_Depreciation Depreciation us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 Stockholders' Equity Note, Stock Split, Conversion Ratio Depreciation of property, plant and equipment us-gaap_LiabilitiesFairValueDisclosure Total Liabilities Share-Based Payment Arrangement, Forfeiture [Policy Text Block] us-gaap_AssetsCurrent Total Current Assets Equity [Text Block] us-gaap_OtherResearchAndDevelopmentExpense Other expenses Fair Value Measurement Inputs and Valuation Techniques [Table] us-gaap_AssetsNet Net assets recorded on reconsolidation Common Stock Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Adjustments to reconcile net income to net cash used in operating activities Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, par value (in EUR per Share) Common Stock, Par or Stated Value Per Share Revenue from Contract with Customer [Policy Text Block] Statistical Measurement [Domain] Lessee, Lease, Description [Table] Maximum [Member] Minimum [Member] Ownership [Domain] Statistical Measurement [Axis] Preferred Shares, par value €300.00 per share, 1,401 shares authorized, 1,401 and 0 shares issued and outstanding as of September 30, 2025 and December 31, 2024, respectively (Note 9) Ownership [Axis] us-gaap_DeferredTaxAssetsLiabilitiesNet Deferred Tax Assets, Net Prepaid taxes Prepaid taxes Preferred Stock, Shares Issued (in shares) Preferred Stock, Shares Issued Cash paid during the period for interest Cash paid during the period for income tax Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment [Table Text Block] Preferred Stock, Shares Authorized (in shares) Preferred Stock, Shares Authorized Inventory Preferred Stock, Par or Stated Value Per Share (in EUR per Share) Preferred Stock, Par or Stated Value Per Share Revenue Fair Value, Inputs, Level 3 [Member] Gain / (loss) on foreign currency transactions Currency [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Axis] us-gaap_PropertyPlantAndEquipmentUsefulLife Property, Plant and Equipment, Useful Life Cash Flows from Operating Activities Statement [Line Items] us-gaap_NumberOfOperatingSegments Number of Operating Segments Additional paid-in capital Shareholders’ Equity Property, Plant and Equipment, Policy [Policy Text Block] Property, Plant and Equipment [Table] us-gaap_NonoperatingIncomeExpense Total Other (Expense) / Income Sono Group S.à r.l. [Member] Represents Sono Group S.à r.l. Current Assets Conversion of Convertible Debentures into Preferred Stock [Member] Represents the conversion of convertible debentures into preferred stock. Reclassification of par value in connection with September 2025 change in nominal share price The effect of the reclassification of par value. Debenture Tranche Six F [Member] Represents debenture tranche 6f. Fair Value Disclosures [Text Block] Debenture Tranche Six E [Member] Represents debenture tranche 6e. us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash at December 31, 2024 and 2023 Cash at September 30, 2025 and 2024 Inventory, Policy [Policy Text Block] Effect of currency translation on cash us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Net increase (decrease) in cash us-gaap_Liabilities Total Liabilities us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash provided by financing activities Commitments and Contingencies Effect of currency translation on cash us-gaap_OperatingIncomeLoss (Loss)/Income from Operations Operating Income (Loss) Other Income (Expenses) us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash (used in)/provided by investing activities Cost of sales us-gaap_GrossProfit Gross margin Counterparty Name [Axis] Counterparty Name [Domain] High Voting Shares [Member] Represents high voting shares. Omnibus Amendment to Transaction Documents [Member] Relating to the Omnibus Amendment to Transaction Documents. 2029 and beyond Amount of lessee's undiscounted obligation for lease payment for operating lease due after third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). us-gaap_ContractWithCustomerLiability Contract with Customer, Liability Ordinary Shares [Member] Represents ordinary shares. Accrued Interest Reverse Stock Split [Member] Relating to a reverse stock split. us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent Total accounts payable and accrued liabilities Debenture Tranche Seven [Member] Represents debenture tranche 7. Consolidated Entities [Axis] Consolidated Entities [Domain] Trade accounts payable Concentration Risk, Credit Risk, Policy [Policy Text Block] August 2024 Debenture [Member] Represents the August 2024 debentures. The 2024 Debentures [Member] Represents the 2024 Debentures. CSOP [Member] Relating to the CSOP. February 2024 Debenture (Member) Represents the February 2024 Debenture. The 2022 Debentures [Member] Represents the 2022 Debentures. sev_ReconsolidationDeconsolidationOfTheSubsidiaryCashBalance Reconsolidation of the Subsidiary cash balance Amount of reconsolidation (deconsolidation) of the subsidiary cash balance. Condensed Balance Sheet [Table Text Block] Other accrued liabilities sev_PolicyTable Scenario [Domain] Forecast [Member] Retained Earnings [Member] Proceeds from the issuance of common stock Scenario [Axis] Additional Paid-in Capital [Member] Common Stock [Member] Preferred Stock [Member] Equity Components [Axis] Equity Component [Domain] Stock, Class of Stock [Table] Prepaid expenses and other Prepaid expenses and other current assets Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. It doesn't include prepaid taxes. sev_GainLossOnDeconsolidation Gain (Loss) on Deconsolidation Amount of realized and unrealized gain (loss) on deconsolidation. sev_IncreaseDecreaseInOperatingLeaseRightOfUseAssets Right of use lease assets The increase (decrease) during the reporting period in the aggregate value of operating lease right of use assets. sev_GainLossOnDeconsolidationAndExtinguishmentOfDebt Gain on reconsolidation Amount of gain or loss on deconsolidation and difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Income from changes in fair value of convertible note payable carried at fair value (Loss) / income from changes in fair value of convertible note payable carried at fair value Amount of expense (income) related to adjustment to fair value of convertible debt liability. Deconsolidation [Text Block] The entire disclosure pertaining to deconsolidation. sev_NetDeconsolidationGainAndReversalOfParentalGuaranteeProvision Net Deconsolidation Gain and Reversal of Parental Guarantee Provision Amount of net deconsolidation gain and reversal of parental guarantee provision. sev_WorkingCapitalDeficit Working Capital Deficit Amount of working capital deficit. Cash and Cash Equivalents, Policy [Policy Text Block] Sono Motors GmbH [Member] Represents Sono Motors GmbH. Document Quarterly Report Entity Incorporation, State or Country Code Face value $30,906 convertible notes Accounting Policies [Abstract] Document Transition Report Basis of Accounting, Policy [Policy Text Block] dei_EntityInteractiveDataCurrent Entity Interactive Data Current General and Administrative Expenses [Text Block] The entire disclosure for general and administrative expenses. Security Exchange Name Title of 12(b) Security sev_ResearchAndDevelopmentExpensePersonnelExpenses Personnel expenses Amount of expense for personnel expenses of research and development. Selling and Distribution Expenses [Text Block] The entire disclosure for selling and distribution expense. Research and Development Expenses [Table Text Block] Tabular disclosure of research and development expenses. General and Administrative Expenses [Table Text Block] Tabular disclosure of general and administrative expenses. sev_ResearchAndDevelopmentExpenseProfessionalFees Professional fees Amount of expense for professional fees of research and development. Proceeds from the issuance of convertible notes Proceeds from Convertible Debt sev_ResearchAndDevelopmentExpenseDevelopmentCosts Development costs Amount of expense for development costs of research and development expenses. Schedule of Selling and Distribution Expenses [Table Text Block] Tabular disclosure of selling and distribution expenses. Nonmonetary Transaction Type [Domain] Nonmonetary Transaction Type [Axis] sev_DebtInstrumentCouponRate Debt Instrument, Coupon Rate Coupon rate for funds borrowed, under the debt agreement. Yorkville [Member] Represents Yorkville. Debenture, Tranche Five [Member] Represents Debenture, Tranche Five. Debenture, Tranche Four [Member] Represents Debenture, Tranche Four. Fair value per share (in dollars per share) Fair value per share of convertible debt. Measurement Input, Indexed Common Shares [Member] Measurement input using indexed common shares. Debenture, Tranche One [Member] Represents Debenture, Tranche One. Convertible Notes Due December 7, 2023 [Member] Represents convertible notes due December 7, 2023. Debenture, Tranche Three [Member] Represents Debenture, Tranche Three. Debenture, Tranche Two [Member] Represents Debenture, Tranche Two. sev_DebtInstrumentDefaultRate Debt Instrument, Default Rate Represents default rate of debt instruments. Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Indexed common shares (in shares) The number of common share to which convertible debt in indexed. Statement [Table] Statement of Financial Position [Abstract] Diluted (in EUR per Share) Earnings Per Share, Diluted Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Accounts Payable and Accrued Liabilities Disclosure [Text Block] Basic (in EUR per Share) Earnings Per Share, Basic Statement of Cash Flows [Abstract] Statement of Stockholders' Equity [Abstract] Income Statement [Abstract] us-gaap_LesseeOperatingLeaseRemainingLeaseTerm Lessee, Operating Lease, Remaining Lease Term Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminated Restructuring and Related Cost, Number of Positions Eliminated Accounting Standards Update and Change in Accounting Principle [Table] sev_OperatingLeaseExpenseMonthToMonthBasis Operating Lease Expense, Month to Month Basis Amount of operating lease expense running a month-to-month basis. The 2025 Debentures [Member] Represents The 2025 Debentures. Other Commitments [Table] Post Reverse Split [Member] Represents the post reverse split. Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] sev_GainLossOnReconsolidation Gain on reconsolidation The amount of gain (loss) of reconsolidation. Cash Flows from Financing Activities Building lease expense Amount of building leas expense. Total Fair Value of Convertible Notes Disaggregation of Income Statement Expense, Caption [Table] Conversion of Debt to Perpetual Preferred Stock [Member] Represents Conversion of Debt to Perpetual Preferred Stock. Research, Development, and Computer Software Disclosure [Text Block] sev_PreferredStockConvertibleThresholdTradingDays Preferred Stock, Convertible, Threshold Trading Days Threshold number of specified trading days that common stock price to conversion price of convertible preferred stock must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature. sev_PreferredStockConvertibleThresholdPercentageOfStockPriceTrigger Preferred Stock, Convertible, Threshold Percentage of Stock Price Trigger Percentage of stock price to conversion price of convertible preferred stock to determine eligibility of conversion. us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates Payments to Acquire Interest in Subsidiaries and Affiliates us-gaap_StockholdersEquity Total Shareholders’ Equity Balance Balance Conversion of Debt into Common Stock [Member] Represents Conversion of Debt into Common Stock. Class of Stock [Axis] Class of Stock [Domain]