Document And Entity Information
Note To Financial Statement Details Textual
Significant Accounting Policies
Note 3 - Summary of Significant Accounting Policies
us-gaap_IncomeTaxExpenseBenefit
Income taxes
Income taxes
Actual income tax expense/(benefit) - continuing operations
Note 4 - Fair Value Measurements
Note 6 - Formation of EverOn Energy Joint Venture and Consolidation of Variable Interest Entity
Note 7 - Prepaid Expenses and Other Current Assets
Note 8 - Capitalized Development Cost and Other Long-term Assets
Note 9 - Accounts Payable
Note 10 - Accrued Liabilities
Note 11 - Taxes Recoverable and Payable
Note 12 - Convertible Debt and Non-Convertible Promissory Notes
Note 14 - Leases
Note 17 - Discontinued Operations Sold - Poland and Netherlands
us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Gain (loss) on foreign currency exchange rates
Note 18 - Sale of Spanish Subsidiaries
Note 19 - Sale of Assets Held for Sale: MH 02 & its Subsidiaries
Note 20 - Shareholders' Equity
Note 21 - Segment and Geographic Information
Shares Issued for Joint Venture Agreement (in shares)
Number of shares of stock issued attributable to joint venture agreement.
Note 22 - Income Tax Provision
Note 23 - Related Party
us-gaap_MinorityInterestInJointVentures
Noncontrolling Interest in Joint Ventures
Note 3 - Summary of Significant Accounting Policies - Cash Flows of Discontinued Operations (Details)
Deconsolidation of Entities to Parent Company
Amount of increase (decrease) to additional paid in capital (APIC) resulting from deconsolidation of entities.
Note 3 - Summary of Significant Accounting Policies - Disaggregation of Revenues (Details)
Note 3 - Summary of Significant Accounting Policies - Summary of Antidilutive Securities (Details)
Shares Issued for Joint Venture Agreement
Value of shares of stock issued attributable to joint venture agreement.
Note 4 - Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)
alce_AdjustmentToAdditionalPaidinCapitalTransferDebt
Transfer of Debt from Parent Company
Amount of increase (decrease) to additional paid in capital (APIC) resulting from transfer debt
alce_NumberOfMajorCustomers
Number of Major Customers
Represents the number of major customers.
Note 4 - Fair Value Measurements - Schedule of Fair Value Assets with Unobservable Inputs (Details)
Note 4 - Fair Value Measurements - Summary of Fair Value Assumptions (Details)
Note 4 - Fair Value Measurements - Schedule of Fair Value Liabilities With Unobservable Inputs (Details)
One Customer [Member]
Relating to one customer.
Note 4 - Fair Value Measurements - Schedule of Fair Value Liabilities With Unobservable Inputs (Details) (Parentheticals)
Note 6 - Formation of EverOn Energy Joint Venture and Consolidation of Variable Interest Entity - Schedule of Consideration Transferred (Details)
Note 6 - Formation of EverOn Energy Joint Venture and Consolidation of Variable Interest Entity - Schedule of Consideration Transferred (Details) (Parentheticals)
Note 6 - Formation of EverOn Energy Joint Venture and Consolidation of Variable Interest Entity - Assets Acquired (Details)
Note 6 - Formation of EverOn Energy Joint Venture and Consolidation of Variable Interest Entity - Pro Forma Information (Details)
Note 7 - Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details)
Note 8 - Capitalized Development Cost and Other Long-term Assets - Schedule of Capitalized Development Costs and Other Long-Term Assets (Details)
Note 9 - Accounts Payable - Schedule of Accounts Payable (Details)
Related Party Transaction [Policy Text Block]
The disclosure of the company's policy regarding related party transactions.
Note 10 - Accrued Liabilities - Schedule of Accrued Liabilities (Details)
Note 11 - Taxes Recoverable and Payable - Schedule of Taxes Recoverable (Details)
Five Customers [Member]
Relating to five customers.
Note 12 - Convertible Debt and Non-Convertible Promissory Notes - Convertible Notes (Details)
Note 12 - Convertible Debt and Non-Convertible Promissory Notes - Schedule of Debt (Details)
Note 14 - Leases - Summary of Operating Lease Components (Details)
Note 17 - Discontinued Operations Sold - Poland and Netherlands - Summary of Disposal Groups (Details)
Note 17 - Discontinued Operations Sold - Poland and Netherlands - Summary of Disposal Groups (Details) (Parentheticals)
Note 18 - Sale of Spanish Subsidiaries - Summary of Assets and Liabilities in Sale of Subsidiary (Details)
Note 19 - Sale of Assets Held For Sale: MH 02 & Its Subsidiaries - Summary of Assets and Liabilities in Sale of Subsidiary (Details)
Taxes Receivable and Payable [Policy Text Block]
The disclosure of the company's policy for taxes receivable and payable.
Note 20 - Shareholders' Equity - Summary of Warrant Activity (Details)
Note 21 - Segment and Geographic Information - Schedule of Segment Information (Details)
Risks and Uncertainties [Policy Text Block]
The disclosure of the company's policy regarding risks and uncertainties.
Note 22 - Income Tax Provision - Components of Tax Expense (Details)
Capitalized Costs and Impairment [Policy Text Block]
The disclosure of the company's policy regarding capitalized costs and impairment.
Note 22 - Income Tax Provision - Tax Reconciliation (Details)
Note 22 - Income Tax Provision - Tax Reconciliation (Details) (Parentheticals)
Note 22 - Income Tax Provision - Deferred Tax Assets (Details)
Note 22 - Income Tax Provision - Unrecognized Tax Benefits (Details)
Note 23 - Related Party - Related Party Transactions (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Restricted cash
Amount classified as restricted cash attributable to disposal group held for sale or disposed of.
Green Certificates [Member]
Green Certificates
Segment Reporting [Text Block]
Energy Offtake Agreements [Member]
Energy Offtake Agreements
Foreign Currency Translation Reserve [Member]
Represents the foreign currency translation reserve.
Country Renewable Programs [Member]
Country Renewable Programs
alce_TotalRevenueIncludingDiscontinuedOperations
Total for the period
Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).
Segment Reporting [Table Text Block]
Preferred stock
Shares returned on recission of Liion (in shares)
Represents the number of shares returned on the rescission of a business acquisition.
us-gaap_Liabilities
Total for Europe – Continuing Operations
Total Liabilities
Debt Issuance Costs
Represents the value of shares of stock issued during period that were issued for debt issuance costs.
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]
Shares returned on recission of Liion
Represents the value of shares returned on the rescission of a business acquisition during the period.
Debt Issuance Costs (in shares)
Represents the number of shares issued during the period for debt issuance costs.
alce_NonCashInvestingAndFinancingActivitiesSharesIssuedForStockCompensationToThirdParties
Shares issued for stock compensation to third parties
Represents the value of shares issued for stock compensation to third parties reported as non cash investing and financing activities.
us-gaap_LiabilitiesAndStockholdersEquity
Total Liabilities and Shareholders' Equity / (Deficit)
Settlement of Payables for Shares (in shares)
Represents the number of shares issued for settlement of payables during the period.
Business Combination Agreement [Member]
Represents the business combination agreement.
Settlement of Related Party Debt for Shares
Represents the value of shares issued during the period for the settlement of related party debt.
Settlement of Related Party Debt for Shares (in shares)
Represents the number of shares issued in the settlement of related party debt.
Segment Reporting [Table]
Settlement of Payables for Shares
Represents the value of stock issued during the period for the settlement of payables.
Total liabilities sold
Total discontinued operations liabilities
us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Prepaid expenses and other assets
alce_StockIssuedDuringPeriodValueMergerCostsSettlementOfRelatedPartyDebtAndStock
Merger Costs – Settlement of Related Party Debt and Conversion of Debt
Represents the value of stock issued during the period related to merger costs and the settlement of related party debt and stock.
Project [Axis]
us-gaap_SellingGeneralAndAdministrativeExpense
Selling, general, and administrative
alce_ResetPrice
Reset Price (in dollars per share)
The reset price.
Additional Shares [Member]
Additional Shares
Forward Purchase Agreement [Member]
Forward Purchase Agreement
Lessee, Lease, Description [Table]
Development costs
Development costs
Recycled Shares [Member]
Recycled Shares
Lease Contractual Term [Axis]
Lease Contractual Term [Domain]
Liability for Future Policy Benefit, by Product Segment [Table]
Changes in assets and liabilities, net of effects of acquisitions:
Accounts payable
us-gaap_IncreaseDecreaseInAccountsPayable
Series B Preferred Stock [Member]
Series C Preferred Stock [Member]
Accrued liabilities
us-gaap_IncreaseDecreaseInAccruedLiabilities
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net increase/(decrease) in cash
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Balance
Balance
Series A Preferred Stock [Member]
Effect of exchange rate on cash
Solar Energy Facilities [Member]
Solar Energy Facilities
alce_ConsultingAgreementInitialTerm
Consulting Agreement, Initial Term (Year)
Represents the initial term of a consulting agreement.
Rescission [Text Block]
Represents the entire disclosure of a rescission.
Capitalized Development and Other Long-Term Assets [Text Block]
Represents the entire disclosure of capitalized development and other long-term assets during the period.
Prepaid Expenses and Other Current Assets [Text Block]
Represents the entire disclosure of prepaid expenses and other current assets during the period.
Convertible Notes, April 2024 [Member]
Represents the April 2024 convertible notes.
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash beginning of the year
Cash end of the year
Convertible Note [Member]
Represents convertible note.
Convertible Notes, October 2024 [Member]
Represents the October 2024 convertible notes.
Taxes Recoverable and Payable [Text Block]
Represents the entire disclosure of taxes recoverable and payable during the period.
Comprehensive income/(loss):
alce_TaxesRecoverableAndPayable
Total
Represents the amount of taxes recoverable and payable.
Schedule of Taxes Recoverable and Payable [Table Text Block]
Represents the tabular disclosure of the schedule of taxes recoverable and payable during the period.
Consulting fees
Represents the current portion of accrued consulting fees.
Other Payables [Text Block]
Represents the entire disclosure of other payables.
Promissory Note [Member]
Represents a promissory note.
Fair Value, off-Balance-Sheet Risk [Table]
alce_SolisBondWaiverFees
Solis bond waiver fee
The amount of Solis Bond Waiver Fees.
Development Costs [Text Block]
Represents the entire disclosure for development costs during the period.
Group of Private Lenders [Member]
Represents a debt instrument with a group of private lenders.
Solar PV Projects in Spain [Member]
Represents the solar pv projects in Spain.
Alternus Energy Americas [Member]
Represents Alternus Energy Americas.
Working Capital Loan [Member]
Represents a working capital loan.
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
New ROU Assets - Operating Leases
Senior Convertible Note [Member]
Represents a senior convertible note.
Alt Spain Holdco [Member]
Represents Alt Spain Holdco.
Bank Facility [Member]
Represents a bank facility.
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
alce_AssetRetirementObligationDiscountRate
Asset Retirement Obligation, Discount Rate
The discount rate used to estimate the present value of future cash flows related to ARO.
Line of Credit Facility, Lender [Domain]
alce_ContractualObligationMonthlyPayment
Contractual Obligation, Monthly Payment
The monthly payment toward the contractual obligation.
Maxim Group LLC [Member]
Represents Maxim Group LLC.
Warrant Liability
alce_OutOfPocketFeesReimbursed
Out of Pocket Fees Reimbursed
Represents the number of out of pocket fees reimbursed during the period.
Madrid, Spain Lease [Member]
Madrid, Spain Lease
alce_CommonStockConvertiblePercentageOfOutstandingCommonStock
Common Stock, Convertible, Percentage of Outstanding Common Stock
Represents the percentage of outstanding common stock used with convertible common stock.
Unbilled energy incentives
Amount classified as unbilled energy incentives attributable to disposal group held for sale or disposed of.
Lender Name [Axis]
Impairment loss recognized on the remeasurement to fair value less costs to sell
Impairment loss recognized on the remeasurement to fair value less costs to sell
Represent the amount of disposal group including discontinued operation impairment loss recognized on the remeasurement to fair value less costs to sell.
alce_DisposalGroupIncludingDiscontinuedOperationDevelopmentCosts
Development costs
Amount of development costs attributable to disposal group, including, but not limited to, discontinued operation.
Green bonds
Amount classified as green bonds attributable to disposal group held for sale or disposed of.
Operating leases, current – liabilities
Amount classified as other liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.
Operating leases, non-current - assets
Capital Leases, Long Term
Amount classified as other assets attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer.
alce_DisposalGroupIncludingDiscontinuedOperationNetAssets
Net assets/(liabilities) of discontinued operations
Amount of assets net liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer.
Operating leases, non-current - liabilities
Amount classified as other liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of beyond one year or the normal operating cycle, if longer.
Costs associated with legal actions for liabilities
Legal Fees
Costs associated with legal actions related to unpaid liabilities
Costs associated with legal actions related to unpaid liabilities
Line of Credit [Member]
alce_DisposalGroupIncludingDiscontinuedOperationAssetDisposalCosts
Costs related to disposal of asset
Amount of asset disposal costs attributable to disposal group, including, but not limited to, discontinued operation.
us-gaap_RepaymentsOfDebt
Repayments of Debt
Payments of debt principal
us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables
Accounts receivable and other short-term receivables
Weighted Average Discount Rate - Operating Leases
Proceeds from debt
Proceeds from Issuance of Debt
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)
Measurement Frequency [Axis]
Commitments and Contingencies Disclosure [Text Block]
Fair Value Hierarchy and NAV [Axis]
Common stock, shares issued (in shares)
Common Stock, Shares, Issued (in shares)
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Common stock, shares outstanding (in shares)
Common Stock, Shares, Outstanding (in shares)
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Common stock, shares authorized (in shares)
Common Stock, Shares Authorized (in shares)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Schedule of Accrued Liabilities [Table Text Block]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Common stock, $0.0001 par value, 2 billoin authorized as of December 31, 2025 and 300 million authorized as of December 31, 2024; 724,658 issued and outstanding as of December 31, 2025 and 25,189 issued and outstanding as of December 31, 2024.
Other non-current assets
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
us-gaap_TableTextBlock
Notes Tables
Permanent items
Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying statutory federal (national) tax rate to pretax income (loss) from continuing operation attributable to other reconciling item. Excludes state and local income tax expense (benefit), federal tax expense (benefit), statutory income tax expense (benefit) outside of country of domicile, tax credit, nondeductible expense, deduction, income tax settlement, income tax contingency, and cross-border tax law.
Computer Equipment [Member]
Asset basis differences
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from asset basis differences.
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive income/(loss) attributable to Alternus
us-gaap_StockIssuedDuringPeriodSharesPurchaseOfAssets
Stock Issued During Period, Shares, Purchase of Assets (in shares)
Subsequent Events [Text Block]
Concentration Risk Type [Axis]
Significant Accounting Policies [Text Block]
us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger
Non-cash operating lease assets
Operating lease liability, net of current portion
Operating lease liability
alce_NumberOfSharesUsedToDetermineConversionPrice
Number of Shares Used to Determine Conversion Price (in shares)
Represents the number of shares used to determine the conversion price of a convertible instrument.
The Two Thousand and Twenty Four Notes [Member]
Represents the 2024 notes.
Consolidation, Variable Interest Entity, Policy [Policy Text Block]
us-gaap_LongTermDebtCurrent
Current Maturities net of debt discount
alce_DisposalGroupIncludingDiscontinuedOperationSolisBondWaiverFee
Solis bond waiver fee
Amount of other expense attributable to disposal group, including, but not limited to, discontinued operation.
Concentration Risk Type [Domain]
Convertible Notes, April 2024, Warrant Liability [Member]
Convertible Notes, April 2024, Warrant Liability
us-gaap_LongTermDebtNoncurrent
Long-term maturities net of debt discount
alce_DiscountRateOnFeesAndOtherExpenses
Discount Rate on Fees and Other Expenses
Represents the discount rate on fees and other expenses.
alce_DebtInstrumentInterestRateInEventOfDefault
Debt Instrument, Interest Rate in Event of Default
Represents the interest rate of a debt instrument in the event of default.
Fourth Tranche [Member]
Represents the fourth tranche.
Income Tax Jurisdiction, Domestic State and Local [Member]
us-gaap_LongTermDebt
Debt
Third Tranche [Member]
Represents the third tranche.
Second Tranche [Member]
Represents the second tranche.
us-gaap_LossContingencyAccrualAtCarryingValue
Loss Contingency Accrual
Convertible note measured at fair value
Loss Contingencies [Table]
Statement of Stockholders' Equity [Abstract]
Statement of Cash Flows [Abstract]
us-gaap_ConvertibleNotesPayable
Convertible Notes Payable
Convertible Debt [Member]
Shareholders' Equity / (Deficit)
us-gaap_LossContingencyEstimateOfPossibleLoss
Loss Contingency, Estimate of Possible Loss
Equity Components [Axis]
Operating lease liabilities
Other non-current liabilities
Share-Based Payment Arrangement [Policy Text Block]
Equity Component [Domain]
us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)
Equity [Text Block]
us-gaap_ClassOfWarrantOrRightOutstanding
Class of Warrant or Right, Outstanding (in shares)
Outstanding, warrants (in shares)
Outstanding, warrants (in shares)
Additional Paid-in Capital [Member]
Retained Earnings [Member]
alce_DebtInstrumentOriginalIssueDiscountPercentageIncrease
Debt Instrument, Original Issue Discount, Percentage Increase
Represents the percentage increase of the original issue discount of a debt instrument.
Note Purchase Agreement, 2025 Note [Member]
Represents the 2025 note purchase agreement.
us-gaap_CostOfGoodsAndServicesSold
Cost of revenues
Note Purchase Agreement [Member]
Represents a note purchase agreement.
alce_DebtInstrumentOriginalIssueDiscount
Debt Instrument, Original Issue Discount
Represents the original issue discount percentage related to a debt instrument during the period.
alce_DebtInstrumentConversionPriceCommonStockVwapRate
Debt Instrument, Conversion Price, Common Stock Vwap Rate
Represents the common stock VWAP rate related to the conversion price of a debt instrument.
Secure Net Capital LLC [Member]
Represents Secure Net Capital LLC.
us-gaap_SettlementLiabilitiesCurrent
Settlement Liabilities, Current
Bess LLC [Member]
Represents Bess LLC.
alce_DebtInstrumentRepaymentPremiumPercentage
Debt Instrument, Repayment Premium Percentage
Represents the repayment premium percentage of a debt instrument.
Alternus Europe Ltd [Member]
Represents Alternus Europe Ltd.
SCAF and CLIN Business Combination [Member]
Represents the SCAF and CLIN business combination.
alce_DebtInstrumentBusinessCombinationAmountSettled
Debt Instrument, Business Combination, Amount Settled
Represents the amount of a debt instrument related to a business combination settled during the period.
Placement Agent Warrants [Member]
Represents placement agent warrants.
Subsequent Event Type [Domain]
alce_ProceedsOfGrossProceedsReceived
Proceeds of Gross Proceeds Received
Represents the proceeds of gross proceeds received during the period.
Investor Promissory Notes [Member]
Represents investor promissory notes.
Subsequent Event [Table]
Meteora Capital LLC [Member]
Represents Meteora Capital LLC.
Subsequent Event Type [Axis]
alce_OriginalIssueDiscountAndDefaultInterest
Original Issue Discount and Default Interest
Represents the amount of the original issue discount and default interest reported during the period.
Securities Purchase Agreement [Member]
Represents a securities purchase agreement.
Sale of Stock [Axis]
Second Investor Promissory Note [Member]
Represents the second investor promissory note.
Cost of Goods and Service [Policy Text Block]
Second Partial Tranche [Member]
Represents the second partial tranche.
Sunrise Development LLC [Member]
Represents Sunrise Development LLC.
SPAC Sponsor Capital Access [Member]
Represents SPAC sponsor capital access.
Subsidiary of LLC or LP [Table]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income, Extensible List, Not Disclosed [Flag]
CFGI LP [Member]
Represents CFGI LP.
Southern Point Capital Corporation [Member]
Represents Southern Point Capital Corporation.
Net income - discontinued operations
Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Table]
Orrick [Member]
Represents Orrick.
Restricted Common Stock [Member]
Represents restricted common stock.
alce_SettlementAgreementBeneficialOwnershipPercentageOfCommonStock
Settlement Agreement, Beneficial Ownership Percentage of Common Stock
Represents the beneficial ownership percentage of common stock used in a settlement agreement.
Hover Energy LLC [Member]
Represents Hover Energy LLC.
Foreign currency translation reserve
alce_DisposalGroupNumberOfParksSold
Disposal Group, Number of Parks Sold
Represents the number of parks sold related to a disposal group.
Current Liabilities
Current tax expense - continuing operations
us-gaap_LiabilitiesCurrent
Total Current Liabilities
Income from discontinued operations
us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss
alce_DisposalGroupCostsAssociatedWithSale
Disposal Group, Costs Associated With Sale
Represents the costs associated with the sale of a disposal group.
NETHERLANDS
alce_DisposalGroupPercentageOfGroupfRevenuesAccountedFor
Disposal Group, Percentage of Group Revenues Accounted For
Represents the percentage of revenues a disposal group accounted for during the period.
Solis Bond Company DAC [Member]
Represents Solis Bond Company DAC.
POLAND
Customer Concentration Risk [Member]
Product Liability Contingency [Table]
us-gaap_IncomeTaxesPaid
Taxes
ROMANIA
Tax Credit Carryforward [Table]
us-gaap_LitigationSettlementExpense
Litigation Settlement, Fee Expense
us-gaap_GainLossOnDispositionOfAssets1
Gain on disposal of assets
Gain on sale of assets
us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down
Customer Relationships [Member]
Revenue Benchmark [Member]
Lessee, Leases [Policy Text Block]
Other Commitments [Table]
Discontinued operations (in dollars per share)
us-gaap_PreferredStockConvertibleConversionPrice
Preferred Stock, Convertible, Conversion Price (in dollars per share)
us-gaap_DebtCurrent
Debt, Current
us-gaap_CashFDICInsuredAmount
Cash, FDIC Insured Amount
Debt Disclosure [Text Block]
Debt Conversion, Name [Domain]
Noncontrolling interest
Debt Conversion Description [Axis]
Use of Estimates, Policy [Policy Text Block]
us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
Stock Issued During Period, Value, Restricted Stock Award, Gross
Shares issued to AEG and AEG related
Stock Issued During Period, Value, New Issues
Lessee, Operating Leases [Text Block]
Stock compensation
us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
UNITED STATES
us-gaap_DebtInstrumentCarryingAmount
Long-Term Debt, Gross
Convertible Loan Note
Debt Instrument, Fair Value Disclosure
Conversion of Debt
Conversion of Debt
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
Preferred stock dividend
Shares Issuable from LiiON Acquisition
Stock Issued During Period, Value, Acquisitions
Current Assets
us-gaap_AssetsCurrent
Total Current Assets
Stock compensation (in shares)
Stock Compensation for Third Party Services (in shares)
Fair Value, Recurring and Nonrecurring [Table]
us-gaap_LitigationSettlementAmountAwardedToOtherParty
Litigation Settlement, Amount Awarded to Other Party
Shares issued to AEG and AEG related (in shares)
Stock Issued During Period, Shares, New Issues (in shares)
Conversion of Debt (in shares)
Debt Instrument, Name [Domain]
Shares Issuable from LiiON Acquisition (in shares)
Stock Issued During Period, Shares, Acquisitions (in shares)
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
us-gaap_DebtInstrumentInterestRateStatedPercentage
Debt Instrument, Interest Rate, Stated Percentage
us-gaap_DebtInstrumentInterestRateDuringPeriod
Debt Instrument, Interest Rate During Period
us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)
Related and Nonrelated Parties [Axis]
us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings
Preferred stock dividend
us-gaap_DebtInstrumentUnamortizedDiscount
Debt discount
us-gaap_StockIssuedDuringPeriodSharesReverseStockSplits
Effects of Reverse Stock Split (in shares)
Schedule of Long-Term Debt Instruments [Table]
Conversion of Note into Restricted Common Stock [Member]
Conversion of Note into Restricted Common Stock
Debt Instrument [Axis]
us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Net Cash (used in) Operating Activities
alce_PrepaidExpenseAndOtherAssetsExcludingOtherReceivablesCurrent
Total
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.
Cash Flows from Operating Activities
Cash Flows from Investing Activities:
Operating Leases of Lessee [Table Text Block]
Tabular disclosure on the operating leases of the lessee.
Cash Flows from Financing Activities:
us-gaap_SharesIssuedPricePerShare
Shares Issued, Price Per Share (in dollars per share)
us-gaap_PaymentsOfDebtIssuanceCosts
Payments of Debt Issuance Costs
Operating Lease - Operating Cash Flows (Liability Reduction)
The liability reduction on the operating lease.
alce_OperatingLeasePaymentsFixed
Operating Lease - Operating Cash Flows (Fixed Payments)
The fixed payments on the operating lease.
us-gaap_LitigationSettlementInterest
Litigation Settlement Interest
Accounting Policies [Abstract]
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
Measurement Input Type [Axis]
us-gaap_UnrecognizedTaxBenefits
Balance
Balance
us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Net income/(loss) attributable to common stock
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
Measurement Input, Expected Dividend Rate [Member]
Measurement Input, Expected Term [Member]
Gross increases – tax positions in current period
Gross increases – tax positions in prior periods
us-gaap_FairValueAdjustmentOfWarrants
Fair value movement of warrant liability
Fair value movement of warrant
Net loss
Net income/(loss)
Net Income (Loss)
Measurement Input, Price Volatility [Member]
Operating Expenses
Measurement Input, Share Price [Member]
Measurement Input Type [Domain]
Measurement Input, Risk Free Interest Rate [Member]
us-gaap_DerivativeLiabilityMeasurementInput
Derivative liability, measurement input
us-gaap_DebtConversionOriginalDebtAmount1
Debt Conversion, Original Debt, Amount
us-gaap_DebtInstrumentMeasurementInput
Debt Instrument, Measurement Input
us-gaap_DebtConversionConvertedInstrumentAmount1
Debt Conversion, Converted Instrument, Amount
Convertible Debt [Table Text Block]
us-gaap_DebtConversionConvertedInstrumentSharesIssued1
Debt Conversion, Converted Instrument, Shares Issued (in shares)
us-gaap_CostsAndExpenses
Total operating expenses
us-gaap_DeferredTaxAssetsGross
Total deferred tax assets
Net operating losses
alce_DisposalGroupIncludingDiscontinuedOperationOtherExpensesTotal
Total other expenses
Represents the amount of total other expenses reported from a disposal group, including discontinued operation during the period.
Accounting Standards Update and Change in Accounting Principle [Table]
us-gaap_DeferredTaxAssetsLiabilitiesNet
Net deferred taxes
us-gaap_DeferredTaxAssetsNet
Net deferred tax assets
us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherExpense
Other expense
Non-cash investing and financing activities:
us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense
Selling, general, and administrative
Alternus Energy Group Plc [Member]
Represents Alternus Energy Group Plc.
Stock basedd compensation
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Sale of Subsidiaries [Text Block]
Represents the entire disclosure of the sale of subsidiaries during the period.
Short secured debt
Represents the amount of short term secured debt included in the liabilities of a disposal group.
Disposal Group, Not Including Discontinued Operation, Assets and Liabilities of Subsidiary Sold [Table Text Block]
Represents the tabular disclosure of the assets and liabilities of a subsidiary sold that is reported as a disposal group that is not a discontinued operation during the period.
Operating leases, current liabilities
Represents the current portion of operating lease liabilities included in the liabilities of a disposal group.
us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent
Accrued liabilities
Accounts payable & accrued liabilities
us-gaap_InterestPaidCapitalized
Capitalized interest
alce_DisposalGroupNotDiscontinuedOperationCostsAssociatedWithSale
Disposal Group, Not Discontinued Operation, Costs Associated with Sale
Represents the amount of costs associated with the sale of a disposal group that is not considered a discontinued operation during the period.
us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayableCurrent
Accounts payable
Accounts payable
Other income/(expense):
us-gaap_DeferredTaxAssetsValuationAllowance
Deferred tax asset valuation allowance
us-gaap_NonoperatingIncomeExpense
Total other expenses
Deferred income
Operating leases, non-current liabilities
Represents the non current portion of operating lease liabilities reported under the liabilities of a disposal group.
Schedule of Variable Interest Entities [Table Text Block]
Net (gain)/loss on sale of net assets
Represents the amount of gain (loss) on the sale of the net assets of a disposal group.
Other Expenses
Other Noncash Expense
Conversion of SNC Outstanding Debt into Series D Preferred Stock [Member]
Represents the conversion of the outstanding SNC debt into series D preferred stock.
Conversion of Two Promissory Notes into Series E Convertible Preferred Stock [Member]
The conversion of two promissory notes into series E convertible preferred stock.
Assets in Netherlands [Member]
Represents assets in Netherlands.
us-gaap_DisposalGroupIncludingDiscontinuedOperationCash
Cash
Assets in Poland [Member]
Represents assets in Poland.
Supplemental Cash Flow Disclosure
Sale of Assets Held for Sale [Text Block]
Represents the entire disclosure of the sale of assets held for sale during the period.
Variable Interest Entity [Table]
Net (gain)/loss on sale of the subsidiaries
Represents the amount of gain (loss) on the sale of subsidiaries.
Aeg Mh 02 Limited [Member]
Represents the AEG MH 02 limited sale.
us-gaap_CommonStockConvertibleConversionPriceIncrease
Common Stock, Convertible, Conversion Price, Increase (in dollars per share)
Nonmonetary Transaction Type [Domain]
Nonmonetary Transaction Type [Axis]
CEO And Executive Director [Member]
Represents the CEO and executive director.
Four Current Independent Directors [Member]
Represents four current independent directors.
Warrant [Member]
us-gaap_WarrantsAndRightsOutstanding
Warrants and Rights Outstanding
Document Type
Document Information [Line Items]
us-gaap_LesseeOperatingLeaseTermOfContract
Lessee, Operating Lease, Term of Contract (Year)
Document Annual Report
Weighted Average Lease Term - Operating Leases (years) (Year)
Document Information [Table]
Revenue
us-gaap_BusinessAcquisitionsProFormaRevenue
Entity Interactive Data Current
Document Transition Report
Document Financial Statement Error Correction [Flag]
Weighted-average common stock outstanding, basic & diluted (in shares)
Net Income / (loss)
us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
us-gaap_DebtInstrumentTerm
Debt Instrument, Term (Year)
Derivative Instrument [Axis]
us-gaap_StockIssued1
Fair value of Series B Convertible Preferred shares issued for settlement of SAA
European Union [Member]
us-gaap_NotesIssued1
Debt assumed from related party
Short term convertible and non-convertible promissory notes, net of debt issuance costs
Notes Payable, Current
Long term convertible and non-convertible promissory notes, net of debt issuance costs
Title and Position [Domain]
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Income Tax Jurisdiction [Axis]
ICFR Auditor Attestation Flag
Depreciation and accretion
Depreciation, amortization, and accretion
Document Fiscal Period Focus
Customer [Domain]
Corporate Joint Venture [Member]
Document Fiscal Year Focus
Investment, Name [Domain]
Amendment Flag
Employee [Member]
Represents an employee.
Clo [Member]
Represents the CLO.
Common Stock [Member]
Document Period End Date
Four Third Party Debt Holders [Member]
Represents four third party debt holders.
Long-Lived Asset, Class [Domain]
Legal Entity [Axis]
us-gaap_FinancialLiabilitiesFairValueDisclosure
Total
Assure Power, LLC [Member]
Represents Assure Power, LLC.
Entity File Number
Entity Tax Identification Number
Entity [Domain]
Entity Central Index Key
Entity Registrant Name
Entity Well-known Seasoned Issuer
Software, Internally Developed [Member]
Entity Current Reporting Status
Entity Voluntary Filers
Entity Incorporation, State or Country Code
alce_SharebasedCompensationArrangementBySharebasedPaymentAwardVotingRightsPercentage
Share-Based Compensation Arrangement by Share-Based Payment Award, Voting Rights, Percentage
Represents the percentage of voting rights under a share-based payment arrangement.
Twenty Twenty Three Equity Incentive Plan [Member]
Represents the 2023 equity incentive plan.
Current Fiscal Year End Date
us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration
Entity Public Float
Entity Ex Transition Period
Entity Filer Category
Entity Shell Company
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Business Combination, Recognized Liability Assumed, Liability
alce_PolicyTable
Entity Emerging Growth Company
Entity Small Business
us-gaap_OperatingIncomeLoss
Income/(Loss) from operations
Issued, weighted average exercise price (in dollars per share)
Represents the weighted average exercise price per share of warrants or rights issued during period.
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedIncomeTaxesPayable
Taxes payable
Other current liabilities
Other current liabilities
Other current liabilities
alce_ClassOfWarrantOrRightOutstandingWeightedAverageExercisePrice
Outstanding, weighted average exercise price (in dollars per share)
Outstanding, weighted average exercise price (in dollars per share)
Represents the weighted average exercise price for outstanding warrants or rights.
Other current assets
Other current assets
Cash & cash equivalents
Cash and cash equivalents
Issued during the year (in shares)
Class of Warrant or Right, Issued During Period (in shares)
Represents the number of warrants or rights issued during period.
Accounts receivable, net
Exercisable, warrants (in shares)
Represents the number of warrants or rights exercisable during the period.
Total Consideration
Total consideration
Entity Address, State or Province
Issued, weighted average remaining contractual term (Year)
Represents the weighted average remaining contractual term of warrants or rights issued during the period.
Entity Address, City or Town
Warrant liability
alce_ClassOfWarrantOrRightOutstandingWeightedAverageRemainingContractualTerm
Outstanding, weighted average remaining contractual term (Year)
Outstanding, weighted average remaining contractual term (Year)
Represents the weighted average remaining contractual term of warrants or rights outstanding.
Entity Address, Address Line One
Exercisable, weighted average exercise price (in dollars per share)
Represents the weighted average exercise price of warrants or rights exercisable.
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
City Area Code
Local Phone Number
Entity Address, Postal Zip Code
Warrants [Member]
Represents Warrants
Exercisable, weighted average remaining contractual term (Year)
Represents the weighted average remaining contractual term of warrants or rights exercisable.
OASIS Software contributed to JV at fair value
Preferred Stock [Member]
Title of 12(b) Security
Trading Symbol
Related Party Transaction [Domain]
Entity Common Stock, Shares Outstanding
Related Party Transaction [Axis]
Chief Executive Officer [Member]
Director [Member]
Loss attributable to noncontrolling interest
Net Income (Loss) Attributable to Noncontrolling Interest
Net income (loss)
us-gaap_ProfitLoss
Net income/(loss)
Net income/(loss)
us-gaap_LitigationReserveCurrent
Estimated Litigation Liability, Current
Scenario [Axis]
EBITDA
Adjusted EBITDA
Represents earnings before interest, taxes, depreciation and amortization (EBITDA).
Scenario [Domain]
Forecast [Member]
alce_ShareholderOwnershipPercentage
Shareholder Ownership, Percentage
Represents the percentage of shareholder ownership.
Clean Earth Acquisitions Sponsor [Member]
Represents Clean Earth Acquisitions Sponsor.
Nordic Esg [Member]
Represents Nordic ESG.
Investment, Name [Axis]
Debt Restructuring Costs
Debt restructuring costs
Debt restructuring costs
The amount of debt restructuring costs.
Series B Convertible Preferred Stock issued to Hover
Fair value of 20,000 Series B Convertible Preferred Shares
us-gaap_OtherLiabilities
Other Liabilities
Basis of Accounting, Policy [Policy Text Block]
Capitalized development costs subsumed
Hoover [Member]
Related to Hoover.
us-gaap_OtherNonoperatingIncome
Other income
us-gaap_OtherNonoperatingIncomeExpense
Other expense
us-gaap_OtherNonoperatingExpense
Other expense
Loss on settlement of SAA with Hover
Loss on settlement of SAA with Hover
Loss on settlement of SAA with Hover
The amount of loss from settlement.
Impairment for amounts due from related party
The amount of impairment of amounts due from related party.
alce_AmountToBeRepaidInCash
Amount to be Repaid in Cash
The amount to be repaid in cash.
alce_ValueOfRestitution
Value of Restitution
The value of restitution.
alce_LossOnSettlementOfLiability
Loss on Settlement of Liability
The amount of loss from settlement of liability.
us-gaap_Assets
Total for Europe – Continuing Operations
Total Assets
alce_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityExtinguishments
Loss from extinguishment of debt
Amount of extinguishments of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.
Spanish Assets [Member]
Related to Spanish assets.
OID Notes [Member]
Related to OID Notes.
Auditor Firm ID
Professional Consulting Agreement [Member]
Represents a professional consulting agreement.
Auditor Name
Geographical [Domain]
Consulting Agreement [Member]
Represents a consulting agreement.
Auditor Location
Geographical [Axis]
alce_IncreaseInProfessionalFeesPerMonth
Increase in Professional Fees Per Month
Represents the amount of increase in professional fees per month during the period.
Total Notes [Member]
Related to total notes.
alce_AssetsContributedForAquisition
Assets Contributed for Aquisition
The value of assets contributed for acquisition.
alce_CostsPreviouslyCapitalizedSubsumedForAcquisition
Costs Previously Capitalized Subsumed for Acquisition
The value of costs previously capitalized subsumed for acquisition.
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]
April and October Convertible Notes [Member]
Represents the April and October convertible notes.
Deemed issuance for EverOn transaction
Amount of increase (decrease) in additional paid in capital (APIC) related to deemed consideration in a business acquisition.
Loss on extinguishment of debt
alce_LossOnExtinguishmentOfDebt
Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.
Net income/(loss) from discontinued operations
Income/(loss) from discontinued operations, net of tax
Represents Remuneration in Respect to Long-Term Incentive Schemes with Restricted Shares [Member]
Represents remuneration in respect to long-term incentive schemes with restricted shares.
Remuneration in Respect of Services of Directors [Member]
Represents remuneration in respect of services of directors.
Net loss - continuing operations
alce_DebtInstrumentOriginalIssueDiscountPercentage
Debt Instrument, Original Issue Discount Percentage
Represents the original issue discount percentage of a debt instrument.
alce_AccruedLegalFees
Accrued Legal Fees
Represents the amount of accrued legal fees.
Customer [Axis]
Term Loans [Member]
Relating to term loans.
alce_GainOnExtinguishmentOfDebt
Gain on extinguishment of debt
Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.
Payable to/from related party
The increase (decrease) during the reporting period in the aggregate amount of obligations to be paid to (received from) the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entities' management; an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence.
The 2024 Convertible Notes [Member]
Relating to the 2024 Convertible Notes.
Director's Remuneration [Member]
Relating to directors' remuneration.
Modified Notes [Member]
Relating to modified notes.
us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold
Cost of revenues
us-gaap_FinitelivedIntangibleAssetsAcquired1
Finite lived intangible assets
Consolidation, Policy [Policy Text Block]
us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense
Disposal Group, Including Discontinued Operation, Interest Expense
Interest expense
Disposal Group Name [Domain]
Gain on sale of discontinued operations, net assets
Foreign currency translation reserve
us-gaap_DisposalGroupIncludingDiscontinuedOperationForeignCurrencyTranslationGainsLosses
Comprehensive income/(loss) attributable to noncontrolling interest
Europe – Discontinued Operations
Revenues
Disposal Group, Including Discontinued Operation, Revenue
us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Comprehensive income/(loss)
us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense
Total operating expenses
us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Total Shareholders' Equity / (Deficit)
Balance
Balance
Disposal Groups, Including Discontinued Operations [Table]
Disposal Group Name [Axis]
Alt Alliance Llc [Member]
Represents Alt Alliance LLC.
us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Disposal Group, Including Discontinued Operation, Consideration
Parent [Member]
EverOn Energy LLC [Member]
Represents EverOn Energy LLC.
Noncontrolling Interest [Member]
Deferred tax liabilities:
us-gaap_ValueAddedTaxReceivableCurrent
Taxes recoverable
Microgrid Projects With Hover Energy [Member]
Represents microgrid projects with Hover Energy.
Award Timing MNPI Disclosure [Text Block]
ecd_AwardTmgMnpiCnsdrdFlag
Award Timing MNPI Considered [Flag]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
us-gaap_PaymentsForLegalSettlements
Payments for Legal Settlements
Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table]
Other liabilities
Majority Buyer [Member]
Represents the majority buyer.
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
alce_SharePurchaseAgreementPercentageOfOwnershipAfterAgreement
Share Purchase Agreement, Percentage of Ownership After Agreement
Represents the percentage of ownership after a share purchase agreement.
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Statistical Measurement [Axis]
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Minority Buyer [Member]
Represents the minority buyer.
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Trading Arrangements, by Individual [Table]
Material Terms of Trading Arrangement [Text Block]
ecd_InsiderTrdPoliciesProcAdoptedFlag
Insider Trading Policies and Procedures Adopted [Flag]
Long-Lived Asset, Including Intangible Asset and Goodwill, Impairment and Disposal [Policy Text Block]
Minimum [Member]
Product and Service, Other [Member]
Statistical Measurement [Domain]
Insider Trading Policies and Procedures [Line Items]
Maximum [Member]
us-gaap_SharePrice
Share Price (in dollars per share)
Litigation Case [Domain]
Counterparty Name [Axis]
Change of Valuation Allowance, percent
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Actual income tax expense (benefit), percent
Federal tax rate
Differences in statutory tax rates, percent
True up of DTA due to disposal of subsidiaries, percent
Income Tax Jurisdiction [Domain]
Litigation Case [Axis]
State income taxes, net of federal benefit, percent
Counterparty Name [Domain]
alce_DevelopmentCost
Development Cost
The value of development cost.
Adjustments to reconcile loss from continuing operations to net cash provided by/(used in) operations:
Plan Name [Axis]
Plan Name [Domain]
us-gaap_WarrantsAndRightsOutstandingTerm
Warrants and Rights Outstanding, Term (Year)
us-gaap_LossContingencyDamagesAwardedValue
Loss Contingency, Damages Awarded, Value
us-gaap_AllocatedShareBasedCompensationExpense
Share-Based Payment Arrangement, Expense
Property, plant, and equipment, net
Title and Position [Axis]
Stock compensation costs
Subsequent Event [Member]
Finite lived intangible assets, useful life (Year)
us-gaap_FiniteLivedIntangibleAssetUsefulLife
Finite-Lived Intangible Asset, Useful Life (Year)
Preferred stock, shares issued (in shares)
Preferred Stock, Shares Issued (in shares)
Europe [Member]
Preferred stock, shares oustanding (in shares)
Preferred Stock, Shares Outstanding (in shares)
Preferred stock, shares authorized (in shares)
Preferred Stock, Shares Authorized (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares)
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share (in dollars per share)
MH02 Note [Member]
Related to MH02 Note.
New Accounting Pronouncements, Policy [Policy Text Block]
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Antidilutive Securities, Name [Domain]
Statement [Table]
Operating Activities [Axis]
Reclassification, Comparability Adjustment [Policy Text Block]
Continuing Operations [Member]
Discontinued Operations [Member]
Scenario, Plan [Member]
alce_ObligationToPurchaseProjectAtMarketValueMinimumPerMegawatt
Obligation to Purchase Project at Market Value, Minimum Per Megawatt
The amount of obligation to purchase project at market value, minimum per megawatt.
Operating Activities [Domain]
Credit Facility [Axis]
Credit Facility [Domain]
Income Tax Authority, Name [Axis]
Long-term prepaid expenses
Income Tax Authority, Name [Domain]
us-gaap_DeferredTaxLiabilitiesInvestments
Investment in EverOn
Revenue Commissioners, Ireland [Member]
us-gaap_GainLossOnSaleOfBusiness
Gain (Loss) on Disposition of Business
us-gaap_EquityMethodInvestmentOwnershipPercentage
Equity Method Investment, Ownership Percentage
Long-Term Debt, Type [Axis]
Stock Compensation for Third Party Services
Stock Issued During Period, Value, Issued for Services
Shares issued to 3rd parties for Services (in shares)
Stock Issued During Period, Shares, Issued for Services (in shares)
Product and Service [Domain]
Product and Service [Axis]
Ownership [Axis]
Ownership [Domain]
us-gaap_PropertyPlantAndEquipmentUsefulLife
Property, Plant, and Equipment, Useful Life (Year)
Consolidated Entities [Axis]
Consolidated Entities [Domain]
Statement [Line Items]
Interest expense carryforward
us-gaap_ExtinguishmentOfDebtAmount
Extinguishment of Debt, Amount
us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Proceeds from Issuance or Sale of Equity
Fair Value of Financial Instruments, Policy [Policy Text Block]
Gain on settlement of liabilities
Gain on settlement of liabilities
The amount of gain on settlement of liabilities.
Finite lived intangible assets, annual amortization
Finite-Lived Intangible Asset, Expected Amortization, Year One
us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)
us-gaap_InterestPayableCurrentAndNoncurrent
Interest Payable
Accounts payable
Accounts Payable, Current
FV change and interest of convertible notes
Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to the change in interest on convertible notes.
Warrant
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to warrants.
Stock issuance costs
Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to stock issuance costs.
Other equity expenses
Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to other equity expenses.
alce_TaxesRecoverableCurrent
Taxes recoverable
Amount of taxes recoverable that provide economic benefits within a future period of one year or the normal operating cycle, if longer.
Other Foreign Countries Tax Authorities [Member]
Represents the other foreign countries tax authorities.
alce_GainLossOnExtinguishmentOfLiabilities
Net gain on settlement of liabilities
The amount of gain (loss) on the extinguishment of liabilities.
Notes reclassified upon reevaluation of embedded features
Represents the amount of liability reclassified upon reevaluation of embedded features on a recurring basis with fair value measurements with unobservable inputs.
Reclass of accrued interest to convertible note
Represents the amount of accrued interest liability on a recurring basis with fair value measurements with unobservable inputs.
us-gaap_ProceedsFromIssuanceOfWarrants
Proceeds from Issuance of Warrants
Warrant, percent
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to warrants.
Uncertain Tax Positions, percent
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to uncertain tax positions.
Other equity expenses, percent
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other equity expenses.
FV change and interest of convertible notes, percent
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in interest of convertible notes.
Disposal Group Classification [Axis]
Uncertain Tax Positions
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to change in uncertain tax positions.
Disposal Group Classification [Domain]
Stock issuance costs, percent
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to stock issuance costs.
Non taxable items due to disposal of entity
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the disposal of an entity.
Payroll
Legal fees
Non taxable items due to disposal of entity, percent
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the disposal of an entity.
us-gaap_AccruedRentCurrent
Accrued Rent, Current
Debt Cancellation Income related to loan not historically deducted
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to debt cancellation.
us-gaap_AccruedLiabilitiesCurrent
Total
Accrued liabilities
Debt Cancellation Income related to loan not historically deducted, percent
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to debt cancellation.
Subsequent Secured Promissory Notes Sold in Subscription Agreements [Member]
Represents subsequent secured promissory notes sold in subscription agreements.
Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block]
Related Party [Member]
Schedule of Related Party Transactions [Table Text Block]
Other expenses
Interest on debt
Interest Payable, Current
Taxes payable
Less: Taxes payable
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Balance
Balance
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Income Tax Jurisdiction, Domestic Federal [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Sales of property and equipment
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
Movement in fair value
Intangible Asset, Finite-Lived, Class [Axis]
Intangible Asset, Finite-Lived, Class [Domain]
Class of Warrant or Right [Axis]
Class of Warrant or Right [Domain]
Long-Term Debt, Type [Domain]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Inputs, Level 1 [Member]
Income Tax Jurisdiction, Foreign [Member]
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Property, Plant and Equipment, Impairment [Policy Text Block]
us-gaap_ProvisionForDoubtfulAccounts
Provision for loss from related party
Provision for loss from related party
Property, Plant, and Equipment [Policy Text Block]
Furniture and Fixtures [Member]
Fair Value Option, Disclosures [Table]
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
Substantial Doubt about Going Concern [Text Block]
Liability for Future Policy Benefit Activity [Table]
us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net Cash provided by Financing Activities
us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Net Cash (used in) Investing Activities
Net Cash (used in) Financing Activities - Discontinued Operations
Net Cash provided by Operating Activities - Discontinued Operations
Net Cash provided by Investing Activities - Discontinued Operations
us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Intangible Asset, Finite-Lived, Accumulated Amortization
Gain on disposal of assets
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Loss before provision for income taxes
Loss on extinguishment of debt
Gain (Loss) on Extinguishment of Debt
Additional paid in capital
Total Fair Value of Invested Capital
Joint Venture Formation, Fair Value of Joint Venture
Discontinued Operations, Disposed of by Sale [Member]
Noncash or Part Noncash Acquisitions by Unique Description [Axis]
Prepaid expenses and other current assets
Prepaid expenses and other current assets
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of property and equipment
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
Accounting profit before tax
Class of Stock [Domain]
Share-based compensation to third parties
Noncash or Part Noncash Acquisition, Name [Domain]
us-gaap_GoodwillImpairmentLoss
Goodwill, Impairment Loss
Settlement of Payables for Shares [Member]
Represents the settlement of payables for shares.
us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
Intangible Asset, Excluding Goodwill, Impairment Loss
November 2025 Note [Member]
Represents the November 2025 note.
September 2025 Note [Member]
Represents the September 2025 note.
alce_VotingSharesPercentage
Voting Shares, Percentage
The number of voting shares owned at a given time expressed as a percentage of total voting shares.
us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Accounts Receivable, Allowance for Credit Loss, Current
Trade and Other Accounts Receivable, Unbilled Receivables, Policy [Policy Text Block]
May 2025 Note [Member]
Represents the May 2025 note.
Accounts Receivable [Policy Text Block]
Secured Promissory Notes Sold in Subscription Agreements [Member]
Represents secured promissory notes sold in subscription agreements.
alce_BeneficialOwnershipMaximum
Beneficial Ownership, Maximum
The maximum required percentage of beneficial ownership of common stock following the conversion.
Continuing operations (in dollars per share)
Loss from continuing operations
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent
Loss from continuing operations
alce_DebtInstrumentCovenantCapitalRaise
Debt Instrument, Covenant, Capital Raise
A debt instrument covenant pertaining to the amount of capital raised.
Income Statement [Abstract]
Series C Convertible Preferred Stock [Member]
Represents Series C Convertible Preferred Stock.
alce_PutOptionAgreementCovenantPriceOfRepurchasedShares
Put Option Agreement, Covenant, Price of Repurchased Shares (in dollars per share)
The price of repurchased shares as part of the put option agreement.
Series E Convertible Preferred Stock [Member]
Represents the Series E Convertible Preferred Stock.
Income/(Loss) before provision for income taxes
us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax
Loss from operations of discontinued business components
alce_PutOptionAgreementCovenantEquityRaise
Put Option Agreement, Covenant, Equity Raise
A covenant for the put option agreement detailing the equity raise requirement.
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Series D Convertible Preferred Stock [Member]
Represents Series D Convertible Preferred Stock.
alce_PutOptionAgreementCovenantSharesRepurchased
Put Option Agreement, Covenant, Shares Repurchased (in shares)
The number of shares that may be repurchased as part of the put option agreement.
us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Income/(loss) from discontinued operations
alce_PutOptionAgreementCovenantPeriodOfTime
Put Option Agreement, Covenant, Period of Time (Year)
The period of time over which the put option agreement is in place.
Discontinued operations:
Third Investor Promissory Note [Member]
Third Investor Promissory Note
September 2025 Notes [Member]
September 2025 Notes
alce_DevelopmentCostsSubsumed
Development Costs Subsumed
The amount of development costs subsumed as part of the joint venture formation.
Income Tax Contingency [Table]
Conversion of Notes into Series C Convertible Preferred Stock [Member]
Represents the conversion of notes into Series C Convertible Preferred Stock.
Nicholas Parker [Member]
Represents Nicholas Parker.
alce_DebtInstrumentMinimumEquityFinancingCovenant
Debt Instrument, Minimum Equity Financing Covenant
The minimum equity financing that must be closed as a covenant of the debt instrument.
alce_OwnershipPercentage
Ownership Percentage
Percentage of ownership.
us-gaap_IncomeTaxExaminationPenaltiesAccrued
Income Tax Examination, Penalties Accrued
alce_ClassOfWarrantOrRightIssued
Class of Warrant or Right, Issued (in shares)
The number of warrants or rights issued.
Favorable Contracts [Member]
Represents favorable contracts.
Debt issuance cost of convertible debt
Amortization of Debt Issuance Costs
us-gaap_AmortizationOfIntangibleAssets
Intangible Asset, Finite-Lived, Amortization Expense
Subscription Agreements [Member]
Subscription Agreements
Deemed dividend to preferred shareholder
The deemed dividends to preferred shareholders.
Income taxes
Income tax
Fractional shares rounddown from reverse split (in shares)
The amount of fractional shares rounddown from reverse stock splits.
Series B Convertible Preferred Stock [Member]
Represents Series B Convertible Preferred Stock.
Accredited Debt Holder [Member]
Represents accredited debt holder.
MH02 and Italian SPV's [Member]
Represents information pertaining to MH02 and Italian SPV's.
Deferred tax assets:
Rescission of the Liion Transaction [Member]
Represents information pertaining to the rescission of the Liion transaction.
alce_OperatingLeaseAnnualCost
Operating Lease, Annual Cost
Amount of annual cost of operating lease.
us-gaap_PrepaymentFeesOnAdvancesNet
Prepayment Fees on Advances, Net
United States Office Lease [Member]
Represents United States office lease.
Morgan Franklin Consulting LLC [Member]
Represents Morgan Franklin Consulting LLC.
alce_NoncashInvestingAndFinancingActivitiesSharesIssuedInSettlementOfDebtAndOtherLiabilities
Shares issued in settlement of debt and other liabilities
The shares issued in the settlement of debt and other liabilities for noncash investing and financing activities.
us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
alce_DisposalGroupIncludingDiscontinuedOperationGainLossOnDisposal
(Gain) on disposal
(Gain) on disposal
The amount of gain (loss) on disposal, held in disposal group.
alce_DisposalGroupIncludingDiscontinuedOperationOperatingLeasesCurrent
Operating Leases Short Term
The current operating leases, held in disposal group.
alce_DisposalGroupIncludingDiscontinuedOperationNonconvertibleDebtCurrrent
Non-Convertible Debt, Short Term
The amount of current non-convertible debt, held in disposal group.
alce_DisposalGroupIncludingDiscontinuedOperationGainLossOnForeignCurrencyExchangeRates
Gain (loss) on foreign currency exchange rates
The amount of gain (loss) on foreign currency exchange rates, held in disposal group.
Income Tax Disclosure [Text Block]
alce_DisposalGroupIncludingDiscontinuedOperationDueFromtoRelatedParties
Due from/to related parties
Due from / to related parties
The amount due from/to related parties, held by a disposal group.
alce_DisposalGroupIncludingDiscontinuedOperationCapitalizedCosts
Capitalized costs
The amount of capitalized costs, held by a disposal group.
alce_EquityOfferingMaximumAmount
Equity Offering, Maximum Amount
Maximum amount of equity offering.
us-gaap_StockholdersEquityPeriodIncreaseDecrease
Stockholders' Equity, Period Increase (Decrease)
alce_DisposalGroupIncludingDiscontinuedOperationNetTaxesRecoverable
Net Taxes Recoverable
Amount of net taxes recoverable, held by a disposal group.
alce_BusinessCombinationCapitalizedCostsContributed
Capitalized costs contributed
The amount of capitalized costs contributed for business combinations.
alce_BusinessCombinationFairValueOfNoncontrollingInterestContributed
Fair value of noncontrolling interest contributed for 49% of EverOn
The amount of fair value of noncontrolling interests contributed in a business combination.
alce_RecissionOfNonconvertibleDebtNoncurrent
Non-Convertible Debt, Long Term
The amount rescinded from noncurrent, non-convertible debt.
alce_GainLossOnRescissionOfTransaction
Loss on transaction
The amount of gain/loss from the rescission of transactions.
alce_RescissionOfAccountsPayable
Accounts payable
The amount rescinded from accounts payable.
alce_RescissionOfNonconvertibleDebtShortTerm
Non-Convertible Debt, Short Term , net of debt discount
The amount rescinded from non-convertible short-term debt.
Income Tax, Policy [Policy Text Block]
alce_RescissionOfIntangibleAssets
Intangible assets
The amount of rescission for intangible assets.
Tax effect of differences in foreign tax rates
Tax at the applicable rate of 21%
us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Current tax expense - discontinued operations
Amount of current income tax expense (benefit) pertaining to taxable income (loss) from discontinued operations.
True up of DTA due to disposal of subsidiaries
Impairment of asset
Impairment of Spanish assets
Impairment of assets
alce_CurrentIncomeTaxExpenseBenefitContinuedAndDiscontinuedOperations
Actual income tax expense (benefit)
Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations and discontinued operation.
Tax at the applicable rate of 21%
alce_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRateAmount1
Other
alce_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowanceAmount1
Change in valuation allowance
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.
alce_BusinessCombinationOasisSystemContributedInAdditionalPaidinCapital
OASIS system contributed as Additional paid in capital
The amount contributed to additional paid-in capital from the OASIS system in a business combination.
Approximate [Member]
Represents approximate.
Related party transactions
us-gaap_RelatedPartyTransactionAmountsOfTransaction
Related Party Transaction, Amounts of Transaction
Related and Nonrelated Parties [Domain]
us-gaap_AssetRetirementObligation
Asset Retirement Obligation
us-gaap_DeferredFinanceCostsNet
Debt Issuance Costs, Net
Related Party Transaction [Table]
Related Party Transactions Disclosure [Text Block]
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
State income taxes, net of federal benefit
Asset Retirement Obligation [Policy Text Block]
Other
us-gaap_IncomeTaxReconciliationOtherAdjustments
us-gaap_RepaymentsOfAssumedDebt
Repayments of Assumed Debt
Fair Value Hierarchy and NAV [Domain]
Measurement Frequency [Domain]
Total assets sold
Total discontinued operations assets
Statement of Financial Position [Abstract]
Asset Sold under Agreement to Repurchase [Table]
Change in fair value
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
us-gaap_OtherAssets
Other Assets
Fair Value, Recurring [Member]
us-gaap_OtherAssetsNoncurrent
Total
us-gaap_ConvertibleDebt
Convertible Debt
us-gaap_ConcentrationRiskPercentage1
Concentration Risk, Percentage
alce_MaximumConversionPrice
Maximum Conversion Price (in dollars per share)
Represents the maximum conversion price.
alce_MaximumBenchmarkAmountForRepaymentOfDebt
Maximum Benchmark Amount for Repayment of Debt
Represents the maximum benchmark amount used for the repayment of debt.
alce_InitialPaymentOnProject
Initial Payment On Project
Represents the amount of initial payment paid on a project during the period.
alce_CashPlacementAgencyFeeAmount
Cash Placement Agency Fee Amount
Represents the amount of cash placement agency fee amount paid during the period.
Antidilutive securities (in shares)
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities [Axis]
Conversion of Note Into Shares [Member]
Represents the conversion of a note into shares.
alce_BeneficiallyOwnershipPercentage
Beneficially Ownership Percentage
Represents the beneficially ownership percentage.
us-gaap_DepreciationAndAmortizationDiscontinuedOperations
Depreciation, amortization, and accretion
Convertible Debt, Fair Value Adjustment
Convertible Debt, Fair Value Adjustment
Fair value movement of convertible debt
Represents the amount of adjustment to convertible debt during the period.
Basic & diluted loss per share of common stock:
alce_PercentageOfFaceValueOfNote
Percentage of Face Value of Note
Represents the percentage of the face value of a note.
Conversion of Note Into Common Stock [Member]
Represents the conversion of a note into common stock.
The Warrant [Member]
Represents the warrant.
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
us-gaap_EarningsPerShareBasic
Total earnings/(loss) per share of common stock, basic & diluted (in dollars per share)
Effective Income Tax Rate Reconciliation [Table]
Capitalized development costs
Represents the amount of capitalized development costs.
Fair value movement of FPA asset
Fair value movement of FPA asset
Fair value movement of FPA asset
Represents the amount of fair value adjustment to FPA assets during the period.
Project [Domain]
alce_ProceedsFromIssuanceOfDebtExpected
Proceeds from Issuance of Debt Expected
Represents the amount of proceeds from the issuance of debt expected during the period.
Earnings Per Share, Policy [Policy Text Block]
Investor Promissory Notes, Second Tranche [Member]
Represents the investor promissory notes second tranche.
Investor Promissory Notes, First Tranche [Member]
Represents the investor promissory notes first tranche.
Intangible assets, net
Intangible assets
alce_PaymentsOfConstructionInProcess
Construction in Process
Represents the payments of construction in process during the period.
Amortization of debt discount
alce_PaymentsOfCostsCapitalized
Capitalized Cost
Represents the amount of payments of costs capitalized during the period.
Finite lived intangible assets
us-gaap_FiniteLivedIntangibleAssetsNet
Finite-Lived Intangible Assets, Net
us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Stockholders' Equity Note, Stock Split, Conversion Ratio
alce_GainLossOnRecission
Gain (Loss) on Recission
Represents the gain (loss) on recission during the period.
LiiON [Member]
Represents LiiON.
Microgrid Projects With Hover Energy in the US [Member]
Represents microgrid projects with Hover Energy in the US.
Goodwill
Goodwill
Goodwill
alce_CapitalizedDevelopmentCost
Capitalized Development Cost
Represents the amount of capitalized development cost.
Warrant Liability [Member]
Represents a warrant liability.
Joint Venture [Member]
Represents a joint venture.
Alt Spain Hold Shares [Member]
Represents Alt Spain Hold Shares.
Audit Fees
Represents current accrued audit fees.
Italian Projects [Member]
Represents Italian projects.
Tax penalties
Represents current accrued tax penalties.
Business Combination [Domain]
Amounts due to AEG not acquired
Represents amounts due and not acquired attributable to a disposal group held for sale or disposed of.
Short term convertible & non-convertible notes
Represents the amount classified as short term convertible and nonconvertible notes attributable to a disposal group held for sale or disposed of.
Conversion of Note into Unrestricted Common Stock [Member]
Represents the conversion of a note into unrestricted common stock.
Business Combination [Axis]
Reverse Stock Split [Member]
Represents a reverse stock split.
Disaggregation of Revenue [Table Text Block]
Ownership percentage, business acquisition
Capitalized development costs
alce_DisposalGroupIncludingDiscontinuedOperationCapitalizedDevelopmentCosts
Represents the amount classified as capitalized development costs attributable to disposal group held for sale or disposed of.
alce_SaleOfAssetsMinimumPrice
Sale of Assets, Minimum Price
Represents the minimum price in the sale of assets.
alce_PreferredStockSharesDesignatedIncrease
Preferred Stock, Shares Designated, Increase (in shares)
Represents the increase in preferred stock shares designated.
Business Combination [Policy Text Block]
Foreign currency translation adjustment
Foreign currency translation adjustment
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
alce_PreferredStockSharesDesignated
Preferred Stock, Shares Designated (in shares)
Represents the number of preferred stock shares designated.
Business Combination [Table]
alce_ConsultingMonthlyFee
Consulting Monthly Fee
Represents the amount of a consulting monthly fee.
alce_PreferredStockVotesPerShare
Preferred Stock, Votes Per Share
Represents the number of votes per share of preferred stock.
Business Combination, Pro Forma Information [Table Text Block]
Conversion of Promissory Note into Common Stock [Member]
Represents the conversion of a promissory note into common stock.
alce_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantPercentageOfSharesOutstanding
Share Based Compensation Arrangement By Share Based Payment Award, Number of Shares Available for Grant, Percentage of Shares Outstanding
Represents the percentage of shares outstanding under a share based compensation arrangement.
alce_OwnershipSoldPercentage
Ownership Sold Percentage (in dollars per share)
Represents the percentage of ownership sold.
Hover [Member]
Represents Hover.
us-gaap_InterestExpenseDebt
Interest Expense, Debt
us-gaap_InterestExpenseNonoperating
Interest expense
Interest expense
Accumulated deficit
Retained Earnings (Accumulated Deficit)
Conversion of Debt Into Preferred Stock [Member]
Represents the conversion of debt into preferred stock.
Capitalized Contract Cost [Table]
us-gaap_DebtInstrumentConvertibleConversionPrice1
Debt Instrument, Convertible, Conversion Price (in dollars per share)
Class of Stock [Axis]
Revenue [Policy Text Block]
us-gaap_ProceedsFromDebtNetOfIssuanceCosts
Proceeds from Debt, Net of Issuance Costs
alce_PreferredStockStatedValue
Preferred Stock, Stated Value (in dollars per share)
Represents the stated value of preferred stock.
Equity, Capital Unit or Share [Table]
Long-Lived Asset, Held-for-Sale [Table]
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share (in dollars per share)
New convertible notes issued at fair value
Schedule of Other Assets, Noncurrent [Table Text Block]
Derivative Contract [Domain]
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
Conversions
Long-Lived Asset, Class [Axis]
Sale of Stock [Domain]
Deferred Charges, Policy [Policy Text Block]
Cash and cash equivalents
us-gaap_InvestmentOwnedBalanceShares
Investment Owned, Balance, Shares (in shares)
us-gaap_InterestPaidNet
Interest (net of capitalized interest of $2,792 and $397 respectively)
Schedule of Long-Term Debt Instruments [Table Text Block]
Liability for Catastrophe Claims [Table]
Business Combination [Table Text Block]
Disposal Groups, Including Discontinued Operations [Table Text Block]
alce_OtherPayablesCurrent
Other Payables, Current
Represents the amount of other current payables.
alce_TaxesRecoverable
Taxes recoverable
Represents the amount of taxes recoverable.
us-gaap_StockholdersEquity
Shareholders’ Equity / (Deficit) attributable to Alternus Clean Energy Inc.
Loss on issuance of debt
Gain (Loss) On Issuance of Debt
Loss on issuance of debt
Represents the amount of gain (loss) on the issuance of debt during the period.
Revenue
Revenue from Contract with Customer, Including Assessed Tax
Revenues
Change in valuation allowance