Document And Entity Information
Statistical Measurement [Axis]
Note To Financial Statement Details Textual
Declaration date
Dividends Payable, Date Declared
Note 2 - Cash, Cash Equivalents, and Restricted Cash
Note 3 - Inventories
Provision for (benefit from) income taxes
us-gaap_IncomeTaxExpenseBenefit
Provision for income taxes
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Note 4 - Revenue Recognition
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Note 5 - Acquisition and Discontinued Operations
Trading Arrangements, by Individual [Table]
Note 6 - Fair Value Measurements
Material Terms of Trading Arrangement [Text Block]
Note 7 - Derivative Instruments
Alternative investments
us-gaap_RestrictedInvestmentsNoncurrent
Note 8 - Other Current Assets and Other Assets
us-gaap_PaymentsToAcquireRealEstateHeldForInvestment
Payment for Acquisition, Real Estate, Held-for-Investment
Financial Instrument [Axis]
Note 9 - Investments
Note 10 - Goodwill and Other Intangible Assets
Net income (loss) attributable to Genie Energy Ltd. common stockholders
Note 11 - Accrued Expenses and Other Current Liabilities
Minimum [Member]
Note 12 - Leases
Product and Service, Other [Member]
Note 13 - Equity
Statistical Measurement [Domain]
Note 15 - Income Taxes
Maximum [Member]
Note 16 - Earnings Per Share
Note 17 - Related Party Transactions
Share Repurchase Program [Axis]
Note 18 - Business Segment Information
Share Repurchase Program [Domain]
Litigation Case [Domain]
Note 19 - Commitments and Contingencies
Note 20 - Debt
us-gaap_IncreaseDecreaseInAccountsReceivable
Trade accounts receivable
Note 2 - Cash, Cash Equivalents, and Restricted Cash - Schedule of Cash, Cash Equivalents, and Restricted Cash (Details)
Note 3 - Inventories - Schedule of Inventories (Details)
Note 4 - Revenue Recognition - Schedule of Disaggregated Revenues (Details)
Note 4 - Revenue Recognition - Schedule of Contract Liabilities (Details)
Note 4 - Revenue Recognition - Schedule of Credit Loss (Details)
Note 5 - Acquisition and Discontinued Operations - Schedule of Acquisitions (Details)
Note 5 - Discontinued Operations - Schedule of Discontinued Operations (Details)
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
Note 6 - Fair Value Measurements - Schedule of Assets and Liabilities (Details)
Note 6 - Fair Value Measurements - Schedule of Assets and Liabilities (Details) (Parentheticals)
Note 6 - Fair Value Measurements - Schedule of Concentration Risks (Details)
Note 7 - Derivative Instruments - Schedule Outstanding Volumes (Details)
Note 7 - Derivative Instruments - Schedule of Derivative Instruments (Details)
Note 7 - Derivative Instruments - Schedule of Derivative Instruments 2 (Details)
Note 8 - Other Current Assets and Other Assets - Schedule of Other Assets (Details)
Note 9 - Investments - Schedule of Investments (Details)
Note 9 - Investments - Schedule of Equity Securities without Readily Determinable Fair Value (Details)
Note 10 - Goodwill and Other Intangible Assets - Schedule of Goodwill (Details)
Counterparty Name [Axis]
Note 10 - Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Details)
Note 11 - Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses (Details)
Reported tax rate
Note 11 - Accrued Expenses and Other Current Liabilities - Schedule of Other Current Liabilities (Details)
Note 12 - Leases - Schedule of Operating Lease Assets and Liabilities (Details)
Note 12 - Leases - Schedule of Supplemental Cash Flow Information (Details)
Note 12 - Leases - Schedule of Maturity (Details)
Note 13 - Equity - Schedule of Dividends (Details)
Note 15 - Income Taxes - Reconciliation of Income Tax (Details)
Note 16 - Earnings Per Share - Schedule of Earnings Per Share (Details)
Note 17 - Related Party Transactions - Schedule of Income (Expense) (Details)
Note 17 - Related Party Transactions - Schedule of Receivables and Payables (Details)
Note 18 - Business Segment Information - Schedule of Operating Results (Details)
Employee-related expenses
us-gaap_LaborAndRelatedExpense
Note 18 - Business Segment Information - Schedule of Total Assets Reconciliation (Details)
Note 19 - Commitments and Contingencies - Schedule of Purchase Commitments (Details)
us-gaap_DividendsCommonStockCash
Dividends on common stock ($0.075 per share)
Note 20 - Debt - Schedule of Debt (Details)
Aggregate dividend amount
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Income taxes payable
us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Financial Instruments [Domain]
Dividends on common stock declared (in dollars per share)
Common Stock, Dividends, Per Share, Declared (in dollars per share)
Asset Pledged as Collateral [Member]
Litigation Case [Axis]
Lease Agreements [Member]
us-gaap_IncreaseDecreaseInInventories
Inventory
Counterparty Name [Domain]
us-gaap_SharesOutstanding
BALANCE (in shares)
BALANCE (in shares)
Gain recognized during the period
Letter of Credit [Member]
Dividends [Axis]
Dividends [Domain]
Segment Reporting [Text Block]
Trade accounts payable, accrued expenses and other liabilities
Segment Reporting [Table Text Block]
Current liabilities of discontinued operations
Current liabilities of discontinued operations
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:
Preferred stock, $0.01 par value; authorized shares—10,000: Series 2012-A, designated shares—8,750; at liquidation preference, consisting of 0 shares issued and outstanding at June 30, 2025 and December 31, 2024
us-gaap_Liabilities
Total liabilities
Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block]
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]
Consolidation Items [Axis]
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and equity
Stock-based compensation
us-gaap_AllocatedShareBasedCompensationExpense
Cash and Cash Equivalent [Table]
Pledged Status [Domain]
Segment Reporting [Table]
us-gaap_IncreaseDecreaseInPrepaidExpense
Prepaid expenses
Pledged Status [Axis]
Selling, general and administrative
us-gaap_ShareBasedCompensation
Stock-based compensation
Subsequent Event [Member]
Consolidation Items [Domain]
Liabilities and equity
Lessee, Lease, Description [Table]
Location, Statement of Income, Balance [Axis]
Changes in assets and liabilities:
Preferred stock, issued (in shares)
Preferred stock, outstanding (in shares)
Weighted average amortization period (Year)
Preferred stock, authorized (in shares)
Variable Interest Entity Disclosure [Text Block]
Preferred stock, par value (in dollars per share)
Energy Related Derivative [Member]
Restricted cash
Restricted Cash, Current
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net (decrease) increase in cash, cash equivalents, and restricted cash
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
Total cash, cash equivalents, and restricted cash
Cash, cash equivalents, and restricted cash (excluding cash held at discontinued operations) at end of period
Due to IDT Corporation, net
us-gaap_IncreaseDecreaseInDueToRelatedParties
Effect of exchange rate changes on cash, cash equivalents, and restricted cash
Amount IDT charged the Company
us-gaap_OtherExpenses
Class B Common Stock Repurchases [Member]
Represents repurchases of Class B common stock.
Less: Cash of discontinued operations at end of period
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash, cash equivalents, and restricted cash (including cash held at discontinued operations) at beginning of period
Cash, cash equivalents and restricted cash (including cash held at discontinued operations) at end of the period
us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation
Dilution of noncontrolling interest in a subsidiary
Statement [Table]
Credit Facility [Axis]
Operating cash flows from operating activities
Credit Facility [Domain]
us-gaap_LineOfCreditFacilityCommitmentFeeAmount
Line of Credit Facility, Commitment Fee Amount
Mergers, Acquisitions and Dispositions Disclosures [Text Block]
Prepaid expenses
Sales Channel, Directly to Consumer [Member]
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
Equity method investments
Operating leases
Marketable equity securities
us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
Acquisition of subsidiary
Line of Credit Facility, Lender [Domain]
Derivative contracts, liabilities
Lender Name [Axis]
Thereafter
gne_PurchaseObligationToBePaidAfterYearTwo
Amount of purchase arrangement to be paid after second fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
srt_StockRepurchaseProgramAuthorizedAmount1
Share Repurchase Program, Authorized, Amount
Surety Bond [Member]
Class B Common Stock Repurchases from Employees [Member]
Class B Common Stock Repurchases from Employees
gne_UnrecordedUnconditionalPurchaseObligationTotalPurchases
Unrecorded Unconditional Purchase Obligation, Total Purchases
The total amount purchased during the period under an unrecorded unconditional purchase obligation (for example, under the take-or-pay or throughput contract).
Amount the Company charged IDT
us-gaap_OtherIncome
Product and Service [Domain]
Product and Service [Axis]
Ownership [Axis]
Ownership [Domain]
Consolidated Entities [Axis]
Consolidated Entities [Domain]
Remainder of 2026
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total future lease payments
Deposits [Member]
us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Operating Lease, Weighted Average Discount Rate, Percent
2027
Due to IDT
us-gaap_AccountsPayableCurrentAndNoncurrent
Accounts Payable
us-gaap_OperatingLeaseExpense
Operating Lease, Expense
Schedule of Maturities of Long-Term Debt [Table Text Block]
Remainder of 2026
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
2029
Assets
Measurement Frequency [Axis]
Commitments and Contingencies Disclosure [Text Block]
2028
Statement [Line Items]
us-gaap_AccountsPayableTradeCurrentAndNoncurrent
Accounts Payable, Trade
2030
Fair Value Hierarchy and NAV [Axis]
Common stock, issued (in shares)
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Common stock, outstanding (in shares)
Common stock, authorized (in shares)
Common Class B [Member]
Fair Value, Concentration of Risk [Table]
Schedule of Accrued Liabilities [Table Text Block]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Common stock
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two
Guarantee Obligations [Member]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One
Schedule of Inventory, Current [Table Text Block]
us-gaap_InterestPayableCurrentAndNoncurrent
Interest Payable
Schedule of Cash and Cash Equivalents [Table Text Block]
Trade accounts payable
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four
us-gaap_TableTextBlock
Notes Tables
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Five
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive income attributable to Genie Energy Ltd.
Disposal Group Classification [Axis]
Disposal Group Classification [Domain]
us-gaap_ShortTermInvestments
Equity investments included in other current assets
Proceeds from return of investments
Concentration Risk Type [Axis]
Accrued expenses
us-gaap_AccruedLiabilitiesCurrent
Total accrued expenses
Payroll and employee benefits
Less imputed interest
Noncurrent portion of operating lease liabilities
Schedule of Related Party Transactions [Table Text Block]
Total operating lease liabilities
Total
Other accrued expenses
Current lease liabilities
Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain]
Accounts Receivable [Member]
Assets held for sale
us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent
Asset, Held-for-Sale, Not Part of Disposal Group, Current
Less: Current portion
Current debt, net
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Concentration Risk Type [Domain]
Roded Recycling Industries Ltd. [Member]
Represents Roded Recycling Industries Ltd.
Capitalization, Equity [Table]
2028
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Noncurrent portion of term loan
Noncurrent debt, net
2030
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
2029
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
2027
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
2032
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
Proceeds from sale of investment property, net
Proceeds from Sale of Property, Plant, and Equipment
us-gaap_LongTermInvestments
Equity investments included in other noncurrent assets
us-gaap_LongTermDebt
Long-Term Debt
Total term loan
Financial Standby Letter of Credit [Member]
Offsetting Assets [Table]
Statement of Stockholders' Equity [Abstract]
Intangible Asset, Finite-Lived, Class [Axis]
Loss Contingency Nature [Axis]
Investments in equity securities—noncurrent
us-gaap_EquitySecuritiesFVNINoncurrent
Statement of Comprehensive Income [Abstract]
Investments in equity securities—current
us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent
Intangible Asset, Finite-Lived, Class [Domain]
Statement of Cash Flows [Abstract]
Product Concentration Risk [Member]
us-gaap_LossContingencyEstimateOfPossibleLoss
Loss Contingency, Estimate of Possible Loss
Equity Components [Axis]
Equity Component [Domain]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Net assets
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 3 [Member]
Equity [Text Block]
AOCI Attributable to Parent [Member]
Fair Value, Inputs, Level 1 [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Loss Contingency, Nature [Domain]
ILLINOIS
Inventory valuation allowance
Inventory Write-down
Property and equipment, net
Subsequent Event Type [Domain]
NEW JERSEY
Provision for credit losses
Provision for credit losses
Subsequent Event Type [Axis]
Supplier Finance Program [Domain]
Deferred income tax assets, net
Cost of revenues
Cost of revenues
Cost of Revenue
Supplier Finance Program [Axis]
Stock-based compensation
Intangible Asset and Goodwill [Text Block]
Additions during the period, net of revenue recognized during the period
Fair Value Disclosures [Text Block]
us-gaap_GainLossOnDispositionOfAssets
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property
Gain from sale of investment property
Sales Channel, Through Intermediary [Member]
Due from IDT
us-gaap_AccountsReceivableNet
Accounts Receivable, after Allowance for Credit Loss
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
us-gaap_LiabilitiesCurrent
Total current liabilities
Derivatives Not Designated as Hedging Instruments [Table Text Block]
Series 2012-A Preferred Stock [Member]
Represents Series 2012-A Preferred Stock.
Preferred stock, designated (in shares)
Number of shares designated.
us-gaap_LettersOfCreditOutstandingAmount
Letters of Credit Outstanding, Amount
Receivable from issuance of equity
Represents from noncontrolling from the issuance of equity interests to noncontrolling interest holders.
Trade accounts receivable, net of allowance for credit losses of $8,972 and $7,876 at June 30, 2026 and December 31, 2025, respectively
Customer Concentration Risk [Member]
Marketable equity securities
Various publicly-held companies
Renewable Energy Program [Member]
Sales Channel, Other [Member]
Other sales channel for delivery of good or service in contract with customer.
Other Basis of Pricing Contract [Member]
Basis of pricing for contract with customer.
Derivative Instruments and Hedging Activities Disclosures [Table]
Customer Relationships [Member]
Revenue Benchmark [Member]
Measurement Input, Net Asset Value [Member]
Measurement input using net asset value.
Lumo Sweden [Member]
Information by name of disposal group.
Other Commitments [Table]
Net cash (used in) provided by operating activities of discontinued operations
Stock Repurchase Program [Member]
Represents the stock repurchase program.
Accumulated other comprehensive income
us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates
Payments to Acquire Interest in Subsidiaries and Affiliates
us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Accumulated amortization
C&I Solar Projects [Member]
C&I Solar Projects
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income before income taxes
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]
Recovery of Payments [Member]
Relates to the recovery of payments.
Claim Against Derivative Instrument Gain [Member]
Relates to the claim against a gain from sale of derivative instruments.
us-gaap_PaymentsToAcquireMarketableSecurities
Purchases of marketable equity securities and other investments, net of cash acquired
Additional paid-in capital
us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
Debt Disclosure [Text Block]
Investment property
gne_RealEstateInvestmentPropertyNetCurrent
Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.
us-gaap_MinorityInterest
Total noncontrolling interests
Discontinued Operations, Disposed of by Sale [Member]
Other Assets Disclosure [Text Block]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
gne_BusinessCombinationRecognizedAssetNetOfCurrentLiabilities
Cash
Amount of assets net of current liabilities.
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Capital expenditures
Lessee, Operating Leases [Text Block]
us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Subsidiary, Ownership Percentage, Noncontrolling Owner
us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Line of Credit Facility, Commitment Fee Percentage
us-gaap_MinorityInterestOwnershipPercentageByParent
Subsidiary, Ownership Percentage, Parent
us-gaap_DebtInstrumentCarryingAmount
Long-Term Debt, Gross
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
Cash Flow, Operating Activities, Lessee [Table Text Block]
Tabular disclosure of cash flow activities.
us-gaap_DebtWeightedAverageInterestRate
Debt, Weighted Average Interest Rate
Lessee, Operating Lease [Table Text Block]
Tabular disclosure for lessee's operating leases.
us-gaap_AssetsCurrent
Total current assets
Restricted Class B common stock issued to a member of the Board of Directors
Stock-based compensation (in shares)
Fair Value, Recurring and Nonrecurring [Table]
Gross profit
us-gaap_GrossProfit
Gross profit
O 2026 Q1 Dividends [Member]
O 2026 Q1 Dividends
Goodwill [Table]
us-gaap_DebtInstrumentFeeAmount
Debt Instrument, Fee Amount
Note to Acquire Investment Property [Member]
Information pertaining to the debt.
Debt Instrument, Name [Domain]
Noncontrolling Interest, Receivables from Issuance of Equity [Member]
Category of equity that is due.
Noncontrolling Interest Before Receivable For Issuance Of Capital Stock [Member]
This element represents that portion of equity (net assets) in a subsidiary not attributable, directly or indirectly, to the parent. A noncontrolling interest is sometimes called a minority interest.
Noncontrolling interests
Represents noncontrolling interest before the receivable.
us-gaap_GainLossOnSaleOfDerivatives
Gain (Loss) on Sale of Derivatives
us-gaap_DebtInstrumentInterestRateStatedPercentage
Debt Instrument, Interest Rate, Stated Percentage
Investment Property [Member]
Relates to investment ownership.
us-gaap_DebtInstrumentInterestRateEffectivePercentage
Debt Instrument, Interest Rate, Effective Percentage
Class of Stock [Domain]
Related and Nonrelated Parties [Axis]
gne_PaymentToImproveInvestmentProperty
Improvements in investment property
Amount of cash outflow for the purchase of or improvements of investment property.
us-gaap_NetCashProvidedByUsedInDiscontinuedOperations
Cash Provided by (Used in) Discontinued Operation
Schedule of Long-Term Debt Instruments [Table]
Derivative Liability, Statement of Financial Position, Extensible Enumeration, Not Disclosed [Flag]
Debt Instrument [Axis]
us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Net cash (used in) provided by operating activities of continuing operations
Operating activities
Remainder of 2026
us-gaap_PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear
Investing activities
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash (used in) provided by operating activities
Financing activities
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
us-gaap_TreasuryStockAcquiredAverageCostPerShare
Shares Acquired, Average Cost Per Share (in dollars per share)
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash used in financing activities
Accounts Receivable, Allowance for Credit Loss [Table Text Block]
Repayment of debt
gne_NetIncomeLossAvailableToCommonStockholders
Net income attributable to Genie Energy Ltd. common stockholders
The net income (loss) available to common stockholders.
us-gaap_RealEstateInvestmentPropertyAtCost
Real Estate Investment Property, at Cost
Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis]
Operating Segments [Member]
Accounting Policies [Abstract]
Segments [Domain]
gne_OwnershipPercentagePurchased
Ownership, Percentage Purchased
The percentage of ownership purchased.
Accounting Standards Update and Change in Accounting Principle [Text Block]
allowance for doubtful accounts
Allowance for credit losses, beginning
Allowance for credit losses, end
Long-Term Purchase Commitment [Table]
Segments [Axis]
Long-Term Purchase Commitment [Table Text Block]
us-gaap_StockRepurchasedDuringPeriodValue
Stock Repurchased During Period, Value
Continuing operations (in dollars per share)
us-gaap_StockRepurchasedDuringPeriodShares
Stock Repurchased During Period, Shares (in shares)
us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Continuing operations (in dollars per share)
Employees [Member]
Pertains to the counterparty.
Measurement Input Type [Axis]
Distribution
Relates to payments or distribution of equity securities
Income Statement [Abstract]
Purchase
Amount of cash outflow to acquire investment in equity security measured at fair value.
Other Capital Expenditures [Member]
Relates to capital expenditures.
2027
us-gaap_PurchaseObligationDueInNextTwelveMonths
Measurement Input, Cost to Sell [Member]
Discontinued operations (in dollars per share)
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Other assets
us-gaap_OtherAssetsMiscellaneousNoncurrent
us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Discontinued operations (in dollars per share)
Net loss from discontinued operations, net of tax
us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Other assets
us-gaap_OtherAssetsMiscellaneousCurrent
O 2026 Q2 Dividends [Member]
2026 Q2 Dividends
us-gaap_PurchaseObligation
Total payments
us-gaap_TreasuryStockCommonValue
Treasury stock, at cost, consisting of 4,577 and 4,492 shares of Class B common stock at June 30, 2026 and December 31, 2025
us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Share Repurchase Program, Remaining Authorized, Number of Shares (in shares)
Treasury stock, shares (in shares)
Treasury Stock, Common, Shares (in shares)
Treasury Stock, Common [Member]
2028
us-gaap_PurchaseObligationDueInSecondYear
us-gaap_NetIncomeLoss
Net income attributable to Genie Energy Ltd. common stockholders
Record date
Dividends Payable, Date of Record
us-gaap_AmortizationOfIntangibleAssets
Intangible Asset, Finite-Lived, Amortization Expense
Common Class A [Member]
Measurement Input Type [Domain]
Unused lines of Credit [Member]
Cumulative translation adjustment
us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage
Business Combination, Achieved in Stages, Preacquisition and Acquired Equity Interests in Acquiree, Percentage
Renewable energy
Income Tax Disclosure [Text Block]
Accounting Standards Update and Change in Accounting Principle [Table]
us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Unrecorded Unconditional Purchase Obligation
Impairment of assets
Impairment of assets
us-gaap_RelatedPartyTransactionAmountsOfTransaction
Related Party Transaction, Amounts of Transaction
Related and Nonrelated Parties [Domain]
Inventory [Domain]
Inventory [Axis]
us-gaap_TreasuryStockValueAcquiredCostMethod
Treasury Stock, Value, Acquired, Cost Method
Repurchase of Class B common stock
Related Party Transaction [Table]
Genie Retail Energy (“GRE”) [Member]
Relates to Genie Retail Energy (“GRE”).
Related Party Transactions Disclosure [Text Block]
Public Utilities, Inventory, Natural Gas [Member]
CityCom Solar [Member]
Represents CityCom Solar.
Diversegy [Member]
Represents Diversegy.
Genie Solar [Member]
Represents Genie Solar.
Fair Value Hierarchy and NAV [Domain]
Accounts payable and other current liabilities
us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsPayableAndAccruedLiabilitiesCurrent
Measurement Frequency [Domain]
us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation
Disposal Group, Including Discontinued Operation, Assets
Statement of Financial Position [Abstract]
Payment date
Dividends Payable, Date to be Paid
Current assets of discontinued operations
Current assets of discontinued operations
us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Write-offs and other deductions
Customer A [Member]
Information pertaining to customer A.
us-gaap_VariableInterestEntityOwnershipPercentage
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage
Marketing and customer acquisition expenses
us-gaap_MarketingAndAdvertisingExpense
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Table]
Fair Value, Recurring [Member]
Other assets
us-gaap_OtherAssetsNoncurrent
Total other assets
us-gaap_PaymentsForRepurchaseOfCommonStock
Repurchases of Class B common stock
us-gaap_IncreaseDecreaseInOtherOperatingAssets
Other current assets and other assets
Document Type
Operating expenses:
Document Information [Line Items]
Document Quarterly Report
Concentration risk, percentage
us-gaap_ConcentrationRiskPercentage1
Concentration Risk, Percentage
Genie Renewables (GREW) [Member]
Represents Genie Renewables.
us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Operating Lease, Weighted Average Remaining Lease Term (Year)
Document Information [Table]
us-gaap_BusinessAcquisitionsProFormaRevenue
Business Combination, Pro Forma Information, Pro Forma Revenue
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
Diluted
Non-vested restricted Class B common stock (in shares)
Entity Interactive Data Current
Document Transition Report
Diluted (in shares)
Diluted weighted-average number of shares (in shares)
Basic:
Patents and Trademarks [Member]
Relates to patents and trademarks.
us-gaap_LossContingencyDamagesSoughtValue
Loss Contingency, Damages Sought, Value
Basic weighted-average number of shares (in shares)
Basic (in shares)
us-gaap_UnrealizedGainLossOnInvestments
Unrealized gain on marketable equity securities and investments and other, net
Derivative Instrument [Axis]
us-gaap_EarningsPerShareBasic
Earnings per share attributable to Genie Energy Ltd. common stockholders (in dollars per share)
Other Current Liabilities [Table Text Block]
Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table]
Effective Income Tax Rate Reconciliation [Table]
Security deposits
us-gaap_DepositsAssetsNoncurrent
Equity Securities without Readily Determinable Fair Value [Table Text Block]
Thereafter
Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth 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).
Other intangibles, net
Term Loan [Member]
Information relating to the type of debt instrument.
Lumo Energia Oyj ("Lumo Finland") and Lumo Energi AB ("Lumo Sweden") [Member]
Represents Lumo Energia Oyj ("Lumo Finland") and Lumo Energi AB ("Lumo Sweden").
gne_LossContingencyDamagesSoughtValuePerViolation
Loss Contingency, Damages Sought, Value Per Violation
The value (monetary amount) of the award the plaintiff seeks in the legal matter for each violation.
Acquisition of Able Minds
Intangible assets, net
Document Fiscal Period Focus
Pledging Purpose [Axis]
Customer [Domain]
Intangible assets, gross
Document Fiscal Year Focus
Pledging Purpose [Domain]
Depreciation and amortization
us-gaap_DepreciationAndAmortization
JPMorgan Chase Bank [Member]
Identification of the lender, which may be a single entity (for example, a bank, pension fund, venture capital firm) or a group of entities that participate in the line of credit, including a letter of credit facility.
Amendment Flag
Equity Securities without Readily Determinable Fair Value [Table]
Common Stock [Member]
us-gaap_DebtInstrumentCollateralAmount
Debt Instrument, Collateral Amount
Goodwill
Goodwill
Balance
Balance
Document Period End Date
Investment [Table Text Block]
Alternative investments
Long-Lived Asset, Class [Domain]
Legal Entity [Axis]
National Cooperative Bank ("NCB") [Member]
Represents National Cooperative Bank, N.A. ("NCB").
Business Combination [Domain]
Entity File Number
Entity Tax Identification Number
Time-and-Materials Contract [Member]
Business Combination [Axis]
Disaggregation of Revenue [Table Text Block]
Disaggregation of Revenue [Table]
Entity [Domain]
Entity Central Index Key
us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Business Combination, Voting Equity Interest Acquired, Percentage
Entity Registrant Name
us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount
Balance, beginning of period
Balance, end of period
Foreign currency translation adjustments
Entity Current Reporting Status
Business Combination [Table]
Entity Incorporation, State or Country Code
Current Fiscal Year End Date
Contract with Customer, Sales Channel [Domain]
Entity Filer Category
Contract with Customer, Basis of Pricing [Domain]
Entity Shell Company
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Liabilities
Contract with Customer, Sales Channel [Axis]
Entity Emerging Growth Company
Fixed-Price Contract [Member]
Other comprehensive income
Entity Small Business
Contract with Customer, Basis of Pricing [Axis]
Income (loss) from operations
us-gaap_OperatingIncomeLoss
Income from operations
Fair value of derivative contracts—noncurrent
us-gaap_DerivativeAssetsNoncurrent
Energy contracts and options
Derivative contracts, assets
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Fair value of derivative contracts—current
us-gaap_DerivativeAssetsCurrent
Energy contracts and options1
Option Indexed to Issuer's Equity, Liability [Table]
Energy contracts and options
us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
Total derivatives not designated or not qualifying as hedging instruments — Liabilities
us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
Total derivatives not designated or not qualifying as hedging instruments — Assets
Other current assets
us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Recognition of revenue included in the beginning of the year contract liability
Cash
us-gaap_DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents
us-gaap_LossContingencyLossInPeriod
Loss Contingency, Loss in Period
Revenues:
us-gaap_DerivativeLiabilitiesNoncurrent
Energy contracts and options
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred
Entity Address, State or Province
Entity Address, City or Town
Inventory, Current [Table]
us-gaap_DerivativeLiabilitiesCurrent
Energy contracts and options1
us-gaap_InterestExpenseNonoperating
Interest expense
Retained earnings
Entity Address, Address Line One
City Area Code
Able Minds [Member]
Related to Able Minds.
Local Phone Number
Revenue from Contract with Customer [Text Block]
Entity Address, Postal Zip Code
Equity Method Investment [Table]
Able Minds ABA LLC [Member]
Related to Able Minds ABA LLC.
Derivative [Table]
us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue
Noncontrolling interest
Preferred Stock [Member]
Cash and Cash Equivalents Disclosure [Text Block]
Title of 12(b) Security
Security Exchange Name
Loss from Alleged Violations [Member]
An existing condition, situation, or set of circumstances involving uncertainty as to possible loss to an enterprise that will ultimately be resolved when one or more future events occur or fail to occur. Resolution of the uncertainty may confirm the incurrence of a loss or impairment of an asset or the incurrence of a liability.
Trading Symbol
gne_SaleOfAssetsValue
Sale of Assets, Value
The value of assets sold.
Violations of Illinois Consumer Fraud and Deceptive Business Practices Act [Member]
Judicial proceeding, alternative dispute resolution or claim. For example, but not limited to, name of case, category of litigation, or other differentiating information.
gne_BusinessCombinationRecognizedAssetAcquiredAccountsReceivableAndOtherCurrentAssets
Accounts receivable and other current assets
Amount of accounts receivable and other current assets acquired in business combination and recognized at acquisition date.
us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeFairValue1
Business Combination, Achieved in Stages, Preacquisition Equity Interest in Acquiree, Fair Value
Class of Stock [Axis]
Due to IDT Corporation, net
Related Party Transaction [Domain]
Renewable Energy Credits [Member]
Represents Renewable Energy Credits.
Residents Energy [Member]
Relates to Residents Energy.
Entity Common Stock, Shares Outstanding
Related Party Transaction [Axis]
Earnings Per Share [Text Block]
BP Energy Company, Preferred Supplier Agreement [Member]
Specific identification or general nature of (for example, a construction contractor, a consulting firm) the party from whom the goods or services were or are to be received.
Schedule of Related Party Transactions, Balance Sheet Items [Table Text Block]
Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates.
Other current assets
Total other current assets
IDT Corporation [Member]
Relates to the related parties.
Other
us-gaap_OtherSundryLiabilitiesCurrent
Insurance [Member]
Transaction between related party.
IGM Brokerage Corp [Member]
Information pertaining to the related parties.
Guarantor Obligations, Nature [Domain]
Net income (loss) attributable to noncontrolling interests, net
Rafael Holdings, Inc [Member]
Pertains to the related parties.
Liability to customers related to promotions and retention incentives
Net income
Net income (loss)
Howard Jonas [Member]
Pertains to the related parties.
us-gaap_GuaranteeObligationsCurrentCarryingValue
Guarantor Obligations, Current Carrying Value
Scenario [Axis]
Guarantor Obligations, Nature [Axis]
Scenario [Domain]
Forecast [Member]
Measurement Input, Quoted Price [Member]
Income taxes payable
Weighted-average number of shares used in calculation of earnings per share:
Common stock, par value (in dollars per share)
Schedule of Other Assets, Noncurrent [Table Text Block]
Derivative Contract [Domain]
Continuing operations
us-gaap_NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic
Other income, net
Discontinued operations
Income (loss) from discontinued operations, net of taxes
gne_LossContingencyPlaintiffNumberOfYearsCustomer
Loss Contingency, Plaintiff, Number of Years Customer (Year)
The number of years the plaintiff was a customer.
Putative Class Action Complaint Against IDT Energy [Member]
Represents putative class action complaint against IDT Energy.
Current hedge liabilities
Long-Lived Asset, Class [Axis]
Total assets
us-gaap_Assets
Total assets
Cash and cash equivalents
Geographical [Domain]
Geographical [Axis]
Net income from continuing operations
us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
Net income from continuing operations
us-gaap_EarningsPerShareDiluted
Earnings per share attributable to Genie Energy Ltd. common stockholders (in dollars per share)
Investment [Text Block]
us-gaap_InvestmentOwnedBalanceShares
Investment Owned, Balance, Shares (in shares)
us-gaap_ContractWithCustomerLiability
Contract liability, beginning
Contract liability, end
Other selling, general and administrative expenses
us-gaap_OtherSellingGeneralAndAdministrativeExpense
Customer [Axis]
us-gaap_PaymentsToAcquireBusinessesGross
Payments to Acquire Businesses, Gross
Contract liabilities
Depreciation and amortization
Electricity, Generation [Member]
Electricity [Member]
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Accounts and Financing Receivables [Table]
us-gaap_InvestmentOwnedAtCost
Investment Owned, Cost
Volume (Megawatt-Hour)
Disposal Group Name [Domain]
Interest income
Inventory Disclosure [Text Block]
us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
Comprehensive loss attributable to noncontrolling interests
Oil and Gas [Member]
Intangible Asset, Finite-Lived [Table Text Block]
Other comprehensive loss:
us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Comprehensive income
Intangible Asset, Finite-Lived [Table]
Business Combination [Table Text Block]
us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Total equity
BALANCE
BALANCE
Disposal Groups, Including Discontinued Operations [Table]
Schedule of Dividends Payable [Table Text Block]
Disposal Groups, Including Discontinued Operations [Table Text Block]
Inventory
Inventory
Equity:
Disposal Group Name [Axis]
Financial Instrument Subject to Mandatory Redemption [Table]
us-gaap_StockholdersEquity
Total Genie Energy Ltd. stockholders’ equity
Goodwill [Table Text Block]
us-gaap_PaymentsOfDividends
Dividends paid
Concentration Risk Benchmark [Axis]
Nature of Operation, Product Information, Concentration of Risk [Table]
Concentration Risk Benchmark [Domain]
Right-of-use assets, net of amortization
ROU Assets
Other current liabilities
Total other current liabilities
Other liabilities
Revenues
Revenues
Revenue from Contract with Customer, Excluding Assessed Tax
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Commitments and contingencies (Note 19)