Document And Entity Information
Note To Financial Statement Details Textual
Commodity derivative gain, net
Significant Accounting Policies
Note 1 - Organization, Operations and Significant Accounting Policies
Tax at U.S. federal statutory rate (21%)
Note 2 - Acquisitions and Divestitures
Note 3 - Revenue From Contracts with Customers
Note 4 - Leases
Note 6 - Debt
Note 7 - Commodity Derivatives
Noncurrent liabilities:
Note 8 - Asset Retirement Obligations
Note 10 - Shareholders' Equity
Income Tax Disclosure [Text Block]
Note 11 - Income Taxes
Credit facility
Note 12 - Income (Loss) Per Share
Note 13 - Fair Value Measurements
Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities
Note 15 - Supplemental Disclosures of Cash Flow Information
us-gaap_LiabilitiesCurrent
Total current liabilities
Total current liabilities
Note 17 - Supplemental Oil and Natural Gas Information (Unaudited)
Schedule of Debt [Table Text Block]
Note 1 - Organization, Operations and Significant Accounting Policies - Concentration of Credit Risk (Details)
Note 1 - Organization, Operations and Significant Accounting Policies - Schedule of Property, Plant, and Equipment by Useful Life (Details)
Note 1 - Organization, Operations and Significant Accounting Policies - Schedule of Error Corrections and Prior Period Adjustments (Details)
us-gaap_AssetRetirementObligationCurrent
Asset retirement obligations
Note 2 - Acquisitions - Asset Acquisitions (Details)
Note 2 - Acquisitions - Asset Acquisitions (Details) (Parentheticals)
Note 3 - Revenue from Contracts with Customers - Disaggregation of Revenue (Details)
Schedule of Other Current Assets [Table Text Block]
Note 4 - Leases - Lease Cost (Details)
Note 4 - Leases - Schedule of Operating Lease Maturity (Details)
Synergy Offshore LLC [Member]
Information pertaining to the related parties.
Note 6 - Debt - Schedule of Debt (Details)
Note 7 - Commodity Derivatives - Schedule of Derivative Gains (Details)
Note 8 - Asset Retirement Obligation - Schedule of Asset Retirement Obligations (Details)
Note 10 - Shareholders' Equity - Restricted Stock Activity (Details)
Note 10 - Shareholders' Equity - Stock Compensation Expense (Details)
Note 10 - Shareholders' Equity - Activity in Share Repurchase Program (Details)
Note 11 - Income Taxes - Schedule of Components of Income Tax (Details)
Note 11 - Income Taxes - Effective Income Tax Reconciliation (Details)
Granted, weighted average grant date fair value (in dollars per share)
Note 11 - Income Taxes - Components of Deferred Tax Assets (Details)
Vested, weighted average grant date fair value (in dollars per share)
Note 11 - Income Taxes - Schedule of Income Taxes Paid (Details)
Forfeited, weighted average grant date fair value (in dollars per share)
Note 12 - Income (Loss) Per Share - Schedule of Loss Per Share (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Non-vested restricted stock, weighted average grant date fair value (in dollars per share)
Non-vested restricted stock, weighted average grant date fair value (in dollars per share)
Note 12 - Income (Loss) Per Share - Schedule of Antidilutive Securities (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited (in shares)
Note 13 - Fair Value Measurements - Schedule of Fair Value Assets Measured on Recurring Basis (Details)
Accrued compensation and benefits
Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities - Schedule of Other Current Assets (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Non-vested restricted stock (in shares)
Non-vested restricted stock (in shares)
Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities - Schedule of Other Current Assets (Details) (Parentheticals)
Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities - Schedule of Accounts Payable and Accrued Liabilities (Details)
Note 15 - Supplemental Disclosures of Cash Flow Information - Supplemental Disclosures of Cash Flow Information (Details)
Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) - Schedule of Capitalized Oil and Gas Costs Incurred (Details)
Granted (in shares)
Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) - Schedule of Capitalized Oil and Gas Costs (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested (in shares)
Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) - Results of Operations from Oil and Gas Producing Activities (Details)
Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) - Schedule of Proved Reserves (Details)
Sale of real estate and other, net
Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) - Schedule of Standardized Oil and Gas Measures (Details)
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) - Discounted Future Cash Flows From Oil and Gas Reserves (Details)
Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) - Schedule of Changes in Standardized Measure (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
useg_DeferredTaxAssetsTaxDeferredExpenseLeases
Lease obligations
Amount before allocation of valuation allowances of deferred tax asset attributable to leases
us-gaap_PaymentsToAcquireInvestments
Payments to Acquire Investments
Recognized Built In Losses [Member]
Relating to recognized built in losses
Commodity Contract [Member]
useg_DeferredTaxAssetsLiabilitiesGross
Net deferred tax assets
Represents the amount of deferred tax assets (liabilities) before valuation allowance.
The 2022 Stock Incentive Plan [Member]
Relating to the 2022 Stock Incentive Plan.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in dollars per share)
Accounts payable and accrued liabilities
Accounts payable and accrued liabilities
Total accounts payable and accrued expenses
Production taxes payable
Derivatives and Fair Value [Text Block]
Interest payable
Lessee, Operating Leases [Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)
us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Proceeds from Sale of Property, Plant, and Equipment
us-gaap_OtherAccruedLiabilitiesCurrent
Other
us-gaap_PolicyTextBlockAbstract
Accounting Policies
useg_DebtInstrumentUnusedBorrowingFeePercent
Debt Instrument, Unused Borrowing Fee, Percent
The percent related to the unused borrowing amount of the debt instrument.
Schedule of Asset Retirement Obligations [Table Text Block]
useg_EquityAgreementMaximumAmount
Equity Agreement, Maximum Amount
The maximum value for the equity agreement.
Amended Credit Agreement [Member]
Represents the amended credit agreement.
Cash
Payments to Acquire Productive Assets
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)
Common stock issued for acquisition of properties
useg_EquityAgreementStructuringFee
Equity Agreement, Structuring Fee
The structuring fee related to the equity agreement.
useg_EquityAgreementBeneficialownershipBlockerPercent
Equity Agreement, Beneficial-Ownership Blocker, Percent
Represents the percent of beneficial-ownership blocker for the equity agreement.
useg_EquityAgreementCashCommitmentFee
Equity Agreement, Cash Commitment Fee
The cash commitment fee for the equity agreement.
useg_EquityAgreementDiscountOnStockPricePercent
Equity Agreement, Discount on Stock Price, Percent
The percent of discount on the stock price for the equity agreement.
Common Stock Purchase Agreement [Member]
Represents the common stock purchase agreement.
useg_EquityAgreementOutstandingSharesPercent
Equity Agreement, Outstanding Shares, Percent
Represents the percent of outstanding shares allowed for the equity agreement.
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)
us-gaap_IncomeTaxesPaidNet
Total Cash Taxes Paid
Basic and diluted weighted average shares outstanding (in shares)
Accounts payable
useg_OilAndGasPropertiesDepletionAndAmortizationPerUnitOfProduction
Oil and Gas Properties, Depletion and Amortization per Unit of Production (in USD per Per Share)
Represents the amount of depletion and amortization per unit of production on oil and gas properties.
us-gaap_PaymentsToExploreAndDevelopOilAndGasProperties
Capital expenditures
Current liabilities:
useg_ResultsOfOperationsProductionTaxes
Production taxes
Production taxes from oil and gas producing activities.
useg_ResultsOfOperationsLeaseOperatingExpense
Lease operating expense
Lease operating expense from oil and gas producing activities.
Payments on operating lease liability
us-gaap_PaymentsToAcquireOilAndGasProperty
Acquisition of industrial gas properties
us-gaap_Assets
Total assets
Plan Name [Axis]
Plan Name [Domain]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Lease operating expenses
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
Net income (loss) attributable to common shareholders
Mergers, Acquisitions and Dispositions Disclosures [Text Block]
Synergy Purchase Agreement [Member]
Relates to the Synergy Purchase Agreement.
Income tax receivable
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Sage Road Capital, LLC [Member]
Information by name of issuer of investment.
Property [Member]
Pertains to the properties acquired.
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]
useg_PaymentsForRepurchaseOfCommonStockRelatedParty
Related party share repurchase
The cash outflow to reacquire common stock during the period.
useg_StockRepurchasedDuringPeriodValueRelatedParty
Shares repurchased from related party
Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury.
useg_StockRepurchasedDuringPeriodSharesRelatedParty
Shares repurchased from related party (in shares)
Number of shares that have been repurchased during the period and have not been retired and are not held in treasury.
Award Type [Domain]
Effective Income Tax Rate Reconciliation [Table]
Award Type [Axis]
Net loss
Net loss
Restricted Stock [Member]
Share-Based Payment Arrangement, Option [Member]
useg_EquityOfferingCommissionPercentageOfClosingSalesPrice
Equity Offering, Commission, Percentage of Closing Sales Price
Pertains to a percentage of closing sales price.
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Antidilutive Security, Excluded EPS Calculation [Table]
Antidilutive Securities [Axis]
Antidilutive Securities, Name [Domain]
Commitments and Contingencies Disclosure [Text Block]
Property and equipment, net
Business Combination [Table]
Other Current Assets, Accounts Payable, and Accrued Liabilities [Text Block]
The entire disclosure around other current assets, accounts payable, and accrued liabilities.
Derivative Instrument [Axis]
Derivative Contract [Domain]
Cash flows from investing activities:
Earnings Per Share [Text Block]
Accounts payable and accrued liabilities
us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Accrued compensation and benefits
us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities
us-gaap_IncomeTaxExpenseBenefit
Income tax (expense) benefit
Income tax expense (benefit)
us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments
(Gains) losses on marketable equity securities
useg_GainLossOnCommodityDerivative
Commodity derivative settlements received
Represents the amount of gain (loss) on commodity derivative.
Shares withheld to settle tax withholding obligations for restricted stock awards
Represents the monetary amount of shares withheld to settle tax withholding obligations for restricted stock.
Oil Sales[Member]
Relating to Oil Sales.
Income Tax Paid, Federal, after Refund Received
us-gaap_OperatingExpenses
Total operating expenses
Total operating expense
us-gaap_DebtInstrumentTerm
Debt Instrument, Term (Year)
Income Tax Paid, State and Local, after Refund Received
Production taxes
Production taxes
General and administrative expenses
Income Tax Paid, Foreign, after Refund Received
Cash and equivalents
us-gaap_AllocatedShareBasedCompensationExpense
Share-Based Payment Arrangement, Expense
Settlements of asset retirement obligations
Accretion
Amendment Flag
City Area Code
Use of Estimates, Policy [Policy Text Block]
us-gaap_PriorPeriodReclassificationAdjustment
Prior Period Reclassification Adjustment
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Common stock, outstanding (in shares)
us-gaap_IncreaseDecreaseInOtherOperatingAssets
Other assets
Weighted average interest rate
Mid-Continent [Member]
Relating to Mid-Continent.
Purchaser A [Member]
Relating to the Purchaser A.
Current Fiscal Year End Date
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
us-gaap_LeaseCost
Total lease costs
Rockies [Member]
Relating to the Rockies.
Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table]
West Texas, South Texas, and Gulf Coast [Member]
Relating to West Texas, South Texas, and Gulf Coast.
Weighted average discount rate
Document Fiscal Period Focus
Operating lease cost
Document Fiscal Year Focus
Consolidation, Policy [Policy Text Block]
Short-term lease cost
Lease, Cost [Table Text Block]
Purchaser B [Member]
Relating to Purchaser B.
Document Period End Date
Weighted average lease term (years) (Year)
Entity File Number
Entity Emerging Growth Company
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
Document Type
useg_OilAndGasPropertyCeilingTestDiscountRate
Oil and Gas Property, Ceiling Test, Discount Rate
Represents the discount rate used in a ceiling test for oil and gas property.
Entity Small Business
Entity Shell Company
Capitalization, Equity [Table]
Document Information [Line Items]
Document Information [Table]
Entity Public Float
Entity Filer Category
Debt Instrument [Axis]
Credit Agreement [Member]
Relating to the Credit Agreement.
Number of shares owned (in shares)
Entity Current Reporting Status
Debt Instrument, Name [Domain]
Entity Voluntary Filers
Share value
Entity Well-known Seasoned Issuer
Variable Rate [Domain]
Total derivative settlement gains (losses)
Represents the amount of gain (loss) on derivative settlements.
Fed Funds Effective Rate Overnight Index Swap Rate [Member]
Oil Contracts [Member]
Relating to oil contracts.
Award Timing MNPI Disclosure [Text Block]
Schedule of Long-Term Debt Instruments [Table]
Variable Rate [Axis]
useg_PolicyTable
Concentration risk, percentage
ecd_AwardTmgMnpiCnsdrdFlag
Award Timing MNPI Considered [Flag]
Impairment of oil and natural gas properties
Impairment, Oil and Gas, Property with Unproved and Proved Reserves
Entity Tax Identification Number
Entity Central Index Key
Insider Trading Policies and Procedures [Line Items]
Depreciation, depletion, accretion, and amortization
Entity Registrant Name
Stock-based compensation
ecd_InsiderTrdPoliciesProcAdoptedFlag
Insider Trading Policies and Procedures Adopted [Flag]
Entity [Domain]
Customer Concentration Risk [Member]
Legal Entity [Axis]
Entity Address, Address Line One
Offering costs
us-gaap_CapitalizedCostsAssetRetirementCosts
Oil and Gas, Capitalized Cost, before Accumulated Depreciation, Depletion, Amortization, and Valuation Allowance, Asset Retirement
useg_AssetRetirementObligationPlugged
Settlements
Represents the amount of asset retirement obligations plugged during the period.
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
us-gaap_CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities
Less accumulated depletion (2)
Entity Address, City or Town
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Entity Address, Postal Zip Code
Entity Address, State or Province
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Concentration Risk Type [Axis]
Material Terms of Trading Arrangement [Text Block]
us-gaap_AllowanceForDoubtfulAccountsReceivable
Accounts Receivable, Allowance for Credit Loss
useg_EquityAgreementCashProceedsFromResaleOfShares
Equity Agreement, Cash Proceeds from Resale of Shares
The cash proceeds from the resale of shares under the equity agreement.
Concentration Risk Type [Domain]
Shares repurchased (in shares)
Stock Repurchased During Period, Shares (in shares)
Shares repurchased (in shares)
Entity Common Stock, Shares Outstanding
Trading Arrangements, by Individual [Table]
Value of shares repurchased
Stock Repurchased During Period, Value
Share repurchases
Revenue Benchmark [Member]
Joint interest billings receivable, net of allowance of $380 and $100 as of December 31, 2025 and 2024, respectively
Represents the amount of joint interest billings receivable.
Quoted market price (in dollars per share)
Represents the quoted market price of an investment owned.
Trading Symbol
Operating expense accruals
Represents the amount of operating expense and oil and gas property accruals.
Concentration Risk Benchmark [Axis]
us-gaap_CapitalizedCostsOilAndGasProducingActivitiesNet
Net capitalized costs
Concentration Risk Benchmark [Domain]
Evaluated properties in full cost pool (1)
Stock Issued During Period, Shares, Acquisitions (in shares)
Asset retirement obligations (acquired, revisions, sold, and plugged wells)
Represents the amount of asset retirement obligation incurred.
Change in capital expenditure accruals
Represents the amount of change in capital expenditure accruals during the period.
Local Phone Number
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]
Stock Issued During Period, Value, Acquisitions
us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)
us-gaap_TableTextBlock
Notes Tables
us-gaap_GainLossOnDispositionOfAssets1
Loss on sale of assets
Loss on sale of assets
us-gaap_GainLossOnSaleOfOilAndGasProperty
Gain (Loss) on Disposition of Oil and Gas Property
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
Evaluated properties
Represents the amount of proved oil and gas properties measured using the full cost method.
Related and Nonrelated Parties [Axis]
Related and Nonrelated Parties [Domain]
Unproved industrial gas properties, not subject to amortization
Represents the amount of unproven oil and gas properties measured using the full cost method.
us-gaap_ProvisionForDoubtfulAccounts
Accounts Receivable, Credit Loss Expense (Reversal)
Oil and Gas, Capitalized Cost [Table Text Block]
Shares issued (in shares)
Asset Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)
Number of shares of equity interests issued or issuable to acquire assets.
us-gaap_IncreaseDecreaseInUnprovedOilAndGasProperty
Oil and natural gas sales receivable
Shares issued, net (in shares)
Stock Issued During Period, Shares, New Issues (in shares)
Shares issued to employees and directors
Shares issued to employees and directors (in shares)
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and shareholders’ equity
Shares issued, net
Related Party Transaction [Axis]
Related Party Transaction [Domain]
Accumulated deficit
Accumulated deficit, December 31, 2023
Exploration Expense
us-gaap_AssetRetirementObligationRevisionOfEstimate
Cost and life revisions
Federal Income Tax Note [Table]
Revenue and royalties payable
Amount of revenue and royalties payable, classified as current.
Debt Disclosure [Text Block]
Derivative Instruments, Gain (Loss) [Table Text Block]
Revenue and royalties payable
useg_IncreaseDecreaseInRevenueAndRoyaltiesPayable
Amount of increase (decrease) in revenue and royalties payable.
Acquired
us-gaap_AssetRetirementObligationLiabilitiesSettled
Asset Retirement Obligation, Liabilities Settled
Liabilities related to disposition
Asset Retirement Obligation Disclosure [Text Block]
Interest charges
Changes in operating assets and liabilities:
us-gaap_AssetRetirementObligationLegallyRestrictedAssetsFairValue
Asset Retirement Obligation, Legally Restricted Assets, Fair Value
Amortization of debt issuance costs
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Subsequent Event [Member]
Long-term lease obligation
Long-term lease obligation
Proceeds from sale of oil and natural gas properties, net
Proceeds from Sale of Oil and Gas Property and Equipment, Net
The amount of net cash proceeds from the sale of oil and gas property and equipment, net.
Deferred income taxes
Total lease liability
us-gaap_OperatingLeaseLiability
Operating Lease, Liability
Subsequent Event [Table]
Subsequent Event Type [Axis]
Current lease obligation
Current lease obligation
Subsequent Event Type [Domain]
Subsequent Events [Text Block]
Right of use asset
Operating lease
Wells and Overriding Royalty Interests in North Dakota, New Mexico, and Texas [Member]
Represents wells and overriding royalty interests in North Dakota, New Mexico, and Texas.
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total future lease payments
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less: imputed interest
us-gaap_DeferredIncomeTaxExpenseBenefit
Total deferred income taxes
2027
Oil and Gas Properties Policy [Policy Text Block]
useg_DisposalGroupTransactionCosts
Disposal Group, Transaction Costs
Amount of transaction costs of disposal group.
useg_DebtInstrumentCovenantRestrictedPaymentPercentageOfExistingBorrowingBase
Debt Instrument, Covenant, Restricted Payment, Percentage of Existing Borrowing Base
Percentage of existing borrowing base for restricted payment under covenant of the debt instrument.
2026
Segment Reporting, Policy [Policy Text Block]
useg_DebtInstrumentCovenantRatioOfConsolidatedCurrentAssetsToConsolidatedCurrentLiabilities
Debt Instrument, Covenant, Ratio of Consolidated Current Assets to Consolidated Current Liabilities
The ratio of consolidated current assets to consolidated current liabilities required by the debt instrument.
useg_DebtInstrumentCovenantRatioOfTotalDebtToEbitdax
Debt Instrument, Covenant, Ratio of Total Debt to EBITDAX
The ratio of total debt to EBITDAX required under the debt instrument.
Adjustment for Production Tax [Member]
Related to adjustment.
Reclassification From Acquisition Costs to Exploration Expense [Member]
Related to reclassification.
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Other assets
Stock-based compensation
us-gaap_ShareBasedCompensation
Lessee, Leases [Policy Text Block]
Business Combination [Policy Text Block]
Earnings Per Share, Policy [Policy Text Block]
Approximation [Member]
Related to approximation.
Adjustment for Commitment Fee [Member]
Related to adjustment.
Operating expenses:
Discontinued Operations, Policy [Policy Text Block]
Income Tax, Policy [Policy Text Block]
us-gaap_LesseeOperatingLeaseTermOfContract
Lessee, Operating Lease, Term of Contract (Year)
Depreciation, depletion, accretion, and amortization
us-gaap_DepreciationDepletionAndAmortization
Depreciation, Depletion and Amortization
us-gaap_OilAndGasPropertyFullCostMethodNet
Net oil and natural gas properties
Shares withheld to settle tax withholding obligations for restricted stock awards (in shares)
Shares withheld to settle tax withholding obligations for restricted stock awards (in shares)
us-gaap_SharesIssuedPricePerShare
Shares Issued, Price Per Share (in dollars per share)
us-gaap_AssetsCurrent
Total current assets
Oil and natural gas properties under full cost method:
us-gaap_UnrealizedGainLossOnDerivatives
Total commodity derivatives gains, net
Share-Based Payment Arrangement [Policy Text Block]
Equity [Text Block]
useg_ResultsOfOperationsGatheringTreatingAndTransportationCosts
Gathering, treating, and transportation costs
Gathering, treating and transportation costs related to oil and gas producing activities.
us-gaap_GainLossOnSaleOfCommodityContracts
Gain (Loss) on Sale of Commodity Contracts
Fair Value Measurement Inputs and Valuation Techniques [Table]
Common stock, $0.01 par value; 245,000,000 authorized; 34,405,143 and 27,903,197 shares issued and outstanding as of December 31, 2025 and 2024, respectively
Fair Value
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Common stock, authorized (in shares)
Common Stock, Shares Authorized (in shares)
Common stock, issued (in shares)
Common stock, par value (in dollars per share)
Revenue from Contract with Customer [Policy Text Block]
Revision of Prior Period [Axis]
Deferred offering costs
Revision of Prior Period [Domain]
us-gaap_DerivativeAssetsCurrent
Derivative Asset, Current
Previously Reported [Member]
us-gaap_DeferredTaxAssetsValuationAllowance
Less valuation allowance
Statistical Measurement [Domain]
Maximum [Member]
Minimum [Member]
Ownership [Domain]
Other current assets
Total other current assets
Product and Service [Axis]
Asset Retirement Obligation [Policy Text Block]
Product and Service [Domain]
Statistical Measurement [Axis]
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Ownership [Axis]
us-gaap_DeferredTaxAssetsLiabilitiesNet
Net deferred tax liability
Cash paid for interest
Cash Flow, Supplemental Disclosures [Text Block]
Prepaid expense
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
us-gaap_DeferredTaxAssetsOther
Other
Geographical [Axis]
us-gaap_DeferredTaxAssetsGross
Total deferred tax assets
Geographical [Domain]
us-gaap_PreferredStockSharesAuthorized
Preferred Stock, Shares Authorized (in shares)
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
Schedule of Operating Leased Assets [Table]
Customer [Axis]
Customer [Domain]
us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment
Property and equipment
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations
Asset retirement obligations
Interest expense, net
Interest expense, net
Useful life (Year)
Cash flows from operating activities:
Statement [Line Items]
us-gaap_NumberOfOperatingSegments
Number of Operating Segments
Oil and natural gas sales receivables
Furniture and Fixtures [Member]
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Stock-based compensation
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation
Deferred compensation liability
Property, Plant and Equipment, Other Types [Member]
Revenue:
Marketable equity securities
Additional paid-in capital
Shareholders’ equity:
us-gaap_DeferredTaxAssetsCharitableContributionCarryforwards
Percentage depletion and contribution carryovers
Property, Plant and Equipment, Policy [Policy Text Block]
Board of Directors Chairman [Member]
Other income (expense), net
Long-Lived Tangible Asset [Axis]
us-gaap_NonoperatingIncomeExpense
Total other income (expense)
Total other income (expense)
Long-Lived Tangible Asset [Domain]
srt_AverageSalesPrices
Oil and Gas, Average Sale Price Per Unit (in USD per Per Share)
us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Net operating loss carryover
Current assets:
Fair Value Disclosures [Text Block]
Crude Oil [Member]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash and equivalents, beginning of year
Cash and equivalents, end of year
Private Placement [Member]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net (decrease) increase in cash and equivalents
Over-Allotment Option [Member]
Energy [Axis]
Other assets:
us-gaap_Liabilities
Total liabilities
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash provided by (used in) financing activities
Commitments and contingencies (Note 9)
Sale of Stock [Axis]
us-gaap_OtherAssetsMiscellaneousCurrent
Other
Sale of Stock [Domain]
Asset retirement obligations
us-gaap_AssetRetirementObligationsNoncurrent
Asset retirement obligations - noncurrent
us-gaap_OperatingIncomeLoss
Operating loss
Other income (expense):
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash (used in) provided by operating activities
Energy [Domain]
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash (used in) provided by investing activities:
Investment, Issuer Name [Domain]
Investment, Issuer Name [Axis]
Oil and Gas, Acreage [Table]
Derivatives, Policy [Policy Text Block]
srt_GasAndOilAreaUndevelopedNet
Oil and Gas, Undeveloped Acreage, Net (Acre)
us-gaap_DeferredTaxLiabilitiesLeasingArrangements
Lease assets
useg_PurchaseAndSaleAgreementPercentageOfRightsAcquired
Purchase and Sale Agreement, Percentage of Rights Acquired
Represents the percentage of rights acquired in a purchase and sale agreement.
Kevin Dome Structure [Member]
Represents the Kevin Dome structure property acquired.
Helium Acreage [Member]
Represents the helium acreage acquired.
Marketable Securities, Policy [Policy Text Block]
Natural Gas and Natural Gas Liquids (NGL) [Member]
us-gaap_PaymentOfFinancingAndStockIssuanceCosts
Debt and equity financing costs
Condensed Cash Flow Statement [Table]
Concentration Risk, Credit Risk, Policy [Policy Text Block]
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Shares withheld to settle tax withholding obligations for restricted stock awards
Error Correction [Policy Text Block]
Disclosure of accounting policy for error corrections.
useg_AssetAcquisitionTransactionCosts
Asset Acquisition, Transaction Costs
Represents the amount of transaction costs of an asset acquisition.
useg_NumberOfWells
Number of Wells
Represents the number of wells on a property.
Oil and Gas, Average Sale Price and Production Cost [Table Text Block]
us-gaap_OilAndGasPropertyFullCostMethodDepletion
Less accumulated depreciation, depletion and amortization
srt_FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows
Future net cash flows
srt_DecreaseDueToSalesOfMineralsInPlace
Sale of minerals in place
Synergy Offshore Acreage [Member]
Represents information pertaining to Synergy offshore acreage.
Future cash inflows
us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Proceeds from Issuance or Sale of Equity
srt_FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts
Development costs
Schedule of Income Taxes Paid [Table Text Block]
The entire tabular disclosure of income taxes paid.
srt_FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts
Production costs
us-gaap_PaymentsForRepurchaseOfCommonStock
Repurchases of common stock
srt_FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense
Income taxes
Changes in timing and other
Scenario [Domain]
Forecast [Member]
srt_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves
Standardized measure of discounted future net cash flows
Standardized measure, beginning of year
Standardized measure, end of year
useg_AssetAcqusitionAmountOfCapitalCostsIncurredRelatedToSellingParty
Asset Acqusition, Amount of Capital Costs Incurred Related to Selling Party
Represents the amount of capital costs that the selling party is responsible for in an asset acquisition.
Previously estimated development costs incurred
useg_AssetAcquisitionPercentageOfCapitalCostsResponsibleFor
Asset Acquisition, Percentage of Capital Costs Responsible for
Represents the percentage of capital costs that the purchasing party is responsible for.
Revisions in previous quantity estimates
Retained Earnings [Member]
Accretion of discount
Revenue
Net changes in income taxes
Changes in estimated future development costs
Proceeds from underwritten offering
Proceeds from Issuance of Common Stock
Sales of oil and natural gas, net of production costs
State
State
us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Scenario [Axis]
Wells in Wyoming and West Texas [Member]
Represents information pertaining to the wells in Wyoming and West Texas.
Oil and Gas, Change in Standardized Measure, Discounted Future Net Cash Flow [Table Text Block]
Oil and Gas, Property and Equipment [Text Block]
Net changes in prices and production costs
Additional Paid-in Capital [Member]
WaveTech [Member}
Represents WaveTech ownership.
US Energy [Member]
Represents US Energy Ownership.
Federal
Common Stock [Member]
srt_FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows
10% annual discount factor
Federal
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Class of Treasury Stock [Table Text Block]
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow [Table Text Block]
Equity Components [Axis]
Equity Component [Domain]
Changes in unrecognized tax benefits
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 changes in unrecognized tax benefits.
Changes in unrecognized tax benefits, 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 unrecognized tax benefits.
Weighted average price per share (in dollars per share)
Share Repurchase Program, Weighted Average Price Per Share (in dollars per share)
Represents the weighted average price per share of shares repurchased in a share repurchase program.
Pretax income (loss), percent
Percentage of pretax income (loss) from continuing operations.
us-gaap_CurrentIncomeTaxExpenseBenefit
Total current income tax
Shares issued for underwriter fee
The value of shares issued for underwriter fees.
srt_ProvedDevelopedAndUndevelopedReservesProduction
Production (Barrel of Oil)
Pretax income (loss)
Net loss before income taxes
Net loss before income taxes
srt_ProvedDevelopedAndUndevelopedReservesSalesOfMineralsInPlace
Sale of minerals in place (Barrel of Oil)
useg_AssetsNoncurrentExcludingOilAndGasPropertyFullCostMethodNet
Total other assets
Represents the amount of noncurrent assets excluding oil and gas property.
Accrued costs of financing
The amount of accrued financing costs.
srt_ProvedDevelopedAndUndevelopedReservesNet
Reserve quantities, beginning of year (Barrel of Oil)
Reserve quantities, end of year (Barrel of Oil)
Revisions of previous estimates (Barrel of Oil)
Oil and Gas Properties [Member]
Purchases of minerals in place (Barrel of Oil)
Discoveries and extensions (Barrel of Oil)
Wells and Overriding Royalty Interests in Texas, Kansas, Oklahoma, and New Mexico [Member]
Represents information pertaining to wells and overriding royalty interests in Garza, Karnes and Archer County, Texas, Sumner and Pratt County, Kansas, Kay County, Oklahoma and Lea County, New Mexico.
ICFR Auditor Attestation Flag
useg_StockIssuedDuringPeriodSharesIssuedAsAPartialCommitmentFee
Stock Issued During Period, Shares, Issued as a Partial Commitment Fee (in shares)
Stock issued during the period as a partial commitment fee.
useg_StockIssuedDuringPeriodValueIssuedAsAPartialCommitmentFee
Stock Issued During Period, Value, Issued as a Partial Commitment Fee
Value of stock issued during the period as a partial commitment fee.
State and Local Jurisdiction [Member]
Crude Oil, Condensate, and Natural Gas Liquids (NGL) [Member]
us-gaap_DeferredFinanceCostsNet
Debt Issuance Costs, Net
Vehicles [Member]
Natural Gas [Member]
Income Tax Jurisdiction [Axis]
Oil and Gas, Proved Reserve, Quantity [Table Text Block]
Income Tax Jurisdiction [Domain]
Disaggregation of Revenue [Table Text Block]
Disaggregation of Revenue [Table]
Domestic Tax Jurisdiction [Member]
Petroleum Reserves [Axis]
Type of Reserve [Domain]
us-gaap_ResultsOfOperationsIncomeTaxExpense
Income tax (expense) benefit
Revenue from Contract with Customer [Text Block]
us-gaap_ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts
Results of operations from oil and natural gas producing activities
Document Annual Report
Cash and Cash Equivalents, Policy [Policy Text Block]
Receivable [Policy Text Block]
us-gaap_ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions
Depletion
Entity Incorporation, State or Country Code
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits
Accounting Policies [Abstract]
us-gaap_ResultsOfOperationsRevenueFromOilAndGasProducingActivities
Oil and natural gas sales
us-gaap_OpenTaxYear
Open Tax Year
Document Transition Report
Document Financial Statement Error Correction [Flag]
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
Entity Interactive Data Current
Related Party [Member]
Oil and Gas, Result of Operation, Producing Activity [Table Text Block]
Oil and Gas, Result of Operation, Producing Activity [Table]
Document Financial Statement Restatement Recovery Analysis [Flag]
Security Exchange Name
Title of 12(b) Security
Oil and Gas, Supplemental Disclosure [Text Block]
Unproved industrial gas properties
useg_AssetAcquisitionUnprovedIndustrialGasProperties
The amount of unproved industrial gas properties from an asset acquisition.
Underwritten Offering [Member]
Represents information pertaining to underwritten offerings.
Borrowings on credit facility
us-gaap_AssetRetirementObligation
Balance, beginning of year
Balance, end of year
Auditor Name
us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Subsidiary, Ownership Percentage, Noncontrolling Owner
Income Tax Contingency [Table]
Auditor Firm ID
Auditor Location
Natural Gas, Midstream [Member]
Name of Property [Axis]
Name of Property [Domain]
Dilutive effect of potentially dilutive securities (in shares)
us-gaap_RepaymentsOfNotesPayable
Payments on insurance premium finance note
Antidilutive securities (in shares)
Gathering, transportation, and treating
Amount of gathering, transportation and treating expense.
us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted weighted-average common shares outstanding (in shares)
Tax Credit Carryforward [Axis]
Tax Credit Carryforward, Name [Domain]
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
Modifications (accelerated vesting) (in shares)
The number of equity-based payment instruments, excluding stock (or unit) options, that modified / accelerated vested during the reporting period.
Statement [Table]
Statement of Financial Position [Abstract]
Diluted net loss per share (in dollars per share)
Modifications (accelerated vesting), weighted average grant date fair value (in dollars per share)
Weighted average grant date fair value of equity instruments other than stock options modified / accelerated vested in period under share-based compensation arrangement.
Basic weighted-average common shares outstanding (in shares)
Other, net, percent
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Income tax expense (benefit), percent
Basic and diluted loss per share (in dollars per share)
Effects of tax law changes, percent
Changes in valuation allowance, percent
Statement of Cash Flows [Abstract]
Oil and Natural Gas Properties [Member]
Represents oil and natural gas properties.
Industrial Gas Properties Policy [Policy Text Block]
Disclosure of accounting policy for industrial gas property which may include the basis of such assets, depreciation methods used and estimated useful lives, the entity's capitalization policy, including its accounting treatment for costs incurred for repairs and maintenance activities, whether such asset balances include capitalized interest and the method by which such is calculated, how disposals of such assets are accounted for and how impairment of such assets is assessed and recognized.
Statement of Stockholders' Equity [Abstract]
Lease Contractual Term [Domain]
Lease Contractual Term [Axis]
Income Statement [Abstract]
Industrial Gas Properties [Member]
Represents industrial gas properties.
us-gaap_RepaymentsOfDebt
Payments on credit facility
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Nondeductible expenses, percent
Asset Acquisition [Axis]
us-gaap_AssetAcquisitionConsiderationTransferred
Asset Acquisition, Consideration Transferred
Total consideration paid
Applicable Margin [Member]
Represents Applicable Margin.
srt_StockRepurchaseProgramAuthorizedAmount1
Stock Repurchase Program, Authorized Amount
useg_PercentageOfReserveVolumeSold
Percentage of Reserve Volume Sold
Percentage of reserve volume sold.
useg_PercentageOfReserveValueSold
Percentage of Reserve Value Sold
Percentage of reserve value sold.
us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits
Tax credits, percent
State income taxes, net of federal benefit, percent
Transaction costs
useg_InvestmentOwnedCostToSell
Estimated cost to sell shares
Cost to sell the investment.
Other Commitments [Table]
Foreign tax effects, percent
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
us-gaap_LiabilitiesNoncurrent
Total noncurrent liabilities
Anfield Energy [Member]
Represents Anfield Energy.
Other, net
Cash flows from financing activities:
Value of 1,400,000 shares issued
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable
Tax at U.S. federal statutory rate (21%), percent
Effects of tax law changes
Purchaser C [Member]
Relating to purchaser C.
Asset Acquisition [Domain]
Changes in valuation allowance
useg_AssetAcquisitionContingentConsiderationPercentageOfGainOnSaleOfInitialGasProcessingPlant
Asset Acquisition, Contingent Consideration, Percentage of Gain on Sale of Initial Gas Processing Plant
Percentage of gain on sale of initial gas processing plant to be paid as contingent consideration of the asset acquisition.
useg_BeneficialOwnershipPercentage
Beneficial Ownership Percentage
Percentage of beneficial ownership.
Schedule of Property and Equipment, Useful Life [Table Text Block]
Tabular disclosure of the useful life of property and equipment.
useg_AssetAcquisitionRepaymentOfCapitalCostsPeriodFromClosingDate
Asset Acquisition, Repayment of Capital Costs, Period From Closing Date (Month)
Period from the closing date that capital costs will be repaid under the asset acquisition.
Asset Acquisition [Table Text Block]
useg_BaseRentPerArea
Base Rent Per Area (in USD per Per Share)
Represents the base rent per area.
Lease Agreement for Office Space in Houston, Texas [Member]
Relating to lease agreement for office space in Houston, Texas.
Underwriting Agreement [Member]
Represents the Underwriting Agreement.
Computers and Software [Member]
Relating to computers and software.
Exploration
Development (1)
us-gaap_CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities
Total
Offsetting Assets [Table]
Proved property acquisition
Banner Oil & Gas, LLC [Member]
Represents Banner Oil & Gas, LLC.
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Table Text Block]
Sage Road Energy II, LP [Member]
Represents Sage Road Energy II, LP.
us-gaap_StockholdersEquity
Total shareholders’ equity
Balance
Balance
Right of use asset amortization
Woodford Petroleum, LLC [Member]
Represents Woodford Petroleum, LLC.
Nondeductible expenses
Joint interest billings receivable, allowance
Amount of allowance on joint venture billing receivable.
Class of Stock [Axis]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term (Year)
Reclassification, Type [Domain]
Reclassification, Type [Axis]
us-gaap_DerivativeFixedInterestRate
Derivative, Fixed Interest Rate
us-gaap_IncomeTaxReconciliationTaxCredits
Tax credits
State income taxes, net of federal benefit
Foreign tax effects