Document And Entity Information Note To Financial Statement Details Textual Commodity derivative loss, net Significant Accounting Policies Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block] Note 3 - Revenue Recognition Note 4 - Leases Note 6 - Debt Note 7 - Commodity Derivatives Note 9 - Shareholders' Equity Note 10 - Asset Retirement Obligations Noncurrent liabilities: Note 12 - Income (Loss) Per Share Note 13 - Fair Value Measurements Income Tax Disclosure [Text Block] Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities Credit facility Note 15 - Supplemental Disclosures of Cash Flow Information Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) Note 3 - Revenue Recognition - Schedule of Concentration Risk (Details) Note 4 - Leases - Lease Cost (Details) us-gaap_LiabilitiesCurrent Total current liabilities Note 4 - Leases - Schedule of Operating Lease Maturity (Details) Schedule of Debt [Table Text Block] Note 6 - Debt - Schedule of Debt (Details) Note 7 - Commodity Derivatives - Schedule of Derivative Gains (Details) Note 9 - Shareholders' Equity - Stock Option Activity (Details) us-gaap_AssetRetirementObligationCurrent Asset retirement obligations - current Note 9 - Shareholders' Equity - Schedule of Stock Option by Exercise Price (Details) Note 9 - Shareholders' Equity - Restricted Stock Activity (Details) Note 9 - Shareholders' Equity - Activity in Share Repurchase Program (Details) Schedule of Other Current Assets [Table Text Block] Note 10 - Asset Retirement Obligation - Schedule of Asset Retirement Obligations (Details) Note 12 - Income (Loss) Per Share - Schedule of Loss Per Share (Details) Synergy Offshore LLC [Member] Information pertaining to the related parties. Note 12 - Income (Loss) Per Share - Schedule of Antidilutive Securities (Details) Note 13 - Fair Value Measurements - Schedule of Fair Value Assets Measured on Recurring Basis (Details) Note 14 - Other Current Assets and Accounts Payable and Accrued Liabilities - Schedule of Other Current Assets (Details) 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) Share-Based Payment Arrangement, Option, Activity [Table Text Block] Notes To Financial Statements Notes To Financial Statements [Abstract] Granted, weighted average grant date fair value (in dollars per share) Vested, weighted average grant date fair value (in dollars per share) 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) Accrued compensation and benefits us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber Non-vested restricted stock (in shares) Non-vested restricted stock (in shares) Granted (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod Vested (in shares) Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] us-gaap_PaymentsToAcquireInvestments Payments to Acquire Investments Commodity Contract [Member] Exercise Price Range 1 [Member] Relating to exercise price range 1. Stock options outstanding and exercisable, exercise price (in dollars per share) 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] Stock options outstanding and exercisable (in shares) us-gaap_OtherAccruedLiabilitiesCurrent Other us-gaap_PolicyTextBlockAbstract Accounting Policies Schedule of Asset Retirement Obligations [Table Text Block] us-gaap_PaymentsToAcquireProductiveAssets Payments to Acquire Productive Assets us-gaap_StockIssued1 Common stock issued for acquisition of industrial gas properties us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) Accounts payable Basic and diluted weighted average shares outstanding (in shares) us-gaap_PaymentsToExploreAndDevelopOilAndGasProperties Capital expenditures Current liabilities: Payments on operating lease liability us-gaap_PaymentsToAcquireOilAndGasProperty Acquisition of industrial gas properties us-gaap_Assets Total assets 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 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 Sage Road Capital, LLC [Member] Information by name of issuer of investment. useg_OilAndGasAndOtherPropertiesFullCostMethodPropertyAndEquipmentAfterAccumulatedDepletion Oil, natural gas and industrial gas properties, net Represents, after accumulated depletion, of oil and gas and other properties subject to amortization accounted for under full cost method. Property [Member] Pertains to the properties acquired. 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] 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 Securities [Axis] Antidilutive Securities, Name [Domain] Commitments and Contingencies Disclosure [Text Block] Property and equipment, net 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 us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments Losses (gains) 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. us-gaap_OperatingExpenses Total operating expenses us-gaap_DebtInstrumentTerm Debt Instrument, Term (Year) Production taxes General and administrative expenses Cash and equivalents us-gaap_AllocatedShareBasedCompensationExpense Share-Based Payment Arrangement, Expense Payments of asset retirement obligations Accretion Amendment Flag City Area Code Use of Estimates, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Balance (in shares) 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. 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 Document Information [Line Items] Document Information [Table] 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] Share Value Variable Rate [Domain] Impairment and loss on real estate held for sale Total commodity derivative settlement gain (loss) 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. Variable Rate [Axis] Concentration risk percentage 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 Depreciation, depletion, accretion and amortization Entity Registrant Name Stock-based compensation Entity [Domain] Customer Concentration Risk [Member] Legal Entity [Axis] Entity Address, Address Line One Offering costs Plugged Represents the amount of asset retirement obligations plugged during the period. ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] 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] Concentration Risk Type [Domain] Shares repurchased (in shares) Stock Repurchased During Period, Shares (in shares) Share repurchases (in shares) Entity Common Stock, Shares Outstanding Trading Arrangements, by Individual [Table] Value of shares repurchased Stock Repurchased During Period, Value Share repurchases Shares issued for acquisition of industrial gas properties Revenue Benchmark [Member] Joint interest billings receivable 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 and oil and natural gas property accruals Represents the amount of operating expense and oil and gas property accruals. Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Shares issued for acquisition of industrial gas properties (in shares) Asset retirement obligations Represents the amount of asset retirement obligation incurred. Local Phone Number Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) us-gaap_TableTextBlock Notes Tables Shares issued upon vesting of restricted stock awards (in shares) us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Line of Credit Facility, Maximum Borrowing Capacity Proved oil and natural gas properties Represents the amount of proved oil and gas properties measured using the full cost method. Shares issued upon vesting of restricted stock awards useg_PaymentsToAcquirePropertyPlantAndEquipmentExcludingOilAndGas Property and equipment expenditures Represents the amount of payments to acquire property, plant, and equipment, excluding oil and gas. Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Domain] Unevaluated industrial gas properties, not subject to amortization Represents the amount of unproven oil and gas properties measured using the full cost method. useg_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) us-gaap_IncreaseDecreaseInUnprovedOilAndGasProperty Oil and natural gas sales receivable Shares sold in underwritten offering, net of offering costs $1,032 (in shares) Stock Issued During Period, Shares, New Issues (in shares) us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and shareholders’ equity Shares sold in underwritten offering, net of offering costs $1,032 Related Party Transaction [Axis] Related Party Transaction [Domain] Accumulated deficit us-gaap_AssetRetirementObligationRevisionOfEstimate Cost and life revisions 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 or incurred us-gaap_AssetRetirementObligationLiabilitiesSettled Sold Asset Retirement Obligation Disclosure [Text Block] Interest expense 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 Long-term lease obligation, net of current portion Long-term lease obligation Proceeds from sale of oil and natural gas properties, net The amount of net cash proceeds from the sale of oil and gas property and equipment, net. Total lease liability us-gaap_OperatingLeaseLiability Total lease liabilities Current lease obligation Current lease obligation Subsequent Events [Text Block] Right-of-use asset us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue Total lease payments us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Less: imputed interest 2028 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 2027 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. Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Stock-based compensation us-gaap_ShareBasedCompensation Other assets 2025 Operating expenses: Accrual for repurchase of common stock Amount of accrual for repurchase of common stock. Depreciation, depletion, accretion, and amortization us-gaap_DepreciationDepletionAndAmortization us-gaap_OilAndGasPropertyFullCostMethodNet Oil and natural gas properties, net us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation 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 under full cost method and industrial gas properties: us-gaap_UnrealizedGainLossOnDerivatives Total commodity derivatives losses, net Equity [Text Block] Common stock, $0.01 par value; 245,000,000 shares authorized; 34,061,831 and 27,903,197 shares issued and outstanding at March 31, 2025 and December 31, 2024, respectively Fair value of marketable equity securities Cash received for income taxes The cash received for income taxes during the period. Adjustments to reconcile net loss to net cash used in operating activities: Common stock, authorized (in shares) Common stock, issued (in shares) Common stock, par value (in dollars per share) us-gaap_DerivativeAssetsCurrent Derivative Asset, Current Statistical Measurement [Domain] Maximum [Member] Minimum [Member] Ownership [Domain] Other current assets Total other current assets Product and Service [Axis] Product and Service [Domain] Statistical Measurement [Axis] Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Ownership [Axis] Cash paid for interest Cash Flow, Supplemental Disclosures [Text Block] Prepaid expenses Geographical [Axis] Geographical [Domain] Customer [Axis] Customer [Domain] Interest expense, net Cash flows from operating activities: Statement [Line Items] us-gaap_NumberOfOperatingSegments Number of Operating Segments Oil and natural gas sales receivables us-gaap_NumberOfReportableSegments Number of Reportable Segments Revenue: Marketable equity securities Additional paid-in capital Shareholders’ equity: Board of Directors Chairman [Member] Other income, net Long-Lived Tangible Asset [Axis] us-gaap_NonoperatingIncomeExpense Total other expense srt_AverageSalesPrices Oil and Gas, Average Sale Price Per Unit (in USD per Per Share) Long-Lived Tangible Asset [Domain] Current assets: Fair Value Disclosures [Text Block] Crude Oil [Member] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash and equivalents, beginning of period Cash and equivalents, end of period us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Net increase (decrease) in cash and equivalents Over-Allotment Option [Member] Energy [Axis] us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash provided by (used in) financing activities Other Assets: us-gaap_Liabilities Total liabilities Commitments and contingencies (Note 8) 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 us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash used in operating activities Other income (expense): Energy [Domain] us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash used in investing activities Investment, Issuer Name [Domain] Investment, Issuer Name [Axis] srt_GasAndOilAreaUndevelopedNet Oil and Gas, Undeveloped Acreage, Net (Acre) Kevin Dome Structure [Member] Represents the Kevin Dome structure property acquired. Natural Gas and Natural Gas Liquids (NGL) [Member] us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation Shares withheld to settle tax withholding obligations for restricted stock awards us-gaap_OilAndGasPropertyFullCostMethodDepletion Less accumulated depreciation, depletion and amortization us-gaap_PaymentsForRepurchaseOfCommonStock Repurchases of common stock Scenario [Domain] Forecast [Member] 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. useg_AssetAcquisitionPercentageOfCapitalCostsResponsibleFor Asset Acquisition, Percentage of Capital Costs Responsible for Represents the percentage of capital costs that the purchasing party is responsible for. Retained Earnings [Member] Revenue Proceeds from underwritten offering Proceeds from Issuance of Common Stock Scenario [Axis] Oil and Gas, Property and Equipment [Text Block] Additional Paid-in Capital [Member] Common Stock [Member] Class of Treasury Stock [Table Text Block] Equity Components [Axis] Equity Component [Domain] 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. us-gaap_ProceedsFromDerivativeInstrumentFinancingActivities Proceeds from Derivative Instrument, Financing Activities us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Net loss before income taxes useg_AssetsNoncurrentExcludingOilAndGasPropertyFullCostMethodNet Total other assets Represents the amount of noncurrent assets excluding oil and gas property. Disaggregation of Revenue [Table Text Block] us-gaap_RepaymentsOfLongTermDebt Repayments of Long-Term Debt Revenue from Contract with Customer [Text Block] Document Quarterly Report Entity Incorporation, State or Country Code us-gaap_DebtInstrumentCarryingAmount Long-Term Debt, Gross us-gaap_UnrecognizedTaxBenefits Unrecognized Tax Benefits Accounting Policies [Abstract] Document Transition Report Basis of Accounting, Policy [Policy Text Block] Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Entity Interactive Data Current Related Party [Member] Security Exchange Name Title of 12(b) Security us-gaap_AssetRetirementObligation Balance, end of period Balance, beginning of year Balance, end of period us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners Subsidiary, Ownership Percentage, Noncontrolling Owner 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) Statement [Table] Statement of Financial Position [Abstract] Basic weighted average common shares outstanding (in shares) us-gaap_EffectiveIncomeTaxRateContinuingOperations Effective Income Tax Rate Reconciliation, Percent Basic and diluted loss per share (in dollars per share) 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] Income Statement [Abstract] Industrial Gas Properties [Member] Represents industrial gas properties. Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Asset Acquisition [Axis] us-gaap_AssetAcquisitionConsiderationTransferred Asset Acquisition, Consideration Transferred Applicable Margin [Member] Represents Applicable Margin. srt_StockRepurchaseProgramAuthorizedAmount1 Stock Repurchase Program, Authorized Amount useg_InvestmentOwnedCostToSell Estimated cost to sell shares Cost to sell the investment. Fair Value, Assets Measured on Recurring Basis [Table Text Block] us-gaap_LiabilitiesNoncurrent Total noncurrent liabilities Anfield Energy [Member] Represents Anfield Energy. Cash flows from financing activities: Purchaser C [Member] Relating to purchaser C. Asset Acquisition [Domain] 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. 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. useg_AssetAcquisitionConsiderationTransferredEquityInterestsIssuedOrIssuablePercentageOfOutstandingStock Asset Acquisition, Consideration Transferred, Equity Interests Issued or Issuable, Percentage of Outstanding Stock Percentage of outstanding stock for equity interest issued or issuable as consideration for the asset acquisition. Underwriting Agreement [Member] Represents the Underwriting Agreement. Banner Oil & Gas, LLC [Member] Represents Banner Oil & Gas, LLC. Sage Road Energy II, LP [Member] Represents Sage Road Energy II, LP. Right-of-use asset amortization us-gaap_StockholdersEquity Total shareholders’ equity Balance Balance Woodford Petroleum, LLC [Member] Represents Woodford Petroleum, LLC. Class of Stock [Axis] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 Options outstanding, weighted average exercise price (in dollars per share) Options outstanding, remaining contractual term (Year) us-gaap_DerivativeFixedInterestRate Derivative, Fixed Interest Rate us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit Options outstanding, upper exercise price range (in dollars per share) us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions Options outstanding, number of shares (in shares) Exercise Price Range [Axis] Exercise Price Range [Domain] us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit Options Outstanding, lower exercise price range (in dollars per share)