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OTHER LIABILITIES AND DEBT (Details) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Jun. 30, 2010
Other liabilities [Abstract] |  |  |
Deferred rent | 14,000 us-gaap_DeferredRentCreditCurrent | $ 11,000 us-gaap_DeferredRentCreditCurrent |
Remington Escrow | 0 us-gaap_DepositLiabilityCurrent | 95,000 us-gaap_DepositLiabilityCurrent |
Employee health insurance self funding | 70,000 useg_EmployeeHealthInsuranceSelfFunding | 58,000 useg_EmployeeHealthInsuranceSelfFunding |
Other current liabilities | 84,000 us-gaap_OtherLiabilitiesCurrent | 164,000 us-gaap_OtherLiabilitiesCurrent |
Other long term liabilities [Abstract] |  |  |
Accrued executive retirement costs | 1,029,000 us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent | 741,000 us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent |
Debt [Abstract] |  |  |
Less current portion | 0 useg_LongTermDebtAndOtherCurrentMaturities | 0 useg_LongTermDebtAndOtherCurrentMaturities |
Totals | 6,000,000 useg_TotalLongTermDebtAndOtherNet | 9,000,000 useg_TotalLongTermDebtAndOtherNet |
Amount borrowed | 10,000,000 us-gaap_DebtInstrumentFaceAmount |  |
Credit Facility - collateralized by oil and gas reserves, at 2.66% [Member] |  |  |
Debt [Abstract] |  |  |
Debt | 6,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember | 9,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = us-gaap_LineOfCreditMember |
Federal Funds Effective Rate [Member] |  |  |
Debt [Abstract] |  |  |
Description of variable rate basis | Federal Funds Effective Rate |  |
Basis spread on variable rate (in hundredths) | 0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_VariableRateAxis = us-gaap_FederalFundsEffectiveSwapRateMember |  |
LIBO rate for the three prior months [Member] |  |  |
Debt [Abstract] |  |  |
Description of variable rate basis | LIBO rate for the three prior months |  |
LIBO rate for the three prior months [Member] | Minimum [Member] |  |  |
Debt [Abstract] |  |  |
Basis spread on variable rate (in hundredths) | 2.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |
LIBO rate for the three prior months [Member] | Maximum [Member] |  |  |
Debt [Abstract] |  |  |
Basis spread on variable rate (in hundredths) | 3.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |
Senior Secured Revolving Credit Facility [Member] |  |  |
Debt [Abstract] |  |  |
Borrowing capacity | 100,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |
Expiration date of senior credit facility | Jul. 30, 2017 |  |
Borrowing base | 24,500,000 useg_BorrowingBase / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  | 12,000,000 useg_BorrowingBase / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember
Maturity term of senior credit facility | 6 months |  |
Commitment fee percentage (in hundredths) | 0.50%us-gaap_LineOfCreditFacilityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |
Percentage of outstanding loans and loan commitments held by lenders required, minimum (in hundredths) | 67.00%useg_PercentageOfOutstandingLoansAndLoanCommitmentsHeldByLendersRequiredMinimum / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |
Principal negative financial covenants | The principal negative financial covenants (measured at various times as provided in the Credit Agreement) do not permit (i) the Interest Coverage Ratio (Interest Expense to EBITDAX) to be less than 3.0 to 1; (ii) Total Debt to EBITDAX to be greater than 3.5 to 1; and (iii) the Current Ratio (current assets plus unused lender commitments under the Borrowing Base) to be less than 1.0 to 1.0. |  |
Minimum interest coverage ratio (in hundredths) | 3.00%useg_DebtCovenantMinimumInterestCoverageRatio / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |
Maximum total debt to EBITDAX ratio (in hundredths) | 3.50%useg_DebtCovenantMaximumTotalDebtToEbitdaxRatio / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |
Minimum current ratio (in hundredths) | 1.00%useg_DebtCovenantMinimumCurrentRatio / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |
Amount borrowed | 6,000,000 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |
Amount outstanding | 6,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |  |

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- Definition Maximum total debt to EBITDAX ratio permitted under debt covenant agreement. EBITDAX is defined in the Credit Agreement as Consolidated Net Income, plus non-cash charges. + References No definition available. + Details
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- Definition Minimum interest coverage ratio permitted under debt covenant agreement. + References No definition available. + Details
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- Definition The liability owed to the employee healthcare provider as of the balance sheet date. + References No definition available. + Details
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- Definition Carrying amount of long-term debt and other liabilities, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References No definition available. + Details
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- Definition Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition For a classified balance sheet, the cumulative difference as of the balance sheet date between the payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense, by the lessor or lessee, respectively, within one year of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39927-112707 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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