Note 2 - Acquisitions (Details Textual) $ in Millions	Jan. 07, 2025 USD ($) a shares
Property [Member] \| Kevin Dome Structure [Member] \| Synergy Purchase Agreement [Member]
Oil and Gas, Undeveloped Acreage, Net (Acre) \| a	24,000
Payments to Acquire Productive Assets	$ 2.0
Asset Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) \| shares	1,400,000
Asset Acquisition, Consideration Transferred, Equity Interests Issued or Issuable, Percentage of Outstanding Stock	4.76%
Asset Acquisition, Percentage of Capital Costs Responsible for	100.00%
Asset Acquisition, Repayment of Capital Costs, Period From Closing Date (Month)	78 months
Asset Acqusition, Amount of Capital Costs Incurred Related to Selling Party	$ 20.0
Asset Acquisition, Contingent Consideration, Percentage of Gain on Sale of Initial Gas Processing Plant	18.00%
Asset Acquisition, Consideration Transferred	$ 4.7
Synergy Offshore LLC [Member] \| Property [Member] \| Kevin Dome Structure [Member] \| Synergy Purchase Agreement [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner	20.00%
Synergy Offshore LLC [Member] \| Board of Directors Chairman [Member]
Beneficial Ownership Percentage	60.00%

Leased area representing summation of fractional ownership working interest to whole on which oil and gas wells have not been drilled or completed that would permit production of economic quantities of oil and gas. Excludes area of undrilled acreage held by production under terms of lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-K (SK)
-Number 229
-Section 1208
-Paragraph b
-Publisher SEC

+ Details

Name:	srt_GasAndOilAreaUndevelopedNet
Namespace Prefix:	srt_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 55
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479908/805-50-55-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480060/805-50-25-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-2

+ Details

Name:	us-gaap_AssetAcquisitionConsiderationTransferred
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480060/805-50-25-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (c)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

+ Details

Name:	us-gaap_PaymentsToAcquireProductiveAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of outstanding stock for equity interest issued or issuable as consideration for the asset acquisition.

+ References

No definition available.

+ Details

Name:	useg_AssetAcquisitionConsiderationTransferredEquityInterestsIssuedOrIssuablePercentageOfOutstandingStock
Namespace Prefix:	useg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of gain on sale of initial gas processing plant to be paid as contingent consideration of the asset acquisition.

+ References

No definition available.

+ Details

Name:	useg_AssetAcquisitionContingentConsiderationPercentageOfGainOnSaleOfInitialGasProcessingPlant
Namespace Prefix:	useg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares of equity interests issued or issuable to acquire assets.

+ References

No definition available.

+ Details

Name:	useg_AssetAcquisitionEquityInterestIssuedOrIssuableNumberOfShares
Namespace Prefix:	useg_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of capital costs that the purchasing party is responsible for.

+ References

No definition available.

+ Details

Name:	useg_AssetAcquisitionPercentageOfCapitalCostsResponsibleFor
Namespace Prefix:	useg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period from the closing date that capital costs will be repaid under the asset acquisition.

+ References

No definition available.

+ Details

Name:	useg_AssetAcquisitionRepaymentOfCapitalCostsPeriodFromClosingDate
Namespace Prefix:	useg_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of capital costs that the selling party is responsible for in an asset acquisition.

+ References

No definition available.

+ Details

Name:	useg_AssetAcqusitionAmountOfCapitalCostsIncurredRelatedToSellingParty
Namespace Prefix:	useg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of beneficial ownership.

+ References

No definition available.

+ Details

Name:	useg_BeneficialOwnershipPercentage
Namespace Prefix:	useg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_AssetAcquisitionAxis=useg_PropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=useg_KevinDomeStructureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=useg_SynergyPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=useg_SynergyOffshoreLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_BoardOfDirectorsChairmanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: