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Note 4 - Leases (Details Textual) - Lease Agreement for Office Space in Houston, Texas [Member] | Dec. 31, 2023 $ / ft²
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Lessee, Operating Lease, Term of Contract (Month) | 67 months
Base Rent Per Area (in USD per Square Foot) | 0.5

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents the base rent per area. + References No definition available. + Details
Name: | useg_BaseRentPerArea
Namespace Prefix: | useg_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_LeaseContractualTermAxis=useg_LeaseAgreementForOfficeSpaceInHoustonTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |