Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The ratio of consolidated current assets to consolidated current liabilities required by the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	useg_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The ratio of total debt to EBITDAX required under the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	useg_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of existing borrowing base for restricted payment under covenant of the debt instrument.

+ References

No definition available.

+ Details

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

- Definition

The percent related to the unused borrowing amount of the debt instrument.

+ References

No definition available.

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Balance Type:
Period Type:

- Details

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- Details

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- Details

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Note 6 - Debt (Details Textual) $ in Millions	Jan. 05, 2022 USD ($)	Dec. 31, 2025 USD ($)	Aug. 01, 2025 USD ($)	Jul. 26, 2022 USD ($)
Credit Agreement [Member]
Debt Instrument, Term (Year)	4 years
Debt Instrument, Face Amount	$ 15		$ 10	$ 20
Line of Credit Facility, Maximum Borrowing Capacity	$ 100
Debt Issuance Costs, Net		$ 53
Debt Instrument, Unused Borrowing Fee, Percent		0.50%
Debt Instrument, Covenant, Ratio of Total Debt to EBITDAX	3
Debt Instrument, Covenant, Ratio of Consolidated Current Assets to Consolidated Current Liabilities	1
Credit Agreement [Member] \| Minimum [Member]
Debt Instrument, Covenant, Restricted Payment, Percentage of Existing Borrowing Base	20.00%
Credit Agreement [Member] \| Fed Funds Effective Rate Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Credit Agreement [Member] \| Applicable Margin [Member] \| Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	0.25%
Credit Agreement [Member] \| Applicable Margin [Member] \| Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	1.25%
Amended Credit Agreement [Member]
Debt Issuance Costs, Net		$ 60