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Note 16 - Subsequent Events (Details Textual) - Subsequent Event [Member] - Crude Oil Swaps [Member]	Apr. 02, 2024 $ / bbl bbl
Derivative, Nonmonetary Notional Amount, Volume (Barrel of Oil) | bbl	164,125
Derivative, Floor Price (in USD per Barrel of Oil) | $ / bbl	73.71

X

- Definition

Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFloorPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:volumeItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=useg_CrudeOilSwapsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: