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Note 2 - Acquisitions - Asset Acquisitions (Details) (Parentheticals)	Jan. 05, 2022 shares
January 2022 Acquisition [Member]
Shares issued (in shares)	19,905,736

X

- 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

X

- Details

Name:	us-gaap_AssetAcquisitionAxis=useg_January2022AcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: