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

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

No definition available.

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