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Note 2 - Acquisitions - Asset Acquisitions (Details) (Parentheticals) | Jan. 05, 2022 shares
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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: |