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SCHEDULE OF STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS (Details) (Parenthetical) | Dec. 31, 2021 | Dec. 31, 2020
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Extractive Industries [Abstract] |  |
Annual Discount factor | 10.00% | 10.00%

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- Definition Annual Discount factor. + References No definition available. + Details
Name: | USEG_FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscount
Namespace Prefix: | USEG_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | srt_ExtractiveIndustriesAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration