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ORGANIZATION, OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) | 12 Months Ended
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Dec. 31, 2016
Property, Plant and Equipment [Line Items] |
Percentage of estimated future net revenue, discounted | 10.00%
Mining Equipment [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Estimated useful lives | 10 years
Mining Equipment [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Estimated useful lives | 20 years

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represent information about the percentage of estimated future net revenue discounted during the reporting period. + References No definition available. + Details
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Namespace Prefix: | useg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |