XML 92 R73.htm IDEA: XBRL DOCUMENT
v3.3.1.900

SIGNIFICANT CONCENTRATIONS (Details Narrative) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Concentration Risk [Line Items] |  |
Payable to major operator | $ 4,159 | $ 5,189
Oil And Gas Sales [Member] | Operator B [Member] |  |
Concentration Risk [Line Items] |  |
Operator liability & overpayments | 4,159 |
Payable to major operator | $ 4,159 |

X
- 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
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Current regulatory liabilities generally represent obligations to make refunds to customers for various reasons including overpayment. + References No definition available. + Details
Name: | us-gaap_CustomerRefundLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Refers to carrying amount of customer liability curent as on balnce sheet date, + References No definition available. + Details
Name: | useg_CustomerLiabilityCurent
Namespace Prefix: | useg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=useg_CustomerConcentrationRisk1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |