XML 81 R68.htm IDEA: XBRL DOCUMENT v3.7.0.1

SIGNIFICANT CONCENTRATIONS (Details Narrative) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Concentration Risk [Line Items]
Payable to major operator	$ 2,710	$ 4,159
Oil And Gas Sales [Member] | Operator B [Member]
Concentration Risk [Line Items]
Operator liability & overpayments	2,710
Payable to major operator	$ 2,710

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: