XML 52 R27.htm IDEA: XBRL DOCUMENT v2.4.0.6

Basis of Presentation (Details)	Sep. 30, 2012
Basis of Presentation [Abstract]
Percentage of ownership in entities for accounting under equity method, minimum (in hundredths)	20.00%

X

- Definition

Represents the minimum percentage of ownership in entities for accounting under equity method.

+ References

No definition available.

+ Details

Name:	useg_MinimumPercentageOfOwnershipInEntitiesForAccountingUnderEquityMethod
Namespace Prefix:	useg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration