XML 48 R34.htm IDEA: XBRL DOCUMENT v2.4.1.9
Segment Information (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Segment
Mar. 31, 2014
Dec. 31, 2014
Segment Reporting Information [Line Items]      
Number of reportable segments 2us-gaap_NumberOfReportableSegments    
Segment Reporting Information, Results of operations [Abstract]      
Total interest expense $ 89us-gaap_InterestIncomeExpenseNet $ 84us-gaap_InterestIncomeExpenseNet  
Operating income (loss) from identified segments (23,519)us-gaap_OperatingIncomeLoss 627us-gaap_OperatingIncomeLoss  
General and administrative expenses (1,479)useg_OtherSellingGeneralAndAdministrativeExpenseWithAircraftImpairment (1,606)useg_OtherSellingGeneralAndAdministrativeExpenseWithAircraftImpairment  
Add back Interest expenses 89us-gaap_InterestIncomeExpenseNet 84us-gaap_InterestIncomeExpenseNet  
Other revenues and expenses (184)us-gaap_OtherNonoperatingIncomeExpense (377)us-gaap_OtherNonoperatingIncomeExpense  
Income (loss) before income taxes (23,703)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 250us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest  
Depreciation depletion and amortization expense [Abstract]      
Total depreciation depletion amortization expense 2,941us-gaap_Depreciation 3,362us-gaap_Depreciation  
Assets by segment [Abstract]      
Total Assets 101,499us-gaap_Assets   123,523us-gaap_Assets
Reportable Segment [Member]      
Segment Reporting Information, Results of operations [Abstract]      
Total revenues 2,679us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
8,256us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
 
Total operating expenses 24,719us-gaap_OperatingCostsAndExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
6,023us-gaap_OperatingCostsAndExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
 
Total interest expense 89us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
84us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
 
Operating income (loss) from identified segments (22,129)us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
2,149us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
 
Add back Interest expenses 89us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
84us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
 
Reportable Segment [Member] | Oil and gas [Member]      
Segment Reporting Information, Results of operations [Abstract]      
Total revenues 2,679us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
8,256us-gaap_Revenues
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
 
Total operating expenses 23,966us-gaap_OperatingCostsAndExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
5,266us-gaap_OperatingCostsAndExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
 
Total interest expense 89us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
84us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
 
Operating income (loss) from identified segments (21,376)us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
2,906us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
 
Add back Interest expenses 89us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
84us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
 
Depreciation depletion and amortization expense [Abstract]      
Total depreciation depletion amortization expense 2,874us-gaap_Depreciation
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
3,294us-gaap_Depreciation
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
 
Assets by segment [Abstract]      
Total Assets 73,001us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
  92,020us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= useg_OilAndGasMember
Reportable Segment [Member] | Mineral properties [Member]      
Segment Reporting Information, Results of operations [Abstract]      
Total operating expenses 753us-gaap_OperatingCostsAndExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
757us-gaap_OperatingCostsAndExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
 
Total interest expense 0us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
0us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
 
Operating income (loss) from identified segments (753)us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
(757)us-gaap_OperatingIncomeLoss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
 
Add back Interest expenses 0us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
0us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
 
Depreciation depletion and amortization expense [Abstract]      
Total depreciation depletion amortization expense 31us-gaap_Depreciation
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
31us-gaap_Depreciation
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
 
Assets by segment [Abstract]      
Total Assets 21,945us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
  21,942us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_MiningPropertiesAndMineralRightsMember
Corporate, Non-Segment [Member]      
Depreciation depletion and amortization expense [Abstract]      
Total depreciation depletion amortization expense 36us-gaap_Depreciation
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
37us-gaap_Depreciation
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
 
Assets by segment [Abstract]      
Total Assets $ 6,553us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
  $ 9,561us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember