XML 75 R53.htm IDEA: XBRL DOCUMENT v3.8.0.1

Discontinued Operations - Schedule of Components of Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]
Rental revenue
Operating expenses
Net earnings for apartment complex
Water treatment plant		(254)	(1,737)
Mine property holding costs		(2,194)	(1,133)
Impairment of mining asset			(22,620)
Depreciation of mine equipment			(122)
Total expenses for mining segment		(2,448)	(25,612)
Total results for discontinued operations		$ (2,448)	$ (25,612)

X

- Definition

Amount after tax of gain (loss) not previously recognized resulting from impairment loss from discontinued operation.

+ References

No definition available.

+ Details

Name:	USEG_DiscontinuedOperationImpairmentLossOnDiscontinuedOperationNetOfTax
Namespace Prefix:	USEG_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents the Mine property holding costs.

+ References

No definition available.

+ Details

Name:	USEG_MinePropertyHoldingCosts
Namespace Prefix:	USEG_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Depreciation, depletion and amortization, and valuation provisions (impairments) related to oil and gas producing activities.

+ References

No definition available.

+ Details

Name:	USEG_ResultsOfOperationsDepreciationDepletionAndAmortizationAndValuationProvisions1
Namespace Prefix:	USEG_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of expenses related to oil and gas producing activities.

+ References

No definition available.

+ Details

Name:	USEG_ResultsOfOperationsExpenseFromOilAndGasProducingActivities1
Namespace Prefix:	USEG_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Represents the rental revenue.

+ References

No definition available.

+ Details

Name:	USEG_ResultsOfOperationsRentalRevenue
Namespace Prefix:	USEG_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Total revenues from oil and gas producing activities.

+ References

No definition available.

+ Details

Name:	USEG_ResultsOfOperationsRevenueFromOilAndGasProducingActivities1
Namespace Prefix:	USEG_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Refers to water treatment plant cost during the period.

+ References

No definition available.

+ Details

Name:	USEG_WaterTreatmentPlantCost
Namespace Prefix:	USEG_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Income before income taxes for oil and gas producing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62136-109447

+ Details

Name:	us-gaap_ResultsOfOperationsIncomeBeforeIncomeTaxes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Sales revenue to unaffiliated enterprises from oil and gas producing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62246-109447

+ Details

Name:	us-gaap_ResultsOfOperationsSalesRevenueToUnaffiliatedEnterprises
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration