XML 38 R27.htm IDEA: XBRL DOCUMENT v3.8.0.1

COMMODITY PRICE RISK DERIVATIVES (Details 1) - Natural Gas [Member] - Swap [Member]	9 Months Ended
	Sep. 30, 2017 $ / Mcf Mcf
Begin	Jan. 01, 2018
End	Dec. 31, 2018
Quantity | Mcf	500
Price (in dollars per unit) | $ / Mcf	3.01

X

- Definition

The average consolidated production costs (lifting costs) per unit of production. Costs may include costs incurred to operate and maintain wells and equipment and to pay production taxes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1204
-Paragraph (b)
-Subparagraph (2)

+ Details

Name:	us-gaap_ConsolidatedOilAndGasProductionCostsPerUnitOfProduction
Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date the entity entered into the derivative contract, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeInceptionDates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeMaturityDates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

It represents as a qutstanding natural gas quantity.

+ References

No definition available.

+ Details

Name:	useg_OutstandingNaturalGasQuantity
Namespace Prefix:	useg_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ReserveQuantitiesByTypeOfReserveAxis=us-gaap_NaturalGasReservesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_SwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: