XML 98 R76.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Unaudited Supplemental Oil and Gas Information - Schedule of Prices as Adjusted for Transportation, Quality (Details) | 12 Months Ended
--- | ---
Dec. 31, 2017 $ / bbl $ / Mcf | Dec. 31, 2016 $ / bbl $ / Mcf | Dec. 31, 2015 $ / bbl $ / Mcf
Oil (bbls) [Member] |  |  |  |
Sales Prices | $ / bbl |  | 51.34 | 42.75 | 43.54
Natural Gas (mcfe) [Member] |  |  |  |
Sales Prices |  | 2.98 |  |
Natural Gas (mcfe) [Member] |  |  |  |
Sales Prices | [1] | 2.98 | 2.48 | 3.36
[1] | Consists of the weighted average price for natural gas in mcf plus NGL’s converted to mcf using a factor of 6 mcf for each barrel of NGL.

X
- Definition The revenues derived from sales of oil or gas in each geographic area during the reporting period divided by the number of barrels of oil produced or thousands of cubic feet of gas produced. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1204 -Paragraph (b) -Subparagraph (1) + Details
Name: | us-gaap_AverageSalesPrices
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ReserveQuantitiesByTypeOfReserveAxis=us-gaap_OilReservesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReserveQuantitiesByTypeOfReserveAxis=USEG_NaturalGasMCFEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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