XML 52 R42.htm IDEA: XBRL DOCUMENT v3.21.2

REVENUE RECOGNITION (Details Narrative)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue from Contract with Customer [Abstract]
Operating revenue percentage	32.00%	14.00%	32.00%	3.00%

X

- Definition

Operating revenue, percentage.

+ References

No definition available.

+ Details

Name:	USEG_OperatingRevenuePercentage
Namespace Prefix:	USEG_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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