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Shareholders' Equity - Schedule of Stock Options Activity (Details) - $ / shares	Mar. 31, 2021	Dec. 31, 2020
Stockholders' Equity Note [Abstract]
Stock options outstanding and exercisable, shares	31,367	31,367
Stock options outstanding and exercisable, price	$ 64.78	$ 64.78

X

- Definition

Stock options outstanding and exercisable, shares.

+ References

No definition available.

+ Details

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Period Type:	instant

X

- Definition

Stock options outstanding and exercisable, price.

+ References

No definition available.

+ Details

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Namespace Prefix:	USEG_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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