Note 10 - Asset Retirement Obligations - Undiscounted Amounts of Estimated Cash Flows for the Next Five Fiscal Years and Beyond (Details)	Apr. 30, 2019 USD ($)
Fiscal 2019
Fiscal 2020
Fiscal 2021
Fiscal 2022
Fiscal 2023	148,391
Remaining balance	7,127,113
	$ 7,275,504

Amount of estimated cash flows associated with the asset retirement obligation.

No definition available.

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Namespace Prefix:	uec_
Data Type:	xbrli:monetaryItemType
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- Definition

The estimated amounts and timing of cash flows and assumptions used for asset retirement obligation due after the fifth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	uec_UndiscountedAmountOfEstimatedCashFlowsDueAfterFifthYear
Namespace Prefix:	uec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The estimated amounts and timing of cash flows and assumptions used for asset retirement obligation in the fifth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	uec_UndiscountedAmountOfEstimatedCashFlowsDueInFifthYear
Namespace Prefix:	uec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The estimated amounts and timing of cash flows and assumptions used for asset retirement obligation due in the fourth fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	uec_UndiscountedAmountOfEstimatedCashFlowsDueInFourthYear
Namespace Prefix:	uec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The estimated amounts and timing of cash flows and assumptions used for asset retirement obligation due in next twelve months.

+ References

No definition available.

+ Details

Name:	uec_UndiscountedAmountOfEstimatedCashFlowsDueInNextTwelveMonths
Namespace Prefix:	uec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The estimated amounts and timing of cash flows and assumptions used for asset retirement obligation due in the second fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	uec_UndiscountedAmountOfEstimatedCashFlowsDueInSecondYear
Namespace Prefix:	uec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The estimated amounts and timing of cash flows and assumptions used for asset retirement obligation due in the third fiscal year following the latest fiscal year.

+ References

No definition available.

+ Details

Name:	uec_UndiscountedAmountOfEstimatedCashFlowsDueInThirdYear
Namespace Prefix:	uec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant