MINERAL RIGHTS (Details)		9 Months Ended
Nov. 18, 2024 USD ($) D lb	Aug. 31, 2026 USD ($)
MINERAL RIGHTS
Beginning balance		$ 1,201,390
Ending balance		12,755,725
Aurora Uranium Project
MINERAL RIGHTS
Beginning balance		1,201,390
Reimbursement of mining operations expenditures		18,155
Acquisition of Oregon Energy		11,536,180
Ending balance		$ 12,755,725
Increase in value of common shares issued	$ 5,000,000
Trading days	30 days
Threshold consecutive trading days prior to announcement of mineral resource update \| D	30
Threshold consecutive trading days prior to announcement of pre-feasibility study \| D	30
Aurora Uranium Project \| Mineral Resource of At Least 40 Million Pounds
MINERAL RIGHTS
Minimum volume of mineral resource \| lb	40,000,000
Value of common shares issued	$ 4,000,000
Aurora Uranium Project \| Mineral Resource for Additional 1,000,000 Pound
MINERAL RIGHTS
Additional volume of mineral resource \| lb	1,000,000
Increase in value of common shares issued	$ 200,000
Aurora Uranium Project \| Mineral Resource for Additional 1,000,000 Pound \| Maximum
MINERAL RIGHTS
Value of common shares issued	5,000,000
Increase in value of common shares issued	$ 1,000,000

Amount of increase in mineral properties from acquisition of rights during the period.

No definition available.

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Namespace Prefix:	nucl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of reimbursements under the mineral properties.

+ References

No definition available.

+ Details

Name:	nucl_MineralPropertiesReimbursements
Namespace Prefix:	nucl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The additional volume of mineral resource identified under the mineral rights agreement.

+ References

No definition available.

+ Details

Name:	nucl_MineralResourceAdditionalVolume
Namespace Prefix:	nucl_
Data Type:	dtr-types:massItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum volume of mineral resource identified under the mineral rights agreement.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:massItemType
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Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	nucl_MineralRightsLineItems
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Period Type:	duration

- Definition

The increase in value of shares issued for the mining rights acquired in the transaction.

+ References

No definition available.

+ Details

Name:	nucl_MineralRightsSharesTransferredIncreaseInValue
Namespace Prefix:	nucl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The number of threshold consecutive trading days prior to announcement of mineral resource update considered in the determination of volume-weighted average trading price for issuance of common shares for mining rights acquired in the transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	nucl_
Data Type:	xbrli:integerItemType
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Period Type:	duration

- Definition

The number of threshold consecutive trading days prior to announcement of pre-feasibility study considered in the determination of volume-weighted average trading price for issuance of common shares for mining rights acquired in the transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	nucl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of threshold trading days based on which the volume-weighted average trading price is determined for issuance of common shares for mining rights acquired in the transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	nucl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The value of shares issued for the mining rights acquired in the transaction.

+ References

No definition available.

+ Details

Name:	nucl_MineralRightsSharesTransferredValue
Namespace Prefix:	nucl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Mineral properties, net of adjustments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482099/360-10-50-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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