The minimum amount to be raised on listing event.

No definition available.

Name:	nucl_ListingEventMinimumAmount
Namespace Prefix:	nucl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Name:	nucl_MineralResourceMinimumVolume
Namespace Prefix:	nucl_
Data Type:	dtr-types:massItemType
Balance Type:	na
Period Type:	duration

- Definition

The period for extension to exercise the right under the agreement.

+ References

No definition available.

+ Details

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

- Definition

The amount of expenses incurred for the mining rights acquired in the transaction.

+ References

No definition available.

+ Details

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

- Definition

The amount of consideration for repurchase of full of the net smelter return royalty

+ References

No definition available.

+ Details

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

- Definition

The amount of consideration for repurchase of half of the net smelter return royalty

+ References

No definition available.

+ Details

Name:	nucl_MineralRightsHalfRepurchaseConsiderationForRepurchaseOfNetSmelterRevenue
Namespace Prefix:	nucl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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
Namespace Prefix:	nucl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of net smelter return royalty payable, under the mining rights transaction.

+ References

No definition available.

+ Details

Name:	nucl_MineralRightsNetSmelterReturnsRoyaltyPercentage
Namespace Prefix:	nucl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of consideration payments to be made for the mining rights acquired in the transaction.

+ References

No definition available.

+ Details

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

- Definition

The percentage of ownership interests in the mineral rights property acquired during the period.

+ References

No definition available.

+ Details

Name:	nucl_MineralRightsPercentageOfInterestsInPropertyAcquired
Namespace Prefix:	nucl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of reimbursements made under the mineral rights agreement.

+ References

No definition available.

+ Details

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

- Definition

The amount of reimbursements payable under the mineral rights agreement.

+ References

No definition available.

+ Details

Name:	nucl_MineralRightsReimbursementsPayable
Namespace Prefix:	nucl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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 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

Name:	nucl_MineralRightsSharesTransferredThresholdTradingDays
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

The number of mining claims.

+ References

No definition available.

+ Details

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

- Definition

The number of mining claims closed during the period.

+ References

No definition available.

+ Details

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

- Definition

The percentage of increase in spot price.

+ References

No definition available.

+ Details

Name:	nucl_PercentageOfIncreaseInSpotPrice
Namespace Prefix:	nucl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of voting equity interest acquired in business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-8

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
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-Name Accounting Standards Codification
-Section 55
-Paragraph 38
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479303/805-10-55-38

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-2

+ Details

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow from the acquisition of a mineral right which is the right to extract a mineral from the earth or to receive payment, in the form of royalty, for the extraction of minerals.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

+ Details

Name:	us-gaap_PaymentsToAcquireMineralRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=nucl_OregonEnergyLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=nucl_AuroraUraniumProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	srt_StatementScenarioAxis=nucl_MineralResourceOfAtLeast40MillionPoundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=nucl_MineralResourceForAdditionalOneMillionPoundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=nucl_MineralRightsFirstExtensionTermMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=nucl_MineralRightsSecondExtensionTermMember
Namespace Prefix:
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MINERAL RIGHTS - Aurora Uranium Project (Details)								12 Months Ended
MINERAL RIGHTS - Aurora Uranium Project (Details)	Nov. 30, 2025 USD ($)	Nov. 26, 2025	Nov. 18, 2025 USD ($)	Jul. 14, 2025 item	May 18, 2025 USD ($)	Dec. 18, 2024 USD ($)	Nov. 18, 2024 USD ($) item lb	Nov. 30, 2025 USD ($)	Nov. 30, 2024 USD ($)
MINERAL RIGHTS
Cash paid as consideration								$ 1,193,415	$ 70,000
Oregon Energy LLC
MINERAL RIGHTS
Ownership percentage acquired							100.00%
Aurora Uranium Project
MINERAL RIGHTS
Percentage of interests acquired							100.00%
Number of mining claims \| item				361			365
NSR Royalty, percentage							1.00%
Consideration for half repurchase of NSR							$ 1,000,000
Consideration for full repurchase of NSR							2,000,000
Cash paid as consideration						$ 300,000
Value of common shares issued							16,000,000
Minimum amount raised in connection with Listing Event							6,800,000
Increase in value of common shares issued							$ 5,000,000
Percentage increase in the spot price							50.00%
Trading days							30 days
Extension term							6 months
Payments for extension					$ 300,000
Reimbursements made	$ 193,415
Reimbursements payable	$ 7,975							$ 7,975
Number of mining claims closed \| item				4
Aurora Uranium Project \| Maximum
MINERAL RIGHTS
Expenditure incurred			$ 500,000
Aurora Uranium Project \| Mineral Resource of At Least 40 Million Pounds
MINERAL RIGHTS
Value of common shares issued							$ 20,000,000
Minimum volume of mineral resource \| lb							40
Increase in value of common shares issued							$ 4,000,000
Aurora Uranium Project \| Mineral Resource for Additional 1,000,000 Pound
MINERAL RIGHTS
Increase in value of common shares issued							$ 200,000
Additional volume of mineral resource \| lb							1,000,000
Aurora Uranium Project \| Mineral Resource for Additional 1,000,000 Pound \| Maximum
MINERAL RIGHTS
Value of common shares issued							$ 21,000,000
Increase in value of common shares issued							$ 1,000,000
Aurora Uranium Project \| First Six-Month Extension
MINERAL RIGHTS
Extension term					6 months		6 months
Payments for extension							$ 300,000
Expenditure incurred							$ 250,000
Aurora Uranium Project \| Second Six-Month Extension
MINERAL RIGHTS
Extension term		225 days	6 months				6 months
Payments for extension			$ 400,000				$ 400,000
Expenditure incurred							$ 250,000