CONDENSED CONSOLIDATED INTERIM STATEMENTS OF OPERATIONS (Parenthetical)	3 Months Ended	12 Months Ended
Feb. 28, 2026	Feb. 28, 2025	Nov. 30, 2025
CONDENSED CONSOLIDATED INTERIM STATEMENTS OF OPERATIONS
Exchange ratio	5.8349	5.8349	5.8349

Exchange ratio for reverse recapitalization transaction for nonredeemable common stock.

No definition available.

Name:	nucl_ReverseRecapitalizationExchangeRatioForNonredeemableCommonStock
Namespace Prefix:	nucl_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration