Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement of Comprehensive Income [Abstract]
Net income ( loss)	$ (44,614)	$ (8,835)	$ (42,101)	$ (34,222)
Other comprehensive gain (loss), (net of tax)
Foreign currency translation adjustment	6,387	1,264	6,196	1,329
Total other comprehensive gain, (net of tax)	6,387	1,264	6,196	1,329
Comprehensive loss	(38,227)	(7,571)	(35,905)	(32,893)
Comprehensive loss attributable to non-controlling interests	(3,166)	(2,509)	(6,057)	(3,653)
Comprehensive loss attributable to enCore Energy Corp.	$ (35,061)	$ (5,062)	$ (29,848)	$ (29,240)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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