Deferred Revenue (Tables)

12 Months Ended

Dec. 31, 2024

Deferred Revenues Disclosure [Abstract]

Summary of deferred revenue balance

	At December 31		At December 31
(in thousands)	2024		2023
Deferred revenue-pre-sold toll milling:
CLJV Toll Milling-Ecora	$	33,993	$	34,958
	$	33,993	$	34,958
Deferred revenue-by balance sheet presentation:
Current	$	4,501	$	4,535
Non-current		29,492		30,423
	$	33,993	$	34,958

Summary of deferred revenue liability continuity

(in thousands)	2024		2023
Balance-January 1	$	34,958	$	33,295
Revenue recognized during the period (note 18)		(4,023)		(1,855)
Accretion (note 17)		3,058		3,518
Balance-December 31	$	33,993	$	34,958