Reclamation and Remediation - Changes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Asset Retirement Obligation, Roll Forward Analysis
Reclamation liabilities - balance at beginning of period	$ 1,949	$ 1,833
Foreign currency exchange loss	284	116
Reclamation liabilities - balance at end of period	2,233	1,949
Asset retirement obligation - balance at beginning of period	8,417	1,279
Changes in estimate	(1,221)	6,384
Liability for Aquila drillhole capping	404
Accretion	689	668
Foreign currency exchange loss	1,273	86
Asset retirement obligation - balance at end of period	9,562	8,417
Reclamation and remediation liabilities	$ 11,795	$ 10,366