Reclamation and Remediation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis
Reclamation liabilities - balance at beginning of period	$ 2,003	$ 1,916
Foreign currency exchange (gain) loss	(113)	87
Reclamation liabilities - balance at end of period	1,890	2,003
Asset retirement obligation - balance at beginning of period	1,105	586
Changes in estimate	82	443
Accretion	79	48
Foreign currency exchange (gain) loss	(58)	28
Asset retirement obligation - balance at end of period	1,208	1,105
Total period end balance	3,098	3,108
Aguila Project
Asset Retirement Obligation, Roll Forward Analysis
Reclamation liabilities - balance at beginning of period	2,000
Reclamation liabilities - balance at end of period	$ 1,900	$ 2,000