Reclamation and Remediation (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Asset Retirement Obligation, Roll Forward Analysis
Subtotal of reclamation liabilities - opening balance	$ 2,545	$ 2,887
Adjustments	17
Foreign currency exchange (loss)	(139)	7
Subtotal of reclamation liabilities - ending balance	2,423	2,894
Asset retirement obligation – opening balance	448
Adjustment	(113)
Accretion	30
Foreign currency exchange (loss)	(23)
Total Asset retirement obligation – ending balance	342
Total reclamation liabilities	$ 2,765	$ 2,894