Asset Retirement Obligation and Reclamation Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Asset Retirement Obligation and Reclamation Liabilities

Summary of activity in the Velardena Properties ARO

	Three Months Ended
	March 31,
	2018		2017
	(in thousands)
Beginning balance	$	2,448	$	2,380
Changes in estimates, and other		1		(128)
Accretion expense		51		49
Ending balance	$	2,500	$	2,301