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Asset Retirement Obligation and Reclamation Liabilities (Tables)
 12 Months Ended
Dec. 31, 2017
Asset Retirement Obligation and Reclamation Liabilities  
Summary of activity in the Velardena Properties ARO

 

 

 

 

 

 

 

 

 

 

Year Ended

 

 

 

December 31,

 

 

    

2017

    

2016

 

 

 

(in thousands)

 

Beginning balance

 

$

2,380

 

$

2,480

 

 

 

 

 

 

 

 

 

Changes in estimates, and other

 

 

(128)

 

 

(293)

 

Accretion expense

 

 

196

 

 

193

 

Ending balance

 

$

2,448

 

$

2,380