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Property, Plant and Equipment, Net (Tables)
 9 Months Ended
Sep. 30, 2016
Property, Plant and Equipment  
Schedule of components of property, plant and equipment

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

September 30,

 

December 31,

 

 

    

2016

    

2015

 

 

 

(in thousands)

 

Mineral properties

 

$
9,575

 

$
9,630

 

Exploration properties

 

 
2,518

 

 
2,518

 

Royalty properties

 

 
200

 

 
200

 

Buildings

 

 
4,386

 

 
4,377

 

Mining equipment and machinery

 

 
16,337

 

 
16,998

 

Other furniture and equipment

 

 
952

 

 
841

 

Asset retirement cost

 

 
992

 

 
1,285

 

 

 

 
34,960

 

 
35,849

 

Less: Accumulated depreciation and amortization

 

 
(25,507)

 

 
(24,724)

 

 

 

$
9,453

 

$
11,125