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Property, Plant and Equipment, Net (Tables)
 6 Months Ended
Jun. 30, 2020
Property, Plant and Equipment, Net  
Schedule of components of property, plant and equipment

 

 

 

 

 

 

 

 

 

 

June 30,

 

December 31,

 

 

    

2020

    

2019

 

 

 

(in thousands)

 

Mineral properties

 

$

9,353

 

$

9,353

 

Exploration properties

 

 

2,418

 

 

2,518

 

Royalty properties

 

 

200

 

 

200

 

Buildings

 

 

3,755

 

 

3,755

 

Mining equipment and machinery

 

 

16,051

 

 

16,049

 

Other furniture and equipment

 

 

885

 

 

884

 

Asset retirement cost

 

 

948

 

 

866

 

 

 

 

33,610

 

 

33,625

 

Less: Accumulated depreciation and amortization

 

 

(28,139)

 

 

(27,594)

 

 

 

$

5,471

 

$

6,031