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Plant and Equipment, Net (Tables)
3 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Abstract]  
Components of plant, equipment, and mine development, net
The following table provides the components of Plant and equipment, net (dollars in thousands):
Depreciation Life
or Method
March 31,
2022
December 31,
2021
Leach padsUnits-of-production$17,431 $17,431 
Process equipment
5 - 15 years
17,755 17,735 
Buildings and leasehold improvements
10 years
9,280 9,280 
Mine equipment
5 - 7 years
6,026 6,224 
Vehicles
3 - 5 years
1,454 1,454 
Furniture and office equipment
7 years
330 330 
Construction in progress and other35,794 35,794 
$88,070 $88,248 
Less, accumulated depreciation and amortization(30,221)(29,764)
Total$57,849 $58,484