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v3.22.2.2

Property, Plant and Mine Development, net - Summary of Property, Equipment and Mine Development (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Property, equipment and mine development - net |  |  |
Property and equipment, gross | [1] | $ 274,033 | $ 261,938
Accumulated depreciation and amortization |  | (124,801) | (105,167)
Total property, equipment and mine development - net |  | 149,232 | 156,771
Accrued capital expenditures |  | 200 | 1,700
Asset retirement costs |  |  |
Property, equipment and mine development - net |  |  |
Property and equipment, gross |  | 1,065 | 1,065
Construction-In-Progress |  |  |
Property, equipment and mine development - net |  |  |
Property and equipment, gross |  | 300 | 15,854
Furniture and office equipment |  |  |
Property, equipment and mine development - net |  |  |
Property and equipment, gross |  | 1,719 | 1,685
Land |  |  |
Property, equipment and mine development - net |  |  |
Property and equipment, gross |  | 9,033 | 9,230
Mineral interests |  |  |
Property, equipment and mine development - net |  |  |
Property and equipment, gross |  | 79,543 | 79,964
Light Vehicles And Other Mobile Equipment |  |  |
Property, equipment and mine development - net |  |  |
Property and equipment, gross |  | 2,328 | 2,224
Machinery And Equipment |  |  |
Property, equipment and mine development - net |  |  |
Property and equipment, gross |  | 40,119 | 33,213
Mill facilities and infrastructure |  |  |
Property, equipment and mine development - net |  |  |
Property and equipment, gross |  | 35,917 | 24,973
Mine Development |  |  |
Property, equipment and mine development - net |  |  |
Property and equipment, gross |  | 102,457 | 92,138
Software and licenses |  |  |
Property, equipment and mine development - net |  |  |
Property and equipment, gross |  | $ 1,552 | $ 1,592
[1] | Includes accrued capital expenditures of $0.2 million and $1.7 million at September 30, 2022 and December 31, 2021, respectively.

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