Plant and Equipment, Net - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Feb. 28, 2021
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 3,400	$ 8,500
Impairment charges and write-downs – Notes 3, 5, and 7	1,051	17,326
Capitalized interest	0	654
Plant, equipment and mine development, gross	86,554	88,248
Leach pads
Property, Plant and Equipment [Line Items]
Depreciation expense		1,700
Construction in progress and other
Property, Plant and Equipment [Line Items]
Plant, equipment and mine development, gross	$ 35,721	$ 35,794	$ 34,100