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Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Cost	$ 11,139	$ 11,139
Accumulated depreciation	5,507	5,496
Net	5,632	5,643
Mt Todd, Australia
Property, Plant and Equipment [Line Items]
Cost	5,306	5,306
Accumulated depreciation	5,174	5,163
Net	132	143
Corporate, United States
Property, Plant and Equipment [Line Items]
Cost	333	333
Accumulated depreciation	333	333
Net	0	0
Used mill equipment, Canada
Property, Plant and Equipment [Line Items]
Cost	5,500	5,500
Accumulated depreciation	0	0
Net	$ 5,500	$ 5,500

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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