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Plant And Equipment | 12 Months Ended
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Dec. 31, 2019
Plant and Equipment |
Plant And Equipment | 5. Plant and Equipment
|  | December 31, 2019 |  | December 31, 2018 |
|  |  |  |  | Accumulated |  |  |  |  |  |  |  | Accumulated |  |  |  |
|  | Cost |  | depreciation |  | Net |  | Cost |  | depreciation |  | Net |
Mt Todd, Australia |  | $ | 5,237 |  | $ | 5,114 |  | $ | 123 |  | $ | 5,197 |  | $ | 5,062 |  | $ | 135 |
Corporate, United States |  |  | 333 |  |  | 333 |  |  | — |  |  | 333 |  |  | 333 |  |  | — |
Used mill equipment, Canada |  |  | 5,500 |  |  | — |  |  | 5,500 |  |  | 5,500 |  |  | — |  |  | 5,500 |
|  | $ | 11,070 |  | $ | 5,447 |  | $ | 5,623 |  | $ | 11,030 |  | $ | 5,395 |  | $ | 5,635 |
We continue to actively market the used mill equipment, however, we do not classify it as ‘held for sale’ on our Consolidated Balance Sheets as of December 31, 2019 or 2018 as we do not have reasonable assurance that the mill equipment will sell within 12 months. We are not currently depreciating the used mill equipment as we continue to market it and it is not in use. Based on an independent valuation report prepared by a qualified third party, and allowing for selling commissions and costs, the Company recorded a Level 3 impairment charge of $1,000 for the year ended December 31, 2018. The carrying value of the used mill equipment is $5,500 as of December 31, 2019 and 2018. December 31, 2018 cost basis and accumulated depreciation totals were adjusted for fully depreciated assets which were no longer in use and had been removed from service. The Company recorded additional depreciation of $695 in 2018 to adjust the net book value of plant and equipment to account for the cumulative effect of immaterial calculation differences in prior years. No such adjustments were made in 2019.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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